Climatological Report (Annual)
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000
CXUS55 KTFX 031954
CLAGTF
MTZ008>015-044>055-151800-

AREA ANNUAL CLIMATE SUMMARY
NATIONAL WEATHER SERVICE GREAT FALLS MT
1255 PM MST SUN JAN 3 2016

THIS DATA IS PRELIMINARY UNTIL CERTIFIED BY NATIONAL CENTERS FOR
ENVIRONMENTAL DATA.

...2016 WEATHER SUMMARY FOR NORTH CENTRAL AND SOUTHWEST MONTANA...

AVERAGE TEMPERATURE / NORMAL/ DEPARTURE FROM NORMAL
 GREAT FALLS....46.9 / 44.6... +2.3...18TH WARMEST YEAR OF RECORD.
 HAVRE..........45.4 / 43.5... +1.9...15TH WARMEST YEAR OF RECORD.
 HELENA.........48.2 / 45.3... +2.9... 2ND WARMEST YEAR OF RECORD.
 BOZEMAN........45.0 / 42.8... +2.2... 2ND WARMEST YEAR OF RECORD.
 CUT BANK.......44.1 / 42.1... +2.0... 6TH WARMEST YEAR OF RECORD.
 DILLON.........46.0 / 42.8... +2.2... 1ST WARMEST YEAR OF RECORD.
 LEWISTOWN......46.5 / 43.1... +2.4... 3RD WARMEST YEAR OF RECORD.
 W YELLOWSTONE..36.3 / 34.4... +1.9...15TH WARMEST YEAR OF RECORD.

HIGHEST / LOWEST TEMPERATURES
 GREAT FALLS....100 ON 08/14          /  -18 ON 01/09
 HAVRE..........103 ON 06/28          /  -22 ON 01/09
 HELENA.........103 ON 06/27          /  - 6 ON 11/26-27
 BOZEMAN........ 99 ON 06/29          /  -13 ON 12/26
 CUT BANK....... 97 ON 08/13          /  -19 ON 01/09
 DILLON......... 98 ON 06/28          /  - 8 ON 11/28
 LEWISTOWN...... 98 ON 08/14          /  -13 ON 01/09
 W YELLOWSTONE.. 91 ON 06/29          /  -32 ON 01/01

     PRECIPITATION / NORMAL / DEPARTURE FROM NORMAL / MOST IN 24 HRS
 GREAT FALLS....15.69 / 14.75 /    +0.94 /        2.33 ON 10/03-04
 HAVRE..........12.17 / 11.20 /    +0.97 /        2.07 ON 07/27-28
 HELENA......... 9.90 / 11.22 /    -1.32 /        1.06 ON 05/15-16
 BOZEMAN........12.97 / 14.10 /    -1.13 /        0.73 ON 05/15-16
 CUT BANK.......10.05 / 10.85 /    -0.80 /        1.17 ON 09/05
 DILLON.........10.04 / 10.50 /    -0.46 /        1.08 ON 05/15-16
 LEWISTOWN......14.27 / 16.85 /    -2.58 /        1.23 ON 05/16-17
 W YELLOWSTONE..20.78 / 21.09 /    -0.31 /        0.90 ON 05/16


SNOWFALL / DEPARTURE FROM NORMAL / MOST IN 24 HRS / MAX SNOW ON GRD
 GREAT FALLS.. 55.4 / -7.4 /  8.2 ON 12/14   / 12 INCHES ON 01/06&09
 HAVRE.........24.5 /-13.9 /  4.0 ON 01/05-06/  9 INCHES ON 01/11-13
 HELENA........20.2 /-19.9 /  5.0 ON 12/13-14/  6 INCHES ON 01/12-16
 BOZEMAN.......29.0 /-11.2 /  5.0 ON 04/14-15/ 10 INCHES ON 01/03-05
 CUT BANK......43.6 / +6.7 /  5.0 ON 11/10   /  7 INCHES ON 01/07
 DILLON........25.3 /-16.1    6.0 ON 12/14   /  8 INCHES ON 12/27-29
 LEWISTOWN.....              11.0 ON 01/05-06/ 19 INCHES ON 01/07-08
 BOZEMAN MSU.. 64.7 /-26.3 /  9.6 ON 12/14   / 12 INCHES ON 01/03
                                                            12/25-26
 W YELLOWSTON. 98.2 /-62.4 / 10.0 ON 12/18   / 34 INCHES ON 12/19-21


AVERAGE WIND / DEPARTURE FROM NORMAL / PEAK WIND /MPH/
 GREAT FALLS....10.9 MPH / -1.5 / 61 MPH ON 11/17... 3RD CALMEST YR
 HAVRE..........10.1 MPH / +0.2 / 72 MPH ON 07/04...23RD WINDIEST YR
 HELENA......... 6.3 MPH / +0.1 / 68 MPH ON 12/09...18TH CALMEST YR
 BOZEMAN........ 5.4 MPH / +0.5 / 56 MPH ON 11/18...22ND WINDIEST YR
 CUT BANK.......12.1 MPH / -0.2 / 76 MPH ON 11/17...17TH CALMEST YR
 DILLON......... 8.9 MPH / +0.5 / 65 MPH ON 06/29...23RD WINDIEST YR
 LEWISTOWN...... 8.8 MPH /  0.5 / 74 MPH ON 11/18...29TH CALMEST YR

