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

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CXUS51 KLWX 300620
CF6IAD
PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6)

                                          STATION:   WASHINGTON DULLES DC
                                          MONTH:     MAY
                                          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  81  70  76  17   0  11 0.24  0.0    0 14.5 26 190   M    M   7 13     33 190
 2  76  53  65   6   0   0 0.00  0.0    0  9.4 25 290   M    M   5        34 290
 3  63  44  54  -6  11   0 0.00  0.0    0 10.7 26 310   M    M   4        36 310
 4  65  41  53  -7  12   0 0.21  0.0    0  9.2 21 110   M    M   8 1      27 110
 5  75  56  66   6   0   1 1.09  0.0    0 12.0 22 110   M    M   8 13     29 110
 6  63  45  54  -6  11   0 0.13  0.0    0  8.8 20 300   M    M   7 1      25 300
 7  62  43  53  -8  12   0    T  0.0    0 10.4 22 300   M    M   7        32 320
 8  64  39  52  -9  13   0 0.00  0.0    0  7.9 22 300   M    M   4        27 300
 9  66  36  51 -10  14   0 0.00  0.0    0  3.3 10 340   M    M   3 8      13 330
10  75  40  58  -3   7   0 0.00  0.0    0  3.6 12  80   M    M   6        14  60
11  59  50  55  -7  10   0 1.73  0.0    0  6.0 14  70   M    M  10 13     18 110
12  56  48  52 -10  13   0 0.38  0.0    0  5.7 12 100   M    M  10 1      15 120
13  60  44  52 -10  13   0 0.41  0.0    0  7.8 17 350   M    M   8 1      21 340
14  80  42  61  -1   4   0 0.00  0.0    0  9.8 30 290   M    M   5 1      39 310
15  75  47  61  -2   4   0 0.00  0.0    0 11.5 24 310   M    M   2 8      33 320
16  81  44  63   0   2   0 0.00  0.0    0  3.1 10 180   M    M   2        14 190
17  92  57  75  12   0  10 0.00  0.0    0  6.7 17 210   M    M   4        22 190
18  90  67  79  15   0  14 0.61  0.0    0  8.4 21 200   M    M   7 13     27 300
19  90  66  78  14   0  13 0.05  0.0    0  5.6 15 210   M    M   6 13     19 210
20  71  60  66   2   0   1 0.00  0.0    0  7.9 15  50   M    M   9        19  40
21  67  57  62  -2   3   0    T  0.0    0  6.8 15 100   M    M  10        19 100
22  73  57  65   0   0   0 0.51  0.0    0  2.9 12 350   M    M   9 1      15 350
23  65  55  60  -5   5   0 0.12  0.0    0  5.5 14 100   M    M   9 1      17  90
24  65  57  61  -4   4   0 0.34  0.0    0  7.9 18 110   M    M  10 1      25 120
25  73  55  64  -2   1   0 0.79  0.0    0  6.4 18 290   M    M   9 13     24 100
26  76  53  65  -1   0   0 0.00  0.0    0  9.3 32 290   M    M   6 1      40 280
27  72  55  64  -2   1   0 0.01  0.0    0  2.7  9  30   M    M   8        12 360
28  74  57  66  -1   0   1 0.17  0.0    0  4.0 14 110   M    M   7 1      17 120
29  82  63  73   6   0   8    T  0.0    0  5.9 18 290   M    M   9 123    24 300
================================================================================
SM 2091 1501       140  59  6.79     0.0 213.7          M      199
================================================================================
AV 72.1 51.8                               7.4 FASTST   M    M   7    MAX(MPH)
                                 MISC ---->  # 32 290               # 40  280
================================================================================
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:    MAY
                                          YEAR:     2017
                                          LATITUDE:   38 57 N
                                          LONGITUDE:  77 27 W

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

AVERAGE MONTHLY: 61.9   TOTAL FOR MONTH:   6.79    1 = FOG OR MIST
DPTR FM NORMAL:  -0.9   DPTR FM NORMAL:    2.54    2 = FOG REDUCING VISIBILITY
HIGHEST:    92 ON 17    GRTST 24HR  1.73 ON 11-11      TO 1/4 MILE OR LESS
LOWEST:     36 ON  9                               3 = THUNDER
                        SNOW, ICE PELLETS, HAIL    4 = ICE PELLETS
                        TOTAL MONTH:   0.0 INCH    5 = HAIL
                        GRTST 24HR     0.0         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:  15
MAX 90 OR ABOVE:   3    0.10 INCH OR MORE:  13
MIN 32 OR BELOW:   0    0.50 INCH OR MORE:   5
MIN  0 OR BELOW:   0    1.00 INCH OR MORE:   2

[HDD (BASE 65) ]
TOTAL THIS MO.   140    CLEAR  (SCALE 0-3)   3
DPTR FM NORMAL    13    PTCLDY (SCALE 4-7)  16
TOTAL FM JUL 1  3852    CLOUDY (SCALE 8-10) 10
DPTR FM NORMAL  -847

[CDD (BASE 65) ]
TOTAL THIS MO.    59
DPTR FM NORMAL    -5    [PRESSURE DATA]
TOTAL FM JAN 1   128    HIGHEST SLP M ON M
DPTR FM NORMAL    44    LOWEST  SLP 29.33 ON  6

[REMARKS]


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