September & Yearly 2001
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: 2001
Latitude: 36° 81' N    Longitude: 76° 33' W
Station Elevation: 20 FT 
Standard Time: EASTERN DAYLIGHT TIME
  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
78
70
74.0
-2
 
9.0
 0.11
0.0
0
1.0
W
PC
BR HZ 
SHRA FROPA
15
W
2
78
67
72.5
-4
 
7.5
 
0.0
0
1.8
NNE
PC
 
15
NNE
3
79
65
72.0
-5
 
7.0
 
0.0
0
1.6
NNE
PC
 
14
NNE
4
83
71
77.0
+1
 
12.0
0.02 
0.0
0
1.8
S
PC
SHRA BR
16
W
5
79
70
74.5
0
 
9.5
 
0.0
0
3.1
N
PC
BR FROPA
17
N
6
81
62
71.5
-4
 
6.5
 
0.0
0
1.4
NNE
SU
-BR
14
NNE
7
84
59
71.5
-4
 
6.5
 
0.0
0
0.3
SSE
SU
-BR
13
E
8
86
65
75.5
+1
 
10.5
 
0.0
0
0.0
SSE
PC
PLEASANT
11
S
9
85
70
77.5
+3
 
12.5
 
0.0
0
1.2
SE
PC
PLEASANT
11
SE
10
89
71
80.0
+5
 
15.0
0.47
0.0
0
0.2
S
PC
TSRA
15
W
11
80
67
73.5
0
 
8.5
 
0.0
0
3.3
N
PC
FROPA BREEZY
19
N
12
79
63
71.0
-3
 
6.0
 
0.0
0
2.7
NNE
SU
PLEASANT
16
N
13
81
57
69.0
-4
 
4.0
 
0.0
0
0.0
NNE
-PC
 
10
NNE
14
74
60
67.0
-7
 
2.0
T
0.0
0
4.2
N
PC
FROPA -SHRA
26
N
15
69
61
65.0
-8
 
 
 
0.0
0
5.4
N
PC
 
22
N
16
72
62
67.0
-6
 
2.0
 
0.0
0
3.7
N
PC
BREEZY PLEASANT
19
N
17
74
56
65.0
-7
 
 
 
0.0
0
1.3
N
-PC
PLEASANT
15
N
18
80
55
67.5
-5
 
2.5
 
0.0
0
0.0
NE
SU
DRY
11
WSW
19
80
61
70.5
-2
 
5.5
T
0.0
0
0.0
SSE
-PC
-SHRA (EVE)
10
SSE
20
75
69
72.0
0
 
7.0
0.23
0.0
0
1.3
SSE
PC
SHRA BR
13
S
21
83
69
76.0
+4
 
11.0
 T
0.0
0
0.7
S
PC
BR HZ -SHRA
12
NNE
22
85
69
77.0
+6
 
12.0
 
0.0
0
1.5
S
PC
+FG HZ
13
W
23
83
68
75.5
+7
 
10.5
 
0.0
0
1.2
NNE
PC
+FG HZ 
SEABREEZE
13
NNE
24
83
69
76.0
+8
 
11.0
1.74
0.0
0
3.2
SSE
PC
BR HZ
TSRA +SHRA
16
SSE
25
71
58
64.5
-5
0.5
 
0.18
0.0
0
2.6
W
PC
BR SHRA FROPA
16
W
26
69
54
61.5
-9
3.5
 
 
0.0
0
2.4
W
PC
 
19
W
27
73
51
62.0
-7
3.0
 
 
0.0
0
1.6
S
SU
 
15
S
28
67
57
62.0
-6
3.0
 
 
0.0
0
4.5
N
PC
FROPA (AM)
19
N
29
65
54
59.5
-7
5.5
 
T
0.0
0
5.8
N
PC
BREEZY -SHRA
25
N
30
62
55
58.5
-8
6.5
 
T
0.0
0
7.5
N
PC
BREEZY -SHRA
30
N

 
Temperature Data
AVERAGE HIGH :  77.6º     DEPARTURE:       -3.2º
AVERAGE LOW :   62.8º     DEPARTURE:       -1.3º
MEAN:                     70.2º     DEPARTURE:      -2.2º

HIGHEST: 89° on the 10th
LOWEST:  51º on the 27th

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 6 days
SEASONAL TOTAL:   22.0

Cooling Degree Days
TOTAL THIS MONTH:  178.0 from 22 days
SEASONAL TOTAL:   1496.5

