MONTHLY SUMMARY OF CLIMATOLOGICAL DATA - PORTSMOUTH, VIRGINIA Portsmouth Weather Records Service Portsmouth, Virginia 23702-2017 (3 miles south/West Cradock Section) 12:01 AM EDT, Wednesday, June 1, 1994 Monthly summary of Local Climatological Data for Portsmouth, Virginia West Cradock Section, during the month of May, 1994. Time is EDT. ---------------------------------------------------------------------------- D HT DN LT DN MT DN HDD CDD PREC HB LB WD WS SC WXR TYPE/REMARKS ---------------------------------------------------------------------------- 1 82 6 62 9 72.0 7 7.0 .13 999 983 N 23 PC RW WARM FROPA 2 62 -13 51 -1 56.5 -7 8.5 .08 024 999 N 17 PC RW- CHILLY 3 68 -7 43 -10 55.5 -8 9.5 .07 031 013 NE 23 PC GF-(AM) R-(PM) 4 57 -15 52 -2 54.5 -8 10.5 1.85 015 983 NE 31 C R F- WINDY COOL L- 5 61 -11 53 -1 57.0 -6 8.0 .14 995 980 N 17 PC R- L F RW 6 77 1 49 -5 63.0 -2 2.0 001 991 W 23 PC GF- H- 7 80 5 57 3 68.5 4 3.5 004 973 SSW 17 PC WARMFROPA H 8 70 -4 52 -2 61.0 -3 4.0 .31 989 965 SW 21 PC RW- TRW (1) FROPA 9 75 2 47 -6 61.0 -2 4.0 001 989 SW 17 -PC CHILLY THEN MILD 10 72 -4 53 -1 62.5 -2 2.5 011 994 N 17 PC FROPA 11 78 1 47 -7 62.5 -3 2.5 019 000 S 13 SU COOL THEN MILD 12 82 3 59 2 70.5 3 5.5 000 969 SW 25 PC FROPA 13 68 -11 51 -7 59.5 -9 5.5 006 992 N 21 -PC COOLER 14 75 -2 48 -11 61.5 -6 3.5 013 001 N 13 -PC 15 87 10 60 2 73.5 6 8.5 --- 978 SW 27 PC BREEZY DST LTG 16 84 7 65 9 74.5 8 9.5 .19 980 968 N 20 PC FROPA RW DSNT LTG 17 66 -11 58 1 62.0 -5 3.0 998 976 N 25 PC COOL 18 66 -13 55 -3 60.5 -8 4.5 998 989 N 18 PC COOL 19 61 -16 53 -5 57.0 -11 8.0 .21 000 990 NE 20 PC RW L 20 59 -15 53 -6 56.0 -11 9.0 T 002 996 NE 23 C L- BREEZY COOL 21 62 -16 52 -8 57.0 -12 8.0 T 008 996 NE 20 C BREEZY COOL 22 73 -5 51 -7 62.0 -6 3.0 002 987 NNE 18 PC PLEASANT 23 89 7 52 -8 70.5 -1 5.5 --- --- --- -- SU WARMER 24 87 7 63 1 75.0 4 10.0 --- --- NNE 14 SU WARM 25 89 9 66 6 77.5 8 12.5 --- --- SW 20 PC HOT HAZE DSNT LTG 26 89 11 67 6 78.0 8 13.0 .98 974 956 SW 25 PC HOT H TRW (2) F 27 69 -9 58 -1 63.5 -5 1.5 .01 --- --- N 23 PC RW- F FROPA 28 73 -6 48 -12 60.5 -9 4.5 --- --- SSW 13 SU PLEASANT 29 80 -2 49 -13 64.5 -8 0.5 --- --- S 15 SU PLEASANT 30 82 0 56 -7 69.0 -3 4.0 --- --- S 17 SU 31 84 -1 58 -7 71.0 -4 6.0 --- --- S 10 PC ---------------------------------------------------------------------------- SUMMARY OF MAY 1994: TEMPERATURE: Monthly mean: High = 74.4 Low = 54.5 Mean = 64.4 Departure < Normal: High = -3.2 Low = -2.8 Mean = -3.0 Degree Days: Heating = 102.5 Cooling = 85.0 Number of Days Using: Heating = 20 Cooling = 11 PRECIPITATION: Total month = 3.97" Normal month = 4.11" Departure < Normal = -0.14" or 97% Normal Average daily = 0.13" Normal daily = 0.13" Number of days with measurable precipitation = 10 Maximum for May = 8.06" in 1988 Minimum for May = 1.02" in 1986 Number of days with 0.01" or more: 10 Snowfall Number of days with 0.10" or more: 7 May total = 0.00" Number of days with 0.50" or more: 2 May maximum = 0.00" Number of days with 1.00" or more: 1 DAILY EXTREMES: Low temperature = 43 on the 3rd High temperature = 89 on the 23rd, 25th, and 26th Maximum daily precipitation = 1.85" on the 4th Maximum 24-hour rainfall = 1.99" on the 4th - 5th Maximum wind gust = 31 mph from the Northeast on the 4th High barometer = 30.31" on the 3rd Low barometer = 29.56" on the 26th Number of Days with thundershowers/ Days Cloudy: 3 storms: 2 Days Partly Cloudy: 22 Number of thundershowers/ Days Clear/Sunny: 6 storms: 3 Days with Fog/Ground fog: 6 Days with some type of snowfall: 0 --------------------------------------------------------------------------- YEARLY-TOTALS-TO-DATE Temperatures Degree Days Precipitation Mean maximum: 62.5 (+1.2) Heating: 2135.5 Aqueous: 25.06" (DN +5.04") Mean minimum: 41.6 (-0.1) Cooling: 177.0 Maximum monthly: 10.96"/MAR. Mean monthly: 52.1 (+0.6) Minimum monthly: 1.23"/APR. Highest: 90, April 26th Snowfall: 8.00" Lowest: 5, January 19th Maximum daily: 2.00"/JAN.14 Days with maximum temperature >= 90: 01 Maximum monthly: 6.90"/JAN. Days with minimum temperature <= 32: 38 Days with some type of Days with temperature <= 0: 00 snowfall: 15 Days with measurable precipitation: 51 or 34% Number of Days with thundershowers/ Days Cloudy: 26 storms: 09 Days Partly Cloudy: 88 Number of thundershowers/ Days Clear/Sunny: 37 storms: 09 Days with fog/ground fog: 44 Greatest 24-hour period rainfall: 3.69"/March 1-2 Wind (Highest Recorded Wind Gust): Southwest 50 miles per hour, January 4th West 50 miles per hour, March 18th Barometer: Highest 30.80" on January 10th; Lowest: 29.12" on March 2nd ---------------------------------------------------------------------------- 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; PREC., precipitation; YR, year; NORM, normal; DSNT (with LTG), distant lightning; CLDFROPA or CFP, cold frontal passage; AM morning; PM afternoon hours; EVE evening hours; E estimated ----------------------------------------------------------------------------- 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 VBL Variable wind directions ----------------------------------------------------------------------------- NOTES: All temperatures are in degrees fahrenheit. All precipitation mea- surements are in inches. All wind speeds are in miles per hour. -----------------------------------------------------------------------------