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Issued by NWS Great Falls, MT

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Point Forecast Matrices
National Weather Service Great Falls MT
806 PM MST Mon Jan 20 2025

MTZ312-211100-
Great Falls-Cascade MT
47.47N 111.38W Elev. 3663 ft
806 PM MST Mon Jan 20 2025

Date          Mon 01/20/25      Tue 01/21/25            Wed 01/22/25         Thu
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                      15          34          20          32          10
Temp                   19 22 24 28 31 32 29 24 24 24 22 23 29 32 26 19 15 15 14
Dewpt                  10  8  8 12 13 15 16 12 12 13 12 13 16 17 15 11  7  7  5
RH                     67 54 50 50 47 49 58 60 60 62 65 65 58 53 62 70 70 70 67
Wind dir               SW SW SW SW SW  W  W  W  W  W  W  W  W  W  W SW SW SW SW
Wind spd               28 29 28 33 23 20 16 18 18 18 17 14 13 13  9 10 10 12 14
Wind gust                    40    35 31
Clouds                 B1 B1 B2 OV B2 OV B2 SC SC OV OV B2 B2 SC FW FW FW FW SC
PoP 12hr                      0          20          30          20           0
QPF 12hr                      0           0           0           0           0
Snow 12hr                 00-00       00-00       00-00
Snow                             S     S  S  S  C  C  S  S
Wind chill                                                                   -2
Min chill              -3                                                    -2


Date           01/23/25  Fri 01/24/25  Sat 01/25/25  Sun 01/26/25  Mon 01/27/25
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          37      23    28      11    20       1    23      12    32
Temp          30 34 30   24 27 24 19   15 18 16  8    3 17 21 16   16 26 30
Dewpt         15 21 25   20 22 19 14   10 11 10  1   -5  6 11  7    6 14 19
PWind dir        SW       W    NW      NW    NW      SW    SW      SW    SW
Wind char        BZ      GN    GN      GN    GN      GN    GN      GN    BZ
Avg clouds    SC B2 OV   OV OV B2 B2   B2 B2 B1 SC   SC SC SC SC   SC SC FW
PoP 12hr         10      90    70      40    20       5     5       0     0
Snow                 L    D  L  C  C    C  S  S

$$
MTZ303-211100-
Cut Bank-Glacier MT
48.60N 112.39W Elev. 3838 ft
806 PM MST Mon Jan 20 2025

Date          Mon 01/20/25      Tue 01/21/25            Wed 01/22/25         Thu
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                      17          28          16          27          11
Temp                   22 25 26 24 28 28 24 21 22 21 19 18 24 27 21 16 14 15 16
Dewpt                  12 11 14 13 14 14 12 11 12 12 12 11 15 16 14  9  7  8  8
RH                     65 55 60 62 55 55 60 65 65 68 74 73 68 63 74 73 73 73 70
Wind dir                W  W  W  W  W  W  W  W  W  W  W  W  W  W  W  W  W  W  W
Wind spd               37 36 37 40 37 31 26 26 23 20 19 18 18 17 13 16 16 17 18
Wind gust              51 49 48    56 46 40 40 35 32                      27
Clouds                 B1 B2 B2 B2 B1 B1 FW FW B1 B2 B2 B2 SC FW FW FW FW SC SC
PoP 12hr                     10          20           5           5           0
QPF 12hr                      0           0           0           0           0
Snow 12hr                 00-00       00-00       00-00
Snow                          S
Wind chill                                                             -1 -1 -2
Min chill              -3                                              -2    -2
High Wind               W  W  W  W  W  W


Date           01/23/25  Fri 01/24/25  Sat 01/25/25  Sun 01/26/25  Mon 01/27/25
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      19    26       7    19       2    26      14    33
Temp          28 30 26   20 23 20 15   11 15 14  9    4 18 23 19   18 27 29
Dewpt         17 20 22   17 17 15 11    7  9  8  2   -4 10 14 11    9 16 19
PWind dir         W       W    NW      NW    NW       W     W       W     W
Wind char        WY      BZ    BZ      BZ    GN      GN    BZ      BZ    BZ
Avg clouds    B1 B2 OV   B2 B2 B1 B1   B2 B1 B1 SC   SC SC SC SC   SC SC SC
PoP 12hr          5      70    30      20     5       0     0       0     0
Snow                 L    L  C     S

$$
MTZ319-211100-
Helena-Lewis & Clark MT
46.61N 111.96W Elev. 3893 ft
806 PM MST Mon Jan 20 2025

