LOCAL CLIMATOLOGICAL DATA
Monthly Summary
December 2021
Station: KPWR Portsmouth, Virginia
Latitude: 36° 59' 09" N Longitude: 76° 33' 00" W Elevation (ground): 13 feet Time Zone: Eastern
+--+-------------------------------+----+---------+---------+--+-----------+--------------------+-----------------------------+------+
| | Temperature | |Deg. Days|Precip Ty| | Precip | Pressure | Wind |Solar |
| +------+------+------+------+---+ Hu-+----+----+1 fog | S+-----+-----+ Adj. to Sea Level +----+----+---+-------+-------+------+
| | M | M | A | | |mid-| H | C |2 hvy fog| n| | Ice +------+------+------+ Avg| Res|Res| Peak |2Minute| Mean |
| | a | i | v | | D | ity| e | o |3 thunder| o|Water| plts| | | | | | +---+---+---+---+ W |
| | x | n | e | | e | | a | o |4 ice plt| w| | | | | | S | S | | S | | S | | a |
| D| i | i | r | M | w | M | t | l |5 hail | | E | S | | | M | p | p | | p | | p | | t |
| a| m | m | a | e | | e | i | i |6 glaze | C| q | n | M | M | e | e | e | D | e | D | e | D | t |
| t| u | u | g | a | P | a | n | n |7 duststm| v| u | o | a | i | a | e | e | i | e | i | e | i | s |
| e| m | m | e | n | t | n | g | g |8 smk, hz| r| v | w | x | n | n | d | d | r | d | r | d | r | m^2 |
| | | | | | | | | |9 blw snw| | | | | | | | | | | | | | |
| 1| 2 | 3 | 4A | 4B | 5 | 6 | 7 | 8 | 9 |10| 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18| 19| 20| 21| 22| 23 |
+--+------+------+------+------+---+----+----+----+---------+--+-----+-----+------+------+------+----+----+---+---+---+---+---+------+
|01| 60.0 | 31.2 | 45.6 | 46.1 | 37| 75| 19| 0|.........| 0| 0.00| 0.0| 30.23| 0.77|30.105| 4.4| 3.7|177| 16|SSE| 0| 0| |
|02| 68.4 | 46.3 | 57.3 | 56.9 | 46| 69| 8| 0|.........| 0| 0.00| 0.0| 30.04| 29.80|29.893| 7.4| 7.3|218| 26| SW| 0| 0| |
|03| 60.3 | 43.5 | 51.9 | 53.5 | 43| 70| 13| 0|.........| 0| 0.00| 0.0| 30.09| 29.81|29.991| 4.9| 0.8|124| 20|SSW| 0| 0| |
|04| 62.9 | 42.2 | 52.6 | 50.4 | 46| 86| 12| 0|.........| 0| 0.00| 0.0| 30.21| 30.01|30.077| 3.4| 0.6|334| 16| NE| 0| 0| |
|05| 59.8 | 40.5 | 50.2 | 51.3 | 46| 83| 14| 0|.........| 0| 0.00| 0.0| 30.33| 30.12|30.232| 5.5| 4.9| 55| 21|ENE| 0| 0| |
| | | | | | | | | | | | | | | | | | | | | | | | |
|06| 70.3 | 50.6 | 60.5 | 60.0 | 55| 83| 4| 0|1........| 0| 0.00| 0.0| 30.11| 29.79|29.942| 7.2| 6.7|203| 34|SSW| 0| 0| |
|07| 66.4 | 40.0 | 53.2 | 46.0 | 28| 51| 12| 0|.........| 0| 0.00| 0.0| 30.25| 29.97|30.159| 9.7| 9.0| 20| 31| N| 0| 0| |
|08| 45.9 | 32.2 | 39.1 | 42.1 | 38| 85| 26| 0|1........| 0| 0.33| 0.0| 30.09| 29.86|29.986| 4.9| 3.9| 21| 28| N| 0| 0| |
|09| 45.0 | 31.2 | 38.1 | 38.3 | 31| 77| 27| 0|.........| 0| 0.00| 0.0| 30.28| 30.08|30.222| 5.7| 3.0| 0| 23| N| 0| 0| |
|10| 52.3 | 31.2 | 41.8 | 44.4 | 43| 93| 23| 0|1........| 0| 0.05| 0.0| 30.19| 30.07|30.142| 2.8| 1.7|219| 13| S| 0| 0| |
| | | | | | | | | | | | | | | | | | | | | | | | |
|11| 74.2 | 52.3 | 63.3 | 63.6 | 62| 94| 2| 0|1........| 0| 0.40| 0.0| 30.04| 29.81|29.918| 8.7| 8.7|204| 28|SSW| 0| 0| |
|12| 61.2 | 31.6 | 46.4 | 46.2 | 34| 66| 18| 0|1........| 0| 0.47| 0.0| 30.38| 29.86|30.219| 7.8| 6.9|347| 29| NW| 0| 0| |
|13| 54.4 | 28.4*| 41.4 | 39.7 | 32| 76| 24| 0|.........| 0| 0.00| 0.0| 30.44| 30.31|30.369| 2.4| 2.4|227| 17| SW| 0| 0| |
|14| 55.5 | 31.1 | 43.3 | 43.6 | 37| 78| 21| 0|1........| 0| 0.00| 0.0| 30.53| 30.34|30.445| 4.4| 4.1| 43| 22|ENE| 0| 0| |
|15| 66.6 | 43.8 | 55.2 | 53.1 | 50| 91| 9| 0|1........| 0| 0.00| 0.0| 30.51| 30.33|30.435| 3.9| 1.6| 43| 15| N| 0| 0| |
| | | | | | | | | | | | | | | | | | | | | | | | |
|16| 68.4 | 45.6 | 57.0 | 56.7 | 53| 87| 8| 0|1........| 0| 0.00| 0.0| 30.30| 30.11|30.201| 6.1| 5.9|221| 26| SW| 0| 0| |
|17| 71.8 | 55.3 | 63.6 | 62.4 | 59| 88| 1| 0|12.......| 0| 0.00| 0.0| 30.18| 30.09|30.134| 5.8| 4.7|223| 21| SW| 0| 0| |
|18| 68.5 | 53.6 | 61.0 | 61.9 | 61| 95| 3| 0|12.......| 0| T | 0.0| 30.13| 29.85|30.008| 5.2| 5.1|215| 21|SSW| 0| 0| |
|19| 67.2 | 40.0 | 53.6 | 50.1 | 46| 89| 11| 0|1........| 0| 0.69| 0.0| 30.24| 29.84|30.036|12.5| 7.6| 1| 32|NNE| 0| 0| |
|20| 41.3 | 34.2 | 37.8 | 37.9 | 32| 81| 27| 0|.........| 0| 0.00| 0.0| 30.39| 30.22|30.291| 8.1| 7.4| 28| 29|NNE| 0| 0| |
| | | | | | | | | | | | | | | | | | | | | | | | |
|21| 48.3 | 36.2 | 42.3 | 44.2 | 42| 90| 23| 0|1........| 0| 0.07| 0.0| 30.19| 29.69|29.983| 7.0| 6.0| 27| 18| NE| 0| 0| |
|22| 50.2 | 40.5 | 45.3 | 44.2 | 40| 87| 19| 0|1........| 0| 0.01| 0.0| 30.04| 29.61|29.762| 6.1| 5.2|328| 19| N| 0| 0| |
|23| 42.2 | 32.5 | 37.3*| 37.9 | 27| 65| 27| 0|.........| 0| 0.00| 0.0| 30.28| 30.07|30.207| 7.0| 4.8|357| 20| N| 0| 0| |
|24| 60.0 | 32.5 | 46.3 | 47.3 | 37| 69| 18| 0|.........| 0| 0.00| 0.0| 30.16| 29.90|30.057| 7.7| 7.5|215| 25| SW| 0| 0| |
|25| 68.3 | 51.5 | 59.9 | 60.0 | 51| 73| 5| 0|.........| 0| 0.00| 0.0| 29.87| 29.63|29.739|12.7|12.7|224| 32| SW| 0| 0| |
| | | | | | | | | | | | | | | | | | | | | | | | |
|26| 65.7 | 44.4 | 55.0 | 57.9 | 50| 76| 10| 0|.........| 0| 0.00| 0.0| 30.10| 29.73|29.919| 4.0| 1.3|295| 20| SW| 0| 0| |
|27| 58.2 | 43.4 | 50.8 | 50.9 | 45| 80| 14| 0|.........| 0| 0.00| 0.0| 30.10| 29.80|29.963| 5.3| 2.6|121| 20|ESE| 0| 0| |
