LOCAL CLIMATOLOGICAL DATA Monthly Summary
May 2011
Station: Portsmouth, Virginia - KPWR Latitude: 36° 48' 04" N Longitude: 76° 19' 37" W Elevation (ground): 20 feet Time Zone: Eastern +--+-------------------------------+----+---------+---------+--+-----------+--------------------+-----------------------------+------+ | | Temperature | |Deg. Days|Precip Ty| | Precip | Pressure | Wind | Sun | | +------+------+------+------+---+ Hu-+----+----+1 fog | S+-----+-----+ Adj. to Sea Level +----+----+---+-------+-------+------+ | | M | M | A | | |mid-| H | C |2 hvy fog| n| | Ice +------+------+------+ Avg| Res|Res| Peak | Minute| Mean | | | a | i | v | | D | ity| e | o |3 thunder| o|Water| plts| | | | | | +---+---+---+---+ | | | x | n | e | | e | | a | o |4 ice plt| w| | | | | | S | S | | S | | S | | I | | D| i | i | r | M | w | M | t | l |5 hail | | E | S | | | M | p | p | | p | | p | | n | | a| m | m | a | e | | e | i | i |6 glaze | C| q | n | M | M | e | e | e | D | e | D | e | D | d | | t| u | u | g | a | P | a | n | n |7 duststm| v| u | o | a | i | a | e | e | i | e | i | e | i | e | | 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 | x | | | | | | | | | | |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| 70.7 | 45.4*| 58.0*| 58.8 | 49| 72| 7| 0|.........| 0| 0.00| 0.0| 30.31| 30.24|30.270| 1.2| 1.2| 53| 19| NE| 0| 0| | |02| 83.2 | 52.6 | 67.9 | 67.9 | 58| 72| 0| 3|.........| 0| 0.00| 0.0| 30.29| 30.12|30.215| 2.4| 2.3|177| 19| S| 0| 0| | |03| 86.3 | 60.3 | 73.3 | 73.2 | 64| 73| 0| 8|.........| 0| 0.00| 0.0| 30.16| 29.98|30.083| 4.5| 4.3|180| 24| S| 0| 0| | |04| 68.6 | 50.3 | 59.4 | 58.6 | 54| 87| 5| 0|..3......| 0| 0.55| 0.0| 30.18| 29.95|30.042| 4.3| 2.9|356| 34| N| 0| 0| | |05| 69.5 | 48.8 | 59.2 | 57.5 | 42| 58| 5| 0|.........| 0| 0.00| 0.0| 30.23| 30.09|30.165| 5.6| 4.0|333| 25| N| 0| 0| | | | | | | | | | | | | | | | | | | | | | | | | | | |06| 73.3 | 46.0 | 59.7 | 59.6 | 50| 71| 5| 0|.........| 0| 0.00| 0.0| 30.11| 29.92|30.022| 3.1| 3.0|189| 22|SSW| 0| 0| | |07| 76.4 | 48.6 | 62.5 | 62.6 | 52| 70| 2| 0|.........| 0| 0.00| 0.0| 29.97| 29.88|29.929| 2.2| 1.1|336| 17| N| 0| 0| | |08| 70.4 | 54.8 | 62.6 | 61.8 | 56| 81| 2| 0|.........| 0| 0.06| 0.0| 29.94| 29.88|29.915| 1.3| 1.1| 32| 19| NE| 0| 0| | |09| 75.5 | 51.4 | 63.5 | 63.5 | 54| 72| 1| 0|.........| 0| 0.00| 0.0| 29.99| 29.91|29.944| 4.2| 3.6| 31| 22| NE| 0| 0| | |10| 71.0 | 49.1 | 60.0 | 61.6 | 50| 69| 5| 0|.........| 0| 0.00| 0.0| 30.01| 29.94|29.981| 3.5| 3.1| 22| 20| N| 0| 0| | | | | | | | | | | | | | | | | | | | | | | | | | | |11| 68.3 | 48.7 | 58.5 | 59.0 | 52| 79| 6| 0|.........| 0| 0.00| 0.0| 30.11| 29.96|30.040| 3.0| 2.9| 52| 19|ENE| 0| 0| | |12| 74.1 | 47.6 | 60.8 | 62.0 | 54| 76| 4| 0|.........| 0| 0.00| 0.0| 30.10| 29.98|30.047| 0.6| 0.5| 50| 11| NE| 0| 0| | |13| 72.1 | 57.3 | 64.7 | 64.4 | 58| 80| 0| 0|.......8.| 0| T | 0.0| 29.99| 29.83|29.907| 0.2| 0.2|153| 17|SSE| 0| 0| | |14| 85.2 | 60.7 | 72.9 | 71.6 | 67| 85| 0| 8|..3....8.| 0| 0.17| 0.0| 29.82| 29.61|29.726| 1.9| 1.6|156| 16|SSE| 0| 0| | |15| 83.8 | 65.8 | 74.8 | 72.5 | 68| 86| 0| 10|.........