Climatological Report (Monthly)
Issued by NWS

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CXUS55 KTFX 011659
CLMHLN


CLIMATE REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
931 AM MST SUN FEB 1 2015

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

...THE HELENA MT CLIMATE SUMMARY FOR THE MONTH OF JANUARY 2015...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1866 TO 2015

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              63   01/25/2015
                        01/07/1902
                        02/27/1932
 LOW              -42   01/25/1957
                        01/31/1893
HIGHEST            63R  01/25        33      30       55  01/11
LOWEST             -5   01/09         9     -14       -6  01/05
AVG. MAXIMUM     33.5              33.3     0.2     39.5
AVG. MINIMUM     15.4              13.0     2.4     18.6
MEAN             24.4              23.1     1.3     29.0
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32     15              11.8     3.2        7
DAYS MIN <= 32     28              29.0    -1.0       30
DAYS MIN <= 0       4               6.3    -2.3        2

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         3.75   1884
 MINIMUM            T   1987
TOTALS           0.64              0.36    0.28     0.55
DAYS >= .01         6               6.2    -0.2
DAYS >= .10         2               1.1     0.9
DAYS >= .50         0               0.0     0.0
DAYS >= 1.00        0               0.0     0.0
GREATEST
 24 HR. TOTAL    0.32   01/04 TO 01/05

SNOWFALL (INCHES)
RECORDS
 TOTAL             MM   5
 24 HR TOTAL       MM
TOTALS            7.4               6.2     1.2      6.8
SINCE 7/1        22.6              22.3     0.3
SNOWDEPTH AVG.      3
DAYS >= TRACE      10               5.6     4.4
DAYS >= 1.0         4               2.2     1.8
GREATEST
 SNOW DEPTH         6   01/16
                        01/15
                        01/14
 24 HR TOTAL      2.1   MM

DEGREE_DAYS
HEATING TOTAL    1248              1297     -49     1106
 SINCE 7/1       4158              4518    -360     4164
COOLING TOTAL       0                 0       0        0
 SINCE 1/1          0                 0       0        0
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              5.0
HIGHEST WIND SPEED/DIRECTION    35/250    DATE  01/18
HIGHEST GUST SPEED/DIRECTION    45/260    DATE  01/18

SKY COVER
AVERAGE SKY COVER           0.40

AVERAGE RH (PERCENT)     72

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                2     FREEZING RAIN              0
LT FREEZING RAIN          2     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW               10     SLEET                      0
FOG                       9     FOG W/VIS <= 1/4 MILE      3
HAZE                     11

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

&&

SUMMARY...HELENA WAS 1.3 DEGREES WARMER THAN AVERAGE AND
RECEIVED ALMOST  DOUBLE ITS MONTHLY AVERAGE PRECIPITATION DURING
JANUARY. THESE AVERAGES OBSCURE LARGE DEPARTURES FROM NORMAL THAT
OCCURRED THROUGHOUT THE MONTH. A LARGE SCALE RIDGE OVER THE PACIFIC
NORTHWEST ESTABLISHED A NORTHWEST FLOW OVER MONTANA THROUGH THE
FIRST THIRD OF THE MONTH. THIS PATTERN MAINTAINED COLD AND SNOWY
CONDITIONS THROUGH THE PERIOD. SNOW DEPTH IN HELENA REACHED UP
TO 6 INCHES. THE RIDGE BROKE DOWN THROUGH THE MIDDLE OF JANUARY
WITH LITTLE PRECIPITATION AND SLIGHTLY WARMER THAN AVERAGE
TEMPERATURES. THE UPPER LEVEL RIDGE STRENGTHENED AGAIN OVER THE
INTERIOR WEST...PUSHING TEMPERATURES WELL ABOVE AVERAGE. THE HIGH
TEMPERATURE OF 63 DEGREES ON THE 25TH SET A NEW DAILY RECORD AND
TIED THE MONTHLY RECORD HIGH TEMPERATURE.

$$




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