|28| 60.0 | 52.7 | 56.3 | 56.0 | 49| 79| 8| 0|.........| 0| 0.00| 0.0| 29.96| 29.78|29.863| 7.2| 1.4|147| 19|SSE| 0| 0| |
|29| 74.3*| 53.7 | 64.0*| 66.4 | 63| 89| 1| 0|1........| 0| 0.05| 0.0| 29.86| 29.77|29.829| 8.1| 7.4|222| 26| SW| 0| 0| |
|30| 57.5 | 52.4 | 55.0 | 53.3 | 53| 98| 10| 0|12.......| 0| 0.03| 0.0| 29.92| 29.81|29.885| 4.2| 3.7| 16| 21| N| 0| 0| |
| | | | | | | | | | | | | | | | | | | | | | | | |
|31| 58.6 | 51.9 | 55.3 | 55.1 | 55| 99| 9| 0|12.......| 0| 0.13| 0.0| 30.02| 29.90|29.946| 5.4| 1.6|199| 20|SSW| 0| 0| |
+--+------+------+------+------+---+----+----+----+---------+--+-----+-----+------+------+------+----+----+---+---+---+---+---+------+
| Sum | Sum |------|------|---|----| Ttl| Ttl| |Total|Total| For the month: | ---- |
+------+------+------+------+---+----+----+----+ Number of +-----+-----+------+------+------+----+----+---+---+---+---+---+------+
|1863.7|1296.5|------|------|---|----| 426| 0| Days | 2.23| 0.0| 30.53| 0.77|30.063| 6.3| 0.8|279| 34|SSW| 0| 0| ---- |
+------+------+------+------+---+----+----+----+------------|-1.10" or 67% of normal +------+----+----+---+---+---+---+---+------+
| Avg | Avg | Avg | Mean |Avg| Avg|----|----|Precip | Season Ttl| Date | Date |------|----|----|---| Date | Date | Avg |
+------+------+------+------+---+----+----+----+ +-----+-----+------+------+------+----+----+---+-------+-------+------+
| 60.1| 41.7| 50.9 | 50.9 | 45|81.4|----|----|≥.01 Inch 10|47.25| 0.0| 14 | 1 |------|----|----|---| 6 | 1+ | |
+ +6.6 +5.4 +6.0 ------+---+----+----+----+------------|-3.54" or 93% of normal +------+----+----+---+-------+-------+------+
| | Season |Snow, Ice | | |
| Number of Days | to Date |≥1.0 Inch 0| Greatest in 24 Hours and Dates | Greatest Depth on Ground |
+------------------+-----------------+----+----+------------+--------------+-----------------+ of Snow, Ice Pellets or Ice |
| Max Temperature | Min Temperature | 904|1923|Thunder 0|Precipitation | Snow, Ice Plts | and Date |
+--------+---------+--------+--------+----+----+------------+-------+------+---------+-------+-------------+----------------------+
| ≥90°F | ≤32°F | ≤32°F | ≤0°F |----|----|Heavy Fog 4| 0.87| 11-12| 0.0 | - | 0 | - |
+--------+---------+--------+--------+----+----+------------+-------+------+---------+----+--+-------------+----------------------+
| 0 | 0 | 7 | 0 |----|----| Clear 14 Partly Cloudy 10 Cloudy 7 |
+--------+---------+--------+--------+----+----+------------------------------------------+
NOTES:
Data in column 4A are (MAX+MIN) / 2, whereas data in columns 4B, 5, 6, 15, 16, 23 are means via continuous observations
Units are: Temperature=°F, Wind=mph, Pressure=Inches Hg, Precipitation=inches.
for 24 hours.
Column 5: Dew point is calculated from temperature and humidity and is continuously averaged for 24 hours.
Columns 7, 8: Degree Days heating base is 65°F, cooling base is 65°F.
Data in columns 9, 10, 12 are entered manually by the station observer.
Columns 17-18: Resultant wind is calculated by the vector sum of continuous wind observations.
Data in columns 4B, 5, 6, 15, 16, 23 are updated continuously, there by achieving a "true" mean.
OBSERVER NOTES:
DECEMBER 2021 was the 3RD WARMEST DECEMBER in the database to DECEMBER 1977;
the 5 WARMEST DECEMBERS INCLUDE: 1) 56.8° 2015 2) 52° 1984 3) 50.9° 2021 4) 50.7° 1990 5) 50.0° 1998
COLD FROPA (WARM FROPAs NOTED):
3rd, 4th(WARM THEN COLD), 6th(WARM THEN COLD), 7th, 9th, 10th(WARM); 12th; 18th(WARM); 19th, 22nd, 24th(WARM), 26th, 27th, 28th(WARM), 29th(WARM)
FROST: 1st, 8th, 9th, 10th, 13th, 14th, 20th (cartops)
DAILY STATION:
11th - TEMPERATURE Maximum 74° [previous 70 in 1985]
16th - TEMPERATURE Maximum 68° [previous 67 in 2019]
17th - TEMPERATURE Maximum 72° [previous 69° in 2000]
18th- TEMPEARTURE Maximum Minimum [previous 51° in 1996]
31st - TEMPEARTURE TIED Maximum Low 52° [previous 1992]
MONTHLY AVERAGE MAXIMUM TEMP OF 60.1° WAS 6.6° ABOVE NORMAL.
MONTHLY AVERAGE MINIMUM TEMP OF 41.7° WAS 5.4° ABOVE NORMAL.
MONTHLY AVERAGE AVERAGE TEMP OF 50.9° WAS 6.0° ABOVE NORMAL.
MAXIMUM TEMP: 74° ON THE 11th & 29th
MINIMUM TEMP: 28° ON THE 13th
DAYS WITH TEMPERATURES:
MAXIMUM >= 90° : 0
MAXIMUM <= 32° : 0
MINIMUM <= 32° : 9
MINIMUM <= 0° : 0
HEATING DEGREE DAYS: 438.0
COOLING DEGREE DAYS: 0.0
DAYS WITH HEATING DEGREE DAYS: 31
DAYS WITH COOLING DEGREE DAYS: 0
PRECIP TOTAL OF 2.23" WAS 1.10" BELOW NORMAL ( 67% OF NORMAL).
GREATEST DAILY RAINFALL: 0.69" ON THE 19th
GREATEST 24-HOUR RAINFALL: 0.87" ON THE 11th - 12th
DAYS WITH MEASUREABLE PRECIP: 7 OR 32.26%
AVERAGE DAILY PRECIP: 0.07"
NORMAL DAILY PRECIP: 0.11"
DAYS WITH PRECIP >= 0.01" 10
DAYS WITH PRECIP >= 0.10" 5
DAYS WITH PRECIP >= 0.50" 1
DAYS WITH PRECIP >= 1.00" 0
DAYS WITH THUNDERSTORMS: 0
NUMBER OF THUNDERSTORMS: 0
DAYS WITH SNOW: 0
SNOWFALL TOTAL: 0.0"
CLOUDY DAYS: 7
PARTLY CLOUDY DAYS: 10
SUNNY/CLEAR DAYS: 14
DAYS WITH F/GF: 16
DAYS WITH DENSE FOG: 4
DAYS WITH FROST: 7
YEAR-TO-DATE
YEARLY AVERAGE MAXIMUM TEMP OF 71.1° WAS 1.2° ABOVE NORMAL.