| 0| 0.10| 0.0| 29.64| 29.53|29.585| 2.6| 2.5|155| 20| W| 0| 0| | | | | | | | | | | | | | | | | | | | | | | | | | | |16| 83.4 | 59.7 | 71.6 | 71.7 | 64| 79| 0| 7|.2.......| 0| T | 0.0| 29.66| 29.55|29.613| 1.9| 1.9|148| 21| SE| 0| 0| | |17| 79.1 | 63.9 | 71.5 | 70.1 | 64| 82| 0| 7|.........| 0| 0.02| 0.0| 29.74| 29.61|29.662| 2.3| 2.1|142| 24| SE| 0| 0| | |18| 82.3 | 59.9 | 71.1 | 67.3 | 63| 87| 0| 6|..3......| 0| 0.32| 0.0| 29.88| 29.74|29.796| 0.6| 0.6|161| 31| S| 0| 0| | |19| 78.4 | 55.1 | 66.8 | 67.1 | 60| 79| 0| 2|.........| 0| 0.00| 0.0| 30.04| 29.88|29.981| 2.0| 1.9|185| 19| S| 0| 0| | |20| 77.4 | 58.9 | 68.2 | 68.8 | 60| 74| 0| 3|.........| 0| 0.00| 0.0| 30.04| 29.95|30.004| 2.4| 1.3|318| 15|WSW| 0| 0| | | | | | | | | | | | | | | | | | | | | | | | | | | |21| 79.4 | 57.8 | 68.6 | 70.1 | 61| 73| 0| 4|.........| 0| 0.00| 0.0| 30.03| 29.95|29.985| 3.0| 2.7| 16| 20| N| 0| 0| | |22| 86.0 | 59.0 | 72.5 | 73.5 | 64| 74| 0| 8|.......8.| 0| 0.00| 0.0| 30.08| 30.01|30.045| 1.9| 1.4|169| 15|SSE| 0| 0| | |23| 88.4 | 68.5 | 78.4 | 77.6 | 72| 83| 0| 14|..3....8.| 0| 0.13| 0.0| 30.06| 29.88|29.977| 3.9| 3.6|175| 23|SSW| 0| 0| | |24| 93.4 | 67.6 | 80.5 | 75.6 | 71| 86| 0| 16|1.3.5..8.| 0| 0.66| 0.0| 29.94| 29.83|29.881| 3.9| 2.9|193| 56|SSE| 0| 0| | |25| 88.4 | 64.9 | 76.7 | 76.3 | 70| 83| 0| 12|..3......| 0| 0.10| 0.0| 29.95| 29.89|29.917| 1.6| 0.7|236| 14| S| 0| 0| | | | | | | | | | | | | | | | | | | | | | | | | | | |26| 92.4 | 71.3 | 81.9 | 81.7 | 72| 74| 0| 17|1......8.| 0| 0.00| 0.0| 29.95| 29.88|29.912| 3.5| 3.3|181| 19| S| 0| 0| | |27| 88.4 | 69.0 | 78.7 | 78.9 | 69| 74| 0| 14|.........| 0| 0.00| 0.0| 30.02| 29.95|29.980| 2.0| 1.8|171| 18| S| 0| 0| | |28| 87.4 | 66.6 | 77.0 | 75.9 | 70| 82| 0| 12|..3......| 0| 0.02| 0.0| 30.08| 29.98|30.013| 1.3| 1.2|164| 20|SSE| 0| 0| | |29| 91.1 | 68.1 | 79.6 | 79.5 | 72| 78| 0| 15|.........| 0| 0.00| 0.0| 30.15| 30.06|30.107| 2.3| 2.2|179| 18| S| 0| 0| | |30| 94.3*| 69.8 | 82.1 | 82.6 | 73| 75| 0| 17|.......8.| 0| 0.00| 0.0| 30.17| 30.09|30.130| 2.1| 1.8|219| 16| S| 0| 0| | | | | | | | | | | | | | | | | | | | | | | | | | | |31| 92.9 | 73.5 | 83.2*| 83.7 | 74| 73| 0| 19|.......8.| 0| 0.00| 0.0| 30.18| 30.10|30.135| 3.4| 3.2| 40| 21| NE| 0| 0| | +--+------+------+------+------+---+----+----+----+---------+--+-----+-----+------+------+------+----+----+---+---+---+---+---+------+ | Sum | Sum |------|------|---|----| Ttl| Ttl| |Total|Total| For the month: | ---- | +------+------+------+------+---+----+----+----+ Number of +-----+-----+------+------+------+----+----+---+---+---+---+---+------+ |2511.1|1821.0|------|------|---|----| 42| 202| Days | 2.13| 0.0| 30.31| 29.53|29.968| 2.5| 0.5|148| 56|SSE| 0| 0| ---- | +------+------+------+------+---+----+----+----+------------|-1.92" or 53% of normal +------+----+----+---+---+---+---+---+------+ | Avg | Avg | Avg | Mean |Avg| Avg|----|----|Precip | Season Ttl| Date | Date |------|----|----|---| Date | Date | Avg | +------+------+------+------+---+----+----+----+ +-----+-----+------+------+------+----+----+---+-------+-------+------+ | 80.8| 58.8| 69.8 | 69.5 | 61|77.1|----|----|>.01 Inch 10|14.43| 19.0| 1 | 15 |------|----|----|---| 24 | 1+ | | + +3.9 +1.5 +2.7 ------+---+----+----+----+------------|-3.87" or 79% 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 |3649| 294|Thunder 7|Precipitation | Snow, Ice Plts | and Date | +--------+---------+--------+--------+----+----+------------+-------+------+---------+-------+-------------+----------------------+ | >90°F | <32°F | <32°F | <0°F |----|----|Heavy Fog 1| 0.75| 24-25| 0.0 | - | 0 | - | +--------+---------+--------+--------+----+----+------------+-------+------+---------+----+--+-------------+----------------------+ | 5 | 0 | 0 | 0 |----|----| Clear 14 Partly Cloudy 17 Cloudy 0 | +--------+---------+--------+--------+----+----+------------------------------------------+ 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. Column 23: Sunshine index is measured in Watts/m^2 and is continuously averaged for 24 hours. Data in columns 4B, 5, 6, 15, 16, 23 are updated continuously, there by achieving a "true" mean.
  OBSERVER NOTES:
    FROPA: 4th, 8th, 19th

Station Records:
6th -TEMPERATURE TIED Minimum 46 [previous 1979]
24th - WIND GUST 56mph [previous 31mph 1988]
24th - TEMPERATURE Maximum 93 [previous 92 1987]
30th - TEMPERATURE TIED Maximum Miinimum 70 [previous 1987] MONTHLY AVERAGE MAXIMUM TEMP OF 80.8 WAS 3.9 ABOVE NORMAL. MONTHLY AVERAGE MINIMUM TEMP OF 58.8 WAS 1.5 ABOVE NORMAL. MONTHLY AVERAGE TEMP OF 69.8 WAS 2.7 ABOVE NORMAL. THE MONTH WAS THE 7TH WARMEST MAY IN THE DATABASE TO MAY 1977. MAXIMUM TEMP: 94 ON THE 30TH MINIMUM TEMP: 45 ON THE 1ST DAYS WITH TEMPERATURES: MAXIMUM >= 90: 5 MAXIMUM <= 32: 0 MINIMUM <= 32: 0 MINIMUM <= 0: 0 HEATING DEGREE DAYS: 195.5 COOLING DEGREE DAYS: 46.0 DAYS WITH HEATING DEGREE DAYS: 11 DAYS WITH COOLING DEGREE DAYS: 20 PRECIP TOTAL OF 2.13" WAS 1.92" BELOW NORMAL ( 53% OF NORMAL). GREATEST DAILY RAINFALL: 0.66" ON THE 24TH GREATEST 24-HOUR RAINFALL: 0.75" ON THE 24TH AND 25TH DAYS WITH MEASUREABLE PRECIP: 10 OR 32.36% AVERAGE DAILY PRECIP: 0.07" NORMAL DAILY PRECIP: 0.13" DAYS WITH PRECIP >= 0.01" 10 DAYS WITH PRECIP >= 0.10" 7 DAYS WITH PRECIP >= 0.50" 2 DAYS WITH PRECIP >= 1.00" 0 DAYS WITH THUNDERSTORMS: 7 NUMBER OF THUNDERSTORMS: 8 DAYS WITH SNOW: 0 SNOWFALL TOTAL: 0.0" SEASONAL SNOWFALL 2010-2011: 19.0" CLOUDY DAYS: 0 PARTLY CLOUDY DAYS: 17 SUNNY/CLEAR DAYS: 14 DAYS WITH F/GF: 2 DAYS WITH DENSE FOG: 1 DAYS WITH FROST: 0 YEAR-TO-DATE YEARLY AVERAGE MAXIMUM TEMP OF 62.4 WAS 0.8 ABOVE NORMAL. YEARLY AVERAGE MINIMUM TEMP OF 42.7 WAS 0.2 ABOVE NORMAL. YEARLY AVERAGE TEMP OF 52.6 WAS 0.6 ABOVE NORMAL. MAXIMUM TEMP: 94 ON MAY 30TH MINIMUM TEMP: 15 ON JANUARY 23RD DAYS WITH TEMPERATURES: MAXIMUM >= 90: 5 MAXIMUM <= 32: 1 MINIMUM <= 32: 41 MINIMUM <= 0: 0 HEATING DEGREE DAYS: 2159.5 COOLING DEGREE DAYS: 284.5 DAYS WITH HEATING DEGREE DAYS: 118 DAYS WITH COOLING DEGREE DAYS: 33 PRECIP TOTAL OF 14.43" WAS 3.87" BELOW NORMAL ( 79% OF