WFO Monthly/Daily Climate Data
Issued by NWS Sterling, VA

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086
CXUS51 KLWX 290620
CF6IAD
PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6)

                                          STATION:   WASHINGTON DULLES DC
                                          MONTH:     APRIL
                                          YEAR:      2017
                                          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  58  44  51   1  14   0 0.02  0.0    0 13.3 25 310   M    M   9 1      32 310
 2  64  36  50   0  15   0 0.00  0.0    0  5.5 17 320   M    M   4        24 340
 3  67  42  55   5  10   0 0.04  0.0    0 10.3 23 180   M    M   8        30 190
 4  79  56  68  17   0   3    T  0.0    0 12.7 26 280   M    M   6 1      33 290
 5  73  50  62  11   3   0 0.00  0.0    0  8.2 24 130   M    M   6        34 120
 6  62  48  55   4  10   0 1.57    T    0 10.3 37 260   M    M   9 135    57 220
 7  48  39  44  -8  21   0    T  0.0    0 19.0 33 300   M    M   8        46 310
 8  63  29  46  -6  19   0 0.00  0.0    0  8.6 25 290   M    M   1        34 290
 9  72  32  52   0  13   0 0.00  0.0    0  5.4 14 200   M    M   3        25 160
10  81  41  61   8   4   0 0.00  0.0    0  9.1 17 220   M    M   5        23 220
11  86  57  72  19   0   7 0.00  0.0    0  7.0 17 290   M    M   4        22 290
12  77  59  68  15   0   3 0.01  0.0    0  7.7 18 360   M    M   5        22 350
13  69  46  58   4   7   0 0.00  0.0    0  5.5 12  30   M    M   5 8      18  30
14  72  44  58   4   7   0 0.00  0.0    0  4.4 13 130   M    M   5        17 180
15  78  52  65  11   0   0    T  0.0    0  6.2 15 200   M    M   8        19 210
16  86  63  75  20   0  10    T  0.0    0  9.2 21 260   M    M   5 3      32 270
17  71  54  63   8   2   0 0.10  0.0    0  5.7 17 340   M    M   7 1      21 350
18  73  48  61   6   4   0 0.00  0.0    0  6.6 16 160   M    M   5        22 140
19  62  49  56   0   9   0 0.03  0.0    0  8.5 17 190   M    M   9        22 190
20  82  55  69  13   0   4 0.33  0.0    0  6.6 29 230   M    M   7 13     38 230
21  84  61  73  17   0   8    T  0.0    0  4.5 20 360   M    M   7 1      23 360
22  65  48  57   1   8   0 0.50  0.0    0  8.2 16 330   M    M   9 1      22 350
23  60  45  53  -4  12   0 0.00  0.0    0  5.6 12  20   M    M   9        16 360
24  57  51  54  -3  11   0 0.27  0.0    0  8.4 17  40   M    M  10 1      22  30
25  59  51  55  -2  10   0 0.17  0.0    0 10.0 22  30   M    M  10 1      25  40
26  73  56  65   7   0   0    T  0.0    0  6.4 15 350   M    M   7 1      21 360
27  82  54  68  10   0   3    T  0.0    0  7.3 22 210   M    M   7 12     32 210
28  84  57  71  13   0   6 0.00  0.0    0  5.6 14 220   M    M   3 1      21 200
================================================================================
SM 1987 1367       179  44  3.04    T    225.8          M      181
================================================================================
AV 71.0 48.8                               8.1 FASTST   M    M   6    MAX(MPH)
                                 MISC ---->  # 37 260               # 57  220
================================================================================
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:     2017
                                          LATITUDE:   38 57 N
                                          LONGITUDE:  77 27 W

[TEMPERATURE DATA]      [PRECIPITATION DATA]       SYMBOLS USED IN COLUMN 16

AVERAGE MONTHLY: 59.9   TOTAL FOR MONTH:   3.04    1 = FOG OR MIST
DPTR FM NORMAL:   5.8   DPTR FM NORMAL:   -0.20    2 = FOG REDUCING VISIBILITY
HIGHEST:    86 ON 16,11 GRTST 24HR  1.57 ON  6- 6      TO 1/4 MILE OR LESS
LOWEST:     29 ON  8                               3 = THUNDER
                        SNOW, ICE PELLETS, HAIL    4 = ICE PELLETS
                        TOTAL MONTH:    T          5 = HAIL
                        GRTST 24HR    T  ON  6- 6  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:   6
MIN 32 OR BELOW:   2    0.50 INCH OR MORE:   2
MIN  0 OR BELOW:   0    1.00 INCH OR MORE:   1

[HDD (BASE 65) ]
TOTAL THIS MO.   179    CLEAR  (SCALE 0-3)   2
DPTR FM NORMAL  -144    PTCLDY (SCALE 4-7)  17
TOTAL FM JUL 1  3712    CLOUDY (SCALE 8-10)  9
DPTR FM NORMAL  -848

[CDD (BASE 65) ]
TOTAL THIS MO.    44
DPTR FM NORMAL    28    [PRESSURE DATA]
TOTAL FM JAN 1    46    HIGHEST SLP M ON M
DPTR FM NORMAL    27    LOWEST  SLP 29.24 ON  6

[REMARKS]



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