YEARLY AVERAGE MINIMUM TEMP OF 52.8° WAS 1.0° ABOVE NORMAL.
YEARLY AVERAGE TEMP OF 62.0° WAS 1.2° ABOVE NORMAL.
MAXIMUM TEMP: 98° ON MAY 28th
MINIMUM TEMP: 26° ON JANUARY 29th & MARCH 8th
DAYS WITH TEMPERATURES:
MAXIMUM >= 90°: 57
MAXIMUM <= 32°: 0
MINIMUM <= 32°: 46
MINIMUM <= 0°: 0
HEATING DEGREE DAYS: 2990.0
COOLING DEGREE DAYS: 1881.0
DAYS WITH HEATING DEGREE DAYS: 197
DAYS WITH COOLING DEGREE DAYS: 165
PRECIP TOTAL OF 47.25" WAS 3.56" BELOW NORMAL (93% OF NORMAL).
GREATEST DAILY RAINFALL: 2.74" ON AUGUST 16th
GREATEST 24-HOUR RAINFALL: 2.74" ON AUGUST 16th
DAYS WITH MEASUREABLE PRECIP: 128 OF 335 OR 35.07%
AVERAGE DAILY PRECIP: 0.13"
NORMAL DAILY PRECIP: 0.14"
DAYS WITH PRECIP >= 0.01" 128
DAYS WITH PRECIP >= 0.10" 86
DAYS WITH PRECIP >= 0.50" 38
DAYS WITH PRECIP >= 1.00" 9
DAYS WITH THUNDERSTORMS: 35
NUMBER OF THUNDERSTORMS: 36
DAYS WITH SNOW: 6
SNOWFALL TOTAL: 3.4"
CLOUDY DAYS: 68
PARTLY CLOUDY DAYS: 118
SUNNY/CLEAR DAYS: 179
DAYS WITH F/GF: 111
DAYS WITH DENSE FOG: 5
DAYS WITH FROST: 43
OBSERVATIONS AT 3-HOUR INTERVALS
December 2021: KPWR Portsmouth, Virginia
+--+----+-----+-----+---+---+---+----------+----+-----+-----+---+---+---+----------+----+-----+-----+---+---+---+----------+
| | | | | | | | | | | | | | | | | | | | | | |
| | | | | T | | | Wind | | | | T | | | Wind | | | | T | | | Wind |
| | | | R | e | | % +--+---+---+ | | R | e | | % +--+---+---+ | | R | e | | % +--+---+---+
| | | | a | m | D | | D| | | | | a | m | D | | D| | | | | a | m | D | | D| | |
| | S | P | i | p | e | H | i| | | S | P | i | p | e | H | i| | | S | P | i | p | e | H | i| | |
| | u | r | n | e | w | u | r| | | u | r | n | e | w | u | r| | | u | r | n | e | w | u | r| | |
| | n | e | f | r | | m | e| | | n | e | f | r | | m | e| | | n | e | f | r | | m | e| | |
| | s | s | a | a | P | i | c| S | | s | s | a | a | P | i | c| S | | s | s | a | a | P | i | c| S | |
| H| h | s | l | t | o | d | t| p | G | h | s | l | t | o | d | t| p | G | h | s | l | t | o | d | t| p | G |
| o| i | u | l | u | i | i | i| e | u | i | u | l | u | i | i | i| e | u | i | u | l | u | i | i | i| e | u |
| u| n | r | | r | n | t | o| e | s | n | r | | r | n | t | o| e | s | n | r | | r | n | t | o| e | s |
| r| e | e | Rate| e | t | y | n| d | t | e | e | Rate| e | t | y | n| d | t | e | e | Rate| e | t | y | n| d | t |
+--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+
| DEC 1 | DEC 2 | DEC 3 |
| | | |
|01| |30.07| 0.00| 43| 31| 62|22| 5| 11| |30.04| 0.00| 50| 42| 76|20| 5| 10| |29.81| 0.00| 58| 48| 67|22| 7| 20|
|04| |30.11| 0.00| 37| 30| 75|22| 4| 6| |29.98| 0.00| 49| 43| 80|20| 5| 10| |29.86| 0.00| 53| 46| 76|22| 4| 10|
|07| |30.18| 0.00| 32| 28| 86|00| 0| 0| |29.98| 0.00| 46| 42| 86|20| 4| 11| |29.96| 0.00| 48| 44| 86|31| 4| 12|
|10| |30.23| 0.00| 43| 37| 79|18| 4| 7| |29.95| 0.00| 55| 47| 74|22| 7| 17| |30.04| 0.00| 55| 42| 63|06| 10| 17|
|13| |30.17| 0.00| 57| 38| 50|18| 6| 13| |29.85| 0.00| 67| 50| 54|22| 11| 22| |30.00| 0.00| 58| 41| 53|27| 6| 13|
|16| |30.12| 0.00| 59| 43| 54|15| 7| 16| |29.81| 0.00| 67| 49| 52|22| 11| 23| |30.01| 0.00| 60| 44| 54|15| 5| 12|
|19| |30.13| 0.00| 50| 43| 77|18| 6| 11| |29.81| 0.00| 60| 48| 63|20| 6| 16| |30.07| 0.00| 51| 42| 69|13| 5| 10|
|22| |30.09| 0.00| 48| 44| 86|15| 5| 11| |29.81| 0.00| 60| 48| 65|22| 11| 25| |30.08| 0.00| 46| 42| 85|15| 0| 5|
+--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+
| DEC 4 | DEC 5 | DEC 6 |
| | | |
|01| |30.04| 0.00| 43| 41| 91|00| 0| 0| |30.21| 0.00| 45| 42| 92|04| 0| 6| |30.11| 0.00| 53| 49| 88|27| 4| 7|
|04| |30.02| 0.00| 42| 41| 94|00| 0| 0| |30.24| 0.00| 41| 39| 94|00| 0| 0| |30.08| 0.00| 52| 51| 95|22| 4| 11|
|07| |30.02| 0.00| 44| 43| 96|15| 0| 6| |30.29| 0.00| 47| 44| 90|04| 6| 16| |30.06| 0.00| 51| 50| 96|18| 5| 10|
|10| |30.06| 0.00| 54| 53| 95|22| 6| 15| |30.33| 0.00| 55| 46| 71|06| 10| 17| |30.01| 0.00| 56| 55| 98|18| 7| 17|
|13| |30.02| 0.00| 61| 50| 67|31| 5| 14| |30.26| 0.00| 59| 48| 67|06| 10| 21| |29.89| 0.00| 67| 60| 78|20| 11| 22|
|16| |30.08| 0.00| 59| 51| 76|04| 7| 14| |30.23| 0.00| 57| 50| 78|06| 7| 16| |29.82| 0.00| 70| 57| 64|20| 11| 25|
|19| |30.14| 0.00| 51| 47| 84|02| 4| 7| |30.17| 0.00| 54| 50| 85|04| 7| 15| |29.79| 0.00| 66| 56| 72|20| 7| 20|
|22| |30.20| 0.00| 48| 45| 88|04| 0| 5| |30.14| 0.00| 52| 49| 89|02| 0| 5| |29.84| 0.00| 64| 57| 78|20| 6| 17|
+--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+
| DEC 7 | DEC 8 | DEC 9 |
| | | |
|01| |29.97| 0.00| 57| 43| 59|00| 15| 31| |30.09| 0.00| 43| 35| 72|06| 4| 10| |30.08| 0.00| 32| 30| 95|27| 0| 5|
|04| |30.09| 0.00| 49| 26| 40|02| 13| 26| |30.05| 0.00| 46| 37| 71|04| 7| 15| |30.15| 0.00| 37| 31| 79|31| 7| 17|
