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Issued by NWS Great Falls, MT

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Point Forecast Matrices
National Weather Service Great Falls MT
213 PM MDT Tue Sep 2 2025

MTZ312-031000-
Great Falls-Cascade MT
47.47N 111.38W Elev. 3663 ft
213 PM MDT Tue Sep 2 2025

Date           09/02/25      Wed 09/03/25            Thu 09/04/25            Fri
MDT 3hrly     15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
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                      53          89          56          72          44
Temp          84 86 72 64 57 53 60 76 86 87 73 65 59 57 63 69 70 69 60 53 48 45
Dewpt         47 46 48 51 51 51 51 51 49 47 48 46 45 46 50 50 46 41 37 34 34 34
RH            28 25 42 63 80 93 72 42 28 25 41 50 60 67 62 51 42 36 42 48 58 65
Wind dir       N  N NE NE NE SW SW NE  N  N  E SW SW NW  N  N  N  N NE  E  E  S
Wind spd       8 10  8  6  4  2  2  2  5  9  5  6  6  8 11 13 14 14 10  5  4  3
Clouds        SC SC SC FW CL CL CL FW SC SC SC SC FW FW SC B1 B1 SC SC 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
Obvis                   H  H  H  H  H  H  H  H  K  K  K


Date           09/05/25  Sat 09/06/25  Sun 09/07/25  Mon 09/08/25  Tue 09/09/25
MDT 6hrly     12 18 00   06 12 18 00   06 12 18 00   06 12 18 00   06 12 18
UTC 6hrly     18 00 06   12 18 00 06   12 18 00 06   12 18 00 06   12 18 00

Max/Min          74      45    81      51    81      53    81      53    80
Temp          65 73 54   46 69 79 59   52 74 78 60   53 75 79 60   53 73 75
Dewpt         34 33 34   34 37 37 40   40 46 44 49   48 49 42 44   44 47 46
PWind dir         E       E    SE      SE    SW      SW    SW      SW    SW
Wind char        LT      LT    LT      LT    LT      LT    LT      LT    LT
Avg clouds    FW CL FW   FW FW FW FW   SC B1 B1 B1   SC SC SC SC   SC B1 B1
PoP 12hr          0       0     0       5    10      20    10      10    20
Rain shwrs                                       S                        S

$$
MTZ303-031000-
Cut Bank-Glacier MT
48.60N 112.39W Elev. 3838 ft
213 PM MDT Tue Sep 2 2025

Date           09/02/25      Wed 09/03/25            Thu 09/04/25            Fri
MDT 3hrly     15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
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                      49          87          55          69          41
Temp          80 80 66 58 54 50 56 73 84 86 70 61 58 56 60 64 67 66 56 50 45 41
Dewpt         50 50 50 51 51 49 49 51 46 42 44 43 43 45 49 48 44 39 37 34 32 32
RH            35 35 56 77 90 96 77 46 27 21 39 51 57 66 67 56 43 37 49 54 60 70
Wind dir       N  N NE NE SE SE  S  S NW  N  E NW  N  N  N  N  N  N NE NE SE SE
Wind spd      12 12  8  4  3  4  5  9  8  9  5  6 11 14 18 17 16 14  8  4  3  3
Wind gust                                            25    27
Clouds        SC SC SC CL FW FW FW FW FW SC SC FW SC SC SC SC SC FW SC 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
Obvis                K  K  K  K  K  H  H  K  K  K  K  H
Heat index    80
Max heat         81                      84    81


Date           09/05/25  Sat 09/06/25  Sun 09/07/25  Mon 09/08/25  Tue 09/09/25
MDT 6hrly     12 18 00   06 12 18 00   06 12 18 00   06 12 18 00   06 12 18
UTC 6hrly     18 00 06   12 18 00 06   12 18 00 06   12 18 00 06   12 18 00

Max/Min          72      42    78      47    81      50    79      49    76
Temp          63 71 51   42 67 75 55   47 74 77 58   50 73 77 57   49 70 74
Dewpt         34 34 31   30 36 37 37   37 43 44 46   44 47 43 43   42 45 42
PWind dir        SE      SE    SE      SE     W       W    NW       W    SW
Wind char        GN      GN    GN      GN    GN      GN    GN      LT    GN
Avg clouds    FW CL FW   FW FW FW FW   SC SC SC B1   SC SC SC B1   B1 B1 SC
PoP 12hr          0       0     0       0    10      20    10      10    20
Rain shwrs                                       S                        S

$$
MTZ319-031000-
Helena-Lewis & Clark MT
46.61N 111.96W Elev. 3893 ft
213 PM MDT Tue Sep 2 2025

