SUN, JUN 01, 1997 8:10 AM EDT ------------------------------------------------------------------- MONTHLY SUMMARY OF CLIMATOLOGICAL DATA - PORTSMOUTH, VIRGINIA Portsmouth Weather Records Service Portsmouth, Virginia 23702-2017 (3 miles south / West Cradock Section) ------------------------------------------------------------------- Monthly summary of Local Climatological Data for Portsmouth, Virginia, West Cradock Section, during the month of May 1997. Time is DST. ------------------------------------------------------------------------ D HT DN LT DN MT DN HDD CDD PREC WD WS SC WXR TYPE/REMARKS ------------------------------------------------------------------------ 1 83 +7 56 +3 69.5 +5 4.5 0.35 NW 34 PC BR TSRA FROPA 2 72 -2 53 +1 62.5 -1 2.5 SSE23 PC PLEASANT 3 75 0 54 +1 64.5 +1 0.5 0.62 SW 51 PC TSRA FROPA 4 67 -6 55 +1 61.0 -2 4.0 NNW29 PC BREEZY 5 71 -1 46 -8 58.5 -4 6.5 S 21 SU PLEASANT 6 77 +1 55 +1 66.0 +1 1.0 0.03 WNW32 PC SHRA FROPA 7 71 -3 52 -2 61.5 -2 3.5 NW 24 SU 8 72 -2 51 -3 61.5 -2 3.5 S 23 PC 9 80 +6 60 +7 70.0 +6 5.0 T N 40 PC SHRA FROPA 10 63 -13 50 -4 56.5 -9 8.5 N 24 PC BREEZY COOL 11 71 -7 43 -12 57.0 -10 8.0 N 20 SU PLEASANT 12 79 +1 52 -5 65.5 -2 0.5 W 31 PC BREEZY MILD 13 67 -11 53 -4 60.0 -7 5.0 0.19 WSW24 PC SHRA BR FROPA 14 73 -3 48 -10 60.5 -6 4.5 WSW27 -PC PLEASANT 15 81 +4 59 +2 70.0 +3 5.0 NNW27 PC DST LTG FROPA 16 69 -8 49 -7 59.0 -7 6.0 NNW34 SU COOLER 17 78 0 46 -11 62.0 -6 3.0 SW 27 SU 18 89 +8 55 -3 72.0 +2 7.0 SSW24 SU WARM BREEZY 19 92 +13 67 +8 79.5 +10 14.5 SW 27 SU -H QUITE WARM 20 82 +6 64 +4 73.0 +5 8.0 T NE 23 PC -SHRA FROPA -H 21 70 -9 59 -1 64.5 -5 0.5 E 24 PC COOLER 22 67 -11 53 -5 60.0 -8 5.0 N 24 SU PLEASANT 23 73 -9 50 -9 61.5 -9 3.5 SSW16 SU PLEASANT 24 86 +5 56 -6 71.0 -1 6.0 WSW20 SU H- WARMER 25 79 -1 67 +6 73.0 +3 8.0 0.02 W 29 PC -H SHRA BREEZY 26 74 -4 57 -4 65.5 -4 0.5 0.55 W 25 C SHRA DZ BR FROPA 27 64 -12 54 -5 59.0 -8 6.0 T ENE24 PC BR(AM) -SHRA 28 64 -13 51 -8 57.5 -11 7.5 SSE23 SU PLEASANT 29 71 -10 49 -12 60.0 -11 5.0 SSE22 -PC PLEASANT 30 73 -8 57 -5 65.0 -7 NE 15 PC -BR(AM) 31 78 -6 62 -1 70.0 -3 5.0 NE 15 PC -BR(AM) SSE15 ------------------------------------------------------------------------ SUMMARY OF MAY 1997: TEMPERATURE: Monthly mean: High = 74.5 Low = 54.3 Mean = 64.4 Departure < Normal: High = - 2.8 Low = - 2.9 Mean = - 2.9 Degree Days: Heating = 82.5 Cooling = 65.0 Number of Days Using: Heating = 18 Cooling = 12 Days with maximum temperature >= 90: 1 Days with maximum temperature <= 32: 0 Days with minimum temperature <= 32: 0 Days with minimum temperature <= 0: 0 PRECIPITATION: Total month = 1.76" Departure < Normal = - 2.23" Normal month (to date) 3.99" or 44% Average daily = 0.06" Normal daily = 0.13" Number of days with measurable precipitation = 6 Year-to-date = 13.71" Departure = - 5.53" or 71% of normal Maximum for May = 8.06" in 1988 --> (Since Minimum for May = 1.02" in 1986 --> 1977) Number of days with 0.01" or more: 6 Snowfall Number of days with 0.10" or more: 4 MAY total = 0.00" Number of days with 0.50" or more: 2 MAY max = 0.00" Number of days with 1.00" or more: 0 DAILY EXTREMES: Low temperature = 43 on the 11th High temperature = 92 on the 19th Maximum daily precipitation = 0.62" on the 3rd Maximum 24-hour rainfall = 0.62" on the 3rd Maximum wind gust = SW 51 mph on the 3rd Maximum barometric pressure = 30.448" on the 5th Minimum barometric pressure = 29.600" on the 1st NUMBER OF: Days Cloudy: 1 Days with thunderstorms: 2 Days Partly Cloudy: 19 # of Thunderstorms: 2 Days Clear/Sunny: 11 Days with some type of snowfall: 0 Days with Fog/Ground Fog: 6 Days with Dense Fog: 0 Days with Frost: 0 ------------------------------------------------------------------ YEAR-TO-DATE: (through May 30th, 1997) Temperatures Degree Days Precipitation Mean maximum: 61.2 (-0.1) Heating: Aqueous: 13.71" (DEP - 5.53") Mean minimum: 42.9 (+1.1) 2042.0 Maximum monthly: 3.17"/FEB.