NORMAL ). GREATEST DAILY RAINFALL: 1.20" ON MARCH 6TH GREATEST 24-HOUR RAINFALL: 1.64" ON JANUARY 17TH-18TH DAYS WITH MEASUREABLE PRECIP: 56 OF 151 OR 37.09% AVERAGE DAILY PRECIP: 0.10" NORMAL DAILY PRECIP: 0.12" DAYS WITH PRECIP >= 0.01" 56 DAYS WITH PRECIP >= 0.10" 30 DAYS WITH PRECIP >= 0.50" 12 DAYS WITH PRECIP >= 1.00" 3 DAYS WITH THUNDERSTORMS: 12 NUMBER OF THUNDERSTORMS: 14 DAYS WITH SNOW (calendar year 2011): 5 SNOWFALL TOTAL (calendar year 2011): 3.6" SEASONAL SNOW 2010-2011 (beginning December 2010): 19.0" CLOUDY DAYS: 23 PARTLY CLOUDY DAYS: 72 SUNNY/CLEAR DAYS: 56 DAYS WITH F/GF: 29 DAYS WITH DENSE FOG: 01 DAYS WITH FROST: 22
OBSERVATIONS AT 3-HOUR INTERVALS
May 2011: Portsmouth, Virginia - KPWR
+--+----+-----+-----+---+---+---+----------+----+-----+-----+---+---+---+----------+----+-----+-----+---+---+---+----------+ | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 | +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | MAY 1 | MAY 2 | MAY 3 | | | | | |01| |30.25| 0.00| 52| 49| 88|13| 0| 4| |30.28| 0.00| 54| 49| 82|18| 0| 6| |30.15| 0.00| 65| 59| 81|20| 4| 16| |04| |30.24| 0.00| 48| 45| 92|00| 0| 0| |30.24| 0.00| 53| 49| 88|15| 0| 4| |30.12| 0.00| 61| 58| 88|20| 0| 7| |07| |30.28| 0.00| 46| 44| 94|00| 0| 0| |30.28| 0.00| 54| 51| 91|15| 0| 5| |30.15| 0.00| 61| 59| 91|18| 0| 11| |10| |30.30| 0.00| 63| 51| 66|15| 0| 10| |30.27| 0.00| 69| 56| 65|15| 4| 11| |30.15| 0.00| 74| 65| 72|18| 6| 19| |13| |30.27| 0.00| 68| 51| 54|04| 4| 11| |30.23| 0.00| 78| 64| 62|20| 5| 15| |30.11| 0.00| 82| 68| 63|18| 7| 21| |16| |30.27| 0.00| 70| 52| 53|06| 5| 14| |30.16| 0.00| 83| 67| 58|18| 5| 18| |30.02| 0.00| 86| 70| 59|20| 6| 19| |19| |30.24| 0.00| 66| 51| 58|15| 0| 11| |30.12| 0.00| 79| 63| 57|18| 5| 17| |29.98| 0.00| 82| 67| 61|15| 5| 15| |22| |30.28| 0.00| 57| 50| 76|15| 0| 10| |30.17| 0.00| 70| 60| 72|18| 0| 7| |30.00| 0.00| 72| 64| 77|15| 4| 11| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | MAY 4 | MAY 5 | MAY 6 | | | | | |01| |29.99| 0.00| 67| 62| 84|18| 4| 14| |30.19| 0.00| 53| 43| 68|33| 5| 15| |30.11| 0.00| 49| 42| 76|15| 0| 5| |04| |29.97| 0.00| 65| 62| 90|18| 4| 12| |30.20| 0.00| 50| 41| 71|00| 6| 16| |30.09| 0.00| 47| 43| 85|18| 0| 10| |07| |29.95| 0.00| 65| 63| 93|18| 0| 14| |30.22| 0.00| 49| 41| 74|27| 5| 19| |30.09| 0.00| 47| 45| 92|18| 0| 12| |10| |30.03| 0.03| 53| 52| 94|00| 10| 27| |30.22| 0.00| 57| 45| 64|00| 6| 19| |30.08| 0.00| 63| 54| 72|18| 6| 19| |13| |30.04| 0.00| 52| 51| 95|00| 6| 18| |30.18| 0.00| 62| 42| 48|00| 7| 21| |30.02| 0.00| 71| 54| 54|18| 7| 20| |16| |30.08| 0.00| 54| 49| 85|00| 10| 22| |30.11| 0.00| 66| 43| 43|00| 6| 18| |29.92| 0.00| 72| 53| 51|18| 5| 20| |19| |30.09| 0.00| 58| 48| 69|33| 6| 16| |30.09| 0.00| 66| 42| 42|24| 5| 16| |29.93| 0.00| 68| 53| 60|20| 5| 20| |22| |30.14| 0.00| 52| 48| 85|31| 0| 4| |30.12| 0.00| 54| 42| 64|15| 0| 4| |29.96| 0.00| 57| 52| 82|18| 0| 6| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | MAY 7 | MAY 8 | MAY 9 | | | | | |01| |29.96| 0.00| 53| 50| 89|18| 0| 7| |29.94| 0.00| 62| 54| 75|04| 0| 6| |29.93| 