Date           09/02/25      Wed 09/03/25            Thu 09/04/25            Fri
MDT 3hrly     15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
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                      56          93          58          76          48
Temp          86 88 77 70 64 58 61 78 89 92 79 71 64 60 63 71 74 72 64 58 53 49
Dewpt         42 42 41 45 47 47 48 50 44 41 39 39 39 41 46 48 46 43 41 39 39 38
RH            21 20 28 41 54 67 62 37 21 17 24 31 40 49 54 44 37 35 43 49 59 66
Wind dir       N  N  W  W  W  W NE  E  N NW  W  W  W NW  N  N  N  N  N  N  N NW
Wind spd       6  9  5  4  2  1  1  4  9 10  6  6  5  5 11 16 19 18 10  4  2  1
Wind gust                                               21 27 31 29
Clouds        FW FW FW FW FW CL CL FW FW FW FW FW FW FW FW FW FW FW 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
Obvis             H  H        H  H  H  H        H  H  K


Date           09/05/25  Sat 09/06/25  Sun 09/07/25  Mon 09/08/25  Tue 09/09/25
MDT 6hrly     12 18 00   06 12 18 00   06 12 18 00   06 12 18 00   06 12 18
UTC 6hrly     18 00 06   12 18 00 06   12 18 00 06   12 18 00 06   12 18 00

Max/Min          78      49    83      55    80      53    80      53    78
Temp          65 78 61   50 70 81 65   56 72 76 64   54 69 79 64   54 70 75
Dewpt         39 38 38   37 43 41 44   44 50 48 49   46 49 45 46   45 49 44
PWind dir        NE      NW     E       W    SW       W     W       W    SE
Wind char        LT      LT    LT      LT    LT      LT    LT      LT    LT
Avg clouds    FW CL CL   FW FW FW SC   B1 B1 B1 B2   B1 SC SC B1   SC B1 B1
PoP 12hr          0       0     5      10    30      20    20      20    30
Rain shwrs                                    C  S          S  S    S     C
Tstms                                         S

$$
MTZ326-031000-
Bozeman-Gallatin MT
45.78N 111.16W Elev. 4475 ft
213 PM MDT Tue Sep 2 2025

Date           09/02/25      Wed 09/03/25            Thu 09/04/25            Fri
MDT 3hrly     15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
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                      51          89          51          80          43
Temp          87 87 73 63 59 53 60 77 87 87 74 64 57 53 61 74 78 76 64 57 49 44
Dewpt         38 37 38 40 42 39 42 43 39 37 40 40 38 37 41 45 44 42 42 44 39 37
RH            18 17 28 43 53 59 51 30 18 17 29 41 49 54 48 35 30 30 45 62 68 76
Wind dir      NW  N NE  S  S  S  S NW NW  N  E  S  S  S NW NW NW  N NE  E  E  E
Wind spd       6 10  6  5  4  3  2  3  6  9  5  6  6  5  5  9 13 16 11  8  5  5
Wind gust                                                     24 27
Clouds        FW CL FW FW FW CL CL CL FW FW FW FW FW FW FW FW FW FW 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
Obvis                H  H  H  H        H  H  H     H  H


Date           09/05/25  Sat 09/06/25  Sun 09/07/25  Mon 09/08/25  Tue 09/09/25
MDT 6hrly     12 18 00   06 12 18 00   06 12 18 00   06 12 18 00   06 12 18
UTC 6hrly     18 00 06   12 18 00 06   12 18 00 06   12 18 00 06   12 18 00

Max/Min          78      45    82      50    78      49    77      47    78
Temp          65 77 57   46 70 79 61   51 70 74 59   50 69 75 58   48 70 74
Dewpt         39 37 40   35 40 39 45   43 50 46 50   45 50 44 45   42 46 42
PWind dir        NE       E    NE      SE    SW       S     W       S    SW
Wind char        LT      LT    LT      LT    LT      LT    LT      LT    LT
Avg clouds    FW CL FW   FW FW FW B1   B1 B2 B1 B2   B1 SC SC B1   SC SC SC
PoP 12hr          0       0     5      20    40      30    20      20    20
Rain shwrs                         S    S  S  C  C          S  S          S
Tstms                                         S  S

$$
MTZ330-031000-
West Yellowstone-Gallatin MT
44.69N 111.11W Elev. 6644 ft
213 PM MDT Tue Sep 2 2025