LAST SPRING FROST / FIRST FALL FROST               FREEZE FREE
                       AVERAGE            AVERAGE   DAYS   NORMAL
 GREAT FALLS....05/18   05/20   /  09/28   09/21    132     123
 HAVRE..........05/19   05/15   /  09/28   09/21    131     128
 HELENA.........05/10   05/15   /  10/05   09/24    147     130
 BOZEMAN........05/11   06/02   /  08/23   09/11    103     101
 CUT BANK.......05/20   05/24   /  08/23   09/11     94     109
 DILLON.........05/11   06/02   /  09/06   09/13    117     102
 LEWISTOWN......05/20   05/26   /  10/05   09/17    137     113
 W YELLOWSTONE..06/23   06/24   /  07/19   07/22     19      15

DAYS OF MAXIMUM TEMPERATURE 90F OR HIGHER / 32F OR LOWER
                    AVERAGE        AVERAGE
 GREAT FALLS.... 29    18    /  38   40
 HAVRE.......... 25    24    /  50   54
 HELENA......... 31    24    /  46   41
 BOZEMAN........ 23    22    /  46   35
 CUT BANK....... 17     8    /  47   48
 DILLON......... 20     8    /  40   45
 LEWISTOWN...... 21    11    /  35   44

DAYS WITH MINIMUM TEMPERATURE 32F OR LOWER / 0F OR LOWER
                     AVERAGE       AVERAGE
 GREAT FALLS.... 159   166   /  18   21
 HAVRE.......... 180   180   /  28   31
 HELENA......... 140   167   /  14   18
 BOZEMAN........ 183   178   /  18   22
 CUT BANK....... 176   183   /  21   27
 DILLON......... 163   191   /  12   14
 LEWISTOWN...... 157   181   /  16   21

DAYS WITH PRECIPITATION
                                                      ANY
                =>0.01 NRM  =>0.10 NRM   =>0.50 NRM  SNOW  NRM
 GREAT FALLS....  87    99    40   40        6   4    58   69
 HAVRE..........  89    84    34   33        6   4    48   55
 HELENA.........  82    88    30   33        5   4    56   62
 BOZEMAN........ 107   102    41   44        6   4    62   66
 CUT BANK.......  68    77    19   26        5   4
 DILLON.........  89    80    29   29        4   4
 LEWISTOWN...... 119   113    54   47        2   4


MILESTONES REACHED DURING 2015...INCLUDING SOME TEMPERATURE AND PRECIPITATION
HIGHLIGHTS AND RANKING...

AS A COMPOSITE FOR SOUTHWESTERN AND NORTH CENTRAL MONTANA, THIS WAS
THE 6TH WARMEST YEAR OF RECORD. IT WAS THE WARMEST SINCE 2007.
PRECIPITATION WAS THE 49TH DRIEST OF RECORD, AND THE DRIEST SINCE
2012. WINDS WERE THE 14TH CALMEST OF RECORD, AND THE LIGHTEST SINCE
2013. SNOWFALL TOTALS WERE THE 20TH SMALLEST OF RECORD. THIS WAS THE
LIGHTEST AVERAGE SNOWFALL FOR THE CALENDAR YEAR SINCE 1987.

BOZEMAN...
 FEB...PRECIPITATION OF 0.15 INCHES WAS THE FIFTH LOWEST OF RECORD.
 MAR...AVERAGE TEMPERATURE OF 40.4 DEGREES WAS THE THIRD WARMEST OF
       RECORD, AND THE WARMEST SINCE 2007. AVERAGE IS 34.1.
 APR...AVERAGE WIND SPEED OF 5.0 MPH WAS THE LOWEST OF RECORD.
       THIS SET A NEW RECORD LAST SET IN 1989 WITH AN AVERAGE OF 5.9
       MPH.
 MAY...AVERAGE WIND SPEED OF 5.9 MPH IS THE THIRD LOWEST OF RECORD.
 JUN...AVERAGE WIND SPEED OF 5.5 MPH IS THE THIRD LOWEST OF RECORD.
       PRECIPITATION OF 0.60 INCHES WAS THE THIRD LOWEST OF RECORD,
       AND THE DRIEST SINCE 1974. AVERAGE IS 2.46 INCHES.
       AVERAGE TEMPERATURE OF 64.7 DEGREES WAS THE SECOND WARMEST OF
       RECORD, AND THE WARMEST SINCE 1988. AVERAGE IS 59.1.
 OCT...AVERAGE WIND SPEED OF 16.6 MPH ON THE 11TH WAS THE 6TH WINDIEST
       OCTOBER DAY OF RECORD.
       AVERAGE TEMPERATURE OF 48.5F IS THE 3RD WARMEST OF RECORD,
       AND THE WARMEST SINCE 1988. AVERAGE IS 43.4F.
 SPRING (MAR-MAY)...AVERAGE WIND SPEED OF 5.7 MPH IS THE CALMEST OF
       RECORD. THIS SET A NEW RECORD WHICH WAS LAST SET IN 1989
       WITH AN AVERAGE SPEED OF 5.8 MPH.
 2015 WAS THE 2ND WARMEST YEAR...THE WARMEST SINCE 2007. THIS WAS
ALSO THE 31ST DRIEST YEAR OF RECORD. ANNUAL SNOWFALL WAS THE 8TH
LOWEST OF RECORD.
THIS WAS THE 5TH CALMEST YEAR OF RECORD AT BOZEMAN.

