September & Yearly 2000
Graphs follow the table summary!

 
Portsmouth Weather Records Service
 

Local Climatological Data
*Data Are Subject to Correction by PWRS

 Station:  PORTSMOUTH, VIRGINIA
Month:   SEPTEMBER   Year: 2000
Latitude: 36° 50'N    Longitude: 76° 18'W  (OFFICIAL CITY) 
Station Elevation: 20 FT 
Standard Time: EASTERN DAYLIGHT

 
  Temperature Degree Days Precipitation  Wind       Sky Weather Peak Wind 
Date Max Min Mn Dep HDD CDD Total Snow Depth Avg Dir Type Types Speed Dir
1
85
75
80.0
+4
 
15.0
T
0.0
0
0.5
SSE
PC
BR SHRA
10
SSE
2
88
76
82.0
+6
 
17.0
0.01
0.0
0
0.25
SSW
PC
BR SHRA 
DST LTG
12
N
3
82
74
78.0
+1
 
13.0
0.49
0.0
0
0.2
S
PC
BR TS SHRA
16
N
4
78
72
75.0
-1
 
10.0
0.45
0.0
0
0.8
SSE
C
BR TS SHRA
14
SSE
5
74
65
69.5
-5
 
4.5
2.07
0.0
0
9.5
N
C
BR FROPA 
+SHRA WINDY
31
N
6
72
66
69.0
-6
 
4.0
  
0.0
0
9.5
NNE
C
BREEZY COOLER
28
N
7
74
65
69.5
-6
 
4.5
 
0.0
0
4.7
N
PC
  
19
N
8
79
62
70.5
-4
 
5.5
 
0.0
0
1.9
NE
PC
 
14
NE
9
82
65
73.5
-1
 
8.5
 
0.0
0
3.0
NNE
PC
  
3
NNE
10
82
64
73.0
-2
 
8.0
 
0.0
0
0.5
NE
SU
  
13
NNE
11
84
66
75.0
+1
 
10.0
 
0.0
0
1.7
NNE
SU
PLEASANT
12
NNE
12
85
69
77.0
+3
 
12.0
 
0.0
0
1.1
SSE
PC
+FG
10
SSE
13
85
71
78.0
+4
 
13.0
 
0.0
0
1.2
NNE
SU
BR
14
N
14
84
70
77.0
+3
 
12.0
 
0.0
0
3.5
SSE
SU
-BR(AM)
12
SE
15
77
64
70.5
-3
 
5.5
0.02
0.0
0
4.2
N
PC
DSTLTG  SHRA FROPA
20
N
16
69
55
62.0
-11
3.0
 
 
0.0
0
4.2
N
SU
COOLER DRY
19
N
17
71
56
63.5
-9
1.5
 
 
0.0
0
2.0
N
-PC
 
13
N
18
72
56
64.0
-9
1.0
 
0.33
0.0
0
0.2
N
C
RA BR SHRA
10
NNE
19
77
70
73.5
+1
 
8.5
0.08
0.0
0
4.5
S
PC
SHRA -BR
29
W
20
85
67
76.0
+4
 
11.0
 
0.0
0 
5.2
S
SU
-BR (AM)
19
S
21
82
70
76.0
+4
 
11.0
 
0.0
0
4.6
S
PC
FROPA (EVE)
19
S
22
73
65
69.0
-2
 
4.0
0.22
0.0
0
4.0
NNE
PC
-RA BR SHRA
22
NNE
23
76
68
72.0
+4
 
7.0
1.17
0.0
0
0.8
ESE
C
BR RA SHRA
10
S
24
81
69
75.0
+7
 
10.0
0.01
0.0
0
2.9
S
PC
BR -SHRA
18
WSW
25
73
64
68.5
-1
 
3.5
0.69
0.0
0
3.7
N
C
BR RA FROPA 
SHRA TS
17
NNE
26
68
54
61.0
-10
4.0
 
0.54
0.0
0
5.6
N
C
BR SHRA DZ
19
N
27
66
54
60.0
-9
5.0
 
 
0.0
0
3.8
N
PC
 
15
NNE
28
71
49
60.0
-8
5.0
 
 
0.0
0
2.2
NNE
SU
 
15
NNE
29
67
58
62.5
-4
2.5
 
 
0.0
0
5.8
NNE
PC
 
23
N
30
72
60
66.0
-1
 
1.0
 
0.0
0
3.8
NNE
PC
BREEZY
19
N

 
Temperature Data
AVERAGE HIGH : 77.1º     DEPARTURE:  -3.8º
AVERAGE LOW :  64.6º     DEPARTURE:  +0.5º
MEAN:                    70.9º     DEPARTURE:   -1.6º

HIGHEST: 88º on 2nd
LOWEST:  49º on 28th

Number of Days:
00 - MAX 100º OR ABOVE
00 - MAX 32º OR BELOW
00 - MAX 90º OR ABOVE
00 - MIN 32º OR BELOW
00 - MIN 0º OR BELOW

Heating Degree Days
TOTAL THIS MONTH: 22.0 from 7 days
SEASONAL TOTAL:   22.0

Cooling Degree Days
TOTAL THIS MONTH: 198.5 from 23 days
SEASONAL TOTAL:   1501.5