& MAR. Mean monthly: 52.1 (+0.5) Cooling: Minimum monthly: 1.76"/MAR. 87.0 Highest: 92, May 19th Snowfall: 0.10" Lowest: 13, January 19 Maximum daily: 0.10"/JAN.11 Days with max temperature >= 90: 1 Maximum monthly: 0.10"/JAN. Days with max temperature <= 32: 2 Seasonal total: 0.10" Days with min temperature <= 32: 21 Days with some type of Days with temperature <= 0: 0 snowfall: 7 Days with measurable Number of: precipitation: 49 or 32.5% Days using Heating: 132 Days using Cooling: 17 Days with thunderstorms: 7 Days Cloudy: 19 Number of thunderstorms: 7 Days Partly Cloudy: 90 Days Clear/Sunny: 42 Greatest 24-hour period Days with fog/ground fog: 54 rainfall: 1.06"/APR. 28-29th Wind (Highest Gust): SW 56 miles per hour, March 29th Barometer: Highest 30.670" on February 17th Lowest: 29.412" on April 24th ------------------------------------------------------------------ METAR DENOTATIONS: BC Patches BL Blowing BR Fog with visibilites > 5/8 but <=6 statute miles and below to 5/8 mile DU Dust (widespread) DS Duststorm DZ Drizzle FC Funnel Cloud FG Fog with visibility <= 5/8 statute miles FU Smoke FZDZ Freezing drizzle FZRA Freezing rain FZFG Freezing fog GR Hail GS Small hail HZ Haze IC Ice crystals PE Ice pellets PY Spray RA Rain SA Sand SS Sandstorm PO Sand or dust whirls SG Snow granules SH Shower SHRA Shower of rain SHSN Shower of snow SHPE Shower of ice pellets SHGR Shower with hail SHGS Shower with small hail SM Statute miles SN Snow SQ Squalls TC+ Tornado/waterspout TS Thunderstorm TSGR Thunderstorm with hail TSGS Thunderstorm with small hail TSPE Thunderstorm with ice pellets TSRA Thunderstorm with rain TSSN Thunderstorm with snow UP Unknown precipitation VA Volcanic ash VC Vicinity VV Used for obscurred sky METAR Qualifiers: (now placed in FRONT of code) - Light + Heavy DR Low drifting M Below (as in -x.x degrees) MI Shallow PR Partial ------------------------------------------------------------------ PWRS DENOTATIONS: SU/CL = Clear sky; PC = Partly cloudy sky; C = cloudy sky; NA, not available; NR, not recorded; TEMP, temperature; MAX, maximum; MIN, minimum; T, trace of precipitation; INOP, inoperative equipment; MPH, miles per hour; DN, departure from normal; DEP, departure; YR, year; NORM, normal; DST LTG, distant lightning; FROP or FROPA, frontal passage; AM morning; AFT afternoon hours; EVE evening hours; PM evening hours; E estimated; VBL, variable wind directions ------------------------------------------------------------------ COLUMN DENOTATIONS: D Date PREC Precipitation HT High Temperature WS Maximum Wind Speed (Gust) LT Low Temperature WD Direction of Maximum Wind Gust MT Mean Temperature HB High Barometer Reading (Inches) DN Departure from Normal LB Low Barometer Reading (Inches) SC Dominant Daily Sky Cover HDD Heating Degree Days WXR TYPES Observed Weather CDD Cooling Degree Days Conditions and Remarks ------------------------------------------------------------------ NOTES: All temperatures are in degrees fahrenheit. All precipita- tion measurements are in inches. All wind speeds are in miles per hour. ------------------------------------------------------------------