|07| |30.20| 0.00| 44| 23| 44|02| 14| 26| |30.02| 0.00| 46| 41| 82|04| 6| 13| |30.20| 0.00| 38| 29| 72|00| 10| 19|
|10| |30.25| 0.00| 44| 28| 52|00| 12| 23| |30.01| 0.05| 44| 43| 96|00| 7| 28| |30.28| 0.00| 41| 32| 71|33| 10| 16|
|13| |30.19| 0.00| 46| 25| 43|04| 12| 19| |29.88| 0.00| 43| 39| 86|00| 7| 18| |30.26| 0.00| 44| 34| 68|00| 7| 14|
|16| |30.18| 0.00| 45| 23| 41|06| 7| 15| |29.88| 0.00| 44| 38| 80|00| 6| 13| |30.25| 0.00| 45| 34| 65|15| 5| 12|
|19| |30.18| 0.00| 44| 30| 58|06| 4| 14| |29.94| 0.00| 39| 36| 88|00| 0| 0| |30.27| 0.00| 38| 32| 78|15| 4| 7|
|22| |30.15| 0.00| 41| 31| 68|04| 4| 7| |30.01| 0.00| 34| 33| 93|00| 0| 0| |30.24| 0.00| 34| 31| 89|15| 0| 5|
+--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+
| DEC 10 | DEC 11 | DEC 12 |
| | | |
|01| |30.19| 0.00| 32| 30| 92|00| 0| 0| |30.04| 0.00| 53| 53| 98|20| 0| 7| |29.86| 0.16| 61| 60| 98|22| 6| 14|
|04| |30.17| 0.00| 37| 36| 95|18| 4| 7| |30.02| 0.00| 55| 55| 98|20| 5| 11| |30.01| 0.00| 50| 44| 79|02| 12| 22|
|07| |30.18| 0.00| 39| 37| 94|00| 0| 0| |29.99| 0.00| 57| 57| 99|20| 7| 15| |30.16| 0.00| 47| 36| 64|33| 13| 28|
|10| |30.19| 0.00| 45| 41| 85|27| 5| 11| |30.00| 0.00| 63| 62| 98|20| 11| 23| |30.28| 0.00| 47| 32| 57|00| 13| 24|
|13| |30.14| 0.00| 48| 45| 89|31| 4| 6| |29.89| 0.00| 70| 68| 93|20| 12| 26| |30.28| 0.00| 49| 26| 41|02| 14| 25|
|16| |30.08| 0.00| 50| 49| 96|18| 6| 13| |29.82| 0.00| 74| 69| 84|20| 12| 27| |30.31| 0.00| 49| 26| 41|31| 7| 17|
|19| |30.12| 0.00| 51| 50| 97|18| 5| 11| |29.81| 0.00| 70| 67| 91|20| 12| 25| |30.34| 0.00| 40| 30| 68|29| 0| 5|
|22| |30.10| 0.00| 52| 51| 97|00| 0| 0| |29.85| 0.25| 65| 63| 93|22| 12| 26| |30.36| 0.00| 34| 30| 84|00| 0| 0|
+--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+
| DEC 13 | DEC 14 | DEC 15 |
| | | |
|01| |30.38| 0.00| 31| 28| 88|00| 0| 0| |30.34| 0.00| 36| 33| 88|00| 0| 0| |30.50| 0.00| 44| 43| 95|00| 5| 7|
|04| |30.37| 0.00| 29| 27| 91|00| 0| 0| |30.36| 0.00| 34| 32| 90|00| 0| 0| |30.50| 0.00| 44| 43| 97|33| 5| 6|
|07| |30.40| 0.00| 29| 27| 93|00| 0| 0| |30.40| 0.00| 32| 30| 93|00| 0| 0| |30.51| 0.00| 47| 46| 98|00| 4| 7|
|10| |30.43| 0.00| 40| 35| 82|22| 5| 14| |30.46| 0.00| 49| 38| 65|04| 7| 19| |30.51| 0.00| 52| 51| 96|00| 6| 15|
|13| |30.35| 0.00| 51| 35| 54|22| 7| 16| |30.44| 0.00| 55| 38| 54|06| 10| 17| |30.42| 0.00| 62| 58| 84|18| 6| 14|
|16| |30.32| 0.00| 54| 36| 50|22| 7| 16| |30.46| 0.00| 53| 38| 55|06| 7| 15| |30.38| 0.00| 65| 58| 78|06| 7| 14|
|19| |30.35| 0.00| 45| 35| 68|22| 0| 4| |30.51| 0.00| 46| 40| 80|02| 4| 7| |30.38| 0.00| 58| 54| 88|15| 0| 4|
|22| |30.36| 0.00| 39| 34| 83|00| 0| 0| |30.53| 0.00| 45| 43| 93|00| 5| 10| |30.36| 0.00| 51| 50| 94|15| 4| 6|
+--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+
| DEC 16 | DEC 17 | DEC 18 |
| | | |
|01| |30.30| 0.00| 48| 47| 96|15| 0| 6| |30.10| 0.00| 59| 57| 91|22| 7| 16| |30.13| 0.00| 55| 54| 96|13| 0| 6|
|04| |30.28| 0.00| 48| 47| 97|15| 0| 7| |30.10| 0.00| 60| 58| 94|22| 10| 20| |30.10| 0.00| 54| 54| 97|00| 0| 0|
|07| |30.28| 0.00| 46| 45| 97|22| 5| 10| |30.14| 0.00| 60| 58| 96|22| 7| 17| |30.08| 0.00| 58| 58| 98|20| 4| 7|
|10| |30.28| 0.00| 52| 51| 98|22| 6| 14| |30.18| 0.00| 64| 61| 90|22| 10| 20| |30.08| 0.00| 61| 61| 99|22| 7| 15|
|13| |30.17| 0.00| 65| 57| 76|22| 11| 21| |30.12| 0.00| 69| 63| 81|22| 6| 15| |30.00| 0.00| 67| 63| 88|22| 11| 19|
|16| |30.11| 0.00| 68| 56| 67|22| 11| 23| |30.12| 0.00| 71| 62| 74|29| 5| 12| |29.95| 0.00| 67| 64| 90|22| 7| 17|
|19| |30.13| 0.00| 64| 57| 77|22| 6| 16| |30.16| 0.00| 62| 58| 87|06| 0| 6| |29.93| 0.00| 65| 63| 94|20| 6| 11|
|22| |30.11| 0.00| 62| 57| 84|20| 7| 18| |30.15| 0.00| 57| 55| 93|13| 4| 5| |29.89| 0.00| 66| 65| 96|20| 7| 17|
+--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+
MAXIMUM SHORT DURATION PRECIPITATION
+------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
| Time Period (minutes) | 5 | 10 | 15 | 20 | 30 | 45 | 60 | 80 | 100 | 120 | 150 | 180 |
+------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
| Precipitation | 0.03 | 0.06 | 0.08 | 0.11 | 0.16 | 0.24 | 0.31 | 0.31 | 0.34 | 0.37 | 0.37 | 0.37 |
+------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
| Ended: Date | 11 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 |
+------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
| Ended: Time | 2104 | 0109 | 0113 | 0119 | 0129 | 0144 | 0158 | 0158 | 2240 | 2255 | 2255 | 2255 |
+------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
The precipitation amounts for the indicated time intervals may occur at any time during the month. The time indicated
is the ending time of the interval. Date and time are not entered for trace amounts.
