Climatological Report (Monthly)
Issued by NWS Glasgow, MT

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CLIMATE REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
226 AM MST MON JAN 1 2018

...................................

...THE GLASGOW CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1893 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              69   12/08/1939
                        12/03/1939
 LOW              -47   12/18/1929
                        12/19/1924
HIGHEST            56   12/09                         43  12/04
LOWEST            -32   12/31                        -29  12/17
AVG. MAXIMUM     26.5              26.0     0.5     21.2
AVG. MINIMUM      7.8               6.6     1.2      2.7
MEAN             17.1              16.3     0.8     12.0
DAYS MAX >= 90      0                                  0
DAYS MAX <= 32     15                                 22
DAYS MIN <= 32     31                                 31
DAYS MIN <= 0       9                                 14

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         1.49   1949
 MINIMUM            T   1932
TOTALS           0.72              0.40    0.32     0.36
DAILY AVG.       0.02              0.01    0.01     0.01
DAYS >= .01        11                                  8
DAYS >= .10         2                                  1
DAYS >= .50         0                                  0
DAYS >= 1.00        0                                  0
GREATEST
 24 HR. TOTAL    0.27   12/20 TO 12/20

SNOWFALL (INCHES)
RECORDS
 TOTAL           25.3   2008
 SNOW DEPTH        15   12/30/2003
                        12/31/1996
                        12/30/1996
TOTALS           13.1               8.0     5.1      9.2
 LIQUID EQUIV    1.31              0.80    0.51     0.92
SINCE 7/1        14.7              14.6     0.1      9.6
 LIQUID 7/1      1.47              1.50   -0.03     0.96
SNOWDEPTH AVG.      2                                  2
DAYS >= TRACE      14                                 14
DAYS >= 1.0         4                                  3
GREATEST
 SNOW DEPTH         6   12/31                          5  12/12
 24 HR TOTAL      6.5   12/20 TO 12/20

DEGREE_DAYS
HEATING TOTAL    1477              1509     -32     1637
 SINCE 7/1       3412              3502     -90     3256
COOLING TOTAL       0                 0       0        0
 SINCE 1/1        684               533     151      434
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              9.7
RESULTANT WIND SPEED/DIRECTION   5/311
HIGHEST WIND SPEED/DIRECTION    38/300    DATE  12/05
HIGHEST GUST SPEED/DIRECTION    52/300    DATE  12/05

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.50
NUMBER OF DAYS FAIR           16
NUMBER OF DAYS PC              6
NUMBER OF DAYS CLOUDY          9

AVERAGE RH (PERCENT)     72

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                3     FREEZING RAIN              0
LT FREEZING RAIN          1     HAIL                       0
HEAVY SNOW                0     SNOW                       2
LIGHT SNOW               14     SLEET                      0
FOG                      14     FOG W/VIS <= 1/4 MILE      2
HAZE                      3

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

&&

DECEMBER WAS SLIGHTLY ABOVE NORMAL OVERALL IN TEMPERATURES. THE
MONTH CAN BE DIVIDED FROM A MILD AUTUMN-LIKE CONDITIONS THROUGH THE
MIDDLE OF THE MONTH TO A DEFINITE WINTER FEEL AFTER THE 20TH. AFTER
THE 20TH, DAILY TEMPERATURES WERE BELOW NORMAL WITH MANY DAYS NOT
RECOVERING ABOVE ZERO. THE HIGH TEMPERATURE OF 56 ON THE 9TH BROKE A
RECORD, WHILE THE HIGH TEMPERATURES OF -13 ON THE 26TH AND -20 ON
THE 31ST BROKE THE RECORD FOR LOW MAX TEMPERATURES.

FOR PRECIPITATION, THE MONTH FINISHED ABOVE NORMAL, A WELCOMED
CHANGE. THE BIGGEST EVENT OCCURED ON THE 20TH, WHERE 6.5 INCHES FELL
BREAKING A RECORD FOR THE DAY. THIS SNOW MELTED DOWN TO 0.27 INCHES
OF LIQUID, WHICH ALSO BROKE THE RECORD FOR THE DAY.

IT WAS BREEZY FOR THE MONTH WITH DAILY PEAK WINDS MOSTLY AT OR ABOVE
20 MPH. THE PEAK WIND GUST FOR THE MONTH OCCURRED ON THE 5TH WITH 52
MPH.

LOOKING AHEAD TO THE MONTH OF JANUARY, NORMAL HIGH TEMPERATURES ARE
IN THE MIDDLE 20S WITH LOWS IN THE MIDDLE SINGLE DIGITS. NORMAL
PRECIPITATION FOR THE MONTH IS 0.37 WITH 8.0 INCHES OF SNOW.

$$



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