Climatological Report (Annual)
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MTZ008>015-044>055-101800-

AREA ANNUAL CLIMATE SUMMARY
NATIONAL WEATHER SERVICE GREAT FALLS MT
820 AM MST TUE JAN 28 2019

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

...2019 WEATHER SUMMARY FOR NORTH CENTRAL AND SOUTHWEST MONTANA...

AVERAGE TEMPERATURE / NORMAL/ DEPARTURE FROM NORMAL
 GREAT FALLS....43.4 / 44.6... -1.2...17TH COOLEST YEAR OF RECORD.
 HAVRE..........40.9 / 43.5... -2.6...28TH COOLEST YEAR OF RECORD.
 HELENA.........44.7 / 45.3... -0.7...56TH COOLEST YEAR OF RECORD.
 BOZEMAN........42.3 / 42.8... -0.5...36TH COOLEST YEAR OF RECORD.
 CUT BANK.......40.2 / 42.1... -1.9...28TH COOLEST YEAR OF RECORD.
 DILLON.........41.4 / 42.8... -1.4... 7TH COOLEST YEAR OF RECORD.
 LEWISTOWN......41.4 / 43.1... -1.7...29TH COOLEST YEAR OF RECORD.
 W YELLOWSTONE..34.3 / 34.4... -0.1...23RD COOLEST YEAR OF RECORD.

HIGHEST / LOWEST TEMPERATURES
 GREAT FALLS....102 ON 08/10          /  -27 ON 01/01
 HAVRE..........105 ON 08/10          /  -36 ON 02/12
 HELENA.........100 ON 08/10          /  -17 ON 01/02
 BOZEMAN........102 ON 08/11          /  -20 ON 02/20
 CUT BANK.......102 ON 08/10          /  -30 ON 01/01
 DILLON......... 96 ON 08/10          /  -24 ON 01/02
 LEWISTOWN......101 ON 08/11          /  -25 ON 01/01
 W YELLOWSTONE.. 91 ON 08/11          /  -38 ON 02/20

 THE AREA EXTREMES WERE 108 AT ARMELLS CREEK IN AUGUST, AND -46 AT A
 LOCATION 31 MILES NORTH OF HAVRE IN FEBRUARY.


     PRECIPITATION / NORMAL / DEPARTURE FROM NORMAL / MOST IN 24 HRS
 GREAT FALLS....14.96 / 14.75 /    +0.21 /        1.40 ON 05/11
 HAVRE.......... 9.87 / 11.20 /    -1.33 /        0.57 ON 09/20
 HELENA.........12.92 / 11.22 /    +1.70 /        0.95 ON 05/31
 BOZEMAN........15.60 / 13.93 /    +1.67 /        0.84 ON 06/18
 CUT BANK......E11.49 / 10.85 /    +0.64 /        0.81 ON 05/17
 DILLON......... 9.87 / 10.50 /    -0.63 /        0.67 ON 04/12
 LEWISTOWN......20.75 / 16.85 /    +3.90 /        2.25 ON 06/07
 W YELLOWSTONE..19.18 / 21.09 /    -2.14 /        0.84 ON 06/18

SOME TEMPERATURE, PRECIPITATION AND WIND HIGHLIGHTS AND RANKING...
BOZEMAN...THIS WAS THE 3RD CALMEST YEAR OF RECORD, THE CALMEST SINCE
          2010.
CUT BANK..SNOWFALL OF 79.9 INCHES WAS THE MOST IN ANY YEAR. THE OLD
          RECORD WAS 76.8 INCHES IN 2009.
      THIS WAS THE COOLEST YEAR SINCE 2002.
DILLON....THIS WAS THE COOLEST YEAR SINCE 1985.
GREAT FALLS...THIS WAS THE COOLEST YEAR SINCE 2002.
HAVRE.....SNOWFALL OF 60.3 WAS THE HIGHEST ANNUAL AMOUNT SINCE 2010.
          THIS WAS THE COOLEST YEAR SINCE 2010.
HELENA....THIS WAS THE WETTEST CALENDAR YEAR SINCE 2011.
LEWISTOWN..THIS WAS THE WETTEST CALENDAR YEAR SINCE 2011.
          THIS WAS ALSO THE COOLEST YEAR SINCE 1996.


SNOWFALL / DEPARTURE FROM NORMAL / MOST IN 24 HRS / MAX SNOW ON GRD
 GREAT FALLS.. 86.3 /+23.2 /  7.2 ON 02/07-08/ 10 INCHES ON 02/18
 HAVRE.........60.3 /+21.9 /  7.8 ON 02/08   / 26 INCHES ON 03/09
 HELENA........37.0 / -1.1 /  5.7 ON 03/04   /  9 INCHES ON 01/05
 BOZEMAN.......42.7 / +2.5 /  4.5 ON 03/04     12 INCHES ON 01/02
 CUT BANK......79.9 /+43.0 /  6.3 ON 02/08   / 10 INCHES ON 01/02
 DILLON........10.2 /-31.2    2.3 ON 02/18   /  5 INCHES ON 02/04
 LEWISTOWN....102.0 /+54.8   12.0 ON 02/05   / 24 INCHES ON 02/24
 BOZEMAN MSU..110.3 /+19.3 /  7.4 ON 04/02   / 18 INCHES ON 01/10
 W YELLOWSTON.125.7 /-34.9 /  8.5 ON 01/12   / 51 INCHES ON 03/04


AVERAGE WIND / DEPARTURE FROM NORMAL / PEAK WIND /MPH/
 GREAT FALLS....10.0 MPH / -1.2 / 61 MPH ON 12/29... 8TH CALMEST YR
 HAVRE.......... 9.8 MPH / +0.8 / 56 MPH ON 04/21...36TH WINDIEST YR
 HELENA......... 6.2 MPH / -0.7 / 54 MPH ON 12/12... 4TH CALMEST YR
 BOZEMAN........ 5.3 MPH / -0.6 / 53 MPH ON 02/04... 3TH CALMEST YR
 CUT BANK.......12.1 MPH / -0.6 / 68 MPH ON 12/13...15TH CALMEST YR
 DILLON......... 8.8 MPH / -0.1 / 63 MPH ON 02/16...13TH CALMEST YR
 LEWISTOWN...... 8.5 MPH / -0.8 / 57 MPH ON 08/02... 6TH CALMEST YR
 W YELLOWSTONE.. 5.5 MPH /      / 47 MPH ON 02/18