Date          Mon 01/20/25      Tue 01/21/25            Wed 01/22/25         Thu
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                       1          34          16          30           9
Temp                    3  5  6  9 18 30 30 26 24 23 20 19 26 30 27 21 17 14 12
Dewpt                  -5 -4  1  2  5 11 13 12 11 10  9  9 13 13 13  9  8  6  5
RH                     68 65 79 72 56 44 49 55 57 57 62 64 57 49 55 59 67 70 73
Wind dir                S  S SW  S SE  W  W  W  W  W  W  W  W  W  W  W SW SW  S
Wind spd                8  9  8 10  5 14 17 14 12 10  8  5  5  8  5  5  5  5  5
Wind gust                             29 35 29 23
Clouds                 B1 B1 B2 B1 SC SC FW SC SC B1 B1 B1 SC SC SC SC FW FW SC
PoP 12hr                      5           5          10           5           0
QPF 12hr                      0           0           0           0           0
Snow 12hr                 00-00       00-00       00-00
Wind chill            -11 -9 -7 -5
Min chill             -13    -9    -6


Date           01/23/25  Fri 01/24/25  Sat 01/25/25  Sun 01/26/25  Mon 01/27/25
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      20    28      11    20       0    22       6    28
Temp          21 32 26   21 25 25 20   15 16 18  9    2 14 20 13    9 20 25
Dewpt         10 19 18   16 19 17 13    8  8  7  1   -5  4  9  4    3 10 15
PWind dir         S      SW     N      NW     N      SW     S       S     S
Wind char        LT      LT    LT      LT    LT      LT    LT      LT    LT
Avg clouds    B1 B2 B2   OV OV OV B2   B2 B2 B1 SC   SC SC SC SC   SC SC FW
PoP 12hr         10      60    80      40    20       5     5       0     0
Snow                 C    L  D  L  C    C  S

$$
MTZ326-211100-
Bozeman-Gallatin MT
45.78N 111.16W Elev. 4475 ft
806 PM MST Mon Jan 20 2025

Date          Mon 01/20/25      Tue 01/21/25            Wed 01/22/25         Thu
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          29           8          26           3
Temp                   -4 -1  2  5 16 25 25 20 16 15 13 11 21 25 22 14  9  7  5
Dewpt                 -11 -8 -5 -1  3  9 13 11  8  8  7  6 13 13 12  7  3  2  0
RH                     71 71 72 76 56 50 60 67 70 73 76 80 71 60 65 73 76 79 79
Wind dir                S  S SE SW  S  W  W  W SW SW SW SW  W  W  W SW  S  S  S
Wind spd                8  8  9  8  5 10 10  9  5  5  4  3  3  4  3  3  3  3  3
Wind gust                             21 20
Clouds                 B1 SC B2 B2 B2 B1 B1 SC B1 B2 B2 B2 B1 SC SC SC FW FW FW
PoP 12hr                      0           5          20          10           0
QPF 12hr                      0           0           0           0           0
Snow 12hr                 00-00       00-00       00-00
Snow                                      S  S  S  S
Wind chill            -19-15-13 -8                                           -2
Min chill             -21   -18   -13                                        -2


Date           01/23/25  Fri 01/24/25  Sat 01/25/25  Sun 01/26/25  Mon 01/27/25
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      16    26       4    17      -5    18       2    27
Temp          19 30 22   18 23 24 15    9 13 15  5   -2 10 17  8    6 19 24
Dewpt         10 20 15   12 19 18 11    5  7  7  0   -7  2  7  2   -1 10 14
PWind dir         S       S     W       N     N       E     S      SE    SW
Wind char        LT      LT    LT      LT    LT      LT    LT      LT    LT
Avg clouds    SC B2 OV   B2 OV OV B2   B2 B2 B1 B1   SC SC SC SC   FW FW FW
PoP 12hr         10      50    80      40    10       5     5       0     0
Snow                 S    C  D  L  C    S

$$
MTZ330-211100-
West Yellowstone-Gallatin MT
44.69N 111.11W Elev. 6644 ft
806 PM MST Mon Jan 20 2025

