July & Yearly 1999
Graphs follow the text summary!
SUN, AUGUST 1, 1999 9:30 PM EDT
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MONTHLY SUMMARY OF CLIMATOLOGICAL DATA - PORTSMOUTH, VIRGINIA
Portsmouth Weather Records Service
Portsmouth, Virginia 23702-2017
(3 miles south / West Cradock Section)
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Monthly summary of Local Climatological Data for Portsmouth,
Virginia, West Cradock Section, during the month of July 1999.
Time is EDT.
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D HT DN LT DN MT DN HDD CDD PREC WD WS WAS SC WXR TYPE/REMARKS
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1 90 +4 74 +5 82.0 +5 17.0 T SSW23 S 7.1 PC -SHRA HUMID
2 91 +4 74 +4 82.5 +4 17.5 SSW19 SSW5.0 PC HOT HUMID
3 94 +5 74 +5 84.0 +5 19.0 SSW15 SSW5.3-PC HZ HOT HUMID
4 95 +7 75 +5 85.0 +6 20.0 W 17 S 4.5-PC HZ HOT HUMID
5 *98 +10 *78 +7 88.0 +9 23.0 NNE15 NNE4.5-PC HZ HOT HUMID
*NEW STATION MAX HIGH TEMP RECORD *TIED AREA MAX HIGH TEMP
*NEW STATION MAX MINIMUM TEMP
6 *101 +12 *80 +8 90.5 +10 25.5 S 15 S 2.8 SU VERY HOT HZ HUMID
*NEW STATION MAX HIGH TEMP RECORD *TIED HIGH MINIMUM TEMP RECORD
7 96 +6 72 +1 84.0 +4 19.0*1.18*NNE32 S 4.9 PC HZ HOT HUMID TSRA(2) BR
*NEW STATION DAILY PRECIP RECORD *NEW DAILY MAX WIND GUST SPEED
8 90 0 71 +1 80.5 +1 15.5 W 16 W 2.8 SU -HZ-BR NOT AS HOT
9 96 +5 75 +3 85.5 +4 20.5 SSW22 S 4.3 SU -HZ HOT HUMID
10 95 +5 79 +7 87.0 +6 22.0 T W 23 S 5.4 PC -HZ BREEZY HOT SHRA
DST LTG HUMID FROPA
11 *80 -8 68 -3 74.0 -6 9.0 0.04 NNE22 NNE4.5 PC SHRA COOLER
*TIED STATION MINIMUM MAX TEMPERATURE
12 *74 -15 68 -3 71.0 -9 6.0 0.81 NNE18 NNE5.0 C SHRA BR RA
*NEW STATION MINIMUM MAX TEMPERATURE
13 *72 -18 67 -6 69.5 -12 4.5 0.51 N 19 NNE5.9 C RA SHRA BR DZ
*NEW STATION MINIMUM MAX TEMPERATURE
14 *71 -19 68 -5 69.5 -12 4.5*2.30 NNE18 NNE4.4 C RA BR
*NEW STATION MINIMUM MAX TEMPERATURE *NEW STATION DAILY PRECIP RECORD
15 82 -7 69 -4 75.5 -5 10.5 N 13 NNE2.0 PC HUMID HZ
16 86 -3 67 -5 76.5 -4 11.5 N 16 NE 1.9 PC HZ HUMID
17 91 +2 72 0 81.5 +1 16.5 S 12 S 2.8 PC HZ HUMID
18 92 +2 74 +3 83.0 +2 18.0 SSW15 S 4.2 PC HZ HUMID
19 94 +3 75 +3 84.5 +3 19.5 W 21 S 4.6 PC HZ HUMID
20 95 +4 77 +5 86.0 +5 21.0*1.34 SE 21 NNE2.6 PC TSRA(1) BR
*NEW STATION DAILY PRECIP RECORD
21 86 -5 76 +3 81.0 -1 16.0 NE 14 NNE2.6 C H BR HUMID
22 93 +3 76 +3 84.5 +3 19.5 W 16 SSW1.8 PC HZ BR HUMID
23 91 +3 *79 +7 85.0 +5 20.0 NNE15 ESE3.0 SU HZ BR HOT HUMID
*NEW STATION MAX MINIMUM TEMPERATURE
24 97 +8 71 0 84.0 +4 19.0*7.07 NNE35 S 4.8 PC HZ HOT HUMID +TSRA(4)
BR GR(2 OCCURENCES)
*NEW STATION DAILY PRECIP RECORD AND ALL-TIME STATION DAILY PRECIP RECORD
*NEW STATION MONTHLY PRECIP RECORD FOR JULY
25 91 +2 72 +1 81.5 +2 16.5 W 16 W 4.5 PC BR HZ HOT HUMID
26 93 +4 73 +2 83.0 +3 18.0 W 19 W 3.3 PC HZ BR HOT HUMID
27 96 +7 71 -1 83.5 +3 18.5 W 16 W 1.8 SU HZ BR HOT HUMID
28 95 +7 76 +4 85.5 +5 20.5 0.07 W 30 W 3.2 PC HZ HOT HUMID -TSRA
29 90 +2 73 +2 81.5 +2 16.5 WSW16 W 3.6 PC HZ HOT HUMID
30 95 +7 *76 +5 85.5 +6 20.5 W 13 S 0.7 SU HZ HOT HUMID
*NEW STATION MAX MINIMUM TEMPERATURE
31 *98 +9 *80 +9 89.0 +9 24.0 W 15 W 2.6 SU HZ HOT HUMID
*NEW STATION MAXIMUM TEMPERATURE *NEW STATION MAX MINIMUM TEMPERATURE
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SUMMARY OF JULY 1999:
TEMPERATURE:
Monthly mean: High = 90.6 Low = 73.6 Mean = 82.1
Departure < Normal: High = +1.6 Low = +2.2 Mean = +1.9
