Point Forecast Matrices
Issued by NWS Great Falls, MT

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Point Forecast Matrices
National Weather Service Great Falls MT
236 PM MST Mon Feb 19 2018

MTZ012-201100-
Great Falls-Cascade MT
47.47N 111.38W Elev. 3663 ft
236 PM MST Mon Feb 19 2018

Date          Mon 02/19/18      Tue 02/20/18            Wed 02/21/18         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          13         -12          16          -8
Temp             -2 -8-13-16-17-13  4 13  6  0 -3 -4 -9-11  3 16 11  0 -5 -8 -8
Dewpt            -8-12-18-20-22-22 -7  0 -7 -9-10-10-13-17 -8  1 -3 -6-10-12-12
RH               75 82 77 81 77 63 59 55 54 65 71 75 82 74 59 51 52 75 78 82 82
Wind dir         NE SW SW SW SW SW SW SW SW  S  S SW SW SW SW SW SW  S SW SW SW
Wind spd          3  4  6  8  9 10 11 11 10  9  8  8  6  8 10 10 10  9  9  9  8
Clouds           OV B1 B2 SC SC FW B1 B1 B1 B1 B2 B1 B1 SC FW CL FW FW FW FW FW
PoP 12hr                     20          10          10          20           0
QPF 12hr                      0           0           0           0           0
Snow 12hr                 00-00       00-00       00-00
Snow              S  S                                S  S
Wind chill      -10-19-29-34-36-32-12 -1 -9-15-18-19-24-28-12    -3-15-21-25-24
Min chill       -10   -29   -36   -36    -9   -18   -24   -28    -5   -21   -25
Wind Chill              Y  Y  Y  Y  Y


Date           02/22/18  Fri 02/23/18  Sat 02/24/18  Sun 02/25/18  Mon 02/26/18
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          13      -5    23      11    28      10    27      11    28
Temp           5  7 -3   -2 17 23 13   14 25 26 12   12 24 25 12   16 27 25
Dewpt         -5 -2 -8   -6  4  9  5    8 13 14  6    7 12 13  6   11 15 13
PWind dir         W       W    SW      SW    SW      SW    SW      SW    SW
Wind char        LT      GN    BZ      BZ    BZ      GN    GN      GN    GN
Avg clouds    SC SC B1   SC FW FW B1   B1 B1 B1 B2   B1 B1 B1 B2   B1 B1 B1
PoP 12hr          0      10     5      10    10      20    20      20    20
Snow                                             S    S  S  S       S  S

$$
MTZ010-201100-
Cut Bank-Glacier MT
48.60N 112.39W Elev. 3838 ft
236 PM MST Mon Feb 19 2018

Date          Mon 02/19/18      Tue 02/20/18            Wed 02/21/18         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                     -18          15         -15          14          -7
Temp              0-11-16-18-14-10  6 15  7  1 -3 -7-13-14  3 14  8 -5 -6 -7 -5
Dewpt            -7-16-22-24-20-16 -3  2 -2 -3 -6-10-16-17 -6  0 -3-10-12-14-12
RH               71 78 73 73 73 74 66 55 66 83 86 86 86 86 65 53 60 78 74 71 71
Wind dir         SE SW  W  W  W  W  W  W NW  N  W  W  W SW SW SW SW SW  W  W  W
Wind spd          3  5  8  8  6  9 10  9  9  6  4  6  8  6 10 11 10  8  9  9 11
Clouds           OV B1 FW FW B1 B1 SC B1 B2 B2 B2 SC SC FW CL CL FW FW FW FW B1
PoP 12hr                     10          20          20          10           0
QPF 12hr                      0           0           0           0           0
Snow 12hr                 00-00       00-00       00-00
Snow                             S  S  S  S  S  S  S
Wind chill       -8-25-34-36-30-28 -9    -7-12-13-21-30-30-12    -6-20-23-24-23
Min chill        -8   -34   -36   -30    -7   -13   -30   -31    -7   -23   -25
Wind Chill              Y  Y  Y  Y  Y


Date           02/22/18  Fri 02/23/18  Sat 02/24/18  Sun 02/25/18  Mon 02/26/18
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          14      -5    22      11    25       7    23       8    23
Temp           7  8 -4   -1 17 21 12   14 23 23 11    8 20 21 10   10 19 22
Dewpt         -3 -2 -8   -6  4  8  6    9 14 12  7    3 10 11  6    6 10 12
PWind dir        NW       W    SW       W     W       W     W      SW    SW
Wind char        GN      GN    BZ      BZ    BZ      GN    GN      GN    GN
Avg clouds    B1 B1 B1   SC FW SC B1   B1 B1 B2 B2   B1 B1 B1 B1   B1 B1 B2
PoP 12hr         10      10     5      10    20      20    20      20    20
Snow                                          S  S    S  S          S  S  S

$$
MTZ014-201100-
Helena-Lewis & Clark MT
46.61N 111.96W Elev. 3893 ft
236 PM MST Mon Feb 19 2018

