May & 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:   May   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
84
52
68.0
+4
  
 3.0 
0.00
0.0
0
4.0
S
SU
 
16
S
2
85
57
71.0
+8
 
6.0
0.00
0.0
0
4.7
S
SU
 
14
WSW
3
88
58
73.0
+9
 
8.0
0.00
0.0
0
4.4
S
SU
 
14
S
4
87
60
73.5
+9
 
8.5
0.00
0.0
0
4.8
S
SU
WARM
13
S
5
88
61
74.5
+11
 
9.5
0.00
0.0
0
5.2
S
PC
HZ WARM
FROPA
21
N
6
66
53
59.5
-6
5.5
 
0.00
0.0
0
8.3
NE
PC
BREEZY COOLER
29
NE
7
62
52
57.0
-8
8.0
 
0.00
0.0
0
6.4
NNE
PC
COOL
22
NE
8
72
51
61.5
-3
3.5
 
0.00
0.0
0
3.3
NNE
PC
 
17
NNE
9
75
50
62.5
-2
2.5
 
0.00
0.0
0
2.3
N
PC
 
15
N
10
82
55
68.5
+3
 
3.5
0.00
0.0
0
3.0
N
SU
-BR
15
N
11
88
60
74.0
+8
 
9.0
0.00
0.0
0
4.0
S
SU
WARM
18
W
12
89
65
77.0
+9
 
12.0
0.66
0.0
0
4.6
S
PC
HZ TS 
FROPA BR
24
N
13
68
56
62.0
-5
3.0
 
0.00
0.0
0
5.5
N
PC
COOLER
22
N
14
70
50
60.0
-6
5.0
 
0.00
0.0
0
3.2
N
SU
PLEASANT
21
N
15
69
50
59.5
-7
5.5
 
T
0.0
0
2.8
W
PC
GF -SHRA
18
W
16
68
50
59.0
-7
6.0
 
0.00
0.0
0
3.5
NNE
PC
 
18
NE
17
68
54
61.0
-7
4.0
 
T
0.0
0
2.5
NE
C
-SHRA
13
NE
18
76
60
68.0
-2
  
3.0
T
0.0
0
2.3
S
PC
BR HZ -SHRA
12
NNE
19
75
63
69.0
-1
 
4.0
0.05
0.0
0
3.1
N
PC
SHRA BR 
HZ FROPA
16
N
20
72
63
67.5
-1
 
2.5
0.09
0.0
0
2.6
NE
C
BR HZ
SHRA DZ
15
NE
21
82
64
73.0
+3
 
8.0
1.03
0.0
0
5.3
S
PC
BR SHRA TS
16
S
22
87
70
78.5
+10
 
13.5
0.01
0.0
0
5.4
S
PC
BR HZ SHRA
DST LTG
35
W
23
75
64
69.5
-1
 
4.5
0.00
0.0
0
3.9
N
PC
FROPA (AM)
19
N
24
82
58
70.0
-2
 
5.0
0.00
0.0
0
0.2
N
SU
+FG
13
WSW
25
87
61
74.0
+3
 
9.0
0.05
0.0
0
1.7
SE
PC
BR HZ 
TSRA SHRA
19
SSE
26
82
62
72.0
+2
 
7.0
1.21
0.0
0
 
 
PC
BR HZ 
TS SHRA
20
N
27
81
60
70.5
+3
 
5.5
0.12
0.0
0
 
 
PC
SHRA BR
 
 
28
71
64
67.5
-1
 
2.5
0.12
0.0
0
 
 
PC
BR SHRA
 
 
29
74
62
68.0
-3
 
3.0
0.12
0.0
0
 
 
PC
BR SHRA HZ
15
 
30
74
59
66.5
-5
 
1.5
0.00
0.0
0
 
 
PC
BR
18
 
31
73
54
63.5
-10
1.5
 
0.00
0.0
0
 
 
PC
 
16
 

 
Temperature Data
AVERAGE HIGH :  77.4º     DEPARTURE:     -0.1º
AVERAGE LOW :   58.0º     DEPARTURE:     +0.4º
MEAN:                     67.7º     DEPARTURE:     +0.2º

