April & 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:   APRIL     Year: 2000
Latitude: 36° 50'N    Longitude: 76° 18'W  (OFFICIAL CITY) 
Station Elevation: 20 FT 
Standard Time: EASTERN STANDARD/EASTERN DAYLIGHT

 
  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
72
37
54.5
-2
10.5
 
0.0
0.0
0
3.6
S
PC
 
14
SSW
2
70
49
59.5
+3
5.5
 
T
0.0
0
6.7
S
C
-SHRA
24
SSW
3
81
62
71.5
+14
 
6.5
T
0.0
0
8.4
SSW
PC
-SHRA
24
SSW
4
73
53
63.0
+4
2.0
 
T
0.0
0
11.1
SSW
PC
-SHRA FROPA
29
SSW
5
63
41
52.0
-4
13.0
 
0.0
0.0
0
9.0
W
SU
 
30
NW
6
80
45
62.5
+7
2.5
 
0.0
0.0
0
8.7
SSW
SU
BREEZY
29
SW
7
84
54
69.0
+13
 
4.0
0.0
0.0
0
9.2
SSW
SU
BREEZY
20
S
8
81
47
64.0
+7
1.0
 
0.44
0.0
0
10.5
SSW
PC
SHRA FROPA
30
SSW
9
58
38
48.0
-8
17.0
  
0.24
0.0
0
9.5
W
PC
SHRA(AM)
WINDY
33
W
10
72
41
56.5
+1
8.5
 
0.0
0.0
0
5.8
WSW
SU
 
23
WSW
11
77
53
65.0
+8
 
 
T
0.0
0
7.9
SSW
PC
SHRA
25
SSW
12
68
52
60.0
+1
5.0
 
0.01
0.0
0
8.8
NNE
PC
FROPA SHRA
25
NNE
13
52
46
49.0
-9
16.0
 
0.01
0.0
0
8.0
NE
C
-DZ -SHRA
24
NE
14
58
47
52.5
-5
12.5
 
0.02
0.0
0
6.1
NE
C
-DZ-RA BR
21
NE
15
68
56
62
+3
3.0
 
1.19
0.0
0
3.2
SE
C
RA SHRA BR
17
SSW
16
74
62
68
+8
 
3.0
0.01
0.0
0
3.0
WSW
PC
SHRA BR
16
N
17
63
56
59.5
0
5.5
 
0.31
0.0
0
3.2
SSE
PC
FROPA TSRA BR
16
NE
18
60
49
54.5
-3
10.5
 
0.93
0.0
0
8.3
N
C
TSRA BR SHRA
29
N
19
53
48
50.5
-9
14.5
 
0.02
0.0
0
10.8
N
PC
-SHRA BR
32
N
20
70
46
58.0
-2
7.0
 
0.0
0.0
0
4.0
SE
PC
 
14
SE
21
77
55
66.0
+5
 
1.0
0.01
0.0
0
6.6
S
PC
DST LTG SHRA
22
S
22
62
52
57.0
-3
8.0
 
0.11
0.0
0
5.3
N
C
SHRA BR
20
N
23
66
52
59.0
-1
6.0
 
0.0
0.0
0
4.8
N
PC
 
21
N
24
70
47
58.5
-3
6.5
 
0.01
0.0
0
3.1
NE
PC
-SHRA (PM)
17
N
25
56
46
51.0
-10
14.0
 
0.53
0.0
0
9.7
N
C
RA BR WINDY
31
N
26
57
46
51.5
-10
13.5
 
0.01
0.0
0
5.9
N
PC
-SHRA BR
21
N
27
62
43
52.5
-10
12.5
  
0.02
0.0
0
2.4
SSE
PC
BR SHRA
14
S
28
65
46
55.5
-6
9.5
 
0.03
0.0
0
3.0
SSE
PC
-SHRA BR FG+
15
ENE
29
64
50
57.0
-4
8.0
 
0.00
0.0
0
4.0
N
PC
BR FROPA
16
N
30
71
50
60.5
-2
4.5
 
0.00
0.0
0
4.5
W
SU
 
21
N

 
Temperature Data
AVERAGE HIGH : 67.6º     DEPARTURE:   -1.9º
AVERAGE LOW :  49.0º     DEPARTURE:  +0.8º
MEAN:                    58.3º     DEPARTURE:   -0.6º

