April & 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:   APRIL   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
51
43
47.0
-9
18.0
 
0.20
0.0
0
6.2
N
PC
BR SHRA
24
N
2
60
44
52.0
-4
13.0
 
T
0.0
0
4.6
N
PC
-SHRA BR FROPA
20
WSW
3
58
41
49.5
-7
15.5
 
0.04
0.0
0
1.5
N
PC
BR SHRA
11
N
4
55
43
49.0
-10
16.0
 
 
0.0
0
5.3
NNE
PC
BR
18
N
5
64
36
50.0
-6
15.0
 
 
0.0
0
3.2
SE
PC
BR -FROST
17
NE
6
76
45
60.5
+5
4.5
 
 
0.0
0
8.0
SSW
SU
BRERZY MILDER
29
SSW
7
82
55
68.5
+12
 
3.5
 
0.0
0
6.6
W
PC
FROPA BR
22
NE
8
83
54
68.5
+11
 
3.5
 
0.0
0
4.2
W
PC
BR SEABREEZE
22
W
9
87
61
74.0
+17
 
9.0
 
0.0
0
3.6
S
SU
WARM
15
WSW
10
74
54
64.0
+8
1.0
 
 
0.0
0
4.8
NNE
PC
FROPA COOLER
29
W
11
71
53
62.0
+5
3.0
 
0.30
0.0
0
4.0
N
C
BR TSRA
18
N
12
84
58
71.0
+12
 
6.0
 
0.0
0
5.8
SSW
PC
BR WARM
23
SSW
13
75
63
69.0
+10
 
4.0
0.22
0.0
0
3.8
S
PC
SHRA BR FROPA
19
W
14
71
55
63.0
+5
2.0
 
 
0.0
0
4.0
N
SU
 
17
N
15
80
55
67.5
+8
 
2.5
0.01
0.0
0
5.0
SSW
PC
-SHRA
22
SSW
16
65
49
57.0
-3
8.0
 
T
0.0
0
6.5
N
PC
FROPA -SHRA
26
N
17
49
40
44.5
-15
20.5
 
0.23
0.0
0
5.7
N
C
SHRA TSRA 
BR FROPA
27
N
18
52
36
43.5
-13
21.5
 
 
0.0
0
7.4
WSW
PC
VIRGA
25
NNW
19
64
34
49.0
-10
16.0
 
 
0.0
0
3.5
NW
SU
VERY -FROST
20
WSW
20
73
46
59.5
0
5.5
 
 
0.0
0
6.0
S
PC
 
21
SSW
21
80
58
69.0
+7
 
4.0
 
0.0
0
7.1
SSW
PC
 
22
SSW
22
83
60
71.5
+11
 
6.5
 
0.0
0
6.6
SSW
SU
PLEASANT
22
SSW
23
85
61
73.0
+12
 
8.0
 
0.0
0
5.8
S
SU
WARM
22
SSW
24
85
58
71.5
+10
 
6.5
T
0.0
0
7.7
SSW
PC
FROPA -SHRA
24
N
25
58
48
53.0
-8
12.0
 
0.71
0.0
0
6.0
NNE
C
RA BR COLDER
22
N
26
60
47
53.5
-8
11.5
 
 
0.0
0
8.9
N
SU
BREEZY CHILLY
27
N
27
78
42
60.0
-2
5.0
 
 
0.0
0
3.8
W
SU
PLEASANT
20
WSW
28
66
51
58.5
-3
6.5
 
 
0.0
0
5.5
N
PC
FROPA BREEZY COOLER
25
N
29
64
43
53.5
-7
11.5
 
 
0.0
0
2.6
NE
SU
-BR
14
NE
30
76
42
59.0
-3
6.0
 
 
0.0
0
2.5
WSW
SU
 
16
NE

 
Temperature Data
AVERAGE HIGH :  70.3º     DEPARTURE:     +0.8º
AVERAGE LOW :   49.2º     DEPARTURE:     +0.9º
MEAN:                     59.7º     DEPARTURE:     +0.8º

HIGHEST: 87º on the 9th
LOWEST:  34º on the 19th

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: 211.5 from 20 days
SEASONAL TOTAL:   3582.5

Cooling Degree Days
TOTAL THIS MONTH: 53.5 from 10 days
SEASONAL TOTAL:   56.0

NUMBER OF:

03 - Days Cloudy
17 - Days Partly Cloudy
10 - Days Clear or Sunny

13 - Days with Fog/Ground Fog
00 - Days with Dense Fog

02 - Days with Frost

02 - Days with Thunderstorms
02 - Thunderstorms

00 - Days with some type of Snowfall

 Precipitation Data
TOTAL FOR THE MONTH:  1.71"
DEPARTURE FROM NORMAL: -1.69" or 50%
GREATEST DAILY: 0.71" on the 25th
GREATEST IN 24-HR PERIOD: 0.71" on the 25th
AVERAGE DAILY: 0.06"
NORMAL DAILY:   0.11"
# DAYS WITH MEASURABLE PRECIPITATION:  7
YEAR-TO-DATE: 9.75"  DEPARTURE: -5.23" or 65% of the norm

MAXIMUM FOR ARPIL:   7.08" in 1991 --> (since
MINIMUM FOR APRIL:   1.21" in 1985 -->  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 ---
APRIL MAX = 1.1" in 1983

Number of Days:
WITH 0.01" OR MORE PRECIP: 7
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:  30.526" on the 29th
LOWEST SEA-LEVEL:   29.496" on the 16th

Wind
PEAK WIND GUST: 29 mph from the SSW on the 6th & 
from the W on the 10th
AVERAGE SPEED: 5.2 mph from a dominant N direction

 
  • APRIL RECORDS:
  • 9th - Daily high temperature 87° (previously 86° in 1991)
  • 12th - Daily maximum minimum temperature 58° (previously 55° in 1992)
  • 17th - Tie of daily minimum maximum temperature 49° (previously in 1986)
  • 19th - Daily minimum temperature 34° (previously 35° in 1983)
  • 25th - Daily precipitation 0.71" (previously 0.53" in 2000)
    		•

    YEAR-TO-DATE 2001 through 4/30
    [next update 6/1/2001]

    Temperature Data
    AVERAGE HIGH : 57.0º   DEPARTURE: -0.3º
    AVERAGE LOW :  39.6º   DEPARTURE: +1.3º
    MEAN:                    48.3º  DEPARTURE:  +0.5º

    HIGHEST: 87° on 9th of April
    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:  2062.5

    Cooling Degree Days
    TOTAL:   56.0

    NUMBER OF:

    022 - Days Cloudy
    062 - Days Partly Cloudy
    036 - Days Clear or Sunny

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

    12 - Days with Frost

    04 - Days with Thunderstorms
    04 - Thunderstorms

    05 - Days with some type of Snowfall

    		 Precipitation Data
    TOTAL: 9.75"
    DEPARTURE FROM NORMAL:   -5.23" or 65%
    GREATEST DAILY: 1.27" on the 21st of March
    GREATEST IN 24-HR PERIOD: 1.27" on the 21st of March
    AVERAGE DAILY: 0.08"
    NORMAL DAILY: 0.12"
    # DAYS WITH MEASURABLE PRECIPITATION:  41 or 34.17%

    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: 41
    WITH 0.10" OR MORE PRECIP: 24
    WITH 0.50" OR MORE PRECIP: 8
    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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