CUT BANK...
 MAR...AVERAGE TEMPERATURE OF 39.8 DEGREES WAS THE SECOND WARMEST OF
       RECORD, AND THE WARMEST SINCE 1986. AVERAGE IS 31.5.
 MAY...AVERAGE WIND SPEED OF 9.5 MPH IS THE SECOND CALMEST OF
       RECORD.
 JUN...AVERAGE TEMPERATURE OF 62.5 DEGREES WAS THE FIFTH WARMEST OF
       RECORD, AND THE WARMEST SINCE 1992. AVERAGE IS 57.8.
 SEP...AVERAGE WIND SPEED OF 28.3 MPH ON THE 20TH WAS THE WINDIEST
       SEPTEMBER DAY SINCE 1984.
 OCT...AVERAGE WIND SPEED OF 32.2 MPH ON THE 11TH WAS THE WINDIEST
       OCTOBER DAY SINCE 1997.
 NOV...PRECIPITATION OF 1.06 INCHES WAS THE 6TH HIGHEST OF RECORD,
       AND THE HIGHEST SINCE 2014. AVERAGE IS 0.36 INCHES.
 FALL (SEP-NOV)...PRECIPITATION OF 3.91 INCHES WAS THE 6TH HIGHEST OF
       RECORD, AND THE HIGHEST SINCE 2007. AVERAGE IS 2.02 INCHES.
 THIS WAS THE WARMEST YEAR SINCE 2007, AND THE 40TH DRIEST OF
RECORD. SNOWFALL WAS THE 26TH HIGHEST OF RECORD.

DILLON...
 JAN...PRECIPITATION OF A TRACE TIED FOR THE DRIEST OF RECORD.
       AVERAGE TEMPERATURE OF 30.2 DEGREES WAS THE SECOND WARMEST OF
       RECORD, AND THE WARMEST SINCE 1953. AVERAGE IS 22.7.
 FEB...AVERAGE TEMPERATURE OF 33.5F WAS THE FIFTH WARMEST OF RECORD,
       AND THE WARMEST SINCE 1992. AVERAGE IS 26.2.
 MAR...AVERAGE TEMPERATURE OF 41.5 DEGREES WAS THE SECOND WARMEST OF
       RECORD, AND THE WARMEST SINCE 1992. AVERAGE IS 34.3.
 APR...AVERAGE WIND SPEED OF 8.4 MPH IS THE FOURTH CALMEST OF
       RECORD.
 JUN...AVERAGE WIND SPEED OF 7.1 MPH IS THE SECOND CALMEST OF
       RECORD.
       AVERAGE TEMPERATURE OF 64.6 DEGREES WAS THE SECOND WARMEST OF
       RECORD, AND THE WARMEST SINCE 1961. AVERAGE IS 58.1.
 OCT...AVERAGE TEMPERATURE OF 50.5F WAS THE 2ND WARMEST OF RECORD.
       THIS IS THE WARMEST SINCE 1988.
 NOV...PRECIPITATION OF 1.04 INCHES WAS THE 3RD HIGHEST OF RECORD,
       AND THE HIGHEST SINCE 1973. AVERAGE IS 0.39 INCHES.

 WINTER (DEC14-FEB)...AVERAGE TEMPERATURE OF 30.0F WAS THE SECOND
       WARMEST OF RECORD, AND THE WARMEST SINCE 1980-81. AVERAGE IS
       23.2F.
 SPRING (MAR-MAY)...AVERAGE TEMPERATURE OF 45.2 DEGREES WAS THE
       THIRD WARMEST OF RECORD, AND THE WARMEST SINCE 1992. AVERAGE
       IS 42.1.
 SUMMER (JUN-AUG)...AVERAGE TEMPERATURE OF 65.3 DEGREES WAS THE 7TH
       WARMEST OF RECORD, AND THE WARMEST SINCE 2007. AVERAGE IS
       62.7F.
 2015 WAS THE WARMEST YEAR OF RECORD...EXCEEDING THE PREVIOUS
WARMEST YEAR OF 45.2F SET IN 2012. 22 RECORD HIGH TEMPERATURES WERE
SET DURING THE YEAR. THIS WAS THE 37TH WETTEST OF RECORD. SNOWFALL
WAS THE 14TH LOWEST OF RECORD.

GREAT FALLS...
 MAR...PRECIPITATION OF 0.09 INCHES WAS THE SECOND DRIEST OF RECORD,
       AND THE DRIEST SINCE 1916. AVERAGE IS 0.91 INCHES.
       AVERAGE TEMPERATURE OF 43.6 DEGREES WAS THE SECOND WARMEST OF
       RECORD, AND THE WARMEST SINCE 1986. AVERAGE IS 34.2.
       TOTAL SNOWFALL OF 0.8 INCHES WAS THE SECOND LOWEST OF RECORD,
       AND THE LOWEST AMOUNT SINCE 1986. AVERAGE IS 11.9 INCHES.
 MAY...AVERAGE WIND SPEED OF 8.3 MPH WAS THE THIRD LOWEST OF
       RECORD.
 JUN...AVERAGE WIND SPEED OF 7.7 MPH WAS THE THIRD LOWEST OF
       RECORD. THIS IS THE LOWEST AVERAGE SINCE 1967.
       PRECIPITATION OF 0.44 INCHES WAS THE DRIEST OF RECORD. THE
       OLD RECORD WAS 0.52 INCHES SET IN 1960.
 OCT...PRECIPITATION OF 2.48 INCHES WAS THE FIFTH WETTEST OF
       RECORD, AND THE WETTEST SINCE 1992. AVERAGE IS 0.86 INCHES.
 NOV...AVERAGE WIND SPEED OF 31.4 MPH ON THE 17TH WAS THE WINDIEST
       DAY SINCE 1990.
 SPRING (MAR-MAY)...AVERAGE TEMPERATURE OF 48.2 DEGREES WAS THE
       FOURTH WARMEST OF RECORD, AND THE WARMEST SINCE 2007. AVERAGE
       IS 45.1.
       SNOWFALL OF 1.6 INCHES IS THE THIRD LOWEST OF RECORD, AND THE
       LOWEST SINCE 1946.
 FALL (SEP-NOV)...PRECIPITATION OF 6.57 INCHES WAS THE WETTEST OF
       RECORD, EXCEEDING THE OLD RECORD OF 6.41 INCHES SET IN 1910.
       AVERAGE IS 2.87 INCHES.
 2015 WAS THE 46TH WETTEST OF RECORD. FOR SNOWFALL, THIS WAS THE
51ST LIGHTEST ANNUAL SNOWFALL OF RECORD. IT WAS THE LEAST AMOUNT OF
SNOW IN A CALENDAR YEAR SINCE 2004.