Date          Mon 01/20/25      Tue 01/21/25            Wed 01/22/25         Thu
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                     -30          13          -8          19         -11
Temp                  -25-24-21-16  2 13 10  5  1 -2 -5 -6 11 19 16  4 -3 -6 -9
Dewpt                 -31-29-25-20 -7  1  1 -1 -4 -7-10-10  3  7  7 -1 -7-10-13
RH                     72 76 81 81 65 58 66 76 79 79 78 82 69 59 67 79 82 82 82
Wind dir                S  S  S SW SW SW SW SW SW SW SW NW NW NW  W  W  W  N SE
Wind spd                5  5  4  6  8 11  8  5  2  2  1  1  2  4  2  1  1  1  1
Wind gust                          18 23 18
Clouds                 SC SC B1 OV B2 SC SC SC SC SC B1 B2 B1 SC SC SC SC SC SC
PoP 12hr                      0           5          20          10           0
QPF 12hr                      0           0           0           0           0
Snow 12hr                 00-00       00-00       00-00
Snow                                            S  S
Wind chill            -41-40-34-32-12 -1 -2 -6
Min chill             -44   -40   -34    -9    -6    -5    -7          -3    -9


Date           01/23/25  Fri 01/24/25  Sat 01/25/25  Sun 01/26/25  Mon 01/27/25
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          21       2    22      -4    15     -12    21      -5    27
Temp          11 17  7    3 16 19  8   -1 10 12 -3  -11  9 18  1   -3 17 23
Dewpt          3  8  2   -1 10 12  4   -5  1  3 -7  -16 -1  7 -5   -9  7 13
PWind dir         S       S    SW       N    NE      NE    NE      NE    SE
Wind char        LT      LT    LT      LT    LT      LT    LT      LT    LT
Avg clouds    SC B1 B1   B2 OV B2 B2   B2 B1 SC SC   SC SC SC SC   FW SC FW
PoP 12hr          5      30    60      50    30       5     5       0     5
Snow                      C  L  L  C    C  C  S

$$
MTZ328-211100-
Dillon-Beaverhead MT
45.26N 112.55W Elev. 5357 ft
806 PM MST Mon Jan 20 2025

Date          Mon 01/20/25      Tue 01/21/25            Wed 01/22/25         Thu
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                      -4          29           6          26           6
Temp                   -1  1  5  8 20 28 23 17 14 12  9  8 19 26 21 12  9  8  8
Dewpt                 -10 -8 -3 -2  3  9 10  7  6  3  2  1  9 12 11  4  1  0 -1
RH                     65 65 69 63 47 44 57 64 70 66 72 72 64 55 65 70 69 69 66
Wind dir               SW  S  S  S SW SW SW SW SW SW  S SW SW  W SW SW  S  S  S
Wind spd               11 11 11 16 12 13 11 11 10  8  6  6  5  4  3  5  5  5  5
Clouds                 SC B1 B2 B2 SC FW FW FW FW FW FW SC FW FW SC FW FW FW FW
PoP 12hr                      0           0           0           0           0
QPF 12hr                      0           0           0           0           0
Snow 12hr                 00-00       00-00       00-00
Wind chill            -18-16-11-10                   -2 -4             -1 -2 -3
Min chill             -20   -17   -12                -2    -5          -1    -3


Date           01/23/25  Fri 01/24/25  Sat 01/25/25  Sun 01/26/25  Mon 01/27/25
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      14    28       5    18      -4    18       2    28
Temp          23 28 18   15 24 24 15    9 14 16  4   -2 11 16  7    5 19 24
Dewpt          9 16 10    8 15 16 10    4  5  5 -2   -9  0  3 -3   -4  7 12
PWind dir         S       S    SW       N     N       E    SW       S    SW
Wind char        LT      GN    GN      GN    GN      LT    LT      LT    LT
Avg clouds    SC B1 B1   B2 B2 B2 B2   B2 B2 B1 SC   SC SC SC SC   FW FW FW
PoP 12hr          0      10    30      20     5       0     0       0     0
Snow                         C  C  S

$$
MTZ305-211100-
Havre-Hill MT
48.54N 109.76W Elev. 2585 ft
806 PM MST Mon Jan 20 2025