Date          Mon 02/19/18      Tue 02/20/18            Wed 02/21/18         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                     -14          13          -8          18          -4
Temp              5 -3 -5 -9-14-10  4 13  7  2  0 -3 -7 -6  9 18 15  7  3 -3 -4
Dewpt            -8-14-15-19-22-19-10 -1 -5 -4 -6 -9-12-10 -3  3  2  2 -2 -8 -9
RH               54 58 61 60 66 63 51 53 57 75 75 75 78 82 57 51 55 79 79 78 78
Wind dir         NW  W  W SW  W SW  E  E SE SW  S SW SW  S  S SW  S  S  S  S  S
Wind spd          6  4  3  2  3  2  3  5  4  2  4  3  3  3  3  4  3  2  3  3  3
Clouds           B1 B2 B2 B1 B1 SC SC SC SC B1 B1 B1 B1 SC SC SC SC FW FW FW SC
PoP 12hr                     10          10          10          10          10
QPF 12hr                      0           0           0           0           0
Snow 12hr                 00-00       00-00       00-00
Wind chill       -7-13-14   -24    -3    -2   -10-11-16-15             -4-11-12
Min chill        -7   -15   -24   -14    -2   -10   -16   -17          -4   -12
Wind Chill              Y  Y  Y  Y  Y


Date           02/22/18  Fri 02/23/18  Sat 02/24/18  Sun 02/25/18  Mon 02/26/18
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          18      -2    23      10    29      13    28      14    30
Temp          10 16  3   -1 17 23 14   11 24 28 17   14 23 27 16   16 25 29
Dewpt         -2  5 -4   -6  4 11  8    5 12 16 12    7 10 15 10   10 12 18
PWind dir        NW      NW    SW      SW     S      SW     W       W     S
Wind char        LT      LT    LT      LT    LT      LT    LT      LT    LT
Avg clouds    SC B1 B1   SC SC SC B1   B1 B2 B2 B2   B2 B1 B1 B2   B2 B1 B1
PoP 12hr         10      10     5      10    20      30    20      20    20
Snow                                          S  C    C  S  S       S  S  S

$$
MTZ055-201100-
Bozeman-Gallatin MT
45.78N 111.16W Elev. 4475 ft
236 PM MST Mon Feb 19 2018

Date          Mon 02/19/18      Tue 02/20/18            Wed 02/21/18         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          10          -9          16          -5
Temp              3 -6-11-13-16-15 -2  8  6 -7 -8 -6 -7 -6  6 15 14  5 -1 -5 -5
Dewpt            -7-13-17-18-21-21-11 -4 -5-12-13-11-12-12 -6  0  1 -1 -6-10-11
RH               62 71 74 77 77 73 64 57 60 78 78 78 78 74 57 50 55 76 79 78 74
Wind dir         NW  S  S  S SE SE  N  N  E SE SE SE  S  S SW  W SW  S  S  S  S
Wind spd          2  4  3  2  3  2  2  3  3  5  4  5  3  5  4  4  4  5  4  4  3
Clouds           B2 B2 B2 B2 B2 B2 SC SC SC SC B1 B1 B2 B2 B1 SC SC SC SC SC SC
PoP 12hr                     20          10          10          20          10
QPF 12hr                      0           0           0           0           0
Snow 12hr                 00-00       00-00       00-00
Snow              S  S  S                             S  S
Wind chill         -17-20   -26          -1-20-19-19-16-19 -3       -6-11-16-14
Min chill        -6   -20   -26   -27    -1   -22   -20   -19         -11   -16


Date           02/22/18  Fri 02/23/18  Sat 02/24/18  Sun 02/25/18  Mon 02/26/18
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          18      -4    23       7    27      11    28      12    31
Temp          11 17  1   -2 15 23 11    9 24 25 16   12 24 27 16   13 28 29
Dewpt         -2  3 -6   -7  1 10  5    3 11 12 10    5 11 14 10    7 15 16
PWind dir         W       W    SW      SW    SW      SW     W      SW    SW
Wind char        LT      LT    LT      LT    LT      GN    GN      LT    LT
Avg clouds    SC B1 B1   SC SC SC SC   B1 B2 B2 B2   B2 B2 B2 B2   B2 B1 B2
PoP 12hr         10      10    10      20    20      30    30      20    20
Snow                                    S  S  S  C    C  C  S       S  S  S

$$
MTZ055-201100-
West Yellowstone-Gallatin MT
44.66N 111.11W Elev. 6700 ft
236 PM MST Mon Feb 19 2018

