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Issued by NWS Great Falls, MT

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Point Forecast Matrices
National Weather Service Great Falls MT
759 AM MST Fri Dec 15 2017

MTZ012-152300-
Great Falls-Cascade MT
47.47N 111.38W Elev. 3663 ft
759 AM MST Fri Dec 15 2017

Date                Fri 12/15/17            Sat 12/16/17            Sun 12/17/17
MST 3hrly     02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17
UTC 3hrly     09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00

Max/Min                      48          23          35          21          38
Temp                42 47 45 40 33 30 27 25 24 30 34 26 21 21 23 24 26 32 38 32
Dewpt               30 34 33 30 27 27 24 23 22 24 22 19 16 14 13 12 14 15 19 15
RH                  62 60 62 67 78 88 88 92 92 78 61 74 81 74 65 60 60 49 46 49
Wind dir            SW SW SW  W NW NW  N NW  W  W NW  W SW SW SW SW SW SW SW SW
Wind spd            25 26 21 16 10 10  9 10  8  8  9  8 10 13 16 18 18 23 21 25
Wind gust           35 36 32                                           33 32
Clouds              B2 OV OV OV OV OV OV OV OV B2 B2 B1 SC FW FW SC SC B1 SC B2
PoP 12hr                     10          90          40           5           5
QPF 12hr                      0        0.24        0.04           0           0
Snow 12hr                 00-00           2           1
Rain                          L
Snow                             D  D  D  C  C  C  C                          S
Obvis                                       PF


Date               Mon 12/18/17  Tue 12/19/17  Wed 12/20/17  Thu 12/21/17
MST 6hrly     23   05 11 17 23   05 11 17 23   05 11 17 23   05 11 17
UTC 6hrly     06   12 18 00 06   12 18 00 06   12 18 00 06   12 18 00

Min/Max            31    40      28    42      27    32      10    26
Temp          40   36 40 34 32   28 38 41 41   31 27 16 11   12 24 24
Dewpt         25   24 34 26 26   24 31 27 26   17 12  7  5    7  9 11
PWind dir          SW     W      SW    SW       S    NW      NW     W
Wind char          WY    BZ      GN    BZ      BZ    BZ      BZ    BZ
Avg clouds    B2   B2 B2 B2 B2   B2 B2 B2 B2   B2 B2 B2 B2   B2 SC B1
PoP 12hr           30    30      30    30      30    50      30    10
Rain                   C  C             C  C    C
Snow           S    C  C  C  S    C  C  C  C    C  C  C  C    C

$$
MTZ010-152300-
Cut Bank-Glacier MT
48.60N 112.39W Elev. 3838 ft
759 AM MST Fri Dec 15 2017

Date                Fri 12/15/17            Sat 12/16/17            Sun 12/17/17
MST 3hrly     02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17
UTC 3hrly     09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00

Max/Min                      44          19          33          19          39
Temp                40 41 40 30 28 24 24 22 20 27 32 20 19 19 20 22 23 36 39 34
Dewpt               29 31 30 24 24 21 20 19 17 21 19 14 13 11 11 12 15 20 22 20
RH                  64 67 67 78 85 88 84 88 88 78 58 77 77 70 67 65 71 52 50 56
Wind dir             W  W  W NW  N NW NW NW NW  W  W SW SW SW SW SW SW  W  W  W
Wind spd            35 28 18 16 14 12 10  8  8 10 12 11 12 14 18 19 18 23 20 20
Wind gust           49 40                                              33    32
Clouds              B2 OV OV OV OV OV OV B2 B2 B2 B1 SC FW FW FW SC SC B1 SC B2
PoP 12hr                     60         100          30           5          10
QPF 12hr                   0.02        0.14        0.02           0           0
Snow 12hr                 00-00           2           T
Rain                       C
Snow                       C  D  D  C  C  C  C  C  C                          S


Date               Mon 12/18/17  Tue 12/19/17  Wed 12/20/17  Thu 12/21/17
MST 6hrly     23   05 11 17 23   05 11 17 23   05 11 17 23   05 11 17
UTC 6hrly     06   12 18 00 06   12 18 00 06   12 18 00 06   12 18 00

