----------------------------------------------------------------------------- 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 April 1996. Time is EST/EDT. ----------------------------------------------------------------------------- D HT DN LT DN MT DN HDD CDD PREC WD WS SC WXR TYPE/REMARKS ----------------------------------------------------------------------------- 1 72 +5 50 +6 61.0 +5 4.0 0.61 NNW23 PC R F RW FROPA 2 56 -12 40 -4 48.0 -8 17.0 0.02 NNW32 PC RW (AM) WINDY 3 73 +6 37 -9 55.0 -1 10.0 WSW26 SU 4 83 +14 56 +8 69.5 +11 4.5 SW 27 SU 5 67 0 45 -2 56.0 -1 9.0 N 28 PC FROPA (AM) 6 48 -16 38 -7 43.0 -11 22.0 0.89 ENE21 C R F FROPA COLD 7 52 -12 39 -4 45.5 -8 19.5 N 22 PC 8 59 -7 35 -10 47.0 -9 18.0 0.03 SSW22 PC K-(AM) R-(EVENING) 9 46 -19 39 -7 42.5 -13 22.5 0.76 NNW35 C R F FROPA BREEZY COLD 10 53 -14 35 -10 44.0 -12 21.0 NNW29 PC VIRGA (AFT) 11 70 +1 38 -7 54.0 -3 11.0 WNW25 SU 12 85 +13 53 +7 69.0 +10 4.0 W 28 PC MILD 13 86 +18 58 +9 72.0 +13 7.0 WSW25 PC MILD 14 69 +1 53 +4 61.0 +3 4.0 SSW24 PC FROPA 15 71 +2 49 +0 60.0 +1 5.0 T SSE40 PC WINDY PM RW 16 69 0 48 -1 58.5 0 6.5 1.52 WNW49 PC FROPA TRW(2) RW 17 63 -7 44 -4 53.5 -6 11.5 NW 28 PC BREEZY 18 77 +7 40 -7 58.5 0 6.5 SE 21 SU 19 79 +8 54 +5 66.5 +6 1.5 .06 SW 28 PC RW 20 81 +10 60 +10 70.5 +10 5.5 .05 SSW31 PC RW(EVE) DST LTG (EVE) 21 83 +11 61 +10 72.0 +10 7.0 W 24 PC 22 88 +17 62 +13 75.0 +15 10.0 SW 29 PC BREEZY WARM 23 86 +15 64 +14 75.0 +14 10.0 .20 SW 36 PC BREEZY TRW(PM) 24 65 -9 47 -3 56.0 -6 9.0 .04 NNW33 PC RW(AM) FROPA COOLER 25 77 +3 48 -3 62.5 0 2.5 S 38 PC BREEZY 26 81 +9 55 +4 68.0 +6 3.0 .09 SW 46 PC RW FROPA 27 64 -11 51 -1 57.5 -6 7.5 WSW20 PC PLEASANT 28 76 +3 45 -8 60.5 -2 4.5 SSE25 PC H- 29 84 +10 58 +7 71.0 +9 6.0 .04 SSW32 PC RW(AM) TRW(AFT) H- 30 77 +3 54 +2 65.5 +2 0.5 .89 SSW49 PC RW TRW WINDY F- FROPA ----------------------------------------------------------------------------- SUMMARY OF APRIL 1996: TEMPERATURE: Monthly mean: High = 71.3 Low = 48.5 Mean = 59.9 Departure < Normal: High = +1.6 Low = +0.3 Mean = +1.0 Degree Days: Heating = 211.0 Cooling = 59.0 Number of Days Using: Heating = 19 Cooling = 11 Days with maximum temperature >= 90: 0 Days with maximum temperature <= 32: 0 Days with minimum temperature <= 32: 0 Days with minimum temperature <= 0: 0 PRECIPITATION: Total month = 5.20" Departure < Normal = + 1.60" Normal month (to date) 3.60" or 145% Average daily = 0.17" Normal daily = 0.12" Number of days with measurable precipitation = 13 Year-to-date = 17.35" Departure = +1.80" 112% of normal Maximum for April = 7.08" in 1991 --> (Since Minimum for April = 1.21" in 1985 --> 1977) Number of days with 0.01" or more: 13 Snowfall Number of days with 0.10" or more: 6 April total = 0.00" Number of days with 0.50" or more: 5 April maximum = 1.1" Number of days with 1.00" or more: 1 in 1983 DAILY EXTREMES: Low temperature = 35 on the 8th and 10th High temperature = 88 on the 22nd Maximum