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Issued by NWS Great Falls, MT

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Point Forecast Matrices
National Weather Service Great Falls MT
318 PM MST Wed Dec 13 2017

MTZ012-141100-
Great Falls-Cascade MT
47.47N 111.38W Elev. 3663 ft
318 PM MST Wed Dec 13 2017

Date          Wed 12/13/17      Thu 12/14/17            Fri 12/15/17         Sat
MST 3hrly     14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05
UTC 3hrly     21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12

Min/Max                      24          37          32          49          27
Temp             34 31 28 28 26 25 32 37 32 32 32 33 36 40 47 48 44 39 33 31 27
Dewpt            26 24 22 22 20 19 21 22 20 19 19 19 20 19 22 22 25 26 27 25 22
RH               72 75 78 78 78 78 63 54 61 58 58 56 52 42 37 35 47 59 78 78 81
Wind dir          W  W  W  W  W SW SW SW SW SW SW SW SW SW SW SW SW NW  W  W  W
Wind spd          8  9  9  8  6  6  9 12 11 13 16 17 18 19 23 20 24 14 14 10 12
Wind gust                                                  34
Clouds           SC SC FW FW SC FW FW CL SC SC SC SC FW B1 B2 B2 OV OV B2 B2 B2
PoP 12hr                     10           0           0          20          50
QPF 12hr                      0           0           0           0        0.13
Snow 12hr                 00-00       00-00       00-00
Rain                                                        S  S  C  C
Snow                                                                 C  C  C  C


Date           12/16/17  Sun 12/17/17  Mon 12/18/17  Tue 12/19/17  Wed 12/20/17
MST 6hrly     11 17 23   05 11 17 23   05 11 17 23   05 11 17 23   05 11 17
UTC 6hrly     18 00 06   12 18 00 06   12 18 00 06   12 18 00 06   12 18 00

Max/Min          36      23    41      29    43      29    42      29    41
Temp          34 33 24   26 37 41 32   31 43 39 33   30 39 42 39   29 41 33
Dewpt         23 21 16   17 19 22 20   21 25 23 24   22 25 26 26   22 23 15
PWind dir         W      SW    SW      SW    SW       W    SW       S    SW
Wind char        BZ      BZ    BZ      BZ    BZ      BZ    GN      GN    BZ
Avg clouds    B2 B1 SC   FW SC SC B1   B1 B2 B1 B2   B2 B2 B2 B2   OV OV B2
PoP 12hr         40       5     5      20    20      20    30      30    30
Rain                                          S  S             C
Snow           C  S                     S  S  S  S    S  C  C  C    C  C  C

$$
MTZ010-141100-
Cut Bank-Glacier MT
48.60N 112.39W Elev. 3838 ft
318 PM MST Wed Dec 13 2017

Date          Wed 12/13/17      Thu 12/14/17            Fri 12/15/17         Sat
MST 3hrly     14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05
UTC 3hrly     21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12

Min/Max                      23          39          29          45          25
Temp             33 29 28 28 25 24 32 39 31 30 32 35 37 39 42 45 38 33 30 28 25
Dewpt            22 22 22 22 21 19 21 21 20 20 20 21 20 18 18 18 25 27 25 22 21
RH               63 75 78 78 84 81 63 48 63 66 61 56 50 42 37 33 59 78 81 78 84
Wind dir         NW NW NW NW  W  W SW  W SW  W  W  W  W  W  W  W NW NW  W  W  W
Wind spd          9 10  9  9  6  5  9 11 11 13 17 19 20 20 20 18 17 16 14 14 13
Wind gust                 19                      31 36 35 34 29
Clouds           SC FW FW FW FW SC FW FW FW SC SC FW SC B2 B2 B2 OV B2 B2 B2 B2
PoP 12hr                      5           0           0          30          50
QPF 12hr                      0           0           0           0        0.11
Snow 12hr                 00-00       00-00       00-00
Rain                                                        C  C
Snow                                                           C  C  C  C  C  C