HIGHEST: 84º on 7th
LOWEST:  37º on 1st

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

Heating Degree Days
TOTAL THIS MONTH: 216.5 from 25 days
SEASONAL TOTAL:   2952.0

Cooling Degree Days
TOTAL THIS MONTH: 14.5 from 4 days
SEASONAL TOTAL:    25.0

NUMBER OF:

Days Cloudy:                                               7
Days Partly Cloudy:                                  18
Days Clear or Sunny:                                5
Days with Fog/Ground Fog:                     12
Days with Dense Fog:                               1
Days with Frost:                                         0
Days with Thunderstorms:                     2
Thunderstorms:                                         2
Days with some type of Snowfall:         0

 Precipitation Data
TOTAL FOR THE MONTH: 3.90"
DEPARTURE FROM NORMAL: +0.43" or 112%
GREATEST DAILY: 1.19" on the 15th
GREATEST IN 24- HR PERIOD: 1.24"  on the 17th-18th, from 9 PM TO 9 PM
AVERAGE DAILY: 0.13"
NORMAL DAILY:   0.12"
# DAYS WITH MEASURABLE PRECIPITATION:  17
YEAR-TO-DATE: 12.91"  DEPARTURE: -2.33" or 85% of the normal

MAXIMUM FOR APRIL:   7.08" in 1991 --> (since
MINIMUM FOR APRIL:    1.21" in 1985 -->  1977)

Snowfall, Ice Pellets
TOTAL FOR THE MONTH: 0.00"
GREATEST IN 24 HOURS: 0.00" on the ---
GREATEST DEPTH ON GROUND: 0.00 on the ---

APRIL MAX = 1.1" in 1983

Number of Days:
WITH 0.01" OR MORE PRECIP: 17
WITH 0.10" OR MORE PRECIP: 7
WITH 0.50" OR MORE PRECIP: 3
WITH 1.00" OR MORE PRECIP: 1

Pressure Data
HIGHEST SEA-LEVEL:  30.525" on the 12th
LOWEST SEA-LEVEL:   29.529" on the 21st

Wind
PEAK WIND GUST: 33 MPH from the W on the 9th
AVERAGE SPEED:  6.4 MPH from a dominant SSW direction

 
APRIL 2000 MONTHLY STATION RECORDS:
  • New Daily Precipitation: 0.93" on the 18th (old record 0.44" in 1978)
  • New Daily Precipitation: 0.53" on the 25th (old record 0.26" in 1977)
  • New Minimum Maximum Temperature: 56º on the 25th

YEAR-TO-DATE 2000 [through 4/30/00; next update 5/31/00]

Temperature Data
AVERAGE HIGH : 58.3º   DEPARTURE: +0.9º
AVERAGE LOW :  40.2º   DEPARTURE: +2.0º
MEAN:                    49.3º  DEPARTURE:  +1.5º

HIGHEST: 84º on 7th of April
LOWEST:  12º on 28th of January

Number of Days:
MAX 100º OR ABOVE: 0
MAX 32º OR BELOW:  6
MAX 90º OR ABOVE:   0
MIN 32º OR BELOW: 26
MIN 0º OR BELOW:     0

Heating Degree Days
 TOTAL:  1927.5 

Cooling Degree Days
TOTAL:        25.0

NUMBER OF:

Days Cloudy:                                                21
Days Partly Cloudy:                                    63
Days Clear or Sunny:                                 37
Days with Fog/Ground Fog:                      42
Days with Dense Fog:                                 5
Days with Frost:                                           7
Days with Thunderstorms:                       4
Thunderstorms:                                          4
Days with some type of Snowfall:           9

 Precipitation Data
TOTAL: 12.91"
DEPARTURE FROM NORMAL:   -2.33" or 85%
GREATEST DAILY: 1.19" on January 30th & April 15th
GREATEST IN 24- HR PERIOD: 1.29"  on January 24th-25th 
5PM-5PM 
AVERAGE DAILY: 0.11"
NORMAL DAILY: 0.13"
# DAYS WITH MEASURABLE PRECIPITATION:  47 or 38.9%

MAXIMUM:  4.80" in January
MINIMUM:   1.29" in February

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

Number of Days:

WITH 0.01" OR MORE PRECIP: 47
WITH 0.10" OR MORE PRECIP: 26
WITH 0.50" OR MORE PRECIP: 9
WITH 1.00" OR MORE PRECIP: 2

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, 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

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

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