daily precipitation = 1.52" on the 16th Maximum 24-hour rainfall = 1.52" on the 16th Maximum wind gust = WNW 49 mph/SSW 49 mph on the 16th/30th Maximum barometric pressure = 30.341" on the 28th Minimum barometric pressure = 29.649" on the 16th NUMBER OF: Days Cloudy: 2 Days with thunderstorms: 4 Days Partly Cloudy: 24 # of Thunderstorms: 5 Days Clear/Sunny: 4 Days with some type of snowfall: 0 Days with Fog/Ground fog: 4 ---------------------------------------------------------------------------- YEAR-TO-DATE: (through April 30th, 1996) Temperatures Degree Days Precipitation Mean maximum: 56.0 (-1.1) Heating: 2305.0 Aqueous: 17.35" (DEP +1.80") Mean minimum: 36.9 (-0.8) Cooling: 59.5 Maximum monthly: 5.60"/JAN. Mean monthly: 46.4 (-1.0) Minimum monthly: 2.65"/FEB. Highest: 88, April 22nd Snowfall: 15.90" Lowest: 8, February 5th Maximum daily: 4.50"/JAN. 6 Days with maximum temperature >= 90: 0 Maximum monthly: 8.00"/FEB. Days with maximum temperature <= 32: 27 Seasonal total: 16.20" Days with minimum temperature <= 32: 48 Days with some type of Days with temperature <= 0: 0 snowfall: 15 Days with measurable Number of: precipitation: 51 or 42% Days using Heating: 109 Days using Cooling: 13 Days with thunderstorms: 9 Days Cloudy: 27 Number of thunderstorms: 10 Days Partly Cloudy: 79 Days Clear/Sunny: 15 Greatest 24-hour period Days with fog/ground fog: 42 rainfall: 1.69"/Jan. 6-7th Wind (Highest Recorded Wind Gust): SSW 64 miles per hour, JAN. 19 Barometer: Highest 30.937" on March 10th; Lowest: 29.196" on March 19th --------------------------------------------------------------------------- DENOTATIONS (Weather/sky conditions) Intensity Markings A Hail GF Ground fog RW Rainshower Precipitation: AP Small hail GL Glaze S Snow - Light B Blowing H Haze SG Snow granules + Heavy C Cloudy IP Ice pellets SP Snow pellets Sky Condition: CL Clear K Smoke SU Sunny -Thin or Partial D Dust L Drizzle TRW Thundershower Departures from F Fog LTG Lightning T Thunderstorm Norms: FR Frost PC Partly Cloudy X Obscurred Sky - below; + above R Rain Y Spray ZL Freezing drizzle ZR Freezing rain ----------------------------------------------------------------------------- OTHER DENOTATIONS: NA, not available; NR, not recorded; TEMP, temperature; MAX, maximum; MIN, minimum; T, trace of precipitation; INOP, inopera- tive 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; PM afternoon hours; EVE 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 of High, LB Low Barometer Reading (Inches) Low or Mean Temperature SC Dominant Daily Sky Cover HDD Heating Degree Days WXR TYPES Observed Weather Conditions CDD Cooling Degree Days and Remarks ----------------------------------------------------------------------------- NOTES: All temperatures are in degrees fahrenheit. All precipitation measurements are in inches. All wind speeds are in miles per hour. -----------------------------------------------------------------------------