Date           09/02/25      Wed 09/03/25            Thu 09/04/25            Fri
MDT 3hrly     15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
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                      39          81          40          78          36
Temp          80 79 64 54 44 39 50 74 80 79 64 54 45 40 54 73 76 73 60 50 42 37
Dewpt         31 31 34 34 32 33 35 37 31 31 36 36 33 32 36 37 32 35 40 42 40 36
RH            17 17 32 46 62 79 56 26 17 17 35 50 62 73 50 27 20 25 47 74 93 96
Wind dir       N  N NW  E  E  N  N  W NW NW  N NE  N  N  N NW NW  N  N NE NE NE
Wind spd       5  8  5  2  1  0  0  4  9  8  2  2  0  0  0  6 11 12 10  6  3  1
Clouds        SC SC FW FW FW FW FW FW FW FW FW FW FW FW FW FW FW FW 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
Obvis                                              H  H


Date           09/05/25  Sat 09/06/25  Sun 09/07/25  Mon 09/08/25  Tue 09/09/25
MDT 6hrly     12 18 00   06 12 18 00   06 12 18 00   06 12 18 00   06 12 18
UTC 6hrly     18 00 06   12 18 00 06   12 18 00 06   12 18 00 06   12 18 00

Max/Min          76      37    74      41    68      37    69      37    69
Temp          67 73 50   37 68 70 51   42 64 64 49   38 64 67 49   37 65 67
Dewpt         41 33 38   34 40 43 46   42 48 44 46   38 46 39 41   37 42 36
PWind dir         N      NE    SW       S    SW       S    SW      SE     S
Wind char        LT      LT    LT      LT    LT      LT    LT      LT    LT
Avg clouds    FW FW FW   FW SC SC B2   B2 B2 B2 B2   B1 B1 B1 B1   B1 B1 B1
PoP 12hr          0       0    20      40    60      40    30      20    30
Rain shwrs                      S  C    C  C  L  C       S  C  S          C
Tstms                           S  S          C  S

$$
MTZ328-031000-
Dillon-Beaverhead MT
45.26N 112.55W Elev. 5357 ft
213 PM MDT Tue Sep 2 2025

Date           09/02/25      Wed 09/03/25            Thu 09/04/25            Fri
MDT 3hrly     15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
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                      51          86          51          81          44
Temp          85 85 70 61 56 52 59 78 85 85 70 61 54 52 61 75 79 76 64 55 48 44
Dewpt         38 38 38 38 37 36 39 41 38 37 38 37 35 35 41 43 44 45 46 47 43 42
RH            19 19 31 42 49 54 47 27 19 18 31 41 48 52 48 32 29 33 52 74 83 93
Wind dir       N NE NE  S  S  S SW SW NW  N NE SW  S  S SW  N  N NE NE NE NE NE
Wind spd       4  5  5  5  5  4  3  2  5  5  5  6  6  6  6 10 13 14 12 10  8  5
Clouds        FW FW FW FW CL CL CL CL FW FW FW FW FW FW CL CL FW FW 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
Obvis             H  H  H  H  H  H                 H  H


Date           09/05/25  Sat 09/06/25  Sun 09/07/25  Mon 09/08/25  Tue 09/09/25
MDT 6hrly     12 18 00   06 12 18 00   06 12 18 00   06 12 18 00   06 12 18
UTC 6hrly     18 00 06   12 18 00 06   12 18 00 06   12 18 00 06   12 18 00

Max/Min          79      46    79      49    74      47    73      46    72
Temp          65 78 56   47 68 75 56   49 67 71 54   47 67 71 54   47 65 70
Dewpt         45 43 42   39 45 49 51   47 52 49 49   45 50 46 46   42 48 45
PWind dir        NE       E    SW       S    SW      SW    SW      SW     S
Wind char        LT      LT    LT      LT    LT      LT    LT      LT    LT
Avg clouds    FW CL FW   FW FW SC B2   B2 B1 B1 B1   B1 SC SC B1   B1 B1 B1
PoP 12hr          0       0    20      30    40      20    20      20    30
Rain shwrs                      S  C    C  C  C  S          S  S    S  S  C
Tstms                           S  S          S  S

$$
MTZ305-031000-
Havre-Hill MT
48.54N 109.76W Elev. 2585 ft
213 PM MDT Tue Sep 2 2025