OBSERVATIONS AT 3-HOUR INTERVALS
December 2021: KPWR Portsmouth, Virginia
+--+----+-----+-----+---+---+---+----------+----+-----+-----+---+---+---+----------+----+-----+-----+---+---+---+----------+
| | | | | | | | | | | | | | | | | | | | | | |
| | | | | T | | | Wind | | | | T | | | Wind | | | | T | | | Wind |
| | | | R | e | | % +--+---+---+ | | R | e | | % +--+---+---+ | | R | e | | % +--+---+---+
| | | | a | m | D | | D| | | | | a | m | D | | D| | | | | a | m | D | | D| | |
| | S | P | i | p | e | H | i| | | S | P | i | p | e | H | i| | | S | P | i | p | e | H | i| | |
| | u | r | n | e | w | u | r| | | u | r | n | e | w | u | r| | | u | r | n | e | w | u | r| | |
| | n | e | f | r | | m | e| | | n | e | f | r | | m | e| | | n | e | f | r | | m | e| | |
| | s | s | a | a | P | i | c| S | | s | s | a | a | P | i | c| S | | s | s | a | a | P | i | c| S | |
| H| h | s | l | t | o | d | t| p | G | h | s | l | t | o | d | t| p | G | h | s | l | t | o | d | t| p | G |
| o| i | u | l | u | i | i | i| e | u | i | u | l | u | i | i | i| e | u | i | u | l | u | i | i | i| e | u |
| u| n | r | | r | n | t | o| e | s | n | r | | r | n | t | o| e | s | n | r | | r | n | t | o| e | s |
| r| e | e | Rate| e | t | y | n| d | t | e | e | Rate| e | t | y | n| d | t | e | e | Rate| e | t | y | n| d | t |
+--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+
| DEC 19 | DEC 20 | DEC 21 |
| | | |
|01| |29.84| 0.00| 67| 65| 93|22| 10| 18| |30.24| 0.00| 39| 30| 68|02| 15| 29| |30.19| 0.00| 37| 35| 94|00| 0| 0|
|04| |29.84| 0.00| 67| 64| 91|22| 10| 18| |30.27| 0.00| 36| 27| 70|04| 13| 26| |30.14| 0.00| 39| 37| 92|22| 0| 5|
|07| |29.92| 0.06| 59| 55| 87|22| 7| 26| |30.32| 0.00| 35| 29| 81|04| 10| 16| |30.11| 0.00| 42| 38| 87|00| 6| 13|
|10| |30.05| 0.05| 46| 45| 95|00| 15| 28| |30.38| 0.00| 37| 31| 78|02| 11| 20| |30.11| 0.00| 45| 41| 85|02| 10| 16|
|13| |30.06| 0.03| 43| 42| 96|00| 14| 26| |30.31| 0.00| 41| 34| 76|06| 10| 18| |29.98| 0.00| 47| 42| 83|04| 10| 17|
|16| |30.09| 0.03| 41| 40| 96|00| 13| 24| |30.29| 0.00| 41| 35| 80|02| 7| 15| |29.92| 0.00| 48| 44| 87|02| 7| 15|
|19| |30.15| 0.00| 42| 39| 88|00| 11| 20| |30.27| 0.00| 39| 35| 86|33| 4| 7| |29.84| 0.01| 48| 47| 94|02| 7| 17|
|22| |30.21| 0.00| 41| 32| 69|02| 15| 28| |30.25| 0.00| 35| 34| 93|31| 0| 6| |29.75| 0.01| 47| 46| 97|00| 7| 16|
+--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+
| DEC 22 | DEC 23 | DEC 24 |
| | | |
|01| |29.67| 0.00| 44| 42| 93|00| 7| 19| |30.07| 0.00| 40| 28| 62|00| 10| 20| |30.16| 0.00| 33| 30| 89|18| 6| 12|
|04| |29.62| 0.00| 42| 41| 96|31| 8| 18| |30.13| 0.00| 38| 25| 60|00| 11| 20| |30.16| 0.00| 36| 33| 88|20| 4| 11|
|07| |29.64| 0.01| 41| 41| 98|31| 4| 17| |30.20| 0.00| 36| 26| 66|00| 10| 19| |30.13| 0.00| 40| 34| 81|22| 11| 21|
|10| |29.71| 0.00| 43| 43| 98|31| 7| 18| |30.28| 0.00| 38| 27| 63|00| 11| 18| |30.12| 0.00| 47| 37| 68|22| 11| 24|
|13| |29.73| 0.00| 47| 43| 87|27| 6| 15| |30.25| 0.00| 40| 26| 57|33| 7| 15| |30.03| 0.00| 57| 40| 54|22| 11| 21|
|16| |29.77| 0.00| 50| 42| 74|31| 7| 16| |30.24| 0.00| 42| 25| 51|00| 6| 13| |30.00| 0.00| 60| 42| 51|20| 7| 16|
|19| |29.86| 0.00| 43| 40| 88|33| 0| 4| |30.22| 0.00| 36| 28| 71|00| 0| 0| |30.00| 0.00| 53| 39| 61|22| 5| 12|
|22| |30.00| 0.00| 44| 34| 68|00| 7| 18| |30.20| 0.00| 33| 28| 81|15| 5| 11| |29.94| 0.00| 50| 39| 65|20| 5| 13|
+--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+
| DEC 25 | DEC 26 | DEC 27 |
| | | |
|01| |29.87| 0.00| 52| 40| 63|20| 7| 17| |29.73| 0.00| 64| 58| 79|22| 11| 20| |30.08| 0.00| 44| 41| 90|13| 4| 7|
|04| |29.83| 0.00| 54| 44| 69|22| 13| 27| |29.78| 0.00| 61| 56| 84|22| 6| 16| |30.08| 0.00| 47| 40| 76|06| 6| 14|
|07| |29.81| 0.00| 54| 47| 78|22| 15| 27| |29.87| 0.00| 56| 53| 89|00| 4| 7| |30.08| 0.00| 44| 39| 82|06| 4| 13|
|10| |29.79| 0.00| 58| 52| 79|22| 15| 27| |29.96| 0.00| 59| 51| 73|02| 7| 19| |30.06| 0.00| 50| 45| 85|06| 5| 13|
|13| |29.67| 0.00| 65| 55| 69|22| 15| 28| |29.92| 0.00| 64| 49| 59|31| 3| 10| |29.95| 0.00| 56| 47| 72|15| 10| 16|
|16| |29.64| 0.00| 68| 56| 65|22| 13| 25| |29.93| 0.00| 63| 48| 58|06| 6| 13| |29.89| 0.00| 58| 49| 71|24| 6| 19|
|19| |29.68| 0.00| 63| 55| 76|22| 10| 18| |30.00| 0.00| 54| 45| 71|00| 0| 0| |29.86| 0.00| 54| 48| 82|27| 0| 7|
|22| |29.69| 0.00| 63| 57| 79|22| 11| 23| |30.06| 0.00| 47| 43| 84|00| 0| 0| |29.83| 0.00| 51| 48| 90|18| 0| 5|
+--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+
| DEC 28 | DEC 29 | DEC 30 |
| | | |
|01| |29.78| 0.00| 55| 51| 87|22| 6| 13| |29.77| 0.00| 56| 56| 98|20| 7| 18| |29.83| 0.01| 56| 55| 96|00| 5| 10|
|04| |29.81| 0.00| 56| 54| 92|22| 6| 14| |29.78| 0.00| 61| 60| 97|22| 10| 23| |29.83| 0.00| 53| 53| 98|06| 6| 15|
|07| |29.87| 0.00| 56| 54| 94|33| 4| 10| |29.81| 0.00| 63| 61| 94|22| 12| 22| |29.85| 0.01| 54| 53| 98|00| 6| 15|
|10| |29.96| 0.00| 55| 51| 86|02| 7| 15| |29.86| 0.00| 68| 65| 90|22| 13| 24| |29.91| 0.00| 53| 53| 98|00| 6| 14|
|13| |29.91| 0.00| 60| 44| 55|04| 11| 17| |29.83| 0.00| 74| 67| 78|24| 10| 22| |29.88| 0.00| 53| 52| 98|06| 6| 14|
|16| |29.86| 0.00| 59| 42| 53|00| 5| 13| |29.84| 0.00| 73| 67| 80|22| 5| 13| |29.91| 0.00| 52| 52| 98|04| 5| 12|