Min/Max            26    36      23    36      20    28       8    25
Temp          34   26 36 30 26   24 35 32 30   21 26 14  8   12 25 17
Dewpt         23   19 31 20 18   21 28 29 23   12 20 11 -1    2 11  7
PWind dir           W     W       W    SW      SW    NW      NW     W
Wind char          BZ    BZ      BZ    BZ      BZ    BZ      BZ    BZ
Avg clouds    B1   B2 B2 B2 B2   B2 B2 OV OV   B2 B2 B2 B2   B1 SC B1
PoP 12hr           30    30      30    40      40    40      30    10
Snow           S    C  C  S  S    C  C  C  C    C  C  C  C    S

$$
MTZ014-152300-
Helena-Lewis & Clark MT
46.61N 111.96W Elev. 3893 ft
759 AM MST Fri Dec 15 2017

Date                Fri 12/15/17            Sat 12/16/17            Sun 12/17/17
MST 3hrly     02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17
UTC 3hrly     09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00

Max/Min                      30          17          34          15          35
Temp                18 25 30 25 23 21 19 22 19 29 31 29 21 15 16 16 16 28 35 26
Dewpt               17 24 27 23 21 19 18 20 17 24 20 21 17 11 12 13 12 18 20 16
RH                  96 96 88 92 92 92 96 92 92 81 63 72 84 84 84 88 84 66 54 65
Wind dir            SW  W  S SW SW  W  W NW NW NW NW  W  W SW SW SW SW SW SW SW
Wind spd             3  3  3  3  4  4  4  5  4  5  6  3  3  3  4  4  4  6  9  4
Clouds              B2 B2 B2 B2 OV OV OV OV B2 B2 B2 SC SC FW FW SC SC B1 B1 B2
PoP 12hr                      0          90          40          10          20
QPF 12hr                      0        0.08        0.03           0           0
Snow 12hr                 00-00           1           1
Snow                          S  C  D  D  C  C  C  C                    S  S  S
Obvis                                 PF PF


Date               Mon 12/18/17  Tue 12/19/17  Wed 12/20/17  Thu 12/21/17
MST 6hrly     23   05 11 17 23   05 11 17 23   05 11 17 23   05 11 17
UTC 6hrly     06   12 18 00 06   12 18 00 06   12 18 00 06   12 18 00

Min/Max            24    38      27    40      25    28       5    22
Temp          26   27 37 36 31   27 34 40 32   27 25 17  6    9 18 22
Dewpt         20   22 26 23 26   23 23 26 25   22 15  5  0    6  8 11
PWind dir          SW     W      SW    SW      SW     W       N     W
Wind char          LT    GN      LT    LT      GN    GN      GN    LT
Avg clouds    B2   B2 B2 B2 B2   B2 B2 B2 B2   B2 B2 B2 B2   B2 B1 B1
PoP 12hr           30    30      20    30      30    40      30    10
Rain                                    S  S
Snow           S    C  C  S  S    S  C  S  S    C  C  C  C    C

$$
MTZ055-152300-
Bozeman-Gallatin MT
45.78N 111.16W Elev. 4475 ft
759 AM MST Fri Dec 15 2017

Date                Fri 12/15/17            Sat 12/16/17            Sun 12/17/17
MST 3hrly     02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17
UTC 3hrly     09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00

Max/Min                      31          21          32           6          29
Temp                11 25 30 28 24 24 24 26 22 27 30 26 15 12  8  6 10 18 29 22
Dewpt               11 23 28 25 21 22 21 23 19 21 21 21 12  9  6  4  6  7 17 13
RH                 100 92 92 88 88 92 88 88 88 78 69 81 88 87 91 91 83 61 60 68
Wind dir             S  S SW SW SW SW  W  W NW NW NW NW  W SW  S  S SW SW SW SW
Wind spd             3  4  5  5  5  4  4  4  3  4  4  3  3  3  3  4  4  4  5  5
Clouds              B1 B1 B1 OV OV OV OV OV OV B2 B2 B2 B2 SC FW SC SC SC B1 B2
PoP 12hr                      0         100          60          20          10
QPF 12hr                      0        0.15        0.08           0           0
Snow 12hr                 00-00           2           2
Snow                          S  C  D  D  L  L  C  C  S  S                    S
Obvis                                 PF    PF
Wind chill                                                       -3
Min chill                                                        -3    -3
Winter Weath                        Y  Y  Y  Y  Y  Y


Date               Mon 12/18/17  Tue 12/19/17  Wed 12/20/17  Thu 12/21/17
MST 6hrly     23   05 11 17 23   05 11 17 23   05 11 17 23   05 11 17
UTC 6hrly     06   12 18 00 06   12 18 00 06   12 18 00 06   12 18 00