HAVRE...
 MAR...AVERAGE TEMPERATURE OF 41.2 DEGREES WAS THE THIRD WARMEST OF
       RECORD, AND THE WARMEST SINCE 1986. AVERAGE IS 32.8.
       TOTAL SNOWFALL OF A TRACE TIED FOR THE SECOND LOWEST OF RECORD,
       AND THE LOWEST SINCE 2007.
 MAY...PRECIPITATION OF 0.49 INCHES WAS THE FIFTH DRIEST OF RECORD,
       AND THE DRIEST SINCE 1985.
 JUL...PEAK WIND GUST OF 72 MPH ON THE 4TH IS THE SECOND HIGHEST JULY
       GUST AND THE HIGHEST SINCE 1961. ITS ALSO THE HIGHEST GUST AT
       HAVRE SINCE JUNE 2006.
 NOV...PEAK WIND GUST OF 66 MPH ON THE 18TH IS THE HIGHEST NOVEMBER
       GUST SINCE 1990. AVERAGE WIND SPEED OF 28.6 MPH ON THE 13TH
       IS STRONGEST IN NOVEMBER SINCE 1978, AND THE THIRD STRONGEST
       NOVEMBER AVERAGE OF RECORD.
       AVERAGE WIND SPEED OF 12.3 MPH FOR THE MONTH IS THE 4TH HIGHEST
       OF RECORD.
 SPRING (MAR-MAY)...SNOWFALL OF 0.2 INCHES TIED FOR THE FOURTH
       LOWEST OF RECORD, AND THE LOWEST SINCE 1959.
 THIS WAS THE 66TH WETTEST YEAR OF RECORD. THIS WAS THE 19TH LOWEST
SNOWFALL AMOUNT FOR THE YEAR.

HELENA...
 MAR...AVERAGE TEMPERATURE OF 44.7 DEGREES WAS THE SECOND WARMEST OF
       RECORD, AND THE WARMEST SINCE 1910. AVERAGE IS 36.3.
       TOTAL SNOWFALL OF A TRACE TIED FOR THE SECOND LOWEST OF RECORD,
       AND THE LOWEST AMOUNT SINCE 1999. AVERAGE IS 6.2 INCHES.
 APR...TOTAL SNOWFALL OF A TRACE TIED FOR THE SECOND LOWEST OF RECORD,
       AND THE LOWEST AMOUNT SINCE 2014. AVERAGE IS 3.7 INCHES.
 JUN...AVERAGE TEMPERATURE OF 69.6 DEGREES WAS THE WARMEST OF
       RECORD. THE OLD RECORD WAS 68.5F IN 1961. AVERAGE IS 62.1.
 OCT...AVERAGE WIND SPEED OF 19.1 MPH ON THE 11TH WAS THE WINDIEST
       OCTOBER DAY SINCE 2003.
       AVERAGE TEMPERATURE OF 51.3F WAS THE THIRD WARMEST OF RECORD.
       THE WARMEST OCCURRED LAST YEAR. AVERAGE IS 46.5F.
 DEC...PEAK WIND GUST OF 68 MPH ON THE 9TH WAS THE HIGHEST OF RECORD
       FOR DECEMBER. THE OLD RECORD WAS 67 MPH IN 1956.
 SPRING (MAR-MAY)...SNOWFALL OF A TRACE IS THE LOWEST OF RECORD. THIS
       EXCEEDS THE PREVIOUS LOW OF 0.6 INCHES SET IN 2007. AVERAGE
       IS 10.8 INCHES.
       THE AVERAGE TEMPERATURE OF 48.2F IS THE 4TH WARMEST OF RECORD,
       AND THE WARMEST SINCE 2007. AVERAGE IS 45.1F.
 SUMMER (JUN-AUG)...AVERAGE TEMPERATURE OF 69.5F WAS THE 5TH WARMEST
       OF RECORD, AND THE WARMEST SINCE 2007. AVERAGE IS 66.8F.
 ANNUAL AVERAGE WIND SPEED OF 6.3 MPH IS THE SIXTH LOWEST OF RECORD,
       AND THE LOWEST SINCE 2010. AVERAGE IS 6.6 MPH.
 2015 WAS THE 2ND WARMEST YEAR...THE WARMEST SINCE 2007. THIS WAS
THE 35TH DRIEST OF RECORD. THIS YEAR RANKED AS THE 4TH LOWEST
SNOWFALL OF RECORD...THE LOWEST SINCE 2007.

LEWISTOWN...
 MAR...AVERAGE TEMPERATURE OF 42.4 DEGREES WAS THE SECOND WARMEST OF
       RECORD, AND THE WARMEST SINCE 1910. AVERAGE IS 32.9.
 JUN...AVERAGE WIND SPEED OF 6.7 MPH WAS THE FOURTH LOWEST OF RECORD.
       THIS WAS THE LOWEST AVERAGE SINCE 1982.
 NOV...PEAK WIND GUST OF 74 MPH ON THE 18TH SET A DAILY RECORD AND IS
       THE SECOND HIGHEST NOVEMBER GUST OF RECORD.
       AVERAGE WIND SPEED OF 27.6 MPH ON THE 13TH IS THE WINDIEST DAY
       IN NOVEMBER SINCE 1998 AND THE 4TH WINDIEST NOVEMBER DAY OF
       RECORD.
 SPRING (MAR-MAY)...AVERAGE TEMPERATURE OF 45.3 DEGREES WAS THE
       FIFTH WARMEST OF RECORD, AND THE WARMEST SINCE 1992. AVERAGE
       IS 41.4.
 THIS WAS THE 3RD WARMEST YEAR OF RECORD, AND THE WARMEST SINCE 2000.
THIS WAS ALSO THE 29TH DRIEST OF RECORD.