|19| |29.89| 0.00| 56| 48| 74|13| 7| 15| |29.85| 0.00| 69| 65| 86|20| 4| 6| |29.92| 0.00| 53| 53| 99|00| 0| 0|
|22| |29.83| 0.00| 53| 50| 90|18| 7| 18| |29.85| 0.03| 68| 66| 93|20| 5| 11| |29.92| 0.00| 53| 53| 99|00| 0| 0|
+--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+
| DEC 31 | | |
| | | |
|01| |29.90| 0.03| 54| 53| 99|00| 0| 0| | |
|04| |29.91| 0.00| 53| 52| 99|02| 5| 13| | |
|07| |29.95| 0.00| 52| 52| 99|00| 5| 13| | |
|10| |30.00| 0.00| 54| 53| 99|06| 5| 14| | |
|13| |29.96| 0.00| 57| 56| 99|22| 5| 11| | |
|16| |29.95| 0.00| 58| 58| 99|22| 6| 14| | |
|19| |29.95| 0.00| 57| 56| 99|18| 6| 13| | |
|22| |29.94| 0.00| 57| 57| 99|18| 10| 18| | |
+--+----+-----+-----+---+---+---+--+---+---+---------------------------------------+---------------------------------------+
WEATHER NOTES SUMMARY BY HOURS
+--+-----------------------------+---------+
Wind Direction: Directions are those from which the wind is blowing, | | Averages | |
indicated in tens of degrees from true North: i.e., 09 for East, 18 for | +----+------+---+---+---+-----+Resultant|
South, 27 for West, and 00 or 36 for North. | | | | | | | | |
Wind Speed: The observed one-minute average speed in miles-per-hour. | | | | T | | | | Wind |
Wind Gust: The maximum instantaneous wind speed for the ten minute-period | | | | e | | % | W +----+----+
preceding the observation. | | | | m | D | | i | D | |
Rainfall Rate: The instantaneous rainfall rate at time of observation, | | S | P | p | e | H | n | i | |
calculated by timing consecutive 0.01" pulses from the electronic rain | | u | r | e | w | u | d | r | |
gauge and interpolating this rate for one hour. | | n | e | r | | m | | e | |
| | s | s | a | P | i | S | c | S |
| H| h | s | t | o | d | p | t | p |
| o| i | u | u | i | i | e | i | e |
| u| n | r | r | n | t | e | o | e |
| r| e | e | e | t | y | d | n | d |
+--+----+------+---+---+---+-----+----+----+
|01| |30.045| 48| 43| 86| 4.7| 26 | 1.2|
|04| |30.054| 47| 43| 86| 5.7| 29 | 1.0|
|07| |30.085| 46| 43| 87| 6.0| 32 | 1.6|
|10| |30.121| 51| 45| 83| 8.6| 33 | 2.0|
|13| |30.059| 56| 46| 71| 8.8| 26 | 1.0|
|16| |30.040| 57| 47| 70| 7.4| 23 | 0.9|
|19| |30.055| 52| 46| 81| 4.2| 19 | 1.3|
|22| |30.056| 50| 45| 86| 4.4| 20 | 1.7|
+--+----+------+---+---+---+-----+----+----+
HOURLY PRECIPITATION (Water Equivalent)
December 2021: KPWR Portsmouth, Virginia
---+-----------------------------------------------------------+-----------------------------------------------------------+---
| | |
D| A.M. Hour Ending at | P.M. Hour Ending at |D
a| | |a
t+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+t
e| 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 |e
---+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+---
01| | | | | | | | | | | | | | | | | | | | | | | | |01
02| | | | | | | | | | | | | | | | | | | | | | | | |02
03| | | | | | | | | | | | | | | | | | | | | | | | |03
04| | | | | | | | | | | | | | | | | | | | | | | | |04
05| | | | | | | | | | | | | | | | | | | | | | | | |05
| | | | | | | | | | | | | | | | | | | | | | | | |
06| | | | | | | | | | | | | | | | | | | | | | | | |06
07| | | | | | | | | | | | | | | | | | | | | | | | |07
08| | | | | | | |0.19|0.09|0.05| | | | | | | | | | | | | | |08
09| | | | | | | | | | | | | | | | | | | | | | | | |09
10| | | | | | | | | | | | | |0.03|0.02| | | | | | | | | |10
| | | | | | | | | | | | | | | | | | | | | | | | |
11| | | | | | | | | | |0.03| | | | | | | | | | |0.25|0.12| |11
12|0.16|0.31| | | | | | | | | | | | | | | | | | | | | | |12
13| | | | | | | | | | | | | | | | | | | | | | | | |13
14| | | | | | | | | | | | | | | | | | | | | | | | |14
15| | | | | | | | | | | | | | | | | | | | | | | | |15
| | | | | | | | | | | | | | | | | | | | | | | | |
16| | | | | | | | | | | | | | | | | | | | | | | | |16
17| | | | | | | | | | | | | | | | | | | | | | | | |17
18| | | | | | | | | | | | | | | | | | | | | | | | |18
19| | | | | | |0.06|0.19|0.06|0.05|0.09|0.07|0.03|0.06|0.05|0.03| | | | | | | | |19
20| | | | | | | | | | | | | | | | | | | | | | | | |20
| | | | | | | | | | | | | | | | | | | | | | | | |
21| | | | | | | | | | | | | | | | | | |0.01|0.02|0.03|0.01| | |21
22| | | | | | |0.01| | | | | | | | | | | | | | | | | |22
23| | | | | | | | | | | | | | | | | | | | | | | | |23
24| | | | | | | | | | | | | | | | | | | | | | | | |24
25| | | | | | | | | | | | | | | | | | | | | | | | |25
| | | | | | | | | | | | | | | | | | | | | | | | |
26| | | | | | | | | | | | | | | | | | | | | | | | |26
27| | | | | | | | | | | | | | | | | | | | | | | | |27
28| | | | | | | | | | | | | | | | | | | | | | | | |28
29| | | | | | | | | | | | | | | | | | | | | |0.03| |0.02|29
30|0.01| | | | | |0.01| | | | | | | | | | | | | | | |0.01| |30
31|0.03|0.02|0.08| | | | | | | | | | | | | | | | | | | | | |31
---+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+---
Sum|0.20|0.33|0.08|0.00|0.00|0.00|0.08|0.38|0.15|0.10|0.12|0.07|0.03|0.09|0.07|0.03|0.00|0.00|0.01|0.02|0.03|0.29|0.13|0.02|Sum
---+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+---
During a frozen precipitation event, hourly precipitation totals may not be recorded. In this case, daily amounts are
typically entered in the last column (hour ending at 12 A.M.)