NUMBER OF:

07 - Days Cloudy
16 - Days Partly Cloudy
07 - Days Clear or Sunny

16 - Days with Fog/Ground Fog
01 - Days with Dense Fog

00 - Days with Frost

03 - Days with Thunderstorms
03 - Thunderstorms

00 - Days with some type of Snowfall

 Precipitation Data
TOTAL FOR THE MONTH:  6.08"
DEPARTURE FROM NORMAL: +1.39" or 130%
GREATEST DAILY: 2.07" on the 5th
GREATEST IN 24-HR PERIOD: 2.52" on the 4th-5th
AVERAGE DAILY: 0.20"
NORMAL DAILY:   0.16"
# DAYS WITH MEASURABLE PRECIPITATION:  12
YEAR-TO-DATE: 45.30"  DEPARTURE: +7.02" or 118% of the norm

MAXIMUM FOR SEPTEMBER: 21.91" in 1999 --> (since
MINIMUM FOR SEPTEMBER:    0.26" in 1978 -->  1976)

Snowfall, Ice Pellets
TOTAL FOR THE MONTH: 0.00"
GREATEST IN 24 HOURS: 0.00" on the ---
GREATEST DEPTH ON GROUND: 0.00 on the ---

SEPTEMBER MAX = 0.0"

Number of Days:
WITH 0.01" OR MORE PRECIP: 12
WITH 0.10" OR MORE PRECIP: 8
WITH 0.50" OR MORE PRECIP: 4
WITH 1.00" OR MORE PRECIP: 2

Pressure Data
HIGHEST SEA-LEVEL:  30.302" on the 7th
LOWEST SEA-LEVEL:   29.610" on the 15th

Wind
PEAK WIND GUST: 31 mph from the N on the 5th
PEAK DAILY AVERAGE WIND SPEED: 9.5 mph on the 5th & 6th
AVERAGE SPEED: 3.0 mph from a dominant N direction

 
SEPTEMBER RECORDS
  • 1st - Maximum minimum - 75o Tie (previous 1980)
  • 5th - Minimum Maximum - 74o Tie (previous 1984)
  • 6th - Minimum Maximum - 72o (previous 74o 1984)
  • 18th - Daily precipitation - 0.33" (previous 0.07" in 1980)
  • 23rd - Daily precipitation - 1.17" (previous 1.05" in 1979)
  • 26th - Minimum Maximum - 68o (previous 72o 1982)
  • 27th - Minimum Maximum - 66o Tie (previous 1984)

YEAR-TO-DATE 2000 [through 9/30/00; next update 10/31/00]

Temperature Data
AVERAGE HIGH : 71.7º   DEPARTURE: -0.4º
AVERAGE LOW :  54.8º   DEPARTURE: +1.2º
MEAN:                     63.3º  DEPARTURE:  +0.5º

HIGHEST: 95º on 13th of May
LOWEST:  12º on 28th of January

Number of Days:
00 - MAX 100º OR ABOVE
06 - MAX 32º OR BELOW
28 - MAX 90º OR ABOVE
26 - MIN 32º OR BELOW
00 - MIN 0º OR BELOW

Heating Degree Days
TOTAL:  1974.5

Cooling Degree Days
TOTAL:      1501.5

NUMBER OF:

041 - Days Cloudy
170 - Days Partly Cloudy
063 - Days Clear or Sunny

097 - Days with Fog/Ground Fog
025 - Days with Dense Fog

07 - Days with Frost

36 - Days with Thunderstorms
38 - Thunderstorms

09 - Days with some type of Snowfall

 Precipitation Data
TOTAL: 45.30"
DEPARTURE FROM NORMAL:   +7.02" or 117%
GREATEST DAILY: 2.21" on July 24th
GREATEST IN 24- HR PERIOD: 2.52" on the 4-5th of September
AVERAGE DAILY: 0.17"
NORMAL DAILY: 0.14"
# DAYS WITH MEASURABLE PRECIPITATION:  105 or 38.32%

MAXIMUM:  11.11" in August
MINIMUM:   1.29" in February

Snowfall, Ice Pellets
TOTAL: 6.70"
GREATEST IN 24 HOURS: 4.0" on January 25th
GREATEST DEPTH ON GROUND: 4.0" on January 25th

Number of Days:

WITH 0.01" OR MORE PRECIP: 105
WITH 0.10" OR MORE PRECIP: 69
WITH 0.50" OR MORE PRECIP: 32
WITH 1.00" OR MORE PRECIP: 14

Pressure Data
HIGHEST SEA-LEVEL: 30.758" on the January 15th
LOWEST SEA-LEVEL:  29.232" on the January 25th

 
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, inoper- ative 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;

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 
PL   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
V V   Used for obscurred sky

METAR Qualifiers: (now placed in FRONT of code)

-  Light      +  Heavy      DR Low drifting     M  Below ( -x.x degrees)
                                       MI Shallow     PR Partial

August 2000 Temperature Graph
August 2000 Barometer & Wind Graph

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