Date          Mon 01/20/25      Tue 01/21/25            Wed 01/22/25         Thu
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                      -4          31          18          29           7
Temp                    7 13 17 18 25 30 28 23 23 24 23 23 26 29 25 17 14 12 11
Dewpt                   0  6 10 12 16 21 22 18 17 19 19 18 21 21 19 13 10  8  6
RH                     72 73 73 77 68 69 78 81 77 81 84 81 81 72 78 84 84 84 80
Wind dir               SW SW SW SW SW  W  W  W  W  W  W  W  W NW  W  W  W SW SW
Wind spd               13 17 17 19 18 17 13 13 17 18 19 18 19 19 13 10 10 10 12
Wind gust                 27                      28
Clouds                 B2 B2 B2 B2 OV OV B2 B1 B2 B2 B2 B2 B2 B1 SC FW FW FW SC
PoP 12hr                      5          40          40          20           0
QPF 12hr                      0        0.02        0.01        0.02           0
Snow 12hr                 00-00           T           T
Snow                                C  C  S  S  C  C  S  S
Wind chill            -10 -4                                              -1 -4
Min chill             -19    -8                                              -4


Date           01/23/25  Fri 01/24/25  Sat 01/25/25  Sun 01/26/25  Mon 01/27/25
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      17    28       8    19       3    21       9    29
Temp          23 29 25   20 25 25 17   14 16 17 10    5 16 19 16   15 24 27
Dewpt         15 21 22   17 20 20 14   10 11 12  6    0  9 12 11    9 15 20
PWind dir        SW       W    NW      NW     W      SW    SW      SW    SW
Wind char        GN      GN    GN      GN    GN      GN    GN      GN    GN
Avg clouds    SC B2 OV   OV B2 B2 B2   B2 B2 B1 SC   SC SC SC SC   SC SC SC
PoP 12hr          5      60    20      20    10       0     0       5     5
Snow                 L    L  S     S

$$
MTZ314-211100-
Lewistown-Fergus MT
47.05N 109.46W Elev. 4144 ft
806 PM MST Mon Jan 20 2025

Date          Mon 01/20/25      Tue 01/21/25            Wed 01/22/25         Thu
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                      -4          31          17          25           8
Temp                    5 13 16 18 28 31 26 22 22 22 20 20 22 24 22 18 15 14 12
Dewpt                  -1  5  9 11 16 18 18 16 14 16 15 16 19 17 14 10  7  6  2
RH                     76 70 73 73 60 58 71 77 71 77 81 84 88 74 71 70 70 70 63
Wind dir               SW SW SW  W  W  W  W  W  W  W NW NW NW NW NW  W  W  W SW
Wind spd                9 11 11 14 16 23 20 18 18 20 21 24 25 23 16 11  8  8  6
Wind gust                    21    28 35 34 32 31 35 37 39 36 35 28
Clouds                 B2 B1 B1 B1 B2 B1 B2 OV OV OV OV OV B2 B2 SC FW FW FW FW
PoP 12hr                      0          30          60          50           5
QPF 12hr                      0           0        0.09        0.14           0
Snow 12hr                 00-00       00-00           2
Snow                                      C  C  L  L  C  C  S  S
Obvis                              BS BS BS BS BS BS BS BS
Wind chill             -9 -1
Min chill             -16    -6
Winter Weath               Y  Y  Y  Y  Y     Y  Y  Y  Y  Y  Y  Y


Date           01/23/25  Fri 01/24/25  Sat 01/25/25  Sun 01/26/25  Mon 01/27/25
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      19    25       7    16      -1    26      11    37
Temp          28 31 27   21 23 21 16   12 13 12  5    1 19 20 16   17 31 29
Dewpt         15 21 22   18 20 17 13    9  8  6 -1   -7  9 11  7    7 20 20
PWind dir        SW       W    NW      NW    NW      SW    SW      SW    SW
Wind char        GN      GN    GN      GN    GN      LT    LT      LT    LT
Avg clouds    SC B1 B2   OV OV B2 OV   OV OV B1 B1   SC SC SC SC   SC SC FW
PoP 12hr         10      80    60      40    30      10     5       5     5
Snow                 C    D  L  C  C    C  C  S

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