Date          Mon 02/19/18      Tue 02/20/18            Wed 02/21/18         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                     -26           8         -17          13         -12
Temp              6 -5-13-17-21-25 -3  7  6 -8-10-10-13-16  2 12 11  0 -5 -5-10
Dewpt            -5-14-21-24-27-31-11 -4 -5-12-13-13-15-17 -5  1  2 -3 -7 -7-12
RH               60 64 66 69 72 72 68 60 60 82 86 86 90 95 72 60 66 87 91 91 90
Wind dir          N  N NE  E SE SE  W SW SW SW  S  S  S  S SW SW SW SW  S  S SE
Wind spd          6  4  3  3  3  2  2  9  9  5  6  5  6  5  8 11  9  3  4  4  4
Clouds           OV B2 B1 B1 B2 B1 B1 B1 B1 B1 B1 B2 B2 B2 B2 B2 B2 B1 B1 B1 B1
PoP 12hr                     10          20          20          20          20
QPF 12hr                      0           0        0.02        0.02        0.01
Snow 12hr                 00-00       00-00           1
Snow                                   S  S  S  S  S  S  S  S  S  S  S  S  S  S
Wind chill       -6-16-23-27-32       -6 -8-21-25-23-29-31-12 -2 -2 -8-16-16-22
Min chill        -6   -23   -32   -26    -8   -26   -29   -32    -7   -16   -22


Date           02/22/18  Fri 02/23/18  Sat 02/24/18  Sun 02/25/18  Mon 02/26/18
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          18     -10    20       2    21       7    24       9    25
Temp          11 17 -3   -8 13 19  5    4 14 21 11    8 17 24 13   10 20 25
Dewpt          3  8 -6  -11  3 11  3    1  6 13  8    6  8 14 10    8 12 18
PWind dir         S       S     S      SW    SW      SW    SW      SW    SW
Wind char        LT      LT    LT      GN    GN      GN    GN      GN    GN
Avg clouds    B1 B1 B2   B1 B1 B1 B1   B2 B2 B2 OV   B2 B2 B2 B2   B2 B2 B2
PoP 12hr         20      20    20      30    30      40    30      30    40
Snow           S  S       S  S     S    C  C  C  C    C  C  S  S    C  C  C

$$
MTZ008-201100-
Dillon-Beaverhead MT
45.26N 112.55W Elev. 5357 ft
236 PM MST Mon Feb 19 2018

Date          Mon 02/19/18      Tue 02/20/18            Wed 02/21/18         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                     -14          12          -8          13          -4
Temp              2 -3 -3 -8-12-13  1 10  8  0  0 -5 -5 -8  5 12 11  3  2 -3 -3
Dewpt            -8-12-11-15-19-19-11 -5 -5 -6 -4 -8 -9-11 -5 -2 -3 -3 -3 -6 -7
RH               62 64 68 70 70 73 56 50 54 75 83 86 82 86 62 52 52 75 79 86 82
Wind dir         NE NE  E SE  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S  S
Wind spd          9  8  5  4  5  5  4  5  9  6  8  8  8  9  9 11  9  8  9  8  6
Clouds           B1 B2 B2 B1 B2 B1 SC SC SC SC B1 B1 B1 B1 B1 SC B1 SC SC SC SC
PoP 12hr                     10          10          20          20          20
QPF 12hr                      0           0           0           0           0
Snow 12hr                 00-00       00-00       00-00
Snow                                            S  S  S  S  S  S  S  S
Wind chill      -13-18-15-19-26-27 -9    -5-13-14-20-20-25 -9 -2 -2-11-13-18-17
Min chill       -13   -18   -26   -28    -5   -15   -20   -25    -6   -13   -19


Date           02/22/18  Fri 02/23/18  Sat 02/24/18  Sun 02/25/18  Mon 02/26/18
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          17      -2    22       7    26      11    28      11    31
Temp           8 15  4   -2 12 22 10    9 19 26 16   11 21 28 15   12 25 30
Dewpt         -3  1 -2   -6  1  7  5    3  8 12 11    6 10 13 10    7 14 17
PWind dir         S      NE     S       S     S      SW    SW      SW     S
Wind char        LT      GN    LT      GN    GN      GN    GN      GN    GN
Avg clouds    SC B1 B1   SC SC SC B1   B1 B2 B2 B2   B2 B1 B1 B2   B1 B1 B2
PoP 12hr         10      10    10      10    20      30    20      20    20
Snow                                       S  S  S    C  S  S       S  S  S

$$
MTZ011-201100-
Havre-Hill MT
48.54N 109.76W Elev. 2585 ft
236 PM MST Mon Feb 19 2018