Date           12/16/17  Sun 12/17/17  Mon 12/18/17  Tue 12/19/17  Wed 12/20/17
MST 6hrly     11 17 23   05 11 17 23   05 11 17 23   05 11 17 23   05 11 17
UTC 6hrly     18 00 06   12 18 00 06   12 18 00 06   12 18 00 06   12 18 00

Max/Min          36      23    40      27    39      24    38      24    36
Temp          32 27 23   27 39 36 34   27 39 30 28   25 38 27 30   24 36 26
Dewpt         20 19 14   18 23 23 26   22 26 20 23   20 28 23 23   18 26 14
PWind dir         W       W     W       W     W       W     W       S     W
Wind char        BZ      BZ    BZ      BZ    BZ      BZ    GN      GN    BZ
Avg clouds    B1 SC SC   FW B1 B1 B1   B1 B1 B1 B1   B2 B2 B2 B2   OV B2 B2
PoP 12hr         30       5     5      10    20      20    30      40    30
Snow           C                           S          S  S  C  C    C  C  C

$$
MTZ014-141100-
Helena-Lewis & Clark MT
46.61N 111.96W Elev. 3893 ft
318 PM MST Wed Dec 13 2017

Date          Wed 12/13/17      Thu 12/14/17            Fri 12/15/17         Sat
MST 3hrly     14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05
UTC 3hrly     21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12

Min/Max                      10          27           9          37          23
Temp             31 24 18 17 13 10 20 27 21 15 11 10  9 13 26 37 35 31 29 26 25
Dewpt            19 19 14 12 12  8 15 17 13 11  6  6  4  8 17 23 23 24 23 21 21
RH               61 81 84 80 96 91 81 65 71 84 80 83 80 80 68 56 61 75 78 81 84
Wind dir         SW  W NW  W  W  E  E  E  S SE  S  S  S SE SE  S SW  W  W  W  W
Wind spd          3  3  3  4  2  3  3  6  3  3  3  4  5  4  4  5  6  8  5  6  6
Clouds           SC SC SC FW FW SC FW FW FW SC SC SC SC SC SC SC B2 B2 B2 B2 B2
PoP 12hr                     20           0           0           5          40
QPF 12hr                      0           0           0           0        0.04
Snow 12hr                 00-00       00-00       00-00
Rain                                                              C
Snow              S                                                  C  C  C  C
Obvis                        PF PF
Wind chill                                           -1
Min chill                                            -1
Winter Weath      Y


Date           12/16/17  Sun 12/17/17  Mon 12/18/17  Tue 12/19/17  Wed 12/20/17
MST 6hrly     11 17 23   05 11 17 23   05 11 17 23   05 11 17 23   05 11 17
UTC 6hrly     18 00 06   12 18 00 06   12 18 00 06   12 18 00 06   12 18 00

Max/Min          33      18    33      23    38      24    38      24    37
Temp          32 28 20   19 27 33 27   24 35 37 29   24 33 38 30   24 28 36
Dewpt         22 15 14   14 15 18 20   20 23 21 22   19 22 24 23   20 17 20
PWind dir         W      SW    SW      SW    SW      SW    SW      SW    SW
Wind char        LT      LT    LT      LT    LT      LT    LT      LT    LT
Avg clouds    B2 B1 B1   FW SC B1 B1   B1 B2 B1 B2   B2 B2 B2 B2   B2 B2 B2
PoP 12hr         30       5     5      10    10      20    30      30    30
Rain                                             S          S  S
Snow           C  C                              S    S  C  S  S    C  C  C

$$
MTZ055-141100-
Bozeman-Gallatin MT
45.78N 111.16W Elev. 4475 ft
318 PM MST Wed Dec 13 2017

Date          Wed 12/13/17      Thu 12/14/17            Fri 12/15/17         Sat
MST 3hrly     14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05
UTC 3hrly     21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12