LAST SPRING FROST / FIRST FALL FROST               FREEZE FREE
                       AVERAGE            AVERAGE   DAYS   NORMAL
 GREAT FALLS....05/02   05/20   /  09/14   09/21    134     123
 HAVRE..........04/24   05/15   /  09/28   09/21    156     128
 HELENA.........04/26   05/15   /  10/03   09/24    159     130
 BOZEMAN........06/12   06/02   /  09/21   09/11    100     101
 CUT BANK.......05/12   05/24   /  09/05   09/11    115     109
 DILLON.........06/12   06/02   /  09/17   09/13     96     102
 LEWISTOWN......05/01   05/26   /  09/28   09/17    149     113
 W YELLOWSTONE..07/07   06/24   /  08/05   07/13      6      15

DAYS OF MAXIMUM TEMPERATURE 90F OR HIGHER / 32F OR LOWER
                  80F OR HIGHER AT WEST YELLOWSTONE
                    AVERAGE        AVERAGE
 GREAT FALLS.... 20    18    /  55   40
 HAVRE.......... 29    24    /  87   54
 HELENA......... 27    24    /  50   41
 BOZEMAN........ 20    22    /  49   45
 CUT BANK....... 15     8    /  73   48
 DILLON.........  9     8    /  56   45
 LEWISTOWN...... 10    11    /  53   44
 W YELLOWSTONE.. 26    40    / 104   91

DAYS WITH MINIMUM TEMPERATURE 32F OR LOWER / 0F OR LOWER
                     AVERAGE       AVERAGE
 GREAT FALLS.... 176   166   /  24   21
 HAVRE.......... 192   180   /  45   31
 HELENA......... 173   167   /  16   18
 BOZEMAN........ 200   178   /  19   22
 CUT BANK....... 199   183   /  35   27
 DILLON......... 203   191   /  16   14
 LEWISTOWN...... 193   181   /  28   21
 W YELLOWSTONE.. 261   256   /  51   55

DAYS WITH PRECIPITATION
                                                      T+
                =>0.01 NRM  =>0.10 NRM   =>0.50 NRM  SNOW  NRM
 GREAT FALLS....  86    99    41   40        9   4    67   69
 HAVRE.......... 100    84    41   33        2   4    61   55
 HELENA......... 103    88    38   33        5   4    68   62
 BOZEMAN........ 108   102    51   44        6   4    75   66
 CUT BANK.......  76    77    35   26        4   4
 DILLON.........  76    80    35   29        4   4
 LEWISTOWN...... 122   113    61   47       10   4

                     MONTHLY AVERAGE TEMPERATURE
     JAN   FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC
BZN  22.4 15.7 31.1 40.5 55.3 59.7 67.5 64.6 55.4 42.8 40.3 22.1
CTB  23.6  8.7 24.0 35.4 55.3 58.2 65.3 63.6 50.3 40.8 31.0 26.7
DLN  26.0 15.5 28.8 40.3 53.4 56.8 66.3 62.6 53.1 42.0 30.9 21.1
GTF  26.8 11.8 29.4 38.4 57.5 61.5 67.7 66.6 54.0 44.2 33.6 29.4
HVR  13.8  1.5 20.9 37.3 59.9 63.5 70.1 67.5 54.6 43.3 32.0 26.8
HLN  22.8 16.1 32.7 42.5 57.8 61.9 71.0 68.1 57.1 44.9 33.2 28.1
LWT  24.1 10.5 29.4 37.9 54.7 57.7 65.9 64.0 52.8 42.6 30.3 26.9
WYS  16.9 14.4 22.4 33.0 47.3 50.9 59.1 55.4 48.0 36.6 18.5 13.3

                          MONTHLY PRECIPITATION
     JAN   FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC
BZN  0.99 0.48 1.24 3.19 1.93 3.86 0.23 0.95 0.48 1.09 1.00 0.16
CTB  0.10 1.13 1.23 1.38 1.61 2.40 0.73 0.43 0.64 0.85 0.59 0.40
DLN  0.47 0.37 0.70 1.90 1.31 3.05   TR 0.78 0.30 0.58 0.29 0.12
GTF  0.35 1.43 0.97 1.48 3.52 3.30 0.12 0.67 1.44 0.70 0.65 0.33
HVR  0.48 1.66 0.69 0.55 1.31 1.32 0.49 0.62 1.78 0.30 0.49 0.18
HLN  0.34 1.09 1.18 1.61 3.26 3.36 0.01 0.40 0.76 0.53 0.22 0.16
LWT  0.52 1.47 0.73 1.75 5.10 5.63 0.62 1.13 1.52 0.76 1.36 0.16
WYS  2.13 2.90 1.21 1.86 3.20 2.76 0.58 0.85 0.13 1.09 1.43 1.04

                          MONTHLY SNOWFALL
     JAN   FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC
BZN  5.2   9.5  6.6  8.7    0    0    0    0  0.5  2.0  8.5  5.5
MSU 15.5  15.3  9.6 24.9    0    0    0    0   TR 12.5 13.6 18.9
CTB  2.8  26.5  7.6 16.4    0    0    0    0    0  3.8 14.6  8.2
DLN  0.1   4.5  1.3  0.6    0    0    0    0    0    0  3.3  0.4
GTF  3.6  32.6 12.4 20.2    0    0    0    0  0.1  2.2 10.1  5.1
HVR 10.4  31.8  5.3  8.9    0    0    0    0    0  1.3  1.3  1.3
HLN  3.4  12.5 10.7  6.1    0    0    0    0    0  0.4  1.9  2.0
LWT 13.2  33.1 10.4 21.3    0    0    0    0  0.5  2.0 11.5 20.0
WYS 36.0  28.6 16.0  4.6  3.0    0    0    0    0  2.0 17.1 18.4



