Public Information Statement
Issued by NWS Great Falls, MT

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PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS MT
1224 PM MST THU FEB 22 2018

...SNOWFALL AND TEMPERATURE INFORMATION FOR THIS WINTER...

DATA THROUGH FEBRUARY 21, 2018

WITH RECORD AMOUNTS OF SNOW BEING MEASURED ACROSS THE AREA, THIS
SUMMARY GIVES SOME INFORMATION ABOUT THE WINTER SNOWFALL, IN
ADDITION TO SOME TEMPERATURE AND WIND CHILL INFORMATION. AT SOME
LOCATIONS, THIS FEBRUARY RANKS AMONG THE FIVE COLDEST OF RECORD.

THIS SUMMARY SHOWS THE SNOWFALL AND NORMAL FOR THIS POINT IN
FEBRUARY, ALONG WITH THE RECORD AMOUNT RECORDED TO THE DATE. IT ALSO
SHOWS THE SNOW AMOUNT SO FAR IN THE SEASON, ALONG WITH THE NORMAL
AND RECORD AMOUNTS FOR THE SEASON-TO-DATE. IF THE RANKINGS ARE
WITHIN THE TOP 15, THEY ARE INCLUDED.

                               SNOW (INCHES)
                 SO FAR THIS MONTH    | SO FAR THIS SEASON   CURRENT
                                 FEB  |                        YEAR
LOCATION     FEB  NORM   RECORD  RANK | SNOW  NORM  RECORD     RANK
BOZEMAN APT   7.9  3.4  15.2 1959     | 50.5  20.8  69.2 1947-8  4
BOZEMAN MSU  13.3  7.9  27.0 1986     |107.0  53.5 105.1 1996-7  1
CHINOOK      21.0  4.6  12.9 1914  1  | 48.0  23.5  53.4 1970-1  4
CHOTEAU      34.3  4.0  17.0 1996  1  | 68.3  22.2  55.7 1977-8  1
CUT BANK     26.2  2.9  10.4 1915  1  | 58.2  20.3  62.1 1946-7  2
DILLON        3.4  4.1  17.5 1907     | 24.9  21.9  84.4 1919-20
EAST GLACIER 70.5 20.8  63.0 2017  1  |234.5 131.6 240.0 1971-2  2
GREAT FALLS  32.6  5.8  27.7 2011  1  | 72.3  37.6  78.6 2010-1  2
HAVRE        31.8  4.2  18.6 1978  1  | 78.3  26.3  66.7 1977-8  1
HELENA       12.5  3.7  24.9 1936 14  | 47.9  26.0  91.4 1880-1
LEWISTOWN   E20.0  3.7  29.5 2007  6  | 43.0  36.8  99.4 1929-30
W YELLOWSTON 17.1 19.8  54.7 1986     |103.1 115.1 241.1 1994-5


FOR COMPARISON, THE FOLLOWING TABLE SHOWS THE MOST SNOW (INCHES)
MEASURED IN A FEBRUARY AND A SEASON AT THE LOCATIONS INCLUDED.

                                                 RECORDS
LOCATION      MAX FEB SNOW   MAX SEASONAL YEAR   BEGAN
                        2018   SNOW
                        RANK
BOZEMAN APT   15.2 1959          97.8  1947-48   1937
BOZEMAN MSU   28.1 2003         158.5  1996-97   1892
CHINOOK       17.5 1994  1       66.0  2010-11   1895
CHOTEAU       20.3 2011  1       90.0  1966-67   1893
CUT BANK      15.6 1958  1       76.2  1946-47   1903
DILLON        22.1 1904         120.2  1919-20   1895
EAST GLACIER  72.5 2017  2      319.0  1971-72   1949
GREAT FALLS   32.6 2011  1      117.5  1988-89   1891
HAVRE         18.6 1978  1       93.3  1981-82   1880
HELENA        31.1 1936         112.8  1880-81   1880
LEWISTOWN     29.5 2007  6      135.0  1927-28   1896
W YELLOWSTONE 62.0 1986         316.6  1994-95   1906

CHOTEAU`S ALL-TIME MONTHLY MAXIMUM SNOWFALL WAS 36-INCHES IN MARCH
1898. THIS FEBRUARY (34.3) IS THE SECOND HIGHEST FOR ANY MONTH.
CUT BANK`S ALL-TIME MAXIMUM MONTHLY SNOWFALL WAS 30-INCHES IN
DECEMBER 1924. THIS FEBRUARY (26.2) IS THE THIRD HIGHEST FOR ANY
MONTH.
EAST GLACIER`S ALL-TIME MAXIMUM MONTHLY SNOWFALL IS 106.0-INCHES IN
JANUARY 1972.
GREAT FALLS ALL-TIME MAXIMUM MONTHLY SNOWFALL WAS 35.4-INCHES IN
APRIL 2009 AND 1967. THIS FEBRUARY (32.6) RANKS THIRD HIGHEST FOR
ANY MONTH.
HAVRE`S ALL-TIME HIGHEST MONTHLY SNOWFALL WAS 41.4-INCHES IN JANUARY
1971. THIS FEBRUARY (31.8) IS THE 5TH HIGHEST FOR ANY MONTH.