Min/Max                       8          23           6          33          20
Temp             26 17 17 13 10  8 19 23 19 10  9  7  7  7 24 33 29 26 25 24 21
Dewpt            24 14 13 11  8  7 14 15 12  5  3  2  3  2 15 21 19 19 19 20 17
RH               92 88 84 91 91 96 80 71 74 80 76 79 83 79 68 61 66 74 78 84 84
Wind dir          E  S SW  S SE SW NW  N  W  S  S SW SE SE SE  W SW SW SW SW  W
Wind spd          2  2  2  2  2  1  1  1  2  2  2  3  2  2  2  3  5  5  4  5  5
Clouds           B2 B2 B2 B1 B1 B1 SC SC SC SC SC FW FW SC SC SC B2 B2 OV B2 B2
PoP 12hr                     70          10           0           0          50
QPF 12hr                   0.02           0           0           0        0.07
Snow 12hr                     T       00-00       00-00
Frzg drzl            C
Snow              L     S  S                                      C  C  C  C  C
Obvis            PF       PF PF PF
Winter Weath      Y


Date           12/16/17  Sun 12/17/17  Mon 12/18/17  Tue 12/19/17  Wed 12/20/17
MST 6hrly     11 17 23   05 11 17 23   05 11 17 23   05 11 17 23   05 11 17
UTC 6hrly     18 00 06   12 18 00 06   12 18 00 06   12 18 00 06   12 18 00

Max/Min          30       9    28      16    34      19    35      20    35
Temp          27 26 15    9 22 28 18   18 30 33 23   20 29 35 25   21 33 31
Dewpt         19 18  8    6 10 16 10   13 18 19 15   15 17 23 16   16 21 18
PWind dir         W      SW    SW      SW    SW      SW    SW      SW    SW
Wind char        LT      LT    LT      LT    LT      LT    LT      LT    LT
Avg clouds    B2 B2 B1   SC SC B1 B1   B1 B2 B2 B2   B2 B2 B2 B2   B1 B2 B2
PoP 12hr         40      10    10      20    20      30    30      30    30
Rain                                                        C  C          C
Snow           C  C                     S  S  S  C    C  C  C  C    C  C  C

$$
MTZ055-141100-
West Yellowstone-Gallatin MT
44.66N 111.11W Elev. 6700 ft
318 PM MST Wed Dec 13 2017

Date          Wed 12/13/17      Thu 12/14/17            Fri 12/15/17         Sat
MST 3hrly     14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05
UTC 3hrly     21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12

Min/Max                      -2          21          -3          23          13
Temp             23 16 10  3 -1  0 13 21 17  7  3 -1 -3  0 13 23 20 17 17 14 14
Dewpt            22 10  8  2 -3 -1  9 10 11  3  0 -4 -5 -1  9 14 15 12 13 12 12
RH               96 77 91 95 91 95 84 62 77 83 87 87 91 95 84 68 81 80 84 92 92
Wind dir          S  S SE SE  S SE  S NW  W  S  E SE SE SE  S  S  S  S SW SW SW
Wind spd          1  2  3  3  2  2  1  2  2  1  1  1  1  2  6  8  5  3  5  6  4
Clouds           B2 SC SC FW FW FW FW CL FW FW SC SC SC SC SC SC B2 B2 OV B2 B2
PoP 12hr                     50           0           5           5          50
QPF 12hr                   0.01           0           0           0        0.09
Snow 12hr                     T       00-00       00-00
Snow              C  S                                            C  C  C  C  C
Obvis            PF          PF PF                PF PF PF
Wind chill                -4
Min chill                    -8    -2                -3    -3
Winter Weath      Y


Date           12/16/17  Sun 12/17/17  Mon 12/18/17  Tue 12/19/17  Wed 12/20/17
MST 6hrly     11 17 23   05 11 17 23   05 11 17 23   05 11 17 23   05 11 17
UTC 6hrly     18 00 06   12 18 00 06   12 18 00 06   12 18 00 06   12 18 00