MILESTONES REACHED DURING 2018...
BOZEMAN...
 APR...PRECIPITATION OF 3.19 INCHES TIED 2003 FOR THE WETTEST OF
       RECORD. AVERAGE IS 1.57".
       AVERAGE WIND SPEED OF 6.3 MPH WAS THE FIFTH CALMEST OF RECORD,
       AND LOWEST AVERAGE SINCE 2009. AVERAGE IS 7.0 MPH.
 MAY...AVERAGE TEMPERATURE OF 55.3F WAS THE SIXTH WARMEST OF RECORD,
       AND THE WARMEST SINCE 1985. AVERAGE IS 51.4F.
       AVERAGE WIND SPEED OF 5.7 MPH WAS THE SECOND CALMEST OF
       RECORD, AND LOWEST AVERAGE SINCE 2012. AVERAGE IS 6.8 MPH.
 JUL...PRECIPITATION OF 0.13 INCHES WAS THE SIXTH LOWEST OF RECORD,
       AND THE DRIEST SINCE 2007. AVERAGE IS 1.12".
       AVERAGE WIND SPEED OF 5.3 MPH WAS THE THIRD CALMEST OF RECORD,
       AND LOWEST AVERAGE SINCE 2009. AVERAGE IS 6.2 MPH.
 AUG...AVERAGE WIND SPEED OF 5.5 MPH WAS THE SEVENTH CALMEST OF
       RECORD, AND LOWEST AVERAGE SINCE 2017. AVERAGE IS 6.3 MPH.
 SEP...AVERAGE WIND SPEED OF 5.1 MPH WAS THE SIXTH CALMEST OF RECORD,
       AND LOWEST AVERAGE SINCE 2014. AVERAGE IS 5.9 MPH.
 NOV...AVERAGE WIND SPEED OF 4.2 MPH WAS THE EIGHTH CALMEST OF
       RECORD, AND LOWEST AVERAGE SINCE 2016. AVERAGE IS 5.2 MPH.
 SPRING (MAR-MAY)...PRECIPITATION OF 6.36 INCHES WAS THE NINTH
       WETTEST OF RECORD AND WETTEST SINCE 2003. AVERAGE IS 4.86
       INCHES.
       AVERAGE WIND SPEED OF 6.0 MPH WAS THE FOURTH CALMEST OF
       RECORD, AND THE LOWEST AVERAGE SINCE 2015. AVERAGE IS 6.7 MPH.
 SUMMER (JUN-AUG)...AVERAGE WIND SPEED OF 5.5 MPH WAS THE FIFTH
       LOWEST OF RECORD AND LOWEST SINCE 2013. AVERAGE IS 6.2 MPH.
 FALL  (SEP-NOV)...AVERAGE WIND SPEED OF 4.7 MPH WAS THE THIRD LOWEST
       OF RECORD AND LOWEST SINCE 2013. AVERAGE IS 5.6 MPH.

CUT BANK...
 FEB...AVERAGE TEMPERATURE OF 8.7F WAS THE FOURTH COOLEST OF RECORD,
       AND THE COOLEST SINCE 1999. AVERAGE IS 24.2F.
       PRECIPITATION OF 1.13 INCHES WAS THE HIGHEST OF RECORD. THE
       PREVIOUS HIGH WAS 1.10 INCHES IN 1904. AVERAGE IS 0.21 INCHES.
       SNOWFALL OF 26.5 INCHES WAS THE HIGHEST OF RECORD. THE
       PREVIOUS HIGHEST WAS 15.6 IN 1958. AVERAGE IS 4.8 INCHES.
 MAR...PRECIPITATION OF 1.23 INCHES WAS THE FOURTH HIGHEST OF RECORD,
       AND THE HIGHEST SINCE 1987. AVERAGE IS 0.50 INCHES.
       AVERAGE WIND SPEED OF 9.9 MPH WAS THE FOURTH LOWEST OF RECORD,
       AND THE LOWEST SINCE 2006. AVERAGE IS 13.0 MPH.
 APR...SNOWFALL OF 16.4 INCHES WAS THE THIRD HIGHEST OF RECORD, AND
       THE HIGHEST SINCE 2009. AVERAGE IS 4.4 INCHES.
 MAY...AVERAGE TEMPERATURE OF 55.3F WAS THE SIXTH WARMEST OF RECORD,
       AND THE WARMEST SINCE 1958. AVERAGE IS 49.9F.
 SEP...AVERAGE WIND SPEED OF 9.0 MPH WAS THE THIRD LOWEST OF RECORD,
       AND THE LOWEST SINCE 2008. AVERAGE IS 11.1 MPH.
 NOV...SNOWFALL OF 14.6 INCHES WAS THE FIFTH HIGHEST OF RECORD, AND
       HIGHEST SINCE 2014. AVERAGE IS 9.3 INCHES.
 DEC...HIGHEST NUMBER OF CONSECUTIVE DAYS OF GUSTS OF 50 MPH OR
       HIGHER (7). OLD RECORD WAS 5 DAYS LAST SET IN DECEMBER 2013.

 BEFORE THE 102F IN AUGUST, THE LAST OCCURRENCE OF A 100F TEMPERATURE
       AT CUT BANK WAS IN JULY 2011.
 WINTER (DEC-FEB)...PRECIPITATION OF 2.33 INCHES WAS THE SIXTH
       HIGHEST OF RECORD, AND THE HIGHEST SINCE 2017. AVERAGE IS 0.61
       INCHES.
       SNOWFALL OF 41.7 INCHES WAS THE SECOND HIGHEST OF RECORD, AND
       HIGHEST SINCE 2009. AVERAGE IS 15.5 INCHES.
 SPRING (MAR-MAY)...SNOWFALL OF 24.0 INCHES WAS THE SEVENTH HIGHEST
       OF RECORD AND HIGHEST SINCE 2009. AVERAGE IS 13.4 INCHES.
       AVERAGE WIND SPEED OF 10.9 MPH WAS THE THIRD CALMEST OF
       RECORD, AND THE LOWEST AVERAGE SINCE 1958. AVERAGE IS 13.1
       MPH.
 FALL (SEP - NOV)...SNOWFALL OF 18.4 INCHES WAS THE NINTH HIGHEST
       OF RECORD AND HIGHEST SINCE 2014. AVERAGE IS 7.8 INCHES.