0.00| 54| 52| 93|00| 0| 0| |04| |29.94| 0.00| 51| 49| 94|24| 0| 7| |29.91| 0.00| 60| 54| 82|04| 0| 6| |29.93| 0.00| 52| 50| 95|06| 0| 5| |07| |29.95| 0.00| 49| 48| 96|33| 0| 5| |29.91| 0.00| 58| 54| 87|00| 0| 0| |29.97| 0.00| 53| 52| 97|00| 0| 0| |10| |29.96| 0.00| 65| 51| 61|00| 5| 16| |29.92| 0.02| 60| 58| 95|15| 0| 5| |29.98| 0.00| 69| 58| 67|00| 5| 14| |13| |29.93| 0.00| 70| 52| 53|04| 5| 16| |29.91| 0.00| 61| 58| 90|33| 4| 10| |29.93| 0.00| 75| 57| 53|00| 6| 17| |16| |29.89| 0.00| 74| 53| 48|24| 5| 17| |29.88| 0.00| 68| 61| 77|04| 4| 12| |29.91| 0.00| 73| 57| 56|06| 10| 19| |19| |29.89| 0.00| 74| 54| 50|31| 0| 6| |29.91| 0.01| 67| 56| 67|04| 5| 13| |29.93| 0.00| 69| 53| 58|04| 10| 20| |22| |29.92| 0.00| 62| 53| 70|13| 0| 10| |29.94| 0.00| 59| 54| 83|00| 0| 0| |29.96| 0.00| 62| 54| 76|00| 0| 0| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | MAY 10 | MAY 11 | MAY 12 | | | | | |01| |29.96| 0.00| 55| 53| 91|00| 0| 0| |29.99| 0.00| 54| 50| 87|00| 0| 0| |30.09| 0.00| 52| 49| 89|00| 0| 0| |04| |29.96| 0.00| 51| 49| 93|00| 0| 0| |29.97| 0.00| 50| 48| 92|13| 0| 5| |30.09| 0.00| 49| 47| 93|00| 0| 0| |07| |30.00| 0.00| 51| 50| 96|00| 0| 0| |30.04| 0.00| 50| 48| 95|22| 0| 5| |30.09| 0.00| 49| 47| 95|00| 0| 0| |10| |30.01| 0.00| 66| 54| 65|00| 7| 16| |30.07| 0.00| 62| 55| 79|06| 4| 12| |30.09| 0.00| 66| 55| 69|06| 1| 7| |13| |30.00| 0.00| 69| 48| 46|00| 7| 20| |30.06| 0.00| 66| 53| 63|04| 7| 18| |30.06| 0.00| 73| 58| 60|02| 1| 6| |16| |29.96| 0.00| 70| 50| 49|04| 7| 18| |30.03| 0.00| 68| 54| 62|06| 6| 16| |30.00| 0.00| 74| 60| 63|04| 2| 7| |19| |29.97| 0.00| 67| 48| 49|04| 6| 16| |30.06| 0.00| 65| 55| 70|04| 5| 16| |29.98| 0.00| 71| 58| 64|15| 0| 6| |22| |30.01| 0.00| 59| 52| 75|06| 0| 6| |30.10| 0.00| 56| 51| 82|06| 0| 14| |30.00| 0.00| 61| 54| 77|15| 0| 8| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | MAY 13 | MAY 14 | MAY 15 | | | | | |01| |29.99| 0.00| 60| 54| 80|15| 0| 5| |29.82| 0.00| 63| 58| 85|15| 0| 10| |29.64| 0.00| 69| 64| 85|04| 0| 10| |04| |29.95| 0.00| 57| 53| 84|15| 0| 3| |29.79| 0.00| 63| 60| 91|15| 0| 12| |29.61| 0.00| 67| 65| 92|11| 0| 7| |07| |29.95| 0.00| 59| 55| 87|15| 0| 4| |29.77| 0.00| 61| 60| 97|18| 0| 10| |29.62| 0.07| 66| 65| 96|18| 0| 7| |10| |29.94| 0.00| 69| 61| 77|13| 0| 10| |29.78| 0.00| 69| 69| 97|15| 4| 12| |29.62| 0.00| 72| 70| 93|15| 4| 11| |13| |29.91| 0.00| 72| 64| 77|18| 0| 7| |29.74| 0.00| 81| 74| 79|15| 4| 12| |29.59| 0.00| 80| 71| 73|15| 5| 17| |16| |29.86| 0.00| 68| 61| 78|15| 0| 11| |29.65| 0.00| 85| 76| 74|15| 4| 16| |29.53| 0.00| 80| 70| 72|15| 5| 17| |19| |29.84| 0.00| 66| 58| 75|15| 0| 10| |29.61| 0.00| 78| 72| 80|15| 4| 15| |29.53| 0.00| 74| 69| 86|13| 4| 17| |22| |29.85| 0.00| 63| 57| 81|18| 0| 11| |29.67| 0.00| 72| 64| 76|00| 4| 10| |29.56| 0.00| 70| 67| 89|13| 0| 7| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | MAY 16 | MAY 17 | MAY 18 | | | | | |01| |29.56| 0.00| 68| 64| 88|24| 0| 11| |29.65| 0.00| 67| 63| 89|15| 0| 10| |29.75| 0.00| 63| 61| 93|15| 0| 6| |04| |29.56| 0.00| 63| 62| 95|29| 0| 11| |29.61| 0.00| 