Date          Mon 02/19/18      Tue 02/20/18            Wed 02/21/18         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                     -19           8         -16           8         -15
Temp              0 -7-11-13-18-17 -5  8  1 -3 -7-10-15-15 -2  8  1 -8-11-14-14
Dewpt            -7-13-17-20-23-22-10 -2 -5 -7-11-14-18-18 -8  0 -4-11-15-18-17
RH               71 74 74 70 77 77 78 63 75 82 82 82 86 86 75 69 79 86 82 81 86
Wind dir          W SW SW SW SW SW SW SW SW SW SW SW SW SW SW SW SE  S  S SW SW
Wind spd          4  5  6  8 10 11 13 12 11  8  5  5  6  6  6  8  8  6  5  5  6
Clouds           OV OV OV B1 B1 SC B1 B1 B1 B2 B2 B2 B1 SC FW FW FW CL FW FW SC
PoP 12hr                     20          20          20          20           0
QPF 12hr                      0           0           0           0           0
Snow 12hr                 00-00       00-00       00-00
Snow              S  S              S  S        S  S  S  S
Wind chill      -10-20-26-30-39-38-24 -8-16-18-20-23-31-31-15 -4-13-23-25-28-30
Min chill       -10   -26   -39   -41   -18   -20   -31   -32   -13   -25   -31
Wind Chill              Y  Y  Y  Y  Y


Date           02/22/18  Fri 02/23/18  Sat 02/24/18  Sun 02/25/18  Mon 02/26/18
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           8     -12    16       5    24       5    20       3    20
Temp          -1  3 -9  -10  8 16 10    6 18 23  8    6 13 20  6    6 18 18
Dewpt         -7 -2-13  -13  1  8  4    2 10 16  3    3  6 12  2    3 11 12
PWind dir        SW      SW     S      SW    SW       W     W      SW    SW
Wind char        GN      LT    GN      GN    GN      GN    GN      GN    GN
Avg clouds    SC SC SC   SC SC SC SC   B1 B1 B1 B1   B2 B1 B1 B1   B1 B1 B1
PoP 12hr          0      10     5      10    10      20    20      20    10
Snow                                             S    S     S  S    S

$$
MTZ051-201100-
Lewistown-Fergus MT
47.05N 109.46W Elev. 4144 ft
236 PM MST Mon Feb 19 2018

Date          Mon 02/19/18      Tue 02/20/18            Wed 02/21/18         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          11         -11          16          -6
Temp             -3-12-15-17-17-13  5 11  2 -9 -9 -9-11 -8  8 16 10 -1 -4 -6 -6
Dewpt            -7-15-20-22-23-21 -8 -3 -6-13-15-14-16-17 -1  2  0 -4 -9-11-13
RH               82 86 77 77 73 66 54 52 68 82 74 78 78 64 66 53 63 87 78 78 71
Wind dir         NW SW SW  S SW SW  W NW  W  S  S  S  S  S SW SW  S  S  S  S SW
Wind spd          5  3  5  5  5  5  6  9  6  8  8  8  8  8  6  6  6  8  9  8  8
Clouds           OV OV B2 B2 B2 SC SC SC SC SC B1 B1 B1 B1 SC FW FW FW FW FW FW
PoP 12hr                     20          10          10          10           5
QPF 12hr                   0.01           0           0           0           0
Snow 12hr                     T       00-00       00-00
Snow              S  S  S
Wind chill      -15-22-29-32-32-27 -6 -2-11-25-25-25-28-24 -3    -1-15-20-21-21
Min chill       -15   -29   -32   -32   -11   -26   -28   -28    -1   -20   -21
Wind Chill              Y  Y  Y  Y  Y


Date           02/22/18  Fri 02/23/18  Sat 02/24/18  Sun 02/25/18  Mon 02/26/18
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          15      -6    23      10    27      10    25      10    28
Temp          11  8 -3   -3 19 20 10   15 25 25 12   12 22 24 11   14 27 25
Dewpt          0  4 -8  -10  5 12  6   10 13 18  8    8 11 18  7   10 15 18
PWind dir         W       W    SW      SW     W       W     W       W    SW
Wind char        LT      LT    GN      GN    GN      GN    GN      GN    GN
Avg clouds    FW SC SC   SC FW FW SC   B1 SC B1 B2   B1 B1 B1 B2   B1 SC SC
PoP 12hr          5       5     5       5    10      20    20      20    10
Snow                                             S    S  S  S  S

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



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