January & 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:   JANUARY             Year: 2000 
Latitude: 36° 50'N    Longitude: 76° 18'W  (OFFICIAL CITY)  
Station Elevation: 20 FT  
Standard Time: EASTERN STANDARD
 
  Temperature Degree Days Precipitation     Wind    Weather Weather Peak Wind 
Date Max Min Mn Dep HDD CDD Total Snow Depth Avg Dir Types Types Speed Dir
1
65
38
51.5
+8
13.5
0
 
0.0
0
2.5
S
SU
FG+(AM)
-BR
MILD
16
S
2
70
44
57.0
+14
8.0
0
 
0.0
0
4.7
S
PC
BR MILD
23
SSW
3
73
57
65.0
+22
0
0
 
0.0
0
8.8
S
PC
MILD
24
SSW
4
76
53
64.5
+22
0.5
0
0.52
0.0
0
11.0
S
PC
MILD
SHRA
FROPA
33
SSW
5
54
37
45.5
+6
19.5
0
0.06
0.0
0
6.1
N
PC
BREEZY
COLDER
26
N
6
51
32
41.5
+1
23.5
0
 
0.0
0
1.5
NE
PC
-FROST
14
NE
7
55
35
45.0
+1
20.0
0
0.06
0.0
0
2.8
WNW
PC
-SHRA(AM)
BR
19
W
8
51 
30
40.5
+1 
24.5 
 
0.0
0
1.9 
SU 
FROST
-BR
12 
NE 
9
54
44
49.0 
+10 
16.0 
 0.32 
 0.0 
1.6 
-RA BR 
13 
SSW 
10
62 
51
56.5 
+18 
8.5 
 0.84 
 0.0 
6.6 
SSW 
PC 
-RA TSRA
BR
+FG
FROPA
29 
SSW 
11
68 
45 
56.5 
+19 
8.5 
 
 0.0 
8.8 
SSW 
PC 
-BR
FROPA
34 
WSW 
12
56
33
 44.5 
+5 
20.5 
 
0.0 
3.1 
SSW 
SU 
 
16 
SSW 
13
68
36
52 
+12 
13.0 
 
0.0 
11.2 
PC 
WINDY
FROPA
49 
N 
14
37
28 
32.5 
-7 
32.5 
 
0.0 
9.3 
SU 
BREEZY
COLD
29 
N 
15
40
26 
33 
-6 
32.0 
 TRACE
TRACE 
5.5 
PC 
COLD
-SG
-SHSN 
19 
N 
16
57
37
47 
+9 
18.0 
 
0.0 
9.7 
WSW
PC
MILDER
FROPA
29 
N 
17
43
23 
33 
-5 
32.0 
 
0.0
10.0 
SU 
WINDY
COLD
31 
N 
18
30
23 
26.5 
-14 
38.5 
0.08 
0.1 
 0.1
4.8 
C
COLD
-SG
-SN
19 
N 
19
 39 
22 
30.5 
-7 
34.5 
TRACE 
TRACE 
3.8 
PC 
-SHSN
(AM)
20 
N 
20
40
29
34.5 
-3 
30.5 
0.23 
2.0 
2.0 
7.3 
NW 
PC
BR
SN
-RA, FROPA
33
NW 
21
32
23
27.5 
-10 
37.5 
 
0.0 
8.8 
NW 
SU 
BREEZY
COLD
26 
w 
22
31
19 
25.0 
-13 
40.0 
 
0.0 
3.5 
NNW 
-PC 
COLD 
12 
VRB 
23
36
29 
32.5 
-9 
32.5 
0.21 
0.6 
0.6 
3.4 
C
-SN-PE
-RA BR
FROPA
17 
N 
24
36 
33 
34.5 
-8 
30.5 
0.43 
 0.0
11.3 
C
 BREEZY
BR
-DZ RA 
41 
N
25
35
29 
32.0 
-9 
33.0 
0.86 
4.0 
4.0 
10.8 
BR 
RA PL
SN BLSN
60 
N 
26
30 
25 
27.5 
-11 
37.5 
 
0.0 
4.0 
4.8 
-PC 
VERY
COLD
23 
N 
27
28 
19
23.5 
-16 
41.5 
 
0.0 
3.0 
6.5 
WNW 
SU 
VERY
COLD
24 
NNW 
28
31 
12 
21.5
-18 
43.5 
 
0.0 
2.0 
3.9 
SU 
BITTER
COLD
18 
W 
29
33 
24 
28.5 
-10 
36.5 
 
0.0 
1.5 
4.5 
-PC 
COLD 
17 
NNE 
30
46 
27 
36.5 
-3 
28.5 
1.19 
0.0 
5.1 
WNW 
C
PL-ZR
RA BR
FROPA
20 
WNW 
31
38 
29 
36.5 
-7 
31.5 
 
0.0 
0.0 
8.3 
PC 
COLD 
27 
W 
 
Temperature Data 
AVERAGE HIGH : 47.3º     DEPARTURE: -1.1º 
AVERAGE LOW : 32.0º    DEPARTURE:  +0.5º 
MEAN: 39.6º  DEPARTURE:  -0.3º 
  
HIGHEST: 76º on 4th 
LOWEST: 12º on 28th 

Number of Days: 
MAX 100º OR ABOVE: 0 
MAX 32º OR BELOW:  6 
MAX 90º OR ABOVE:   0  
MIN 32º OR BELOW: 18  
MIN 0º OR BELOW:     0  

