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859
CXUS56 KTFX 011534
CF6HLN
PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6)

                                          STATION:   HELENA MT
                                          MONTH:     DECEMBER
                                          YEAR:      2020
                                          LATITUDE:   46 35 N
                                          LONGITUDE: 112  0 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  40  23  32   7  33   0 0.00  0.0    0 10.9 28 260   M    M   6        37 260
 2  37  15  26   1  39   0 0.00  0.0    0  1.5  8 250   M    M   0        10  80
 3  40  15  28   3  37   0 0.00  0.0    0  1.4  7 180   M    M   0         8 180
 4  43  15  29   5  36   0 0.00  0.0    0  1.9  9 320   M    M   0        10 330
 5  38  14  26   2  39   0 0.00  0.0    0  1.7  6 150   M    M   0         8 290
 6  40  13  27   3  38   0 0.00  0.0    0  1.7  7 300   M    M   0         9 250
 7  44  16  30   7  35   0 0.00  0.0    0  3.4 10 270   M    M   0        11 280
 8  55  26  41  18  24   0 0.00  0.0    0  3.4  8 260   M    M   1        10 280
 9  53  29  41  19  24   0 0.00  0.0    0  5.8 21 290   M    M   3        29 270
10  41  19  30   8  35   0 0.00  0.0    0  2.8  9 280   M    M   2        11 270
11  29  17  23   1  42   0 0.04  0.6    0  4.0  9 250   M    M   8 18     11 270
12  30  14  22   0  43   0    T    T    1  1.7  7 280   M    M   6 1       9 320
13  28  16  22   0  43   0 0.07  0.5    T  2.7  8 300   M    M   6 1       9 290
14  38  19  29   8  36   0 0.08  1.5    2  4.4 17 270   M    M   7 18     22 290
15  36  23  30   9  35   0    T    T    2  5.8 16 180   M    M   8        23 170
16  44  29  37  16  28   0 0.01  0.1    2  6.5 20 250   M    M   7        31 260
17  44  29  37  16  28   0 0.00  0.0    T  6.4 22 280   M    M   5        30 280
18  42  30  36  15  29   0 0.00  0.0    T  9.0 24 270   M    M   7        32 270
19  47  30  39  18  26   0 0.00  0.0    0 12.3 32 260   M    M   6        45 280
20  52  36  44  23  21   0 0.00  0.0    0 10.0 31 280   M    M   5        44 290
21  52  32  42  21  23   0    T  0.0    0  5.8 18 200   M    M   4        30 170
22  51  23  37  17  28   0    T    T    0 15.8 29 350   M    M   7        48 340
23  33  11  22   2  43   0 0.00  0.0    0  6.9 18 270   M    M   2        30 270
24  36  15  26   6  39   0 0.00  0.0    0  3.1  8 250   M    M   0        11 290
25  39  21  30  10  35   0 0.00  0.0    0  1.8  9 360   M    M   2        11 360
26  46  28  37  17  28   0 0.01    T    0  6.5 20 260   M    M   8        26 250
27  41  20  31  10  34   0 0.00  0.0    0  8.4 18 270   M    M   4        28 270
28  33  12  23   2  42   0 0.00  0.0    0  1.6  7 240   M    M   0         9 290
29  33   8  21   0  44   0 0.00  0.0    0  3.5 16 250   M    M   0        21 250
30  34  19  27   6  38   0 0.00  0.0    0  2.6 10 280   M    M   7        14 290
31  41  26  34  13  31   0 0.00  0.0    0  4.1 18 240   M    M   8        24 240
================================================================================
SM 1260  643      1056   0  0.21  2.7    157.4          M      119
================================================================================
AV 40.6 20.7                               5.1 FASTST   M    M   4    MAX(MPH)
                                 MISC ---->    32 260                 48 340
================================================================================
NOTES:
# LAST OF SEVERAL OCCURRENCES

COLUMN 17 PEAK WIND IN M.P.H.

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

                                          STATION:   HELENA MT
                                          MONTH:     DECEMBER
                                          YEAR:      2020
                                          LATITUDE:   46 35 N
                                          LONGITUDE: 112  0 W

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

AVERAGE MONTHLY: 30.7   TOTAL FOR MONTH:   0.21    1 = FOG OR MIST
DPTR FM NORMAL:   8.9   DPTR FM NORMAL:   -0.19    2 = FOG REDUCING VISIBILITY
HIGHEST:    55 ON  8    GRTST 24HR  0.15 ON 13-14      TO 1/4 MILE OR LESS
LOWEST:      8 ON 29                               3 = THUNDER
                        SNOW, ICE PELLETS, HAIL    4 = ICE PELLETS
                        TOTAL MONTH:   2.7 INCHES  5 = HAIL
                        GRTST 24HR   1.5 ON 14-14  6 = FREEZING RAIN OR DRIZZLE
                        GRTST DEPTH:   2 ON 16,15  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:   3    0.01 INCH OR MORE:   5
MAX 90 OR ABOVE:   0    0.10 INCH OR MORE:   0
MIN 32 OR BELOW:  30    0.50 INCH OR MORE:   0
MIN  0 OR BELOW:   0    1.00 INCH OR MORE:   0

[HDD (BASE 65) ]
TOTAL THIS MO.  1056    CLEAR  (SCALE 0-3)  14
DPTR FM NORMAL  -283    PTCLDY (SCALE 4-7)  17
TOTAL FM JUL 1  2773    CLOUDY (SCALE 8-10)  0
DPTR FM NORMAL  -444

[CDD (BASE 65) ]
TOTAL THIS MO.     0
DPTR FM NORMAL     0    [PRESSURE DATA]
TOTAL FM JAN 1   507    HIGHEST SLP 30.78 ON  2
DPTR FM NORMAL   101    LOWEST  SLP 29.41 ON 22

[REMARKS]
#FINAL-12-20#