January & 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:   JANUARY   Year: 2001
Latitude: 36° 81' N    Longitude: 76° 33' W
Station Elevation: 20 FT 
Standard Time: EASTERN STANDARD 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
37
24
30.5
-13
34.5
 
 
0.0
0
3.3
WNW
-PC
COLD 
14
WNW
2
36
27
31.5
-11
33.5
 
 
0.0
0
6.1
N
PC
FROPA (AM)
23
N
3
36
24
30.0
-13
35.0
 
 
0.0
0
4.7
N
SU
COLD
17
NNE
4
38
22
30.0
-12
35.0
 
 
0.0
0
3.7
N
SU
COLD
16
NE
5
46
25
35.5
-4
29.5
 
 
0.0
0
3.8
SSW
PC
FROST FROPA
19
S
6
48
28
38.0
-3
27.0
 
 
0.0
0
4.7
W
SU
FROST
21
WNW
7
57
30
43.5
0
21.5
 
 
0.0
0
4.8
SSW
PC
 
18
SW
8
49
38
43.5
+4
21.5
 
0.17
0.0
0
3.5
W
C
BR -RA FROPA
17
N
9
39
30
34.5
-4
30.5
 
 
0.0
0
6.5
N
PC
BR COLDER
24
N
10
47
28
37.5
-1
27.5
 
 
0.0
0
7.5
WSW
SU
 
23
WSW
11
62
31
46.5
+9
18.5
 
 
0.0
0
5.1
SW
SU
 
23
WSW
12
47
40
43.5
+4
21.5
 
 
0.0
0
5.8
NNE
C
BR FROPA(AM) COLDER
18
NE
13
46
37
41.5
+1
23.5
 
 
0.0
0
6.3
NNE
SU
BREEZY
19
N
14
60
33
46.5
+7
18.5
 
0.17
0.0
0
2.2
N
C
-FROST SHRA BR
12
N
15
60
46
53.0
+13
12.0
 
0.01
0.0
0
4.3
SSW
PC
+FG BR -SHRA
17
WSW
16
52
40
46.0
+8
19.0
 
 
0.0
0
3.2
N
PC
BR
17
N
17
49
32
40.5
+2
24.5
 
 
0.0
0
2.0
NE
PC
BR -FROST
12
NE
18
45
39
42.0
+2
23.0
 
0.16
0.0
0
1.3
NNE
C
-RA BR COLD DAMP
12
NE
19
67
42
54.5
+17
10.5
 
0.09
0.0
0
4.2
NNE
C
-RA SHRA BR FG
19
NE
20
45
37
41.0
+3
24.0
 
0.70
0.0
0
6.7
N
C
RA DZ BR 
SHRA FROPA
19
N
21
39
28
33.5
-4
31.5
 
0.01
0.0
0
7.2
N
PC
-SHRA -SHSN BR
28
WNW
22
37
25
31.0
-7
34.0
 
 
0.0
0
5.0
NNE
PC
FROST COLDER
15
NNE
23
38
32
35.0
-6
30.0
 
 
0.0
0
8.0
N
SU
FROST COLD
27
N
24
48
32
40.0
-3
25.0
 
 
0.0
0
3.5
N
PC
 
15
N
25
42
31
36.5
-5
28.5
 
 
0.0
0
9.0
N
PC
FROPA WINDY
COLD VIRGA
27
N
26
42
28
35.0
-3
30.0
 
 
0.0
0
5.7
N
PC
 
20
N
27
55
35
45.0
+5
20.0
 
 
0.0
0
8.4
WSW
PC
FROPA
31
WSW
28
48
28
38.0
-2
27.0
 
 
0.0
0
2.6
NNE
-PC
 
14
WSW
29
55
33
44.0
+5
21.0
 
 
0.0
0
2.9
N
PC
 
12
NE
30
67
45
56.0
+15
9.0
 
0.20
0.0
0
9.4
SSW
PC
SHRA BR WINDY
29
SSW
31
66
47
56.5
+16
8.5
 
 
0.0
0
8.0
SSW
SU
FROPA (EVE)
28
W

 
Temperature Data
AVERAGE HIGH :  48.5º     DEPARTURE:     +0.1º
AVERAGE LOW :   32.8º     DEPARTURE:    +1.3º
MEAN:                     40.6º     DEPARTURE:    +0.6º