DILLON...
 FEB...AVERAGE TEMPERATURE OF 15.5F WAS THE THIRD COOLEST OF RECORD,
       AND THE COOLEST SINCE 1989. AVERAGE IS 26.2F.
 APR...PRECIPITATION OF 1.90 INCHES WAS THE NINTH HIGHEST OF RECORD,
       AND THE HIGHEST SINCE 2004. AVERAGE IS 1.07 INCHES.
 JUL...PRECIPITATION OF A TRACE WAS THE SECOND LOWEST OF RECORD,
       AND THE LOWEST SINCE 1996. AVERAGE IS 1.25 INCHES.

GREAT FALLS...
 FEB...AVERAGE TEMPERATURE OF 11.8F WAS THE FOURTH COOLEST OF RECORD,
       AND THE COOLEST SINCE 1989. AVERAGE IS 27.3F.
       SNOWFALL OF 32.6 INCHES TIED FOR THE HIGHEST OF RECORD, ALSO
       SET IN 2011. AVERAGE IS 8.3 INCHES.
 MAR...AVERAGE WIND SPEED OF 9.3 MPH WAS THE FIFTH LOWEST OF RECORD,
       AND THE LOWEST SINCE 1998. AVERAGE IS 12.2 MPH.
 APR...SNOWFALL OF 20.2 INCHES WAS THE EIGHTH HIGHEST OF RECORD, AND
       HIGHEST SINCE 2011. AVERAGE IS 11.6 INCHES.
 SEP...AVERAGE WIND SPEED OF 7.9 MPH WAS THE SECOND LOWEST OF RECORD,
       AND THE LOWEST SINCE 1950. AVERAGE IS 10.6 MPH.
 OCT...AVERAGE WIND SPEED OF 10.3 MPH WAS THE SEVENTH LOWEST OF
       RECORD,AND THE LOWEST SINCE 2015. AVERAGE IS 12.4 MPH.
 DEC...WINDIEST DECEMBER DAY OF RECORD SINCE 1993 WHEN AVERAGE SPEED
       ON THE 13TH WAS 28.5 MPH. MOST DAYS WITH GUSTS OF 50 MPH OR
       HIGHER (7) SINCE 1991. TIED FOR MOST CONSECUTIVE DAYS WITH
       WIND GUSTS OVER 50 MPH (3). LAST OCCURRED IN DECEMBER 2011.
 WINTER (DEC-FEB)...SNOWFALL OF 56.9 INCHES WAS THE SECOND HIGHEST OF
       RECORD, AND HIGHEST SINCE 2011. AVERAGE IS 25.8 INCHES.
 SPRING (MAR-MAY)...SNOWFALL OF 32.6 INCHES WAS THE NINTH HIGHEST OF
       RECORD, AND HIGHEST SINCE 2009. AVERAGE IS 23.3 INCHES.
       AVERAGE WIND SPEED OF 9.7 MPH WAS THE THIRD CALMEST OF RECORD,
       AND THE LOWEST AVERAGE SINCE 1965. AVERAGE IS 11.9 MPH.
 FALL   (SEP-NOV)...AVERAGE WIND SPEED OF 10.5 MPH WAS THE SECOND
       LOWEST OF RECORD AND LOWEST SINCE 2010. AVERAGE IS 12.4 MPH.

THE COLD THAT STARTED A STRING OF 5 CONSECUTIVE DAYS BELOW ZERO BEGAN
ON DECEMBER 28 2017. IT LASTED THROUGH JANUARY 1 2018. THIS STRETCH
WAS THE LONGEST SUCH STRETCH SINCE 1996.

HAVRE... FEB...AVERAGE TEMPERATURE OF 1.5F WAS THE FOURTH COOLEST OF
RECORD,       AND THE COOLEST SINCE 1936. AVERAGE IS 22.2F.
       PRECIPITATION OF 1.66 INCHES WAS THE HIGHEST OF RECORD. THE
     PREVIOUS HIGH WAS 1.47 INCHES IN 1888. AVERAGE IS 0.28 INCHES.

       SNOWFALL OF 31.8 INCHES WAS THE HIGHEST OF RECORD FOR
FEBRUARY, EXCEEDING THE OLD RECORD OF 19.2 INCHES SET IN 1888.
   AVERAGE IS 5.8 INCHES.
       AVERAGE WIND SPEED OF 11.9 MPH WAS THE EIGHTH HIGHEST OF
  RECORD, AND THE HIGHEST SINCE 2010. AVERAGE IS 8.9 MPH.  FEB AND
MAR...SNOW DEPTH OF 26 INCHES WAS DEEPEST SINCE FEB 1978.
 MAY...AVERAGE TEMPERATURE OF 59.9F WAS THE EIGHTH WARMEST OF
RECORD,       AND THE WARMEST SINCE 2001. AVERAGE IS 54.0F.
 WINTER (DEC-FEB)...PRECIPITATION OF 3.36 INCHES WAS THE SIXTH
 HIGHEST OF RECORD, AND THE HIGHEST SINCE 1979. AVERAGE IS 1.01
    INCHES.
       SNOWFALL OF 60.8 INCHES WAS THE THIRD HIGHEST OF RECORD, AND
     HIGHEST SINCE 1978. AVERAGE IS 19.8 INCHES.         SUMMER (JUN-
AUG)...PRECIPITATION OF 2.43 INCHES WAS THE EIGHTH        LOWEST OF
RECORD AND THE LOWEST SINCE 2017. AVERAGE IS 4.94        INCHES.
THE COLD THAT STARTED A STRING OF 8 CONSECUTIVE DAYS BELOW ZERO
BEGAN ON DECEMBER 25 2017. IT LASTED THROUGH JANUARY 1 2018. THIS
STRETCH WAS THE LONGEST SUCH STRETCH SINCE 1996.