AVERAGE SNOWDEPTH FOR FEBRUARY, AND THE WINTER...DECEMBER
THROUGH FEB 21 (INCHES)
            FEB   FEB  YEAR    WINTER NORM CURRENT  HIGHEST AVG
            2018  MAX                        RANK
                                                       & YEAR

BOZEMAN MSU 12.0  24.3 1942     12.3  6.5    7TH   15.5 2000-01
CUT BANK     4.3  13.3 1978
GREAT FALLS  5.2  13.1 1978      2.7  1.3   28TH    9.4 1922-23
HAVRE       18.3  20.9 1978      8.1  2.5    8TH   12.5 1915-16
HELENA       2.9                 3.9  1.8   22ND    7.7 1996-97
LEWISTOWN   14.2  27.1 1978


###############################################
PRECIPITATION...

                              PRECIP (INCHES)
               SO FAR THIS MONTH | SO FAR THIS WATER    CURRENT
                            FEB  |    YEAR                YEAR
LOCATION     FEB  RECORD    RANK | PREC  NORM  RECORD     RANK
CUT BANK    E1.87 1.10 1904   1  | 4.08  1.41  5.84 1947    3
GREAT FALLS  1.43 2.16 1958  10  | 4.64  2.98  6.53 1907   19
HAVRE        1.66 1.47 1888   1  | 5.66  2.02  5.56 1884    1
HELENA       1.09 1.98 2014  12  | 4.76  2.23 10.21 1881   16
LEWISTOWN    1.47 2.22 1914   6  | 3.99  3.51  8.87 1898


AT THIS POINT IN THE MONTH, HAVRE HAS RECORDED 1.66-INCHES OF
MOISTURE. THIS IS THEIR WETTEST FEBRUARY OF RECORD, AND THE
SIXTH WETTEST WINTER (DEC-FEB) PERIOD. IT IS THE WETTEST WINTER
SINCE 1977-78.

###############################################
TEMPERATURE...

TEMPERATURES HAVE ALSO BEEN ON THE COOLER SIDE THIS MONTH. THROUGH
FEB 21, HAVRE IS RUNNING THEIR 4TH COLDEST OF RECORD, WHILE GREAT
FALLS AND LEWISTOWN ARE AVERAGING 5TH COLDEST OF RECORD.


                               TEMPERATURE (F)
                 SO FAR THIS MONTH     | COLDEST FEBRUARY
                   DEP            FEB  |
LOCATION      FEB  NORM    RECORD RANK | TEMP  YEAR
BOZEMAN APT  15.7 -10.6   0.7 1989  13 |  6.1  1989
CUT BANK      5.8 -17.9 -18.0 1936   8 |-11.4  1936
DILLON       17.2  -8.2   5.4 1989   7 | 10.8  1989
GREAT FALLS  10.0 -16.8 -13.5 1936   5 | -5.2  1936
HAVRE        -1.5 -22.9 -19.0 1936   4 |-12.8  1936
HELENA       14.3 -12.6  -8.1 1936  20 |  1.9  1936
LEWISTOWN     9.1 -16.0  -9.1 1936   5 | -0.2  1936
W YELLOWSTON 15.4  +0.2   0.7 1933     |  4.6  1933


LOWEST AREA TEMPERATURE FEBRUARY 2018:
31 MILES NORTH OF HAVRE ON THE INTL BORDER: -46F ON THE 12TH

THIS IS THE FIRST WINTER SINCE 1984-85 IN WHICH LOW TEMPERATURES OF
COLDER THAN -40F WERE RECORDED IN ALL THREE WINTER MONTHS OF
DECEMBER, JANUARY AND FEBRUARY.

LOWEST AREA WIND CHILL FEBRUARY 2018:
29 MILES NORTH OF HINGHAM ON THE MILK RIVER: -68F WITH A
TEMPERATURE OF -39F AND EAST WIND OF 13 MPH ON THE 10TH.

$$



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