WEST YELLOWSTONE...
 FEB...SNOWFALL OF 4.0 INCHES IS LOWEST OF RECORD, EXCEEDING THE PREVIOUS
       LOWEST OF 4.6 INCHES SET IN 1977. AVERAGE IS 25.8 INCHES.
 MAR...PRECIPITATION OF 0.38 INCHES WAS THE FIFTH DRIEST OF RECORD, AND
       THE DRIEST SINCE 2007. AVERAGE IS 1.63 INCHES.
       AVERAGE TEMPERATURE OF 22.6 DEGREES WAS THE FIFTH WARMEST OF
       RECORD, AND THE WARMEST SINCE 1992. AVERAGE IS 15.2.
 APR...SNOWFALL OF 4.6 INCHES IS THE FOURTH LOWEST OF RECORD, AND THE
       LOWEST SINCE 1979.
 JUN...AVERAGE TEMPERATURE OF 56.4 DEGREES WAS THE FIFTH WARMEST OF
       RECORD, AND THE WARMEST SINCE 1988. AVERAGE IS 51.8.
 OCT...AVERAGE TEMPERATURE OF 41.9 DEGREES WAS THE FIFTH WARMEST OF
       RECORD, AND THE WARMEST SINCE 1988. AVERAGE IS 35.6F.
 WINTER (DEC-FEB)...AVERAGE TEMPERATURE OF 19.1 DEGREES WAS THE THIRD
       WARMEST OF RECORD, AND THE WARMEST SINCE 1980-81. AVERAGE
       IS 12.7F.
 SPRING (MAR-MAY)...SNOWFALL OF 7.2 INCHES IS THE THIRD LOWEST OF
       RECORD, AND THE LOWEST SINCE 1934. AVERAGE IS 35.4 INCHES.
 THIS WAS THE 44TH DRIEST YEAR OF RECORD, AND THE 8TH LOWEST ANNUAL
SNOWFALL.


                             NEW RECORD
            TEMPERATURE WARM|       DAILY WIND        DAILY
            HIGHS  LOWS LOWS| HIGH AVG LOW AVG  GUST   PRECIP
BOZEMAN       16    2    5      3        6      12      7
CUT BANK       8    0    1      5        2       9      3
DILLON        22    0   20      2        4      10      5
GREAT FALLS    9    0    7      1        6       5      3
HAVRE          9    2    3      6        1       6      1
HELENA        18    0    7      5        6       7      1
LEWISTOWN      8    0   10      4        2       7      1
W YELLOWSTONE  9    0    4                              3


THE FOLLOWING IS A SUMMARY OF SIGNIFICANT WEATHER EVENTS AND PATTERNS
DURING THE YEAR...

2015...
JANUARY...
A RIDGE OF HIGH PRESSURE ALOFT ALONG THE WEST COAST DOMINATED THE
WEATHER IN JANUARY. THIS RESULTED
IN ABOVE NORMAL TEMPERATURES ACROSS THE AREA. TEMPERATURES
WERE AS MUCH AS SEVEN DEGREES ABOVE NORMAL AT DILLON PRECIPITATION
WAS ABOVE NORMAL ACROSS CENTRAL AND NORTH CENTRAL MONTANA, AND BELOW
NORMAL IN THE SOUTHWEST. BELOW NORMAL TEMPERATURES DOMINATED FOR THE
FIRST HALF OF THE MONTH, AS MUCH AS 30 DEGREES BELOW NORMAL. HEAVY
SNOW FELL FROM CUT BANK, THROUGH GREAT FALLS AND TO THE SOUTHEAST.
GREAT FALLS PICKED UP 15 INCHES OF SNOW ON THE 4TH AND 5TH. WARMER
CONDITIONS ON THE 7TH PRODUCED WIND GUSTS TO 68 MPH WEST OF CHOTEAU.
THE SECOND HALF OF THE MONTH WAS GENERALLY DRY AND MILD. RECORD HIGH
TEMPERATURES WERE SET DURING THIS PERIOD. ON THE 25TH, HELENA TIED
THEIR ALL-TIME JANUARY TEMPERATURE OF RECORD, REACHING 63F. GREAT
FALLS DID THE SAME, REACHING 67F.
DILLON TIED FOR THEIR DRIEST JANUARY OF RECORD, WITH ONLY A TRACE.

          HIGH                       LOW
TEMP      70F AT FORT BENTON/CHOTEAU -32F AT WEST YELLOWSTONE &
                                             NORTH OF RUDYARD
PRECIP    2.57 INCHES AT MARIAS PASS
WIND GUST   85 MPH WEST OF CHOTEAU (18TH)

FEBRUARY...
TEMPERATURES WERE ABOVE NORMAL FOR THE REGION. AFTER A PERIOD WITH
TEMPERATURES 30 DEGREES ABOVE NORMAL, THEY SETTLED TO GENERALLY ABOVE
NORMAL THROUGH THE 20TH. THE MONTH ENDED WITH BELOW NORMAL
TEMPERATURES.
DILLON HAD THEIR FIFTH WARMEST FEBRUARY OF RECORD, AND THEIR WARMEST
SINCE 1992.
PRECIPITATION WAS BELOW NORMAL. A SMALL AREA OF ABOVE NORMAL
PRECIPITATION STRETCHED FROM THE ROCKY MOUNTAINS WEST OF CHOTEAU,
THROUGH THE LITTLE BELTS, THEN NORTHEAST THROUGH CHOUTEAU AND FERGUS
COUNTIES. SNOWFALL WAS ON THE LIGHT SIDE. WEST YELLOWSTONE RECORDED
ONLY 4 INCHES, THEIR LIGHTEST OF RECORD.
WINDS WERE ABOVE NORMAL. AT BOZEMAN IT WAS THEIR SIXTH WINDIEST OF
RECORD. CUT BANK RECORDED A GUST TO 75 MPH ON THE SIXTH, THEIR
STRONGEST FEBRUARY GUST SINCE 2011.