HELENA... MAR...AVERAGE WIND SPEED OF 6.1 MPH WAS THE FIFTH LOWEST
OF RECORD,       AND THE LOWEST SINCE 1998. AVERAGE IS 7.5 MPH.
MAY...AVERAGE TEMPERATURE OF 57.8F WAS THE SEVENTH WARMEST OF
RECORD, AND THE WARMEST SINCE 2001. AVERAGE IS 54.0F.
       AVERAGE WIND SPEED OF 6.6 MPH WAS THE SECOND LOWEST OF
RECORD,       AND THE LOWEST SINCE 2014. AVERAGE IS 8.2 MPH.
JUL...PRECIPITATION OF 0.01 INCHES WAS THE LOWEST OF RECORD,
LOWER THAN THE PREVIOUS RECORD OF 0.07 INCHES SET IN 2005.
       AVERAGE IS 1.19 INCHES.
 WINTER (DEC-FEB)...AVERAGE WIND SPEED OF 4.9 MPH WAS THE FOURTH
     LOWEST OF RECORD, AND THE LOWEST SINCE 2017. AVERAGE IS 6.0
    MPH.
 SPRING (MAR-MAY)...PRECIPITATION OF 6.05 INCHES WAS THE SEVENTH
    HIGHEST OF RECORD AND WETTEST SINCE 1981. AVERAGE IS 3.44
INCHES.
       AVERAGE WIND SPEED OF 6.7 MPH WAS THE THIRD LOWEST OF
RECORD, AND THE LOWEST SINCE 1998. AVERAGE IS 8.0 MPH.
 FALL   (SEP-NOV)...AVERAGE WIND SPEED OF 5.6 MPH WAS THE SEVENTH
   LOWEST OF RECORD AND LOWEST SINCE 2013. AVERAGE IS 6.5 MPH.


LEWISTOWN... FEB...AVERAGE TEMPERATURE OF 10.5F WAS THE SECOND
COOLEST OF RECORD,       AND THE COOLEST SINCE 1989. AVERAGE IS
25.7F.
       PRECIPITATION OF 1.47 INCHES WAS THE SIXTH OF RECORD, AND
   HIGHEST SINCE 1979. AVERAGE IS 0.44 INCHES.
       SNOWFALL OF 33.1 INCHES WAS THE HIGHEST OF RECORD FOR
FEBRUARY, EXCEEDING THE OLD RECORD OF 29.5 INCHES SET IN 2007.
    AVERAGE IS 6.4 INCHES.
 MAR...AVERAGE WIND SPEED OF 8.1 MPH WAS THE EIGHTH LOWEST OF
RECORD,       AND THE LOWEST SINCE 1998. AVERAGE IS 9.5 MPH.
APR...SNOWFALL OF 21.3 INCHES WAS THE FIFTH HIGHEST OF RECORD, AND
     HIGHEST SINCE 2009. AVERAGE IS 4.6 INCHES.
 MAY...AVERAGE WIND SPEED OF 8.8 MPH WAS THE FOURTH LOWEST OF
RECORD,       AND THE LOWEST SINCE 2014. AVERAGE IS 9.4 MPH.  SPRING
(MAR-MAY)...AVERAGE WIND SPEED OF 8.1 MPH WAS THE FOURTH
CALMEST OF RECORD AND THE CALMEST SINCE 1983. AVERAGE IS 9.6
  MPH.
 BEFORE THE 101F IN AUGUST, THE LAST OCCURRENCE OF A 100F
TEMPERATURE       AT LEWISTOWN WAS IN AUGUST 2003.



                             NEW RECORD
TEMPERATURE WARM|       DAILY WIND        DAILY            HIGHS
LOWS LOWS| HIGH AVG LOW AVG  GUST   PRECIP BOZEMAN        2    2
2      1       11       3      4 CUT BANK       2    0    1      4
     2       4      5     DILLON         1    8    0      2        5
     12      4     GREAT FALLS    0    3    0      0       14
3      3     HAVRE          3    3    0      8        4       4
3 HELENA         2    3    1      1        8       5      2
LEWISTOWN      1    1    1      1        1       9      2 W
YELLOWSTONE  0    7    1                              4


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

2018... JANUARY... A STRONGER THAN NORMAL RIDGE OF HIGH PRESSURE WAS
OVER THE WEST COAST.
THIS BROUGHT BELOW NORMAL TEMPERATURES EAST AND ABOVE NORMAL WEST,
TO MONTANA. AFTER A COLD START, TEMPERATURES WARMED TO ABOVE NORMAL
THROUGH THE 9TH. SNOWFALL ACCOMPANIED ANOTHER COLD OUTBREAK FROM THE
10TH TO 12TH. THE BOZEMAN AREA PICKED UP FIVE TO TWELVE INCHES OF
SNOW. AFTER THE 15TH, IT WAS GENERALLY MILD FOR THE REMAINDER OF THE
MONTH. WEST YELLOWSTONE HAD THEIR WARMEST JANUARY SINCE 2003.

SNOW DURING THE MONTH HAS PRODUCED THE SNOWIEST WATER-YEAR TO DATE
AT BOZEMAN MSU. HAVRE HAS HAD THEIR FOURTH SUCH PERIOD.

          HIGH                       LOW TEMP      57F AT LITTLE
SNOWY RAWS   -37F NEAR RUDYARD       1ST                (17TH)

PRECIP    2.75 INCHES AT HEBGEN LAKE  AND 8.70" AT BLACK BEAR SNOTEL
WIND GUST   86 MPH NEAR BRADY          30TH
########

FEBRUARY... BELOW NORMAL TEMPERATURES DOMINATED DURING FEBRUARY AS A
BROAD TROUGH OF LOW PRESSURE WAS CENTERED OVER HUDSON BAY. THIS
BROUGHT A CONTINUED STREAM OF COLD AIR, WITH REGULAR STORMS DURING
THE FIRST 20 DAYS OF THE MONTH. HEAVIER THAN NORMAL SNOW FELL
CAUSING RECORDS TO FALL ACROSS MUCH OF NORTH CENTRAL MONTANA. THERE
WERE SEVERAL DAYS WITH BLIZZARD CONDITIONS ALONG THE ROCKY MOUNTIAN
FRONT CAUSING ROADS TO BE BLOCKED AND CLOSED FOR SEVERAL DAYS, NEAR
THE END OF THE MONTH. TEMPERATURES AVERAGED AS MUCH AS 20 DEGREES
BELOW NORMAL FOR FEBRUARY AT HAVRE. WIND CHILLS REACHED -68F NORTH
OF HINGHAM ON THE 10TH.

