July 1997
Text summary is followed by graphs!
FRI, AUG 1, 1997 8:55 AM 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 1997.
Time is EDT.
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D HT DN LT DN MT DN HDD CDD PREC WD WS SC WXR TYPE/REMARKS
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1 86 0 72 +3 79.0 +2 14.0 0.23 ESE19 PC SHRA HUMID
2 87 0 72 +3 79.5 +1 14.5 0.45 SE 24 PC SHRA TSRA
3 95 +7 72 +3 83.5 +5 18.5 SSW20 PC HZ
4 97 +9 73 +3 85.0 +6 20.0 WSW22 SU -HZ
5 83 -4 74 +4 78.5 0 13.5 T ESE20 PC -TSRA FROPA
6 86 -3 72 +1 79.0 -1 14.0 T ESE20 PC DST LTG -SHRA
7 88 -2 71 0 79.5 -1 14.5 ESE20 PC BR(AM) HZ
8 92 +2 71 +1 81.5 +2 16.5 ESE17 PC BR(AM) HZ
9 94 +3 74 +3 84.0 +3 19.0 SSW31 PC BR(AM) HZ
10 82 -8 73 +1 77.5 -3 12.5 T N 19 PC HZ FROPA BR -SHRA
11 83 -6 70 -1 76.5 -4 11.5 NNE18 PC
12 88 -2 63 -9 75.5 -5 10.5 ESE15 SU -HZ -BR(AM)
13 92 +1 66 -7 79.0 -3 14.0 SE 17 PC
14 94 +3 69 -5 81.5 -1 16.5 ESE18 PC HZ HOT
15 99 +9 72 -1 85.0 +4 20.5 S 21 SU HZ VERY HOT
16 99 +9 72 0 85.5 +4 20.5 0.27 ESE27 PC HZ HOT TSRA BR
17 91 +2 70 -2 80.5 0 15.5 S 13 PC BR HZ HUMID
18 95 +5 73 +1 84.0 +3 19.0 0.01 ESE26 PC HZ BR -TSRA
19 94 +4 74 +3 84.0 +3 19.0 0.04 S 26 PC HZ SHRA BR DST LTG FROPA
20 88 -3 73 +2 80.5 0 15.5 NE 20 PC HZ BR
21 91 0 74 +1 82.5 +1 17.5 0.67 SSW28 PC BR HZ TSRA SHRA
22 94 +5 72 -1 83.0 +2 18.0 0.88 NW 19 PC BR HZ TSRA SHRA
23 84 -3 72 0 78.0 -1 13.0 0.61 S 12 C BR TSRA SHRA DST LTG
24 80 -8 68 -3 74.0 -6 9.0 1.94 N 56 C BR +SHRA TSRA PASSAGE
TO S (40-60 MILES)
OF TS DANNY; TC+ 2 SM ENE
25 76 -13 65 -6 70.5 -9 5.5 NNW14 C BR
26 87 -2 65 -6 76.0 -4 11.0 SSE17 PC BR HZ
27 93 +4 73 +1 83.0 +2 18.0 S 21 PC BR HZ
28 95 +7 77 +5 86.0 +6 21.0 0.04 ESE19 PC HZ TSHR
29 84 -4 73 +3 78.5 -1 13.5 N 20 PC BR FROPA
30 75 -12 68 -2 71.5 -7 6.5 0.03 NNE14 PC SHRA FC OVER ATLANTIC
AND HARBOR
31 80 -9 62 -9 71.0 -9 6.0 NNE18 SU DRY COOL
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SUMMARY OF JULY 1997:
TEMPERATURE:
Monthly mean: High = 88.8 Low = 70.8 Mean = 79.8
Departure < Normal: High = - 0.2 Low = - 0.5 Mean = - 0.4
Degree Days: Heating = 00.0 Cooling = 458.5
Number of Days Using: Heating = 0 Cooling = 31
Days with maximum temperature >= 90: 15
Days with maximum temperature <= 32: 0
Days with minimum temperature <= 32: 0
Days with minimum temperature <= 0: 0
PRECIPITATION:
Total month = 5.17" Departure < Normal = + 0.11"
Normal month (to date) 5.06" or 102%
Average daily = 0.17"
Normal daily = 0.16"
Number of days with measurable precipitation = 11
Year-to-date = 20.00" Departure = - 7.83" or 72% of normal
Maximum for July = 11.80" in 1996 --> (Since
Minimum for June = 1.32" in 1978 --> 1977)
Number of days with 0.01" or more: 11 Snowfall
Number of days with 0.10" or more: 7 JULY total = 0.00"
Number of days with 0.50" or more: 4 JULY max = 0.00"
Number of days with 1.00" or more: 1
DAILY EXTREMES: Low temperature = 62 on the 31st
High temperature = 99 on the 15th & 16th
Maximum daily precipitation = 1.94" on the 24th
Maximum 24-hour rainfall = 1.94" on the 24th
Maximum wind gust = N 56 mph on the 24th
Maximum barometric pressure = 30.261" on the 31st
Minimum barometric pressure = 29.708" on the 3rd
NUMBER OF:
Days Cloudy: 3 Days with thunderstorms: 9
Days Partly Cloudy: 24 # of Thunderstorms: 9
Days Clear/Sunny: 4 Days with some type of snowfall: 0
Days with Fog/Ground Fog: 18
Days with Dense Fog: 0
Days with Frost: 0
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YEAR-TO-DATE: (through July 31st, 1997)
Temperatures Degree Days Precipitation
Mean maximum: 68.2 (-0.5) Heating: Aqueous: 20.00" (DEP - 7.83")
Mean minimum: 50.0 (+0.5) 2084.0 Maximum monthly: 5.17"/JUL.
Mean monthly: 59.1 ( 0.0) Cooling: Minimum monthly: 1.12"/JUN.
823.5
Highest: 100, June 26th
Snowfall: 0.10"
Lowest: 13, January 19 Maximum daily: 0.10"/JAN.11
Days with max temperature >= 90: 24 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: 66 or 31.13%
Days using Heating: 139
Days using Cooling: 71 Days with thunderstorms: 17
Days Cloudy: 26 Number of thunderstorms: 17
Days Partly Cloudy: 132
Days Clear/Sunny: 54 Greatest 24-hour period
Days with fog/ground fog: 78 rainfall: 1.94"/JUL. 24th
Wind (Highest Gust): SW 56 miles per hour, March 29th
N 56 miles per hour, July 24th
Barometer: Highest 30.670" on February 17th
Lowest: 29.412" on April 24th
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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
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
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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
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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 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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