          HIGH                      LOW
TEMP      68F AT GRASS RANGE/LOMA  -29F AT ELK PARK  24TH
PRECIP    5.60 INCHES AT MANY GLACIER
WIND GUST  78 MPH AT HEART BUTTE 6TH

MARCH...
RIDGING ALOFT PRODUCED A WARM AND DRY MONTH. CUT BANK, GREAT FALLS
AND HAVRE RECORDED THEIR WARMEST MARCH SINCE 1986. MEANWHILE BOZEMAN
AND HELENA RECORDED THEIR THIRD WARMEST. TEMPERATURES WERE AS MUCH AS
9.5 DEGREES ABOVE NORMAL AT LEWISTOWN.
PRECIPITATION WAS BELOW NORMAL. THIS WAS THE SECOND DRIEST MARCH OF
RECORD AT GREAT FALLS. THE CALENDAR-YEAR HAS BEEN DRY IN THE SOUTHWEST.
WEST YELLOWSTONE HAS RECORDED 2.52 INCHES FOR THIS PERIOD, THE DRIEST
SINCE 1979. SNOWFALL HAS ALSO BEEN LACKING. THEIR SNOWFALL OF 3.5
INCHES FOR THE YEAR IS THE LOWEST AMOUNT HERE SINCE 1931.
SUSTAINED NORTHWEST FLOW TO THE AREA IN MARCH. TEMPERATURES AVERAGED
BELOW NORMAL, AS MUCH AS SIX DEGREES AT CUT BANK. PRECIPITATION WAS
GENERALLY ABOVE NORMAL. BOZEMAN MSU HAD THEIR WETTEST MARCH OF
RECORD. ALSO AT MANY GLACIER, HEAVY PRECIPITATION FELL, THEY ALSO SET
A NEW MARCH RECORD OF 9.90 INCHES.

          HIGH                      LOW
TEMP      80F AT LOMA  28TH        -23F AT WHISKEY CREEK  4TH
PRECIP    3.07 INCHES AT ST MARY   7.00 INCHES AT MANY GLACIER
WIND GUST 81 MPH NEAR STANFORD  28TH

APRIL...
THERE WERE NO COLD OR WARM PERIODS IN APRIL. TEMPERATURES WERE CLOSE
TO NORMAL UNDER GENERALLY WESTERLY FLOW ALOFT. AVERAGE TEMPERATURES
WERE FROM 2.5 DEGREES BELOW NORMAL AT THREE FORKS TO 2.3 DEGREES
ABOVE NORMAL AT LEWISTOWN.
PRECIPITATION AMOUNTS VARIED WIDELY. A BAND OF ABOVE NORMAL
PRECIPITATION EXTENDED FROM NEAR DILLON TO LEWISTOWN. ELSEWHERE,
ACROSS NORTHERN PORTIONS, PRECIPITATION WAS 15 TO 20 PERCENT OF
NORMAL. THIS WAS THE DRIEST APRIL SINCE 1987 AT CUT BANK.

          HIGH                         LOW
TEMP      85F AT CHINOOK  29           1F AT WHISKEY CREEK  2
PRECIP    3.17 INCHES AT NORRIS MADISON 5.20 AT BRACKETT CREEK
WIND GUST  64 MPH AT FORT BENTON AND RUDYARD  12

MAY...
CONVERGING FLOWS ALOFT BROUGHT SLIGHTLY BELOW NORMAL TEMPERATURES TO
NORTHERN MONTANA AND ABOVE NORMAL IN THE SOUTHWEST. MUCH OF THE
SOUTHWEST AND AND AREA FROM CONRAD TO WHITE SULPHUR SPRINGS REPORTED
ABOVE NORMAL PRECIPITATION. BELOW NORMAL PRECIPITATION FELL OVER
GLACIER NATIONAL PARK. BOZEMAN HAD THEIR FIFTH WETTEST MAY OF RECORD.
WINDS WERE BELOW NORMAL, EXCEPT AT HAVRE. CUT BANK HAD THEIR SECOND
CALMEST MAY OF RECORD, AND THE LIGHTEST MAY WINDS SINCE 1957.