HAVRE`S HIGH TEMPERATURE OF 38F WAS THEIR COOLEST FEBRUARY MAXIMUM
SINCE 1969. CUT BANK AND HAVRE HAD THEIR WETTEST FEBRUARY OF RECORD.
THIS WAS CUT BANK AND HAVRE`S SNOWIEST FEBRUARY OF RECORD. EAST
GLACIER MEASURED 78-INCHES, THEIR SNOWIEST FEBRUARY OF RECORD.

WINDS AVERAGED NEAR TO ABOVE NORMAL. THE HIGHEST WIND GUST WAS 92
MPH AT DEEP CREEK RAWS, WHILE 76 MPH WAS REPORTED AT BROWNING.

          HIGH                      LOW TEMP      55F AT WHITEHALL
 2ND  -46F NORTH OF HAVRE     12TH PRECIP    5.99 INCHES AT EAST
GLACIER AND  9.30" AT MOUNT LOCKHART WIND GUST 92 MPH AT DEEP CREEK
RAWS  23RD
########

MARCH... WITH A NEAR NORMAL UPPER AIR PATTERN, MARCH HAD BELOW
NORMAL TEMPERATURES AND GENERALLY ABOVE NORMAL PRECIPITATION. MOST
AREAS HAD THEIR COOLEST MARCH SINCE 2002. THE AREA HIGH TEMPERATURE
OF 62F WAS THE COOLEST MARCH EXTREME SINCE 1975.

THE HEAVIEST PRECIPITATION FELL OVER THE ROCKIES AND CENTENNIAL
MOUNTAINS. AREAS FROM NEAR FAIRFIELD TO SWEET GRASS HAD MORE THAN
THREE TIMES THEIR NORMAL MARCH MOISTURE. FOR THE WATER-YEAR THROUGH
MARCH, HAVRE HAD THEIR SNOWIEST OF RECORD. BOZEMAN MSU, CUT BANK,
EAST GLACIER, AND GREAT FALLS WERE ALL AT SECOND SNOWIEST AT THIS
POINT.

          HIGH                      LOW TEMP      62F AT ROCKY BOY
13TH  -18F AT CHESTER         3RD PRECIP    2.53 INCHES AT NORRIS
MADISON, 6.60" AT LAKEVIEW RIDGE SNOT WIND GUST 87 MPH AT DEEP CREEK
RAWS  27TH AND 73 MPH AT TWO MEDICINE
########

APRIL... DURING APRIL, A WEAK RIDGE OF HIGH PRESSURE WAS CENTERED
OVER THE ROCKIES WHICH BROUGHT NORTHWEST FLOW ACROSS MONTANA. THIS
CONTRIBUTED TO BELOW NORMAL TEMPERATURES AND VARIABLE AMOUNTS OF
PRECIPITATION.

THE MONTH STARTED COLD, WITH LOWS AS COLD AS -15 ON THE THIRD. THE
COLD TEMPERATURES WERE THE COLDEST IN THE AREA IN APRIL SINCE 2008.
HEAVY SNOW BLANKETED THE AREA WITH SNOW FROM THE 6TH-8TH. HELENA
RECEIVED 8-INCHES OF SNOW. TEMPERATURES WARMED INTO THE 40S AND 50S
BY MID-MONTH. THIS BROUGHT FLOODING ACROSS NORTHERN MONTANA. ANOTHER
STORM SYSTEM MOVED THROUGH SOUTHERN MONTANA ON THE 23RD. UP TO 17-
INCHES OF SNOW WAS REPORTED OVER THE MOUNTAINS, WITH OVER ON-INCH OF
RAIN AT LOWER ELEVATIONS.

SPRING WAS DELAYED ACROSS THE REGION. HAVRE HAD THEIR LATEST FIRST
60F OF RECORD. THEY REACHED 60F ON APRIL 20, ONE DAY LATER THAN THE
PREVIOUS LATE RECORD OF APRIL 19, 1975. THEY HAD THEIR 8TH COOLEST
APRIL OF RECORD. THE FIRST 70F IN THE AREA WAS AT GRASS RANGE ON THE
21ST. THIS IS THE LATEST SINCE 2011 AND A MONTH LATER THAN NORMAL.

SOME AREAS OF THE HI-LINE HAD BELOW NORMAL APRIL PRECIPITATION.
MEANWHILE, BOZEMAN TIED 2003 FOR THEIR WETTEST OF RECORD. BOZEMAN
MSU ALSO HAD A RECORD AMOUNT FOR THE MONTH. SNOWFALL WAS ABOVE
AVERAGE. FOR THE WATER-YEAR, MANY LOCATIONS WERE STILL RUNNING THEIR
SNOWIEST OF RECORD, THROUGH APRIL.

          HIGH                         LOW TEMP      87F AT GREAT
FALLS 28TH    -15F AT CARTER & RUDYARD  3RD PRECIP    4.37 INCHES AT
BOZEMAN MSU  9.20" AT BRACKETT CK  SNOTEL WIND GUST 75 MPH AT DEEP
CREEK RAWS  21ST
########

MAY... UPPER LEVEL FLOW WAS GENERALLY FROM THE NORTHWEST FOR THE
MONTH. TEMPERATURES AVERAGED ABOVE NORMAL WITH MOSTLY ABOVE NORMAL
PRECIPITATION. THE MONTH STARTED WITH QUIET WEATHER CONDITIONS. SOME
THUNDERSTORMS MOVED ACROSS THE SOUTHWEST ON THE 5TH, PRODUCING GUSTS
TO 61 MPH IN BEAVERHEAD COUNTY. ANOTHER ROUND OF THUNDERSTORMS WITH
HEAVY RAIN MOVED THROUGH FROM THE 9TH-12TH. A SMALL TORNADO WAS SEEN
NEAR MOORE ON THE 9TH. RAIN AMOUNTS OVER 1.5-INCHES FELL FROM THE
ROCKIES TO LITTLE BELTS. WARMER TEMPERATURES WITH THUNDERSTORMS
OCCURRED ON THE 16TH. A WIND GUST OF 79 MPH WAS REPORTED AT THE
HILLDALE COLONY NORTHWEST OF HAVRE. WITH THE WARMER TEMPERATURES,
RIVER FLOODING FROM MELTING MOUNTAIN SNOW DOMINATED THE LATTER HALF
OF THE MONTH.