Degree Days: Heating = 0.0 Cooling = 529.0
Num er of Days Using: Heating = 0 Cooling = 31
Days with maximum temperature >=100: 1
Days with maximum temperature >= 90: 24
Days with maximum temperature <= 32: 0
Days with minimum temperature <= 32: 0
Days with minimum temperature <= 0: 0
PRECIPITATION:
Total month = 13.32" Departure from Normal = + 7.99"
Normal month (to date) = 5.33" or 250%
Average daily = 0.43"
Normal daily = 0.17"
Number of days with measurable precipitation = 8
Year-to-date = 31.47" Departure = + 3.30" or 112% of normal
Maximum for July = 13.32" in 1999 --> (Since
Minimum for June = 1.32" in 1978 --> (1976)
Number of days with 0.01" or more: 8 Snowfall
Number of days with 0.10" or more: 6 July total = 0.00"
Number of days with 0.50" or more: 6
Number of days with 1.00" or more: 4 July max = 0.0"
DAILY EXTREMES: Low temperature = 67 on the 13th, 16th
High temperature = 101 on the 6th
Maximum daily precipitation = 7.07" on the 24th
Maximum 24-hour rainfall = 7.07" on the 24th
Maximum barometric pressure = 30.216" on the 15th
Minimum barometric pressure = 29.673" on the 30th
Frozen precip = 0.00"
WIND:
Maximum wind gust = NNE 35 MPH on the 24th
NUMBER OF:
Days Cloudy: 4 Days with thunderstorms: 4
Days Partly Cloudy: 20 # of Thunderstorms: 8
Days Clear/Sunny: 7 Days with some type of snowfall: 0
Days with Fog/Ground Fog: 13
Days with Dense Fog: 0
Days with Frost: 0
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YEAR-TO-DATE: (through July 31st, 1999)
Temperatures Degree Days Precipitation
Mean maximum: 69.4 (+0.6) Heating: Aqueous: 31.47" (DEP +3.30") 112%
Mean minimum: 51.5 (+1.7) 1935.0 Maximum monthly: 13.32"/JUL.
Mean monthly: 60.4 (+1.1) Cooling: Minimum monthly: 2.14"/FEB.
969.5
Highest: 101, July 6
Snowfall: TRACE"
Lowest: 17, January 6 Maximum daily: TRACE" (Jan. 9,10 & Mar. 8)
Days with max temperature >= 90: 33 Maximum monthly: TRACE" (Jan. & Mar.)
Days with max temperature <= 32: 1
Days with min temperature <= 32: 21 Days with some type of
Days with temperature <= 0: 0 snowfall: 8
Days with measurable
Number of: precipitation: 69 or 32.55%
Days using Heating: 120
Days using Cooling: 90 Days with thunderstorms: 15
Days Cloudy: 55 Number of thunderstorms: 20
Days Partly Cloudy: 118
Days Clear/Sunny: 39 Greatest 24-hour daily rainfall:
Days with fog/ground fog: 84 7.07"/July 24th, 1999
Days with dense fog: 3
Wind (Highest Gust): SSW 54 miles per hour, March 3rd
Barometer: Highest 30.807" on January 31st
Lowest: 29.370" on April 9th
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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
FC+ Tornado/waterspout
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
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
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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; TS, tropical storm; *tied station record
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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 WAS Average Wind Speed & Dominant
Direction
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
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NOTES: All temperatures are in degrees fahrenheit. All precipita-
tion measurements are in inches. All wind speeds are in miles per
hour.
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