          HIGH                      LOW
TEMP      84F AT CHINOOK  31        13F AT CARROT BASIN    9
PRECIP    4.22 INCHES AT ADEL         7.70 AT CRYSTAL LAKE
WIND GUST  60 MPH AT TWO MEDICINE  1
           70 AT DEEP CREEK  2

JUNE...
A HIGH PRESSURE RIDGE OVER THE WESTERN US DOMINATED THE WEATHER IN
JUNE. AFTER A BRIEF COOL PERIOD MID-MONTH, TEMPERATURES SOARED TO
RECORD VALUES FOR THE LAST FEW DAYS OF THE MONTH. LOMA REACHED 104F,
WHILE HELENA SET AN ALL-TIME WARM READING FOR JUNE, REACHING 103F ON
THE 27TH. THE GREATEST WARM ANOMALY WAS OVER THE HELENA VALLEY, WHERE
IS WAS 7.5F ABOVE NORMAL. AT HELENA, THE MONTH AVERAGED THEIR WARMEST
JUNE OF RECORD, EXCEEDING A RECORD SET IN 1934. AT MOST LOCATIONS,
THIS WAS THEIR WARMEST JUNE SINCE 1988.
JUNE PRODUCED LITTLE PRECIPITATION OVER MOST AREAS. AT GREAT FALLS,
IT WAS THEIR DRIEST OF RECORD, EXCEEDING A RECORD SET IN 1960. THE
WETTEST AREA FOR THE MONTH WAS OVER EASTERN FERGUS COUNTY.
ON THE 30TH, SMOKE FROM FIRES IN SASKATCHEWAN MOVED INTO NORTHERN
MONTANA. VISIBILITY DROPPED TO LESS THAN ONE-QUARTER MILE AT FORT
BELKNAP AND NORTHERN PORTIONS OF BLAINE COUNTY.

          HIGH                      LOW
TEMP     104F AT LOMA  28           27F AT WISDOM  14
PRECIP    3.57 INCHES NEAR LEWISTOWN   5.70 INCHES AT CRYSTAL LAKE
WIND GUST  64 MPH NEAR DILLON  29

JULY...
JULY`S TEMPERATURES AVERAGED CLOSE TO NORMAL ACROSS THE REGION.
LEWISTOWN WAS 1.5F ABOVE NORMAL, WHILE VALUES AVERAGED 2.5F BELOW
NORMAL AT WEST YELLOWSTONE. THE WARMEST AREA WAS OVER NORTHERN FERGUS
COUNTY.
PRECIPITATION AMOUNTS WERE GENERALLY ABOVE NORMAL. ALONG THE NORTHERN
ROCKY MOUNTAIN FRONT, BELOW NORMAL PRECIPITATION FELL. HEAVY RAIN
OVER PORTIONS OF THE HI-LINE PUSHED AMOUNTS TO 5.33 INCHES NEAR
HOGELAND. A THUNDERSTORM COMPLEX MOVED ACROSS THE HI-LINE ON THE
EVENING OF JULY 4. WIND GUSTS TO 72 MPH WERE REPORTED AT HAVRE AND 91
MPH AT BIG SANDY. WIDESPREAD WIND AND HAIL DAMAGE WAS REPORTED TO
CROPS, TREES AND BUILDINGS.

          HIGH                      LOW
TEMP      99F AT HELENA   4         27F AT WEST YELLOWSTONE  30
PRECIP    5.33 INCHES NEAR HOGELAND   6.30 INCHES AT BRACKETT CREEK
WIND GUST  91 MPH AT BIG SANDY  4

AUGUST...
WITH HIGH PRESSURE ALOFT, WARMER THAN NORMAL TEMPERATURES DOMINATED
IN AUGUST. PRECIPITATION WAS BELOW NORMAL. THERE WERE A FEW RECORD
HIGH TEMPERATURES SET DURING THE MONTH. A COOL PERIOD AROUND THE
22ND BROUGHT THE FIRST FROST TO PORTIONS OF THE AREA. SMOKE FROM
WESTERN FIRES WAS A MAJOR FACTOR THIS MONTH. IT BROUGHT EXTENDED
PERIODS OF LOWER AIR QUALITY AND LOWERED VISIBILITIES TO THE AREA.
THUNDERSTORMS PRODUCED WINDS TO 71 MPH NEAR DENTON ON THE 14TH.
TEMPERATURES DROPPED TO 32F AT BOZEMAN AIRPORT ON THE 23RD, THEIR
EARLIEST FREEZING TEMPERATURE SINCE 1968. THUNDERSTORMS AGAIN PUSHED
THROUGH CENTRAL MONTANA ON THE 29TH. GUSTS REACHED 59 MPH AT GREAT
FALLS AND 68 MPH AT HAVRE.

          HIGH                      LOW
TEMP     102F NEAR CASCADE  14      19F AT NEWLAN CREEK RAWS  23
PRECIP   2.38 INCHES NEAR LEWISTOWN   3.30 INCHES AT CRYSTAL LAKE
WIND GUST  82 MPH AT DEEP CREEK RAWS 31

SEPTEMBER...
AS THE RIDGE ALONG THE WEST COAST DISAPPEARED DURING SEPTEMBER,
REGULAR WEATHER DISTURBANCES MOVED ACROSS THE STATE. TEMPERATURES
GENERALLY AVERAGED ABOVE NORMAL, WITH NEAR TO ABOVE NORMAL
PRECIPITATION. THE EARLY PART OF THE MONTH BROUGHT VERY HEAVY RAIN
TO MUCH OF THE AREA. RAINFALL EXCEEDED TWO INCHES FELL AROUND CUT
BANK AND THE LINCOLN AREA, WITH 1.5 INCH AMOUNTS FROM WISDOM,
THROUGH CASCADE, CHESTER, CONRAD AND JOPLIN. MID MONTH, ANOTHER
WEATHER SYSTEM BROUGHT HEAVY RAIN TO CENTRAL MONTANA.AT THE END OF
THE MONTH, TEMPERATURES WARMED TO RECORD VALUES AT SEVERAL
LOCATIONS.