IT WAS THE WARMEST MAY SINCE 1958 AT CUT BANK AND GREAT FALLS, AND
SINCE 1985 AT BOZEMAN AND LEWISTOWN.

          HIGH                        LOW TEMP      87F AT SEVERAL
SPOTS 26TH  17F AT YELLOW MULE RAWS  2ND PRECIP    5.10 INCHES AT
LEWISTOWN; 7.30 INCHES AT DEADMAN CK SNOT WIND GUST 79 MPH AT
HILLDALE COLONY  16TH
########

JUNE... THE WEATHER WAS VERY ACTIVE IN JUNE. TEMPERATURES AVERAGED
NEAR NORMAL. JUNE STARTED OUT WITH COLD TEMPERATURES, WITH SOME
LINGERING HEAVY RAIN FROM MAY. ANOTHER AREA OF HEAVY RAIN FELL ON
THE 8TH. OVER TWO-INCHES OF RAIN FELL FROM BOZEMAN TO LEWISTOWN TO
THE BEARS PAWS. RECORD HIGH TEMPERATURES OCCURRED ON THE 9TH, WITH
SHARPLY COLDER AIR THE NEXT DAY. WITH TEMPERATURES IN THE 60S AT
LOWER ELEVATIONS, SNOW FELL OVER THE MOUNTAINS ON THE 10TH AND 11TH.
ANOTHER PERIOD OF HEAVY RAIN OCCURRED FROM THE 15TH-19TH. NINE
INCHES OF RAIN FELL AT WOOD CREEK SNOTEL, WHILE 7.5 INCHES FELL AT
GIBSON DAM. RESULTANT FLOODING OCCURRED OVER MANY RIVERS IN CENTRAL
MONTANA. SOME STAGES WERE HIGHER THAN FROM THE SNOWMELT IN MAY, AND
HIGHER THAN SEEN IN 2011. ALL ROADS TO AUGUSTA WERE CLOSED FOR A
TIME. HIGHWAY 200 WAS REOPENED ON THE 22ND AFTER A WASHED-OUT
CULVERT WAS REPAIRED. ON THE 23RD, TORRENTIAL RAINS CAUSED FLOODING
IN THE SHELBY AND NORTH OF GREAT FALLS AREAS. OVER 4.5 INCHES OF
RAIN FELL IN 2.5 HOURS NORTH OF GREAT FALLS, WITH OVER 3-INCHES IN
ONLY 15 MINUTES. A SMALL TORNADO WAS ALSO SEEN THIS DAY NEAR
HIGHWOOD. ON THE 25TH, A MICROBURST CAUSED SIGNIFICANT DAMAGE TO
FARMS EAST OF FAIRFIELD.

          HIGH                      LOW TEMP      96F AT GREAT FALLS
 9TH   20F AT RED ROCK RAWS  12TH PRECIP    7.66 INCHES NEAR
LEWISTOWN 10.00" AT WOOD CREEK SNOTEL  WIND GUST  70 MPH AT DEEP
CREEK (12TH) AND BROWNING (10TH)
########

JULY... JULY AVERAGED NEAR NORMAL TEMPERATURES, BUT DRY. THERE WERE
SEVERAL ROUNDS OF SEVERE WEATHER, INCLUDING SNOW AT HIGHER
ELEVATIONS ON THE 3RD. UP TO 4 INCHES FELL. OTHERWISE THERE WERE
SCATTERED THUNDERSTORMS THROUGHOUT THE MONTH.

THE HELENA VALLEY WAS DRY. RECEIVING ONLY 0.01", THIS WAS THE DRIEST
JULY OF RECORD AT HELENA. DILLON HAD THEIR SECOND DRIEST, WITH ONLY
A TRACE.

          HIGH                      LOW TEMP     103F AT HAVRE
10TH       24F AT ELK PARK AND GATES PARK              CHINOOK AND
LOMA 6TH         4TH PRECIP    2.20 INCHES NEAR TURNER

WIND GUST 69 MPH NEAR BOZEMAN  10TH
########

AUGUST... A RIDGE OF HIGH PRESSURE WAS OVER THE ROCKIES DURING
AUGUST. TEMPERATURES WERE NEAR NORMAL, WITH MOSTLY BELOW NORMAL
PRECIPITATION. THUNDERSTORMS PRODUCED AN AREA OF ABOVE NORMAL
PRECIPITATION FROM NEAR BIG SKY TO MARTINSDALE. TEMPERATURES STARTED
OUT VERY WARM, PEAKING BY THE 11TH ACROSS THE AREA. SOME AREAS HAD
THEIR HIGHEST AUGUST TEMPERATURE IN SEVERAL YEARS. TEMPERATURES
REMAINED ABOVE NORMAL THROUGH THE 19TH, THEN FALLING TO NEAR TO
BELOW NORMAL FOR THE REST OF THE MONTH. A SMALL TORNADO RESULTED
FROM THUNDERSTORMS NEAR WISDOM ON THE 20TH.