65| 62| 89|11| 0| 5| |29.75| 0.00| 60| 59| 94|13| 0| 6| |07| |29.61| 0.00| 60| 59| 97|00| 0| 0| |29.63| 0.01| 64| 62| 94|11| 0| 5| |29.79| 0.00| 61| 60| 96|00| 0| 0| |10| |29.63| 0.00| 72| 67| 86|20| 0| 6| |29.66| 0.00| 73| 65| 75|15| 4| 14| |29.81| 0.01| 70| 67| 89|18| 0| 10| |13| |29.63| 0.00| 82| 68| 62|15| 4| 15| |29.67| 0.00| 79| 65| 63|13| 5| 21| |29.80| 0.01| 80| 69| 67|15| 0| 11| |16| |29.61| 0.00| 83| 64| 52|15| 5| 18| |29.65| 0.00| 76| 67| 76|04| 4| 15| |29.81| 0.14| 69| 60| 74|18| 6| 31| |19| |29.63| 0.00| 76| 65| 69|15| 5| 19| |29.67| 0.00| 74| 65| 74|15| 4| 16| |29.81| 0.00| 67| 64| 91|09| 0| 10| |22| |29.65| 0.00| 69| 64| 84|15| 0| 10| |29.71| 0.00| 67| 62| 85|18| 0| 14| |29.86| 0.00| 64| 62| 95|09| 0| 5| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+
MAXIMUM SHORT DURATION PRECIPITATION
+------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+ | Time Period (minutes) | 5 | 10 | 15 | 20 | 30 | 45 | 60 | 80 | 100 | 120 | 150 | 180 | +------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+ | Precipitation | 0.04 | 0.08 | 0.11 | 0.15 | 0.22 | 0.33 | 0.44 | 0.44 | 0.44 | 0.44 | 0.47 | 0.53 | +------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+ | Ended: Date | 04 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 04 | 04 | +------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+ | Ended: Time | 1004 | 1609 | 1613 | 1619 | 1629 | 1644 | 1700 | 1700 | 1700 | 1700 | 1100 | 1100 | +------------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+ 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
May 2011: Portsmouth, Virginia - KPWR
+--+----+-----+-----+---+---+---+----------+----+-----+-----+---+---+---+----------+----+-----+-----+---+---+---+----------+ | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 | +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | MAY 19 | MAY 20 | MAY 21 | | | | | |01| |29.88| 0.00| 60| 58| 93|15| 0| 6| |30.03| 0.00| 63| 59| 86|00| 0| 0| |29.98| 0.00| 62| 58| 88|00| 0| 0| |04| |29.91| 0.00| 57| 56| 94|18| 0| 6| |30.02| 0.00| 60| 57| 92|18| 0| 6| |29.95| 0.00| 59| 57| 93|27| 0| 4| |07| |29.97| 0.00| 56| 54| 95|18| 0| 6| |30.04| 0.00| 60| 57| 90|24| 0| 7| |29.98| 0.00| 59| 58| 96|27| 0| 6| |10| |30.01| 0.00| 68| 62| 81|24| 4| 15| |30.04| 0.00| 74| 61| 64|24| 4| 12| |30.01| 0.00| 74| 61| 64|00| 7| 20| |13| |30.02| 0.00| 76| 64| 65|18| 5| 18| |30.00| 0.00| 77| 60| 56|24| 5| 15| |29.98| 0.00| 77| 62| 60|00| 6| 16| |16| |30.00| 0.00| 77| 64| 64|18| 4| 15| |29.97| 0.00| 77| 62| 60|00| 5| 15| |29.98| 0.00| 78| 63| 60|04| 7| 20| |19| |30.00| 0.00| 75| 63| 65|18| 4| 12| |29.95| 0.00| 74| 61| 63|00| 4| 11| |29.98| 0.00| 77| 62| 60|04| 5| 14| |22| |30.03| 0.00| 67| 60| 79|18| 0| 4| |29.99| 0.00| 66| 60| 81|00| 0| 0| |30.01| 0.00| 69| 61| 75|11| 0| 5| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | MAY 22 | MAY 23 | MAY 24 | | | | | |01| |30.03| 0.00| 64| 60| 88|18| 0| 5| |30.06| 0.00| 70| 65| 85|15| 4| 11| |29.92| 0.00| 70| 69| 96|18| 4| 14| |04| |30.01| 0.00| 61| 59| 93|18| 0| 4| |30.03| 0.00| 69| 67| 