          HIGH                     LOW
TEMP      95F AT VALENTINE  25     13F AT GATES PARK    28
PRECIP    3.18 INCHES NEAR NEIHART   5.50 INCHES AT LAKEVIEW RIDGE
WIND GUST  85 MPH AT DEEP CREEK RAWS  21

OCTOBER...
NORTHWEST FLOW ALOFT PREVAILED DURING OCTOBER. TEMPERATURES AVERAGED
ABOVE NORMAL, AS MUCH AS 7F ABOVE NORMAL AT LEWISTOWN, WITH A WIDE
RANGE IN PRECIPITATION. CASCADE COUNTY AND AREAS AROUND HAVRE AND
CHINOOK WERE ABOVE NORMAL. THE ROCKY MOUNTAIN FRONT AND MUCH OF
SOUTHWEST MONTANA WERE BELOW NORMAL. A SHORT PERIOD OF BELOW NORMAL
TEMPERATURES EXISTED AT THE START OF THE MONTH. RAINFALL OF OVER
THREE INCHES FELL OVER CASCADE AND CHOUTEAU COUNTIES. THE EVENT
ENDED WITH 3.7 INCHES OF SNOW FALLING AT GREAT FALLS. WINDY
CONDITIONS RETURNED BY THE 11TH. GUSTS REACHED INTO THE 60 MPH RANGE
DURING THIS WINDY PERIOD.

          HIGH                      LOW
TEMP      89F AT VALENTINE  10       9F AT WEST YELLOWSTONE  28
PRECIP    3.07 INCHES AT GREAT FALLS
WIND GUST  83 MPH NEAR PENDROY   11

NOVEMBER...
DURING NOVEMBER, UPPER LEVEL FLOW WAS AGAIN FROM THE NORTHWEST.
TEMPERATURES AVERAGED BELOW NORMAL MOST AREAS, UP TO 7 DEGREES BELOW
AVERAGE AT WISDOM. THEY RECORDED THEIR 3RD COOLEST NOVEMBER OF
RECORD. WHILE HEAVY RAIN WAS FALLING WEST OF THE DIVIDE, WINDY
CONDITIONS PREVAILED EAST DURING THE FIRST FEW DAYS OF THE MONTH.
BABB REPORTED A GUST TO 71 MPH ON THE 6TH. AFTER A BRIEF RESPITE
FROM THE WIND, WHEN COOLER AIR MOVED ACROSS, WINDS RETURNED BY THE
13TH. GUSTS REACHED 91 MPH AT BABB ON THE 13TH. A STRONG SYSTEM,
ACCOMPANIED BY A STRONG UPPER LEVEL JET STREAM AND RAPIDLY MOVING
COLD FRONT BROUGHT HIGH GUSTS ACROSS THE REGION ON THE 17TH AND
18TH. GUSTS REACHED 79 MPH AT BROWNING AND 87 MPH NEAR DENTON. THE
HIGHEST GUST WAS 108 MPH IN THE SWEET GRASS HILLS. POWER LINES
SNAPPED AND SEVERAL SEMIS AND TRAILERS WERE BLOWN OVER.BY
THANKSGIVING, ANOTHER WINTER STORM BROUGHT HEAVY SNOW TO THE REGION.
UP TO 9 INCHES FELL IN THE GREAT FALLS AREA.

          HIGH                        LOW
TEMP      69F AT ARMELLS CK RAWS  8   -26F AT RED ROCK RAWS  27
PRECIP    8.66 INCHES AT GOAT HAUNT
WIND GUST  108 MPH AT FRED AND GEORGE (TOOLE)  18

DECEMBER...
UNDER GENERALLY WESTERLY FLOW ALOFT, TEMPERATURES WERE NEAR TO SLIGHTLY ABOVE
NORMAL ACROSS THE REGION. THE GREATEST POSITIVE DEPARTURE WAS AT
CHESTER...4.8F ABOVE NORMAL. DILLON UMW AVERAGED 1.2F BELOW NORMAL.
PRECIPITATION WAS MOSTLY ABOVE NORMAL. HEAVY PRECIPITATION FELL ALONG
THE ROCKY MOUNTAINS ON THE 7TH. THIS CAUSED A RISE IN SOME RIVERS IN
THE AREA, BUT MOSTLY AFFECTED WESTERN MONTANA. ON THE 8TH, THE
STRONGEST WINDS OF THE MONTH WERE RECORDED, WITH GUSTS TO 86 MPH AT
DEEP CREEK RAWS. EVEN ON THE 9TH, GUSTS REACHED 76 MPH AT CASCADE. A
STORM SYSTEM AFFECTED MUCH OF THE STATE ON THE 14-16TH. SNOWFALL
REACHED THREE-FEET AT TIZER GARDENS, AND 15" NEAR STOCKETT. OTHER
HIGH AMOUNTS WERE REPORTED ACROSS SOUTHWEST MONTANA. GREAT FALLS SET
AN ALL-TIME DECEMBER 24-HOUR PRECIPITATION RECORD, MEASURING
0.77" ON THE 14TH. THE MONTH CLOSED OUT WITH BELOW NORMAL
TEMPERATURES. THE COLDEST TEMPERATURES OF THE MONTH OCCURRED ON THE
27TH, WITH READINGS AS LOW AS -28F NEAR WEST YELLOWSTONE.
IMPRESSIVE PRECIPITATION AND SNOWFALL TOTALS WERE REPORTED AT SEVERAL
SOUTHWESTERN LOCATIONS. BOZEMAN MSU HAD THEIR THIRD SNOWIEST DECEMBER
OF RECORD, 28.6-INCHES. EVEN ALONG THE ROCKY MOUNTAINS, MANY GLACIER
MEASURED 7.4 INCHES AND MARIAS PASS HAD 3.54 INCHES.

          HIGH                      LOW
TEMP      64F AT FORT BENTON  09   -28F NEAR WEST YELLOWSTONE  27
PRECIP   10.20 INCHES AT BLACK BEAR SNOTEL
WIND GUST   86 MPH AT DEEP CREEK RAWS  8

$$
&&

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