Heating Degree Days 
TOTAL THIS MONTH: 786.5 from 30 days 
SEASONAL TOTAL: 1811.0 

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

Precipitation Data  
TOTAL FOR THE MONTH: 4.80"  
DEPARTURE FROM NORMAL:  +0.67" or 116% 
GREATEST DAILY: 1.19" on the 30th 
GREATEST IN 24- HR PERIOD: 1.29"  on the 24th-25th  
5PM-5PM  
AVERAGE DAILY: 0.15" 
NORMAL DAILY: 0.13" 
# DAYS WITH MEASURABLE PRECIPITATION:  11 
YEAR-TO-DATE: 4.80"  DEPARTURE: +0.67" or 116% of the normal 

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

Snowfall, Ice Pellets  
TOTAL FOR THE MONTH: 6.70"  
GREATEST IN 24 HOURS: 4.00" on the 25th 
GREATEST DEPTH ON GROUND: 4.0" 

JANUARY MAX = 8.9" in 1980 

Number of Days: 
WITH 0.01" OR MORE PRECIP: 11 
WITH 0.10" OR MORE PRECIP: 8  
WITH 0.50" OR MORE PRECIP: 4 
WITH 1.00" OR MORE PRECIP: 1 

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

NUMBER OF: 

Days Cloudy:                                                 6 
Days Partly Cloudy:                                    17 
Days Clear or Sunny:                                  8 
Days with Fog/Ground Fog:                       11 
Days with Dense Fog:                                 2 
Days with Frost:                                           2 
Days with Thunderstorms:                       1  
Thunderstorms:                                          1 
Days with some type of Snowfall:           7

 

 
 
 
 
 

 

YEAR-TO-DATE 2000 [through 1/31/00]
Temperature Data 
AVERAGE HIGH : 47.3º     DEPARTURE: -1.1º 
AVERAGE LOW : 32.0º    DEPARTURE:  +0.5º 
MEAN: 39.6º  DEPARTURE:  -0.3º 
  
HIGHEST: 76º on 4th 
LOWEST: 12º on 28th 

Number of Days: 
MAX 100º OR ABOVE: 0 
MAX 32º OR BELOW:  6 
MAX 90º OR ABOVE:   0  
MIN 32º OR BELOW: 18  
MIN 0º OR BELOW:     0  

Heating Degree Days 
 TOTAL:  786.5 

Cooling Degree Days 
TOTAL:        

NUMBER OF: 

Days Cloudy:                                                 6 
Days Partly Cloudy:                                    17 
Days Clear or Sunny:                                  8 
Days with Fog/Ground Fog:                       11 
Days with Dense Fog:                                 2 
Days with Frost:                                           2 
Days with Thunderstorms:                       1  
Thunderstorms:                                          1 
Days with some type of Snowfall:           7

Precipitation Data  
TOTAL: 4.80"  
DEPARTURE FROM NORMAL:  +0.67" or 116% 
GREATEST DAILY: 1.19" on the January 30th 
GREATEST IN 24- HR PERIOD: 1.29"  on January 24th-25th  
5PM-5PM  
AVERAGE DAILY: 0.15" 
NORMAL DAILY: 0.13" 
# DAYS WITH MEASURABLE PRECIPITATION:  11 

MAXIMUM:  4.80" in January
MINIMUM:   4.80" in January 

Snowfall, Ice Pellets  
TOTAL: 6.70"  
GREATEST IN 24 HOURS: 4.00" on January 25th 
GREATEST DEPTH ON GROUND: 4.0" on January 25th

Number of Days: 
WITH 0.01" OR MORE PRECIP: 11 
WITH 0.10" OR MORE PRECIP: 8  
WITH 0.50" OR MORE PRECIP: 4 
WITH 1.00" OR MORE PRECIP: 1 

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, 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;
 
JANUARY 2000 MONTHLY STATION RECORDS:  

New daily rainfall records: 

  • 1.19" on the 30th
New daily snowfall records: 
  • 0.6" on the 23rd (old record TRACE)
  • 4.0" on the 25th (no previous record)
New wind records: 
  • 49 MPH on the 13th (old record 33 MPH in 1983)
  • 60 MPH on the 25th (old record 33 MPH in 1998)
New maximum temperature records: 
  • 73º  on the 3rd (old record 69º/1997)
  • 76º on the 4th (old record 71º/1997)
  • 68º on the 11th (old record 66º in 1980)
New minimum temperature record: 
  • 12º on the 28th (tie of previous station record set in 1986)
New maximum minimum temperature records:  
  • 57º on the 3rd (old record 52º/1992)
  • 53º on the 4th (old record 50º in 1992)
  • 51º on the 10th (old record 50º in 1992)  
New minimum maximum temperature records: 
  • 31º on the 22nd (tied previous record in 1984)
  • 36º on the 24th (old record 38º in 1986)
  • 35º on the 25th (old record 37º in 1987)
  • 30º on the 26th (old record 37º in 1987)
  • 28º on the 27th (tied previous record in 1982)
 
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 (as in -x.x degrees) 
MI Shallow  
PR Partial


January 2000 Temperature Graph
January 2000 Rain/Relative Humidity Graph
January 2000 Wind Graph
January 2000 Barometer & Wind Graph


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