93|13| 4| 12| |29.89| 0.00| 69| 68| 97|18| 4| 12| |07| |30.07| 0.00| 60| 59| 96|18| 0| 4| |30.02| 0.00| 70| 68| 95|15| 4| 12| |29.90| 0.00| 71| 71| 98|18| 4| 11| |10| |30.08| 0.00| 77| 67| 72|20| 4| 7| |30.01| 0.00| 81| 74| 80|15| 4| 15| |29.89| 0.00| 81| 75| 81|18| 6| 16| |13| |30.07| 0.00| 83| 66| 56|15| 0| 6| |30.01| 0.00| 80| 75| 85|20| 5| 17| |29.88| 0.00| 89| 76| 67|15| 4| 17| |16| |30.04| 0.00| 86| 69| 57|13| 4| 12| |29.92| 0.00| 88| 75| 64|20| 6| 23| |29.84| 0.00| 93| 75| 55|24| 6| 19| |19| |30.02| 0.00| 82| 68| 61|15| 5| 15| |29.89| 0.00| 87| 75| 68|18| 5| 13| |29.85| 0.00| 71| 69| 95|18| 0| 6| |22| |30.05| 0.00| 72| 65| 77|15| 4| 12| |29.92| 0.00| 74| 72| 95|18| 0| 11| |29.90| 0.00| 69| 67| 94|24| 0| 6| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | MAY 25 | MAY 26 | MAY 27 | | | | | |01| |29.91| 0.01| 67| 66| 97|00| 0| 6| |29.89| 0.00| 74| 72| 93|13| 0| 10| |29.95| 0.00| 73| 68| 83|20| 5| 17| |04| |29.90| 0.05| 66| 65| 98|15| 0| 7| |29.89| 0.00| 73| 71| 96|18| 0| 7| |29.98| 0.00| 71| 68| 90|18| 4| 11| |07| |29.95| 0.00| 66| 65| 99|24| 0| 7| |29.94| 0.00| 72| 71| 95|18| 0| 10| |30.00| 0.00| 70| 68| 95|15| 0| 7| |10| |29.95| 0.00| 75| 72| 90|18| 4| 14| |29.94| 0.00| 83| 72| 68|18| 6| 16| |30.01| 0.00| 81| 72| 74|13| 2| 12| |13| |29.93| 0.00| 84| 74| 71|22| 4| 10| |29.92| 0.00| 91| 75| 60|18| 5| 17| |29.99| 0.00| 88| 73| 61|18| 2| 12| |16| |29.91| 0.00| 88| 73| 61|00| 4| 11| |29.90| 0.00| 91| 74| 58|18| 6| 18| |29.95| 0.00| 88| 70| 54|13| 2| 17| |19| |29.89| 0.00| 85| 75| 72|04| 4| 12| |29.88| 0.00| 89| 71| 57|18| 4| 15| |29.95| 0.00| 83| 68| 61|15| 2| 11| |22| |29.92| 0.00| 77| 72| 86|18| 0| 4| |29.92| 0.00| 79| 69| 72|18| 4| 16| |29.99| 0.00| 75| 64| 70|24| 0| 4| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | MAY 28 | MAY 29 | MAY 30 | | | | | |01| |29.99| 0.00| 70| 67| 89|13| 0| 5| |30.06| 0.00| 71| 67| 89|15| 0| 6| |30.15| 0.00| 74| 70| 87|18| 0| 10| |04| |29.98| 0.00| 68| 65| 92|00| 0| 0| |30.07| 0.00| 69| 67| 95|15| 0| 6| |30.11| 0.00| 71| 69| 91|18| 4| 15| |07| |30.02| 0.00| 69| 68| 96|18| 0| 1| |30.12| 0.00| 70| 69| 97|15| 0| 6| |30.15| 0.00| 71| 69| 95|18| 0| 10| |10| |30.06| 0.02| 75| 73| 91|15| 0| 10| |30.15| 0.00| 81| 74| 79|18| 5| 15| |30.17| 0.00| 82| 76| 81|27| 4| 12| |13| |30.01| 0.00| 85| 70| 61|15| 4| 14| |30.13| 0.00| 88| 74| 63|18| 4| 18| |30.15| 0.00| 90| 78| 68|24| 4| 15| |16| |29.99| 0.00| 87| 72| 60|15| 4| 20| |30.08| 0.00| 90| 74| 60|20| 4| 15| |30.10| 0.00| 94| 78| 61|24| 4| 10| |19| |30.00| 0.00| 79| 71| 78|18| 0| 10| |30.08| 0.00| 86| 73| 65|18| 0| 7| |30.09| 0.00| 93| 74| 54|33| 0| 10| |22| |30.05| 0.00| 75| 70| 86|15| 0| 6| |30.15| 0.00| 79| 72| 80|13| 0| 10| |30.13| 0.00| 83| 73| 71|00| 0| 0| +--+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+----+-----+-----+---+---+---+--+---+---+ | MAY 31 | | | | | | | |01| |30.12| 0.00| 78| 73| 84|00| 0| 0| | | |04| |30.11| 0.00| 75| 72| 92|00| 0| 0| | | |07| |30.13| 0.00| 75| 73| 93|00| 0| 0| | | |10| |30.14| 0.00| 88| 76| 67|00| 5| 14| | | |13| |30.14| 0.00| 92| 77| 62|04| 7| 17| | | |16| |30.14| 0.00| 92| 73| 53|04| 10| 20| | | |19| |30.13| 0.00| 88| 74| 64|04| 4| 15| | | |22| |30.18| 0.00| 78| 71| 79|15| 0| 4| | | +--+----+-----+-----+---+---+---+--+---+---+---------------------------------------+---------------------------------------+