Min/Max            18    35      23    37      23    30       4    18
Temp          20   23 30 35 28   23 34 37 33   24 29 21  6    6 14 17
Dewpt         13   18 17 23 21   19 25 23 25   18 16  9  0    2  4  7
PWind dir          SW    SW      SW    SW      SW    SW       W     W
Wind char          LT    LT      LT    LT      LT    LT      LT    LT
Avg clouds    B2   B2 OV OV OV   B2 OV B2 OV   B2 B2 B2 B2   B2 B2 B1
PoP 12hr           30    40      40    30      30    60      40    20
Rain                                    C  C    C
Snow           S    C  C  C  C    C  C  C  C    C  C  L  C    C  S  S

$$
MTZ055-152300-
West Yellowstone-Gallatin MT
44.66N 111.11W Elev. 6700 ft
759 AM MST Fri Dec 15 2017

Date                Fri 12/15/17            Sat 12/16/17            Sun 12/17/17
MST 3hrly     02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17
UTC 3hrly     09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00

Max/Min                      26           6          26           3          19
Temp                13 19 25 22 19 18 13  7 12 20 26 22 12  7  3  5  3 14 19 15
Dewpt               12 18 24 21 18 17 12  4 11 16 18 17  8  4  1  4  2  9 10 11
RH                  96 96 96 96 96 96 96 87 96 84 71 81 84 87 91 95 95 80 67 84
Wind dir            SW  S SW  S  S SW SW SW  W  N  N  N  N  N NW  S  S SW SW SW
Wind spd             3  5  6  5  4  4  4  3  4  3  5  4  3  3  3  2  3  4  5  5
Clouds              SC SC B1 B2 OV OV OV OV OV B2 B2 B2 B1 SC FW SC SC SC SC B1
PoP 12hr                      5          90          70          20          10
QPF 12hr                      0        0.11        0.07           0           0
Snow 12hr                 00-00           2           1
Snow                          S  S  D  D  L  L  C  C  S  S                    S
Obvis                F                      PF
Wind chill                                                    -4    -4
Min chill                                                        -4    -4
Winter Weath                        Y  Y  Y  Y  Y  Y


Date               Mon 12/18/17  Tue 12/19/17  Wed 12/20/17  Thu 12/21/17
MST 6hrly     23   05 11 17 23   05 11 17 23   05 11 17 23   05 11 17
UTC 6hrly     06   12 18 00 06   12 18 00 06   12 18 00 06   12 18 00

Min/Max             6    22      11    28      14    26      -5    15
Temp           6    8 16 22 13   12 20 28 18   15 25 22  2   -5  7 14
Dewpt          3    5 11 15 10   10 16 20 15   13 22 13 -1   -7  1  6
PWind dir          SW    SW      SW    SW      SW    SW      NW     E
Wind char          LT    LT      LT    GN      GN    GN      LT    LT
Avg clouds    B1   B2 B2 OV OV   OV OV B2 B2   B2 B2 B2 B2   B2 B1 B1
PoP 12hr           20    40      40    40      30    50      40    20
Snow           S    S  C  C  C    C  C  C  C    C  C  C  C    C  S  S

$$
MTZ008-152300-
Dillon-Beaverhead MT
45.26N 112.55W Elev. 5357 ft
759 AM MST Fri Dec 15 2017

Date                Fri 12/15/17            Sat 12/16/17            Sun 12/17/17
MST 3hrly     02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17
UTC 3hrly     09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00

Max/Min                      37          19          30           8          29
Temp                23 30 36 30 26 26 23 25 21 27 28 20 16 11  9  8  9 19 29 20
Dewpt               22 28 33 25 21 21 18 20 17 17 13 11  8  5  4  3  3  6 12  8
RH                  96 92 89 81 81 81 81 81 84 65 53 67 70 76 80 79 76 56 48 59
Wind dir             S  S  S  S  S  S  S  W  W NW NW NW  N SW SW  S SW SW SW SW
Wind spd            11 11 10 11 10  8  9  8  6  9  8  6  6  6  8  9  8  8  6  8
Clouds              SC B1 B1 B2 B2 OV OV OV B2 B1 B1 B1 SC SC FW SC SC SC B1 B2
PoP 12hr                      0          80          40          10          10
QPF 12hr                      0        0.07        0.03           0           0
Snow 12hr                 00-00           1           1
Snow                                L  L  C  C  C  C
Wind chill                                                    -3 -5 -3
Min chill                                                        -5    -4