Max/Min          24       1    19       5    24      11    26      13    28
Temp          19 20  7    1 12 19  6    9 16 24 16   11 20 26 16   14 24 27
Dewpt         14 13  4   -1  3 10  2    7 11 16 14    9 16 17 13   12 18 18
PWind dir         W      SE     S      SW    SW      SW    SW      SW    SW
Wind char        LT      LT    LT      LT    LT      LT    LT      LT    LT
Avg clouds    B2 B2 B1   SC SC B1 B1   B2 B2 B2 B2   B2 B2 B2 B2   B1 B2 B2
PoP 12hr         40      10     5      20    20      30    30      30    20
Snow           C  C                     S  S  S  C    C  C  C  C    S  S  S

$$
MTZ008-141100-
Dillon-Beaverhead MT
45.26N 112.55W Elev. 5357 ft
318 PM MST Wed Dec 13 2017

Date          Wed 12/13/17      Thu 12/14/17            Fri 12/15/17         Sat
MST 3hrly     14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05
UTC 3hrly     21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12

Min/Max                       7          22           8          34          20
Temp             29 22 16 12  9  7 16 22 17 12 11  9 10  9 24 34 29 25 25 21 22
Dewpt            24 17 12  9  6  4 11 13  9  5  3  2  3  3 15 23 20 17 19 16 16
RH               81 81 84 87 87 87 80 68 70 73 69 72 73 76 68 64 69 71 78 81 77
Wind dir          S  S  S  S  S  S SW  W SE  S  S  S  S  S  S  S  S  S SW SW  W
Wind spd          2  4  5  5  5  4  1  1  2  5  5  5  8  8  6  5 10 10 10  9 10
Clouds           B2 B1 SC SC SC SC FW FW SC FW SC SC FW FW SC SC B2 B2 B2 B1 B1
PoP 12hr                     60           0           0           0          30
QPF 12hr                   0.01           0           0           0        0.04
Snow 12hr                     T       00-00       00-00
Snow              L  S                                            C  C  C  C  S
Obvis            PF
Wind chill                   -1 -2                -1 -2 -3
Min chill                    -1    -3                -2    -4
Winter Weath      Y


Date           12/16/17  Sun 12/17/17  Mon 12/18/17  Tue 12/19/17  Wed 12/20/17
MST 6hrly     11 17 23   05 11 17 23   05 11 17 23   05 11 17 23   05 11 17
UTC 6hrly     18 00 06   12 18 00 06   12 18 00 06   12 18 00 06   12 18 00

Max/Min          31      11    29      18    36      19    35      21    37
Temp          29 23 13   12 23 29 20   20 34 33 23   20 32 33 23   23 35 32
Dewpt         17 11  5    6  8 13 10   13 17 17 14   14 19 17 14   16 20 16
PWind dir         W       W    SW       S     S       S     S       S     S
Wind char        GN      GN    GN      GN    GN      GN    GN      GN    GN
Avg clouds    B1 B1 B1   SC SC B1 B1   B1 B1 B1 B1   B1 B2 B1 B1   B1 B1 B2
PoP 12hr         20       5     5      10    10      10    10      20    20
Snow           S  S                                                 S  S  S

$$
MTZ011-141100-
Havre-Hill MT
48.54N 109.76W Elev. 2585 ft
318 PM MST Wed Dec 13 2017

Date          Wed 12/13/17      Thu 12/14/17            Fri 12/15/17         Sat
MST 3hrly     14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05
UTC 3hrly     21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12

Min/Max                      24          36          26          48          26
Temp             38 34 29 27 26 24 31 36 31 28 27 27 27 29 42 48 39 33 30 29 27
Dewpt            27 26 24 24 22 21 26 24 24 21 20 20 18 20 21 22 29 28 27 24 22
RH               64 72 81 88 85 88 81 61 75 75 74 74 68 69 43 35 67 82 88 81 81
Wind dir          W  W  W  W  W  W SW SW SW SW SW SW SW SW SW  W NW  W  W  W  W
Wind spd          9  9  9 10 11 10 10 10  5  8 13 14 14 14 18 18 12 12 11 12 13
Wind gust                                                  31 29
Clouds           SC FW FW SC SC SC SC FW FW B1 B1 SC FW SC B1 B2 OV OV B2 B2 B2
PoP 12hr                     10           0           0          50          50
QPF 12hr                      0           0           0        0.02        0.07
Snow 12hr                 00-00       00-00       00-00
Rain                                                        C  C  C  C
Snow                                                                 C  C  C  S


