WFO Monthly/Daily Climate Data
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CXUS55 KBOU 010900
CF6BDU
PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6)

                                          STATION:   BOULDER AIRPORT
                                          MONTH:     APRIL
                                          YEAR:      2021
                                          LATITUDE:   40  2 N
                                          LONGITUDE: 105 14 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  70  28  49   M  16   0 0.00    M    M  4.1  9 230   M    M   0         M   M
 2  73  39  56   M   9   0 0.00    M    M  3.8  8 220   M    M   0        18 160
 3  79  39  59   M   6   0 0.00    M    M  3.9  9 110   M    M   0        17 120
 4  79  50  65   M   0   0 0.00    M    M  6.3 15 290   M    M   0        24 290
 5  79  48  64   M   1   0 0.00    M    M  6.2 16 360   M    M   0        29 360
 6  54  36  45   M  20   0 0.10    M    M  5.4 13 350   M    M   4        22 330
 7  63  32  48   M  17   0 0.00    M    M  5.9 24 270   M    M   4        35 270
 8  70  39  55   M  10   0 0.00    M    M  9.8 21 250   M    M   1        33 260
 9  55  36  46   M  19   0 0.00    M    M  6.4 18 250   M    M   2        31 250
10  68  30  49   M  16   0 0.00    M    M  5.5 22 280   M    M   0        31 280
11  55  34  45   M  20   0 0.00    M    M  6.0 10  50   M    M   4        25   0
12  41  30  36   M  29   0 0.00    M    M  3.0  8 350   M    M   8         M   M
13  39  28  34   M  31   0 0.01    M    M  4.7 10 270   M    M  10        18   0
14  41  28  35   M  30   0 0.00    M    M  4.2 13 350   M    M  10        16 350
15  37  30  34   M  31   0 0.19    M    M  5.9 12 360   M    M  10 1      17 360
16  36  28  32   M  33   0 0.04    M    M  1.6  7 360   M    M   9         M   M
17  45  30  38   M  27   0 0.00    M    M  2.8  8 240   M    M   2        16 240
18  57  34  46   M  19   0 0.00    M    M  6.0 15 270   M    M   0        25   0
19  48  21  35   M  30   0 0.37    M    M  6.0 20  20   M    M   8 1      31  20
20  34  16  25   M  40   0 0.00    M    M  2.7  7  50   M    M   2         M   M
21  32  28  30   M  35   0 0.00    M    M  2.5  7  30   M    M   8         M   M
22  50  32  41   M  24   0 0.00    M    M  3.9 14 250   M    M   3 1      24 250
23  55  37  46   M  19   0 0.00    M    M  5.7 22 290   M    M   1        32 290
24  63  34  49   M  16   0 0.00    M    M  2.4  8 310   M    M   3         M   M
25  81  43  62   M   3   0 0.00    M    M  4.3  9 240   M    M   0        17 110
26  77  50  64   M   1   0 0.00    M    M  8.2 16 300   M    M   0        38 170
27  59  37  48   M  17   0 0.58    M    M  6.8 20 360   M    M   5 3      26   0
28  61  37  49   M  16   0 0.21    M    M  2.1  7 240   M    M   6         M   M
29  70  43  57   M   8   0 0.00    M    M  4.3  8 240   M    M   0         M   M
30  79  46  63   M   2   0 0.00    M    M  3.8  8 240   M    M   0         M   M
================================================================================
SM 1750 1043       545   0  1.50    M    144.2          M      100
================================================================================
AV 58.3 34.8                               4.8 FASTST   M    M   3    MAX(MPH)
                                 MISC ---->    24 270                 38 170
================================================================================
NOTES:
# LAST OF SEVERAL OCCURRENCES

COLUMN 17 PEAK WIND IN M.P.H.

PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6) , PAGE 2

                                          STATION:   BOULDER AIRPORT
                                          MONTH:     APRIL
                                          YEAR:      2021
                                          LATITUDE:   40  2 N
                                          LONGITUDE: 105 14 W

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

AVERAGE MONTHLY: 46.6   TOTAL FOR MONTH:   1.50    1 = FOG OR MIST
DPTR FM NORMAL:   0.0   DPTR FM NORMAL:       M    2 = FOG REDUCING VISIBILITY
HIGHEST:    81 ON 25    GRTST 24HR  0.58 ON 27-27      TO 1/4 MILE OR LESS
LOWEST:     16 ON 20                               3 = THUNDER
                        SNOW, ICE PELLETS, HAIL    4 = ICE PELLETS
                        TOTAL MONTH:  M            5 = HAIL
                        GRTST 24HR    M  ON   M    6 = FREEZING RAIN OR DRIZZLE
                        GRTST DEPTH:  M  ON   M    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:   1    0.01 INCH OR MORE:   7
MAX 90 OR ABOVE:   0    0.10 INCH OR MORE:   5
MIN 32 OR BELOW:  13    0.50 INCH OR MORE:   1
MIN  0 OR BELOW:   0    1.00 INCH OR MORE:   0

[HDD (BASE 65) ]
TOTAL THIS MO.   545    CLEAR  (SCALE 0-3)  18
DPTR FM NORMAL     M    PTCLDY (SCALE 4-7)   8
TOTAL FM JUL 1  5346    CLOUDY (SCALE 8-10)  4
DPTR FM NORMAL     M

[CDD (BASE 65) ]
TOTAL THIS MO.     0
DPTR FM NORMAL     M    [PRESSURE DATA]
TOTAL FM JAN 1     0    HIGHEST SLP M ON M
DPTR FM NORMAL     M    LOWEST  SLP M ON M

[REMARKS]
#FINAL-04-21#


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