HIGHEST: 89º on the 12th
LOWEST:  50º on the 9th, 14th, 15th, & 16th

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: 44.5 from 10 days
SEASONAL TOTAL:   3627.0

Cooling Degree Days
TOTAL THIS MONTH: 128.5 from 21 days
SEASONAL TOTAL:   184.5

NUMBER OF:

02 - Days Cloudy
20 - Days Partly Cloudy
09 - Days Clear or Sunny

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

00 - Days with Frost

04 - Days with Thunderstorms
04 - Thunderstorms

00 - Days with some type of Snowfall

 Precipitation Data
TOTAL FOR THE MONTH:  3.46"
DEPARTURE FROM NORMAL: -0.56" or 86%
GREATEST DAILY: 1.21" on the 26th
GREATEST IN 24-HR PERIOD: 1.21" on the 26th
AVERAGE DAILY: 0.11"
NORMAL DAILY:   0.13"
# DAYS WITH MEASURABLE PRECIPITATION:  10
YEAR-TO-DATE: 13.21"  DEPARTURE: -5.79" or 70% of the norm

MAXIMUM FOR MAY:   8.06" in 1988 --> (since
MINIMUM FOR MAY:    1.02" in 1986 -->  1977)

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 ---
MAY MAX = 0.0" in ----

Number of Days:
WITH 0.01" OR MORE PRECIP: 10
WITH 0.10" OR MORE PRECIP: 6
WITH 0.50" OR MORE PRECIP: 3
WITH 1.00" OR MORE PRECIP: 2

Pressure Data
HIGHEST SEA-LEVEL:  30.450" on the 7th
LOWEST SEA-LEVEL:   29.720" on the 22nd

Wind
PEAK WIND GUST: 35 mph from the W on the 22nd
AVERAGE SPEED: 4.09 mph from a dominant S direction (THROUGH THE 25TH - INCOMPLETE FOR THE MONTH)

 
  • MAY RECORDS:
  • 4th - Daily station maximum temperature TIE - 87° (previously in 1996)
  • 5th - Daily station maximum temperature - 88° (previously 87° in 1980)
  • 21st - Daily precipitation 1.03" (previously 0.68" in 1982)
  • 22nd - Maximum minimum temperature 70° (previously 68° in 1984)
  • 26th - Daily precipitation 1.21" (previously 0.98" in 1994)
    		•

    YEAR-TO-DATE 2001 through 5/31
    [next update 7/1/2001]

    Temperature Data
    AVERAGE HIGH : 61.2º   DEPARTURE:  -0.2º
    AVERAGE LOW :  43.3º   DEPARTURE: +1.1º
    MEAN:                    52.3º  DEPARTURE:  +0.5º

    HIGHEST: 89° on the 12th of May
    LOWEST:  22º on 4th of January

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

    Heating Degree Days
    TOTAL:  2107.0

    Cooling Degree Days
    TOTAL:   184.5

    NUMBER OF:

    024 - Days Cloudy
    082 - Days Partly Cloudy
    045 - Days Clear or Sunny

    061 - Days with Fog/Ground Fog
    003 - Days with Dense Fog

    12 - Days with Frost

    08 - Days with Thunderstorms
    08 - Thunderstorms

    05 - Days with some type of Snowfall

    		 Precipitation Data
    TOTAL: 13.21"
    DEPARTURE FROM NORMAL:   -5.79" or 70%
    GREATEST DAILY: 1.27" on the 21st of March
    GREATEST IN 24-HR PERIOD: 1.27" on the 21st of March
    AVERAGE DAILY: 0.09"
    NORMAL DAILY: 0.13"
    # DAYS WITH MEASURABLE PRECIPITATION:  51 or 33.11%

    MAXIMUM:  4.33" in March
    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: 51
    WITH 0.10" OR MORE PRECIP: 30
    WITH 0.50" OR MORE PRECIP: 11
    WITH 1.00" OR MORE PRECIP: 1

    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;

     
    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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