Date           12/16/17  Sun 12/17/17  Mon 12/18/17  Tue 12/19/17  Wed 12/20/17
MST 6hrly     11 17 23   05 11 17 23   05 11 17 23   05 11 17 23   05 11 17
UTC 6hrly     18 00 06   12 18 00 06   12 18 00 06   12 18 00 06   12 18 00

Max/Min          38      21    41      25    41      22    39      23    39
Temp          34 31 22   24 39 39 31   26 40 36 23   25 37 36 26   25 38 29
Dewpt         26 21 16   16 21 24 25   22 27 25 18   19 24 25 22   20 25 22
PWind dir         W       W    SW       W     W       W    SW      SE    SE
Wind char        BZ      GN    GN      GN    GN      GN    GN      GN    GN
Avg clouds    B1 B1 SC   SC SC B1 B1   B2 B2 B1 B1   B1 B2 B2 B2   OV OV B2
PoP 12hr         20       5     5      20    20      10    20      30    30
Rain                               S
Snow           S  S                S    S  S  S          S  S  S    C  C  C

$$
MTZ051-141100-
Lewistown-Fergus MT
47.05N 109.46W Elev. 4144 ft
318 PM MST Wed Dec 13 2017

Date          Wed 12/13/17      Thu 12/14/17            Fri 12/15/17         Sat
MST 3hrly     14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05
UTC 3hrly     21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12

Min/Max                      24          36          26          50          25
Temp             35 32 30 29 26 24 30 36 32 28 27 30 32 36 47 50 44 37 33 29 26
Dewpt            26 26 23 24 21 21 25 24 20 13 15 16 18 17 17 22 21 27 30 27 24
RH               69 78 75 81 81 88 81 61 61 53 60 55 56 45 30 33 39 67 89 92 92
Wind dir          W  W  W  W  W  W  W  W  S  S SW SW SW SW  W  W  W NW NW NW NW
Wind spd          6 10 12 13 12  8  8  6  5  4  8  6  9 10 10 10 17 11 10 11 11
Wind gust                 24 25                            28 27 31
Clouds           B1 SC SC SC SC SC FW FW FW SC SC SC SC SC SC B1 B2 B2 OV B2 B2
PoP 12hr                     20           5           0           5          50
QPF 12hr                      0           0           0           0        0.13
Snow 12hr                 00-00       00-00       00-00
Rain                                                              C  C
Snow              S                                                  C  C  C  C


Date           12/16/17  Sun 12/17/17  Mon 12/18/17  Tue 12/19/17  Wed 12/20/17
MST 6hrly     11 17 23   05 11 17 23   05 11 17 23   05 11 17 23   05 11 17
UTC 6hrly     18 00 06   12 18 00 06   12 18 00 06   12 18 00 06   12 18 00

Max/Min          32      19    39      26    38      24    38      25    38
Temp          27 29 20   22 37 37 32   26 38 34 26   26 37 35 27   26 37 32
Dewpt         21 21 15   16 17 22 21   20 23 22 22   21 27 23 23   20 24 15
PWind dir        NW       W    SW       W     W       W     W      SW     W
Wind char        GN      GN    GN      GN    GN      GN    GN      GN    GN
Avg clouds    B2 B1 B1   SC SC SC SC   B1 B1 B2 B1   B2 B2 B2 B2   OV OV B2
PoP 12hr         40      10     5      10    30      20    30      40    30
Snow           C  S                        C  C  S    S  C  C  C    C  C  C

$$
http://www.weather.gov/greatfalls




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