+------------------------------------------------------+-----------------+------------------------------------------------------------+
| Station: KPWR Portsmouth, Virginia | December 2021 | |
+-------------------------------+----------------------+----+------------+------------+---------------------------+-------------------+
| State: | County: | Latitude: 36° 59' 09" N | Longitude: 76° 33' 00" W | Elevation: 13 ft|
+---+---------------+-----------+---------------------------+-+---------------------+-+---------------------------+-------------------+
| | Temperature | Precipitation | Weather Types | |
| +-----------+---+-----+-----+---+-------------------------+-+-+-+-+-+-+-+-+-+---+-------------------------------------------------+
| | | | | | | | | | | | |D| |B| S | |
| | Calendar | 1 | Calendar | | | | | | | | |u|S|l| k | |
| | Day | 2 | Day | | '-' indicates precip | |H|T|I| | |s|m|o| y | |
| | | A | | | during hour | |v|h|c| | |t|k|w| | |
| +-----+-----+ M +-----+-----+ | | |y|u|e| |G|s| | | C | |
| D | | | | R | S |S +------------+------------+ | |n| |H|l|t|H|s| o | |
| a | M | M | O | a | n |n C| A.M. | P.M. |F|F|d|P|a|a|o|a|n| v | |
| t | a | i | b | i | o |o v+------------+------------+o|o|e|e|i|z|r|z|o| e | |
| e | x | n | s | n | w |w r|M12345678901|N12345678901|g|g|r|l|l|e|m|e|w| r | |
+---+-----+-----+---+-----+-----+---+-------------------------+-+-+-+-+-+-+-+-+-+---+-------------------------------------------------+
| 1| 60| 31| 0| 0.00| 0.0| 0| | | | | | | | | | | |Clr|FROST early then sunny/clear skies cool |
| 2| 68| 46| 0| 0.00| 0.0| 0| | | | | | | | | | | |Clr|continued dry w/ moderating temps sunny/clear/fai|
| 3| 60| 44| 0| 0.00| 0.0| 0| | | | | | | | | | | |Clr|FROPA AM sunny/clear cool |
| 4| 63| 42| 0| 0.00| 0.0| 0| | | | | | | | | | | |PCl| |
| 5| 60| 41| 0| 0.00| 0.0| 0| | | | | | | | | | | |PCl|high pressure ridged down coast partly cloudy co|
| 6| 70| 51| 0| 0.00| 0.0| 0| | |X| | | | | | | | |PCl|partly cloudy warm then cold fropas mild afternoo|
| 7| 66| 40| 0| 0.00| 0.0| 0| | | | | | | | | | | |PCl|FROPA early turning colder breezy partly cloudy |
| 8| 46| 32| 0| 0.33| 0.0| 0| --- | |X| | | | | | | | |Cld|cloudy damp cold light rain moves in clearing eve|
| 9| 45| 31| 0| 0.00| 0.0| 0| | | | | | | | | | | |n/a|FROPA early then sunny & partly cloudy colder FRO|
| 10| 52| 31| 0| 0.05| 0.0| 0| | -- |X| | | | | | | | |Cld|frost early cloudy light winds BR -RA damp cool |
| 11| 74| 52| 0| 0.40| 0.0| 0| - | -- |X| | | | | | | | |PCl|cloudy, increasing winds, RECORD HEAT, SHRA BR |
| 12| 61| 32| 0| 0.47| 0.0| 0|-- | |X| | | | | | | | |PCl|FROPA SHRA BR breezy early frost in evening |
| 13| 54| 28| 0| 0.00| 0.0| 0| | | | | | | | | | | |Clr|FROST sunny clear |
| 14| 56| 31| 0| 0.00| 0.0| 0| | |X| | | | | | | | |Clr|AM frost and GF then mostly sunny/fair onshore fl|
| 15| 67| 44| 0| 0.00| 0.0| 0| | |X| | | | | | | | |Clr|sunny/clear/fair skies ground fog late evening mi|
| 16| 68| 46| 0| 0.00| 0.0| 0| | |X| | | | | | | | |Clr|record heat 68° sunny mild becoming breezy |
| 17| 72| 55| 0| 0.00| 0.0| 0| | |X|X| | | | | | | |PCl|record heat, more moist, SW flow persists, BR +FG|
| 18| 69| 54| 0| T | 0.0| 0| | |X|X| | | | | | | |Cld|mostly cloudy still mildl +FG early BR -SHRA even|
| 19| 67| 40| 0| 0.69| 0.0| 0| ------|---- |X| | | | | | | | |Cld|warm SW early FROPA then N winds with BR RA windy|
| 20| 41| 34| 0| 0.00| 0.0| 0| | | | | | | | | | | |Clr|last full day of fall; sct -FROST early, cold, mo|
| 21| 48| 36| 0| 0.07| 0.0| 0| | ---- |X| | | | | | | | |Cld|cloudy, damp, cold; -DZ-RA br as coastal low deve|
| 22| 50| 41| 0| 0.01| 0.0| 0| - | |X| | | | | | | | |PCl|high pressure bulds in with sunny/clear skies FRO|
| 23| 42| 33| 0| 0.00| 0.0| 0| | | | | | | | | | | |Clr|high pressure N'ly winds cold,dry temps frost in |
| 24| 60| 33| 0| 0.00| 0.0| 0| | | | | | | | | | | |Clr|temps warm to near 60 as SW winds flow in from be|
| 25| 68| 52| 0| 0.00| 0.0| 0| | | | | | | | | | | |Clr|strong SW gusty flow develops pushing temps to th|
| 26| 66| 44| 0| 0.00| 0.0| 0| | | | | | | | | | | |Clr|cold FROPA slowly lowered temps sunny/clear skies|
| 27| 58| 43| 0| 0.00| 0.0| 0| | | | | | | | | | | |PCl|wavering surface front N to S across area; partly|
| 28| 60| 53| 0| 0.00| 0.0| 0| | | | | | | | | | | |Clr|warm front moves D across area; mostly sunny/fair|
| 29| 74| 54| 0| 0.05| 0.0| 0| | - -|X| | | | | | | | |PCl|sunny early, warm fropa, milder, increasing cloud|
| 30| 58| 52| 0| 0.03| 0.0| 0|- - | - |X|X| | | | | | | |Cld|foggy, cloudy, damp, cool with mainly onshore/off|
| 31| 59| 52| 0| 0.13| 0.0| 0|--- | |X|X| | | | | | | |Cld|cloudy mild damp BR +FG SHRA early sprinkles late|
+---+-----+-----+---+-----+-----+---+------------+------------+-+-+-+-+-+-+-+-+-+---+-------------------------------------------------+
|SUM| 1864| 1296|SUM| 2.23| 0.0| | | | | | | | | | | | | |
+---+-----+-----+---+-----+-----+---+-------------------------+-+-+-+-+-+-+-+-+-+---+-------------------------------------------------+
|AVG| 60.1| 41.8| | | | | | | | | | | | | | | | |
+---+-----+-----+---+-----+-----+---+-------------------------+-+-+-+-+-+-+-+-+-+---+-------------------------------------------------+
| GREATEST| 0.87| 0.0| | | | | | | | | | | | | |
+---------+-----+-----+---+-------------------------+-+-+-+-+-+-+-+-+-+---+-------------------------------------------------+
METEOROLOGICAL DATA FOR 2021
KPWR Portsmouth, Virginia
Latitude: 36° 59' 09" N Longitude: 76° 33' 00" W Elevation: 13 ft Time Zone: Eastern
+-------------------------+------+------+------+------+------+------+------+------+------+------+------+------+---------+
| | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | Year|
+-------------------------+------+------+------+------+------+------+------+------+------+------+------+------+---------+