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| |29.984| 64| 60| 86| 0.8| 19 | 0.5| |04| |29.970| 61| 59| 91| 0.8| 17 | 0.4| |07| |29.994| 61| 59| 94| 0.4| 20 | 0.3| |10| |30.008| 72| 64| 76| 4.0| 17 | 0.1| |13| |29.988| 78| 65| 64| 4.6| 10 | 0.7| |16| |29.952| 80| 65| 61| 5.5| 09 | 1.5| |19| |29.947| 76| 63| 66| 3.5| 10 | 1.1| |22| |29.985| 68| 61| 80| 0.5| 16 | 0.2| +--+----+------+---+---+---+-----+----+----+
HOURLY PRECIPITATION (Water Equivalent)
May 2011: Portsmouth, Virginia - KPWR
---+-----------------------------------------------------------+-----------------------------------------------------------+--- | | | 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| | | | | | | | | |0.12|0.03|0.37|0.02| |0.01| | | | | | | | | |04 05| | | | | | | | | | | | | | | | | | | | | | | | |05 | | | | | | | | | | | | | | | | | | | | | | | | | 06| | | | | | | | | | | | | | | | | | | | | | | | |06 07| | | | | | | | | | | | | | | | | | | | | | | | |07 08| | | | | | | | | |0.03|0.02| | | | | | | | |0.01| | | | |08 09| | | | | | | | | | | | | | | | | | | | | | | | |09 10| | | | | | | | | | | | | | | | | | | | | | | | |10 | | | | | | | | | | | | | | | | | | | | | | | | | 11| | | | | | | | | | | | | | | | | | | | | | | | |11 12| | | | | | | | | | | | | | | | | | | | | | | | |12 13| | | | | | | | | | | | | | | | | | | | | | | | |13 14| | | | | |0.03|0.14| | | | | | | | | | | | | | | | | |14 15| | | | | | | |0.07| | | | | | | | | |0.03| | | | | | |15 | | | | | | | | | | | | | | | | | | | | | | | | | 16| | | | | | | | | | | | | | | | | | | | | | | | |16 17| | | | | | | |0.01| | | | | | |0.01| | | | | | | | | |17 18| | | | | | | | | | |0.01| | |0.01| | |0.14|0.16| | | | | | |18 19| | | | | | | | | | | | | | | | | | | | | | | | |19 20| | | | | | | | | | | | | | | | | | | | | | | | |20 | | | | | | | | | | | | | | | | | | | | | | | | | 21| | | | | | | | | | | | | | | | | | | | | | | | |21 22| | | | | | | | | | | | | | | | | | | | | | | | |22 23| | | | | | | | | | | | | | | | | | | | |0.02|0.11| | |23 24| | | |0.01| | | | | | | | | | | | | |0.43|0.01| | | | |0.21|24 25| |0.01|0.01| |0.05|0.03| | | | | | | | | | | | | | | | | | |25 | | | | | | | | | | | | | | | | | | | | | | | | | 26| | | | | | | | | | | | | | | | | | | | | | | | |26 27| | | | | | | | | | | | | | | | | | | | | | | | |27 28| | | | | | | | | | |0.02| | | | | | | | | | | | | |28 29| | | | | | | | | | | | | | | | | | | | | | | | |29 30| | | | | | | | | | | | | | | | | | | | | | | | |30 31| | | | | | | | | | | | | | | | | | | | | | | | |31 ---+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+--- Sum| |0.01|0.01|0.01|0.05|0.06|0.14|0.08|0.00|0.15|0.08|0.37|0.02|0.01|0.02|0.00|0.14|0.62|0.01|0.01|0.02|0.11|0.00|0.21|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.)