HIGHEST: 67º on 19th and 30th
LOWEST:  22º on 4th

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

Heating Degree Days
TOTAL THIS MONTH: 755.0 from 31 days
SEASONAL TOTAL:   2275.0

Cooling Degree Days
TOTAL THIS MONTH: 0.0 from 0 days
SEASONAL TOTAL:   1522.5

NUMBER OF:

06 - Days Cloudy
17 - Days Partly Cloudy
08 - Days Clear or Sunny

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

06 - Days with Frost

00 - Days with Thunderstorms
00 - Thunderstorms

01 - Days with some type of Snowfall

Precipitation Data
TOTAL FOR THE MONTH:  1.51"
DEPARTURE FROM NORMAL: -2.51" or 38%
GREATEST DAILY: 0.70" on the 20th
GREATEST IN 24-HR PERIOD: 0.71" on the 20th & 21st
(3 AM - 3 AM)
AVERAGE DAILY: 0.05"
NORMAL DAILY:   0.13"
# DAYS WITH MEASURABLE PRECIPITATION:  8
YEAR-TO-DATE: 1.51"  DEPARTURE: -2.51" or 38% of the norm

MAXIMUM FOR JANUARY:   11.12" in 1987 --> (since
MINIMUM FOR JANUARY:    1.07" in 1981 -->  1977)

Snowfall, Ice Pellets
TOTAL FOR THE MONTH: TRACE
GREATEST IN 24 HOURS: TRACE on the 21st
GREATEST DEPTH ON GROUND: 0.0" on the ----

JANUARY MAX = 8.9" in 1980

Number of Days:
WITH 0.01" OR MORE PRECIP: 8
WITH 0.10" OR MORE PRECIP: 5
WITH 0.50" OR MORE PRECIP: 1
WITH 1.00" OR MORE PRECIP: 0

Pressure Data
HIGHEST SEA-LEVEL:  30.630" on the 22nd
LOWEST SEA-LEVEL:   29.600" on the 30th

Wind
PEAK WIND GUST: 31 mph from the WSW  on the 27th
AVERAGE SPEED: 5.10 mph from a dominant N direction


 
 
JANUARY RECORDS:
  • 2nd driest January in the database beginning 7/1976
  • 2nd - minimum maximum temperature 36o(previous 37o in 1977)
  • 3rd - minimum maximum temperature 36o(previous 37o in 1977)
  • 20th - Maximum daily precipitation - 0.70" (previous 0.68" in 1981)

YEAR-TO-DATE 2001 [next update 2/28/2001]

Temperature Data
AVERAGE HIGH : 48.5º   DEPARTURE: +0.1º
AVERAGE LOW :  32.8º   DEPARTURE: +1.3º
MEAN:                    40.6º  DEPARTURE:  +0.6º

HIGHEST: 67º on 19th and 30th of January
LOWEST:  22º on 4th of January

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

Heating Degree Days
TOTAL:  755.0

Cooling Degree Days
TOTAL:   0.0

NUMBER OF:

006 - Days Cloudy
017 - Days Partly Cloudy
008 - Days Clear or Sunny

012 - Days with Fog/Ground Fog
002 - Days with Dense Fog

06 - Days with Frost

00 - Days with Thunderstorms
00 - Thunderstorms

01 - Days with some type of Snowfall

Precipitation Data
TOTAL: 1.51"
DEPARTURE FROM NORMAL:   -2.51" or 38%
GREATEST DAILY: 0.70" on January 20th
GREATEST IN 24-HR PERIOD: 0.71" on the 20th & 21st of January (3 AM - 3 AM)
AVERAGE DAILY: 0.05"
NORMAL DAILY: 0.13"
# DAYS WITH MEASURABLE PRECIPITATION:  08 or 25.81%

MAXIMUM:  1.51" in January
MINIMUM:   1.51" in January

Snowfall, Ice Pellets
TOTAL: TRACE
GREATEST IN 24 HOURS: TRACE on January 21st
GREATEST DEPTH ON GROUND: 0.0" on -----

Number of Days:

WITH 0.01" OR MORE PRECIP: 8
WITH 0.10" OR MORE PRECIP: 5
WITH 0.50" OR MORE PRECIP: 1
WITH 1.00" OR MORE PRECIP: 0

Pressure Data
HIGHEST SEA-LEVEL: 30.630" on the January 22nd
LOWEST SEA-LEVEL:  29.600" on the January 30th


 
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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