----------------------------------------------------------------------------- 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 October 1996. Time is EDT. ----------------------------------------------------------------------------- D HT DN LT DN MT DN HDD CDD PREC WD WS SC WXR TYPE/REMARKS ----------------------------------------------------------------------------- 1 74 -1 62 +4 68.0 +1 3.0 T ESE21 C RW- 2 80 +2 63 +5 71.5 +4 6.5 SE 15 PC PLEASANT 3 72 -3 56 0 64.0 -1 1.0 T NNE29 PC F (AM) FROPA RW- 4 58 -16 50 -6 54.0 -11 11.0 NNE23 PC BRISK COOL 5 63 -12 52 -4 57.5 -8 7.5 E 23 PC BRISK COOL 6 66 -8 54 0 60.0 -4 5.0 NE 22 PC BREEZY 7 67 -4 59 +5 63.0 0 2.0 0.48 NNE25 C R- F L 8 73 +1 58 +5 65.5 +3 0.5 3.42 ENE46 C R+ F L WINDY FROPA 9 74 0 51 -3 62.5 -2 2.5 0.03 S 19 PC DST LTG RW (EVE) 10 65 -6 49 -3 57.0 -4 8.0 NNW19 PC FROPA (EARLY AM) 11 60 -11 46 -9 53.0 -10 12.0 N 17 SU COOL 12 64 -6 42 -12 53.0 -9 12.0 SE 15 SU GF(AM) 13 69 -2 42 -10 55.5 -6 9.5 SSW14 SU 14 76 +5 50 -3 63.0 +1 2.0 WSW15 SU GF- 15 64 -8 50 0 57.0 -4 8.0 NNE17 SU FROPA 16 77 +5 48 -2 62.5 +1 2.5 WSW20 SU 17 81 +12 60 +10 70.5 +11 5.5 WSW17 PC GF (AM) 18 81 +9 54 +4 67.5 +6 2.5 0.59 NNW31 PC F H K TRW FROPA 19 61 -9 43 -6 52.0 -8 13.0 0.78 NNW30 PC TRW R BREEZY COOL 20 60 -9 39 -11 49.5 -10 15.5 WNW19 PC COOL 21 66 -4 43 -6 54.5 -5 10.5 W 16 PC GF- 22 76 +6 51 +3 63.5 +4 1.5 SSW18 PC 23 80 +9 58 +7 69.0 +8 4.0 SW 26 SU 24 72 +3 50 -1 61.0 +1 4.0 WSW19 PC 25 71 +3 48 -3 59.5 0 5.5 N 16 SU 26 73 +6 56 +6 64.5 +6 0.5 0.05 ESE11 PC GF RW- (EVE) 27 74 +8 60 +11 67.0 +9 2.0 0.04 SW 14 PC F RW- (AM) 28 78 +10 56 +7 67.0 +8 2.0 W 24 SU QUITE PLEASANT FROPA 29 62 -3 50 +2 56.0 0 9.0 NNE21 SU COOLER 30 81 +16 52 +3 66.5 +9 1.5 WSW31 SU BREEZY WARM 31 74 +7 53 +3 63.5 +5 1.5 WNW18 PC ----------------------------------------------------------------------------- SUMMARY OF OCTOBER 1996: TEMPERATURE: Monthly mean: High = 70.7 Low = 51.8 Mean = 61.2 Departure < Normal: High = 0.0 Low = -0.2 Mean = -0.1 Degree Days: Heating = 144.0 Cooling = 27.5 Number of Days Using: Heating = 22 Cooling = 9 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 = 5.39" Departure < Normal = +1.98" Normal month (to date) 3.41" or 158% Average daily = 0.17" Normal daily = 0.11" Number of days with measurable precipitation = 7 Year-to-date = 50.11" Departure = + 9.14" or 122% of normal Maximum for October = 8.08" in 1995 --> (Since Minimum for October = 0.48" in 1984 --> 1976) Number of days with 0.01" or more: 7 Snowfall Number of days with 0.10" or more: 4 October total = 0.00" Number of days with 0.50" or more: 3 October maximum = 0.00" Number of days with 1.00" or more: 1 DAILY EXTREMES: Low temperature = 39 on the 20th High temperature = 81 on the 17th, 18th, and 30th Maximum daily precipitation = 3.42" on the 8th Maximum 24-hour rainfall = 3.90" on the 7th & 8th Maximum wind gust = ENE46 mph on the 8th Maximum barometric pressure = 30.544" on the 1st Minimum barometric pressure = 29.168" on 8th NUMBER OF: Days Cloudy: 3 Days with thunderstorms: 2 Days Partly Cloudy: 19 # of Thunderstorms: 1 Days Clear/Sunny: 9 Days with some type of snowfall: 0 Days with Fog/Ground Fog: 11 Days with Dense Fog: 0 ---------------------------------------------------------------------------- YEAR-TO-DATE: (through October 31, 1996) Temperatures Degree Days Precipitation Mean maximum: 70.8 (-1.1) Heating: 2537.0 Aqueous: 50.11" (DEP +9.14") Mean minimum: 52.2 (-0.9) Cooling: 1480.5 Maximum monthly: 11.80"/JUL. Mean monthly: 61.5 (-1.0) Minimum monthly: 2.65"/FEB. Highest: 98, May 20th Snowfall: 15.90" Lowest: 8, February 5th Maximum daily: 4.50"/JAN. 6 Days with maximum temperature >= 90: 31 Maximum monthly: 8.00"/FEB. Days with maximum temperature <= 32: 9 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: 115 or 38% Days using Heating: 151 Days using Cooling: 152 Days with thunderstorms: 40 Days Cloudy: 49 Number of thunderstorms: 52 Days Partly Cloudy: 209 Days Clear/Sunny: 47 Greatest 24-hour period Days with fog/ground fog: 113 rainfall: 3.90"/OCT. 7-8th Wind (Highest Recorded Wind Gust): SSW 64 miles per hour, January 19th Barometer: Highest 30.937" on March 10th; Lowest: 29.168" on October 8th --------------------------------------------------------------------------- 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. -----------------------------------------------------------------------------