|TEMPERATURE | | | | | | | | | | | | | |
| Average | | | | | | | | | | | | | |
| -Daily Maximum | 47.8| 48.4| 63.6| 71.1| 78.6| 87.2| 90.5| 87.9| 81.4| 74.6| 59.9| 60.1| 70.9|
| -Daily Minimum | 33.9| 34.9| 43.6| 48.7| 55.2| 67.5| 71.0| 72.4| 64.3| 58.7| 40.8| 41.8| 52.7|
| -Monthly | 40.9| 41.6| 53.6| 59.9| 66.9| 77.4| 80.8| 80.1| 72.9| 66.6| 50.4| 51.0| 61.8|
| -Monthly Dewpt. | 34.0| 36.2| 43.1| 48.2| 55.6| 70.4| 73.1| 75.3| 66.7| 60.9| 41.6| 44.9| 54.2|
| Extremes | | | | | | | | | | | | | |
| -Highest | 59.1| 69.3| 82.9| 88.2| 97.8| 95.5| 97.1| 96.2| 89.8| 86.7| 75.1| 74.3| 97.8|
| -Date | 2| 28| 28| 28| 28| 6| 16| 13| 8| 5| 18| 29| MAY 28|
| -Lowest | 26.2| 26.9| 26.3| 34.4| 40.1| 55.0| 62.8| 62.4| 52.8| 44.4| 28.2| 28.4| 26.2|
| -Date | 29| 4| 8| 2| 13| 24| 4| 6| 30| 19| 30| 13| JAN 29|
+-------------------------+------+------+------+------+------+------+------+------+------+------+------+------+---------+
|DEGREE DAYS | | | | | | | | | | | | | |
| Heating Base 65°F | 739| 648| 376| 185| 80| 0| 0| 0| 0| 51| 427| 426| 2932|
| | | | | | | | | | | | | | |
| Cooling Base 65°F | 0| 0| 28| 41| 149| 377| 498| 477| 243| 110| 0| 0| 1923|
+-------------------------+------+------+------+------+------+------+------+------+------+------+------+------+---------+
|SOLAR RADIATION (W/m²) | | | | | | | | | | | | | |
+-------------------------+------+------+------+------+------+------+------+------+------+------+------+------+---------+
|NUMBER OF DAYS | | | | | | | | | | | | | |
| Sunrise to Sunset | | | | | | | | | | | | | |
| -Clear | 14| 8| 14| 15| 17| 17| 12| 12| 21| 11| 23| 13| 177|
| -Partly Cloudy | 6| 6| 11| 15| 12| 10| 16| 13| 6| 10| 3| 10| 118|
| -Cloudy | 11| 14| 6| 0| 2| 3| 3| 5| 3| 10| 4| 7| 68|
| | | | | | | | | | | | | | |
| Precipitation | | | | | | | | | | | | | |
| .01 inches or more | 11| 15| 11| 11| 7| 13| 12| 13| 6| 12| 7| 10| 128|
| | | | | | | | | | | | | | |
| Snow, Ice pellets | | | | | | | | | | | | | |
| 1.0 inches or more | 1| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 1|
| | | | | | | | | | | | | | |
| Thunderstorms | 0| 2| 2| 5| 2| 8| 7| 8| 1| 0| 0| 0| 35|
| | | | | | | | | | | | | | |
| Heavy Fog, visibility| | | | | | | | | | | | | |
| 1/4 mile or less | 0| 0| 1| 0| 0| 0| 0| 0| 0| 0| 0| 4| 5|
| | | | | | | | | | | | | | |
| Temperature | | | | | | | | | | | | | |
| -Maximum | | | | | | | | | | | | | |
| 90°F and above | 0| 0| 0| 0| 6| 14| 20| 16| 1| 0| 0| 0| 57|
| 32°F and below | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|
| -Minimum | | | | | | | | | | | | | |
| 32°F and below | 16| 9| 5| 0| 0| 0| 0| 0| 0| 0| 5| 7| 42|
| 0°F and below | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|
+-------------------------+------+------+------+------+------+------+------+------+------+------+------+------+---------+
|PRESSURE | | | | | | | | | | | | | |
| Average | | | | | | | | | | | | | |
| -Monthly |30.028|30.070|30.152|29.940|30.085|30.023|29.996|30.028|30.005|29.965|30.119|30.063| 30.040|
| Extremes | | | | | | | | | | | | | |
| -Highest | 30.42| 30.63| 30.53| 30.46| 30.51| 30.32| 30.24| 30.18| 30.25| 30.29| 30.54| 30.53| 30.63|
| -Date | 1| 21| 20| 3| 21| 24| 13| 6| 12| 6| 20| 14| FEB 21|
| -Lowest | 29.51| 29.53| 29.55| 29.46| 29.67| 29.66| 29.69| 29.76| 29.57| 29.41| 29.77| 29.59| 29.41|
| -Date | 16| 2| 18| 11| 28| 12| 8| 31| 1| 29| 26| 22| OCT 22|
+-------------------------+------+------+------+------+------+------+------+------+------+------+------+------+---------+
|RELATIVE HUMIDITY (%) | | | | | | | | | | | | | |
| Average | | | | | | | | | | | | | |
| -Monthly | 78.6| 82.9| 72.2| 69.2| 69.0| 81.1| 79.8| 88.1| 83.0| 84.7| 74.2| 81.4| 78.7|
| -Local Time | | | | | | | | | | | | | |
| Hour 01 | 84| 86| 80| 80| 82| 93| 91| 96| 93| 91| 82| 86| 87|
| Hour 07 | 87| 88| 84| 86| 84| 89| 92| 98| 96| 95| 85| 88| 89|
| Hour 13 | 67| 76| 59| 54| 54| 69| 65| 77| 70| 73| 59| 69| 66|
| Hour 19 | 77| 82| 70| 59| 59| 74| 71| 82| 76| 81| 74| 83| 74|
+-------------------------+------+------+------+------+------+------+------+------+------+------+------+------+---------+
|PRECIPITATION | | | | | | | | | | | | | |
| Water Equivalent | | | | | | | | | | | | | |
| -Total | 3.81| 6.52| 2.60| 3.53| 1.23| 8.02| 3.70| 9.72| 2.65| 1.93| 1.31| 2.23| 47.25|
| -Greatest (24 hrs) | 1.61| 1.19| 0.78| 1.59| 0.60| 2.00| 0.93| 2.74| 2.14| 0.75| 0.76| 0.87| 2.74|
| -Date | 25-26| 18-19| 18-19| 14-15| 29| 2-3| 2| 16| 8-9| 28-29| 12| 11-12| AUG 16|
| | | | | | | | | | | | | | |
| Snow, Ice pellets | | | | | | | | | | | | | |
| -Total | 3.4| T| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 3.4|
| -Greatest (24 hrs) | 3.0| T| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 0.0| 3.0|
| -Date | 28| 1| | | | | | | | | | | JAN 28|
+-------------------------+------+------+------+------+------+------+------+------+------+------+------+------+---------+
|WIND | | | | | | | | | | | | | |
| Resultant | | | | | | | | | | | | | |
| -Direction | 326| 3| 75| 275| 20| 191| 212| 186| 155| 355| 330| 266| 298|
| -Speed | 2.9| 3.2| 0.8| 1.5| 0.5| 2.2| 3.0| 1.0| 0.2| 0.7| 2.6| 0.8| 0.6|
| Average Speed | 6.7| 8.9| 8.2| 7.2| 6.2| 5.4| 5.0| 4.2| 5.0| 5.7| 6.4| 6.3| 6.3|
| Maximum Two-minute | | | | | | | | | | | | | |
| Average | | | | | | | | | | | | | |
| -Direction | N| N| N| N| N| N| N| N| N| N| N| N| N|
| -Speed | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0|
| -Date | 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| 1| JAN 1|
| Peak Gust | | | | | | | | | | | | | |
| -Direction | N| SSW| NE| S| NW| SSW| SSE| SW| S| NNE| SW| SSW| SSW|
| -Speed | 35| 54| 48| 47| 35| 31| 37| 32| 34| 34| 36| 34| 52|
| -Date | 29| 22| 19| 27| 1| 22| 8| 30| 1| 10| 18| 6| FEB 22|
+-------------------------+------+------+------+------+------+------+------+------+------+------+------+------+---------+