Date           09/02/25      Wed 09/03/25            Thu 09/04/25            Fri
MDT 3hrly     15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
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                      50          79          56          70          40
Temp          83 81 68 61 56 52 56 70 77 78 67 63 59 58 61 66 68 66 56 50 44 40
Dewpt         53 53 57 55 53 50 49 53 52 53 55 53 51 51 52 46 38 35 39 39 37 37
RH            36 38 68 81 90 93 77 55 42 42 65 70 75 77 72 48 33 32 53 66 76 89
Wind dir      NW  N NE  E  E  E  E  E  E NW  S SW  W NW  N  N  N  N  N NE  E  E
Wind spd       9 11 12 10  8  6  5  3  2  3  5  8 11 12 17 19 19 18 10  3  2  2
Wind gust                                                     32
Clouds        B1 B2 FW FW FW FW FW SC B1 B1 B1 SC SC SC SC SC FW FW 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
Obvis                H  H     K  K  H  H  H  H  H  H  H


Date           09/05/25  Sat 09/06/25  Sun 09/07/25  Mon 09/08/25  Tue 09/09/25
MDT 6hrly     12 18 00   06 12 18 00   06 12 18 00   06 12 18 00   06 12 18
UTC 6hrly     18 00 06   12 18 00 06   12 18 00 06   12 18 00 06   12 18 00

Max/Min          71      41    77      46    80      51    81      51    79
Temp          61 70 50   42 67 75 56   47 71 79 60   52 73 78 60   52 72 77
Dewpt         39 36 37   34 38 38 40   37 43 44 47   46 50 48 49   46 50 48
PWind dir        NE       E     E       E    SW      SE     W       E     S
Wind char        LT      LT    LT      GN    LT      LT    LT      LT    LT
Avg clouds    FW FW FW   FW FW FW FW   FW SC SC SC   SC SC SC SC   SC SC SC
PoP 12hr          0       0     0       0     0      10     5       5    10

$$
MTZ314-031000-
Lewistown-Fergus MT
47.05N 109.46W Elev. 4144 ft
213 PM MDT Tue Sep 2 2025

Date           09/02/25      Wed 09/03/25            Thu 09/04/25            Fri
MDT 3hrly     15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
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                      50          81          54          69          39
Temp          83 81 67 60 55 52 58 72 80 79 66 61 57 56 61 64 67 64 54 48 42 40
Dewpt         47 48 49 50 51 50 50 52 52 52 53 50 46 44 50 50 44 39 36 35 32 32
RH            28 32 52 69 86 93 75 49 38 39 63 67 67 64 67 60 43 40 50 60 67 73
Wind dir      NW NW NW  E  E SE SE NE NW NW  S SW SW  W NW NW NW NW  N NW  S  S
Wind spd      10 10  5  4  3  3  2  2  4  5  3  6  6  6 12 19 18 17  8  2  2  2
Wind gust                                                     28 27
Clouds        SC SC SC FW FW FW FW FW FW B1 B1 SC SC SC SC B1 SC SC SC SC FW FW
PoP 12hr                      0           0           0           0           0
QPF 12hr                      0           0           0           0           0
Snow 12hr                 00-00       00-00       00-00
Obvis                      H  H  H  H  H  H  H  H  K  K
Heat index                            80
Max heat         82                      80


Date           09/05/25  Sat 09/06/25  Sun 09/07/25  Mon 09/08/25  Tue 09/09/25
MDT 6hrly     12 18 00   06 12 18 00   06 12 18 00   06 12 18 00   06 12 18
UTC 6hrly     18 00 06   12 18 00 06   12 18 00 06   12 18 00 06   12 18 00

Max/Min          70      42    77      49    78      51    78      51    77
Temp          62 67 49   43 69 74 55   50 73 75 58   52 72 75 57   52 72 73
Dewpt         35 34 34   32 36 39 37   35 43 45 48   44 47 46 45   43 45 47
PWind dir         E       E    SE      SE     W      SW     W      SE     W
Wind char        LT      LT    LT      LT    LT      LT    LT      LT    LT
Avg clouds    FW CL CL   FW FW CL FW   SC SC SC B1   SC SC SC SC   SC SC SC
PoP 12hr          0       0     0       5    10      20    20      20    20
Rain shwrs                                       S          S  S          S

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