HIGH                                LOW TEMP     108F AT ARMELLS CK
11TH   20F AT GATES PARK   28TH PRECIP   2.34 INCHES NORRIS MADISON
   3.00" AT LONE MOUNTAIN.
WIND GUST  78 MPH NEAR WISDOM     20TH
########

SEPTEMBER... THE WESTERLY FLOW ALOFT CONTINUED IN SEPTEMBER.
TEMPERATURES WERE TWO TO FOUR DEGREES BELOW NORMAL. PRECIPITATION
WAS ABOVE NORMAL NORTH AND BELOW NORMAL ELSEWHERE. ALTHOUGH
TEMPERATURES AVERAGED BELOW NORMAL, SEPTEMPBER`S WEATHER WAS FAIRLY
TYPICAL. ISOLATED THUNDERSTORMS OCCURRED THROUGHOUT THE MONTH.
THUNDERSTORMS PRODUCED WIND GUSTS TO 66 MPH IN THE ELKHORNS ON THE
6TH. ON THE 7TH, ANOTHER ROUND OF THUNDERSTORMS PRODUCED WINDS TO 63
MPH IN THE FRESNO RESERVOIR AREA. TWO LARGER STORM SYSTEMS MOVED
THROUGH THE AREA FROM THE 12TH-20TH. THESE PRODUCED UP TO TWO INCHES
OF RAIN ACROSS NORTH CENTRAL MONTANA. SOME SNOW FELL ACROSS THE AREA
ON THE 29TH AND 30TH. CUT BANK`S HIGH TEMPERATURE OF 32F ON THE 30TH
WAS THEIR COOLEST HIGH TEMPERATURE IN SEPTEMBER SINCE 2000. THEY HAD
THEIR COOLEST SEPTEMBER SINCE 1993.
PRECIPITATION AMOUNTS WERE HIGHEST OVER BLAINE COUNTY AND WINDS
AVERAGED LIGHTER THAN NORMAL. GREAT FALLS HAD THEIR SECOND CALMEST
SEPTEMBER OF RECORD AND CALMEST SINCE 1950.

          HIGH                     LOW TEMP      93F AT LOMA  7TH
     14F AT GATES PARK    24TH          PRECIP    2.96 INCHES NEAR
HARLEM                                  WIND GUST  66 MPH ELKHORNS
6TH
########

OCTOBER... WESTERLY FLOW ALOFT CONTINUED IN OCTOBER. THIS PATTERN
PRODUCED SLIGHTLY NEAR TO SLIGHTLY BELOW NORMAL TEMPERATURES AND
VARIABLE AMOUNTS OF PRECIPITATION. THE FIRST HALF OF THE MONTH WAS
GENERALLY COOL, WITH PERIODS OF PRECIPITATION, OFTEN SNOW. EAST
GLACIER MEASURED OVER 20 INCHES DURING THIS PERIOD. AFTER MIN-MONTH,
TEMPERATURES AVERAGED NEAR NORMAL.

          HIGH                      LOW TEMP      83F AT LOMA
21ST    5F AT YELLOW MULE  14TH   PRECIP    5.40 INCHES AT MANY
GLACIER        WIND GUST  81 MPH AT DEEP CREEK RAWS  12TH
########

NOVEMBER... DURING NOVEMBER, A UPPER LEVEL FLOW WAS FROM THE
NORTHWEST, PRODUCING A MIXTURE OF BELOW TO ABOVE NORMAL
TEMPERATURES. PRECIPITATION AMOUNTS WERE MOSTLY ABOVE NORMAL AND
WINDS AVERAGED BELOW NORMAL. LIGHT PRECIPITATION AMOUNTS FELL FOR
THE FIRST FEW DAYS. A COLDER PERIOD, WITH LOWS DROPPING BELOW ZERO
ALSO BROUGHT A CHANGE TO SNOW. TEMPERATURES RETURNED TO ABOVE
NORMAL, ALONG WITH INCREASED WINDS BY THE 14TH. A QUICKLY MOVING
STORM BROUGHT SNOW TO THE AREA ON THE 16TH, WITH TEMPERATURES THEN
RETURNING TO ABOVE NORMAL FOR MOST OF THE REST OF THE MONTH. CHOTEAU
TIED A RECORD HIGH TEMPERATURE OF 65F ON THE 21ST.
ABOVE NORMAL TEMPERATURES AND BELOW NORMAL PRECIPITATION. NEARLY ALL
DAYS OF THE MONTH AVERAGED ABOVE NORMAL. SEVERAL LOCATIONS HAD THEIR
WARMEST NOVEMBER SINCE 1954. HELENA SET AN ALL-TIME HIGH MONTHLY
AVERAGE, EXCEEDING THEIR OLD RECORD SET IN 1904.

PRECIPITATION WAS LIGHT. HAVRE HAD ONLY A TRACE, WHILE HELENA
MEASURED 0.02". THIS WAS THE SECOND DRIEST NOVEMBER OF RECORD AT
THESE LOCATIONS. THE WETTEST SPOT WAS MANY GLACIER WITH 4.30 INCHES.
SNOWFALL WAS GENERALLY LIGHT AS WELL. HOWEVER, CUT BANK PICKED UP 6-
INCHES, ONE-INCH ABOVE THEIR MONTHLY NORMAL.
WINDS WERE LOWER THAN NORMAL. THIS WAS THE CALMEST NOVEMBER OF
RECORD AT DILLON, AND THE LOWEST AREA AVERAGE WIND SPEED SINCE 1982.

          HIGH                        LOW TEMP      65F AT CHOTEAU
21ST       -20F AT ELK PARK   12TH                 STANFORD PRECIP
 8.10 INCHES AT SACAJAWEA SNOTEL  2.10" NEAR BOZEMAN WIND GUST  87
MPH AT DEEP CREEK RAWS 2ND
########

DECEMBER... TEMPERATURES AVERAGED MOSTLY ABOVE NORMAL FOR THE MONTH.
THERE WAS A SMALL AREA IN SOUTHWEST MONTANA WITH SLIGHTLY BELOW
NORMAL TEMPERATURES. PRECIPITATION WAS MOSTLY BELOW NORMAL, EXCEPT
FOR AN AREA FROM CHOTEAU NORTH TO THE BORDER WITH ABOVE NORMAL
PRECIPITATION. WINDS AVERAGED ABOVE NORMAL DUE TO A VERY WINDY
PERIOD FROM THE 11TH THROUGH 22ND AND AGAIN ON THE 29TH.

          HIGH                      LOW TEMP      60F AT FORT
BELKNAP 15TH -29F AT WHISKEY CREEK 6TH PRECIP  4.90 INCHES AT BADGER
PASS SNOTEL  1.86"IN AT ST MARY" WIND GUST 102 MPH AT DEEP CREEK
29TH

$$
&&

NNNN


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