NUMBER OF:

00 - Days Cloudy
25 - Days Partly Cloudy
05 - Days Clear or Sunny

11 - Days with Fog/Ground Fog
02 - Days with Dense Fog

00 - Days with Frost

02 - Days with Thunderstorms
02 - Thunderstorms

00 - Days with some type of Snowfall

 Precipitation Data
TOTAL FOR THE MONTH:  2.75"
DEPARTURE FROM NORMAL: -1.87" or 60%
GREATEST DAILY: 1.74" on the 24th
GREATEST IN 24-HR PERIOD: 1.92" on the 24th-25th
AVERAGE DAILY: 0.09"
NORMAL DAILY:   0.15"
# DAYS WITH MEASURABLE PRECIPITATION:  6
YEAR-TO-DATE: 28.87"  DEPARTURE: -8.99" or 76% of the norm

MAXIMUM FOR SEPTEMBER:  21.91" in 1999 --> (since
MINIMUM FOR SEPTEMBER:    0.26" in 1978 -->  1976)
NORMAL FOR SEPTEMBER:   4.69"

Snowfall, Ice Pellets
TOTAL FOR THE MONTH: 0.0"
GREATEST IN 24 HOURS: 0.0" on the ---
GREATEST DEPTH ON GROUND: 0.0" on the ---
SEPTEMBER MAX = 0.0" in ----

Number of Days:
WITH 0.01" OR MORE PRECIP: 6
WITH 0.10" OR MORE PRECIP: 5
WITH 0.50" OR MORE PRECIP: 1
WITH 1.00" OR MORE PRECIP: 1

Pressure Data
HIGHEST SEA-LEVEL:  30.218" on the 6th
LOWEST SEA-LEVEL:   29.761" on the 24th

Wind
PEAK WIND GUST: 30 mph from the N on the 30th
AVERAGE SPEED: 2.20 mph from a dominant N

 
  • SEPTEMBER STATION RECORDS:
  • 14th - Daily max wind gust - 26 mph (previously 25 mph in 1995)
  • 15th - Daily minimum maximum temperature - 69° (previously 71° in 1983)
  • 24th - Daily precipitation - 1.74" (previously 0.46" in 1979)
  • 27th - Daily minimum temperature - 51° (previously 53° in 1978)
  • 30th - Daily minimum maximum temperature - 62° (previously 63° in 1992)
    		•

    YEAR-TO-DATE 2001 through 9/30
    [next update 11/1/2001]

    Temperature Data
    AVERAGE HIGH : 71.1º   DEPARTURE:  -1.0º
    AVERAGE LOW :  54.3º   DEPARTURE: +0.6º
    MEAN:                    62.7º  DEPARTURE:   -0.2º

    HIGHEST: 96° on the 9th and 10th of August
    LOWEST:  22º on 4th of January

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

    Heating Degree Days
    TOTAL:  2129.0

    Cooling Degree Days
    TOTAL:   1496.5

    NUMBER OF:

    031 - Days Cloudy
    176-  Days Partly Cloudy
    066 - Days Clear or Sunny

    117 - Days with Fog/Ground Fog
    005 - Days with Dense Fog

    12 - Days with Frost

    24 - Days with Thunderstorms
    28 - Thunderstorms

    05 - Days with some type of Snowfall

    		 Precipitation Data
    TOTAL:  28.87"
    DEPARTURE FROM NORMAL:   -8.99" or 76%
    GREATEST DAILY: 2.18" on the 16th of June
    GREATEST IN 24-HR PERIOD: 2.18" on the 16th of June
    AVERAGE DAILY: 0.11"
    NORMAL DAILY: 0.14"
    # DAYS WITH MEASURABLE PRECIPITATION:  88 or 32.23%

    MAXIMUM:  5.26" in June
    MINIMUM:   1.51" in January

    Snowfall, Ice Pellets
    TOTAL: 0.6" 
    GREATEST IN 24 HOURS: 0.3" on February 22nd & March 6th
    GREATEST DEPTH ON GROUND: 0.3" on February 22nd & March 6th

    Number of Days:

    WITH 0.01" OR MORE PRECIP: 88
    WITH 0.10" OR MORE PRECIP: 56
    WITH 0.50" OR MORE PRECIP: 19
    WITH 1.00" OR MORE PRECIP: 8

    Pressure Data
    HIGHEST SEA-LEVEL: 30.660" on February 11th
    LOWEST SEA-LEVEL:  29.474" on March 6th

     
    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


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