WFO Monthly/Daily Climate Data
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
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CXUS51 KLWX 011438
CF6IAD
PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6)
STATION: WASHINGTON DULLES DC
MONTH: APRIL
YEAR: 2021
LATITUDE: 38 57 N
LONGITUDE: 77 27 W
TEMPERATURE IN F: :PCPN: SNOW: WIND :SUNSHINE: SKY :PK WND
================================================================================
1 2 3 4 5 6A 6B 7 8 9 10 11 12 13 14 15 16 17 18
12Z AVG MX 2MIN
DY MAX MIN AVG DEP HDD CDD WTR SNW DPTH SPD SPD DIR MIN PSBL S-S WX SPD DR
================================================================================
1 49 32 41 -9 24 0 0.27 T 0 17.1 29 320 M M 7 1 40 310
2 45 29 37 -13 28 0 0.00 0.0 0 15.2 28 310 M M 3 38 310
3 56 24 40 -10 25 0 0.00 0.0 0 4.6 15 350 M M 1 20 330
4 73 34 54 3 11 0 0.00 0.0 0 8.8 22 290 M M 3 31 310
5 74 38 56 5 9 0 0.00 0.0 0 5.8 17 310 M M 3 24 330
6 78 45 62 11 3 0 0.00 0.0 0 2.1 10 30 M M 4 17 20
7 83 46 65 13 0 0 0.00 0.0 0 4.3 16 320 M M 4 22 330
8 72 53 63 11 2 0 T 0.0 0 8.5 17 150 M M 6 26 150
9 60 52 56 4 9 0 0.48 0.0 0 5.6 13 100 M M 10 13 15 90
10 70 54 62 9 3 0 0.15 0.0 0 5.4 13 130 M M 10 1 18 120
11 79 60 70 17 0 5 0.13 0.0 0 8.5 21 260 M M 7 13 31 250
12 64 49 57 4 8 0 0.06 0.0 0 5.2 14 140 M M 8 13 29 40
13 68 49 59 5 6 0 T 0.0 0 4.0 14 20 M M 8 8 18 30
14 61 48 55 1 10 0 0.42 0.0 0 3.8 14 210 M M 7 1 20 200
15 64 44 54 0 11 0 0.00 0.0 0 12.1 28 310 M M 6 1 41 320
16 59 35 47 -8 18 0 0.00 0.0 0 11.4 28 290 M M 4 35 290
17 60 38 49 -6 16 0 0.00 0.0 0 6.6 15 330 M M 6 23 310
18 64 42 53 -2 12 0 0.00 0.0 0 4.4 12 300 M M 7 20 300
19 64 47 56 0 9 0 T 0.0 0 5.2 13 190 M M 6 19 160
20 76 46 61 5 4 0 0.00 0.0 0 10.3 21 210 M M 1 30 210
21 63 37 50 -6 15 0 0.00 0.0 0 17.3 37 290 M M 4 49 310
22 53 30 42 -14 23 0 0.00 0.0 0 11.5 30 300 M M 6 41 300
23 65 32 49 -8 16 0 0.00 0.0 0 6.8 18 300 M M 3 25 260
24 64 33 49 -8 16 0 0.52 0.0 0 3.1 21 210 M M 6 1 27 200
25 66 49 58 1 7 0 0.19 0.0 0 11.2 23 300 M M 8 1 35 280
26 69 41 55 -3 10 0 0.00 0.0 0 9.0 21 320 M M 2 29 320
27 85 42 64 6 1 0 0.00 0.0 0 6.3 16 200 M M 6 24 200
28 88 57 73 15 0 8 0.00 0.0 0 5.6 15 290 M M 7 21 250
29 83 65 74 16 0 9 0.05 0.0 0 7.0 30 320 M M 9 40 330
30 72 50 61 2 4 0 0.01 0.0 0 22.9 43 320 M M 5 59 340
================================================================================
SM 2027 1301 300 22 2.28 T 249.6 M 167
================================================================================
AV 67.6 43.4 8.3 FASTST M M 6 MAX(MPH)
MISC ----> 43 320 59 340
================================================================================
NOTES:
# LAST OF SEVERAL OCCURRENCES
COLUMN 17 PEAK WIND IN M.P.H.
PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6) , PAGE 2
STATION: WASHINGTON DULLES DC
MONTH: APRIL
YEAR: 2021
LATITUDE: 38 57 N
LONGITUDE: 77 27 W
[TEMPERATURE DATA] [PRECIPITATION DATA] SYMBOLS USED IN COLUMN 16
AVERAGE MONTHLY: 55.5 TOTAL FOR MONTH: 2.28 1 = FOG OR MIST
DPTR FM NORMAL: 1.1 DPTR FM NORMAL: -1.19 2 = FOG REDUCING VISIBILITY
HIGHEST: 88 ON 28 GRTST 24HR 0.85 ON 31- 1 TO 1/4 MILE OR LESS
LOWEST: 24 ON 3 3 = THUNDER
SNOW, ICE PELLETS, HAIL 4 = ICE PELLETS
TOTAL MONTH: T 5 = HAIL
GRTST 24HR T ON 1- 1 6 = FREEZING RAIN OR DRIZZLE
GRTST DEPTH: 0 7 = DUSTSTORM OR SANDSTORM:
VSBY 1/2 MILE OR LESS
8 = SMOKE OR HAZE
[NO. OF DAYS WITH] [WEATHER - DAYS WITH] 9 = BLOWING SNOW
X = TORNADO
MAX 32 OR BELOW: 0 0.01 INCH OR MORE: 10
MAX 90 OR ABOVE: 0 0.10 INCH OR MORE: 7
MIN 32 OR BELOW: 5 0.50 INCH OR MORE: 1
MIN 0 OR BELOW: 0 1.00 INCH OR MORE: 0
[HDD (BASE 65) ]
TOTAL THIS MO. 300 CLEAR (SCALE 0-3) 6
DPTR FM NORMAL -35 PTCLDY (SCALE 4-7) 21
TOTAL FM JUL 1 4008 CLOUDY (SCALE 8-10) 3
DPTR FM NORMAL -566
[CDD (BASE 65) ]
TOTAL THIS MO. 22
DPTR FM NORMAL 5 [PRESSURE DATA]
TOTAL FM JAN 1 26 HIGHEST SLP 30.48 ON 3
DPTR FM NORMAL 6 LOWEST SLP 29.41 ON 11
[REMARKS]
#FINAL-04-21#