Date               Mon 12/18/17  Tue 12/19/17  Wed 12/20/17  Thu 12/21/17
MST 6hrly     23   05 11 17 23   05 11 17 23   05 11 17 23   05 11 17
UTC 6hrly     06   12 18 00 06   12 18 00 06   12 18 00 06   12 18 00

Min/Max            20    36      23    38      24    32       6    20
Temp          21   24 33 36 27   24 34 38 31   24 32 20 10    6 18 17
Dewpt         12   16 17 21 18   18 22 21 22   17 16  6  3    1  6  3
PWind dir          SW     S      SW     S       S    SW       W     W
Wind char          GN    GN      GN    GN      GN    GN      GN    GN
Avg clouds    B2   B2 B2 B2 B2   B2 B2 B2 B2   B2 B2 B2 B2   B2 B2 B1
PoP 12hr           20    20      20    20      30    50      30    20
Snow                S  S  S  S    S  S  S  S    C  C  C  C    C  S  S

$$
MTZ011-152300-
Havre-Hill MT
48.54N 109.76W Elev. 2585 ft
759 AM MST Fri Dec 15 2017

Date                Fri 12/15/17            Sat 12/16/17            Sun 12/17/17
MST 3hrly     02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17
UTC 3hrly     09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00

Max/Min                      45          23          37          16          40
Temp                34 42 45 37 30 29 27 25 23 33 36 29 21 17 17 18 19 33 40 34
Dewpt               27 34 36 31 27 26 24 22 19 24 21 19 15 12 12 11 14 18 22 22
RH                  75 73 70 79 88 88 88 88 84 69 54 66 77 80 80 73 80 53 48 61
Wind dir            SW  W  W NW NW  W  W  W SW  W  W  W SW SW SW SW SW SW SW SW
Wind spd            20 27 19 13 11 10 10  9  8 10 10  9  6  8 10 11 11 16 17 12
Wind gust              39
Clouds              B1 B2 OV OV OV OV B2 B2 B2 B1 SC SC FW FW FW FW FW B1 SC B2
PoP 12hr                     30          90          10           5           5
QPF 12hr                   0.01        0.13           0           0           0
Snow 12hr                 00-00           1       00-00
Rain                       C  D
Snow                             D  C  C                                      C


Date               Mon 12/18/17  Tue 12/19/17  Wed 12/20/17  Thu 12/21/17
MST 6hrly     23   05 11 17 23   05 11 17 23   05 11 17 23   05 11 17
UTC 6hrly     06   12 18 00 06   12 18 00 06   12 18 00 06   12 18 00

Min/Max            26    38      21    37      22    31       6    25
Temp          28   29 38 35 25   22 35 34 25   23 31 22  7   11 22 24
Dewpt         21   23 31 24 21   17 23 25 21   16 18 17  2    6  9 11
PWind dir           W     W       W    SW      SE     N      SW     W
Wind char          GN    GN      GN    GN      GN    GN      GN    BZ
Avg clouds    B2   B2 B2 B2 B1   B1 B2 B2 OV   OV OV OV B2   B1 B1 B1
PoP 12hr           40    30      20    30      50    40      30    10
Snow           C    C  C  C  S       S  C  C    C  C  C  C    S

$$
MTZ051-152300-
Lewistown-Fergus MT
47.05N 109.46W Elev. 4144 ft
759 AM MST Fri Dec 15 2017

Date                Fri 12/15/17            Sat 12/16/17            Sun 12/17/17
MST 3hrly     02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17
UTC 3hrly     09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00

Max/Min                      50          25          33          14          37
Temp                36 47 49 42 34 32 30 28 25 26 30 29 20 16 15 14 17 30 37 32
Dewpt               27 36 37 32 29 30 28 26 24 22 20 23 17 11  8  7  9 14 18 18
RH                  69 65 63 67 82 92 92 92 96 85 66 78 88 80 73 73 70 51 46 56
Wind dir             W  W  W  W NW NW NW NW NW NW NW  W  W SW SW SW SW SW SW SW
Wind spd            12 18 16 13 11  9  9  9  9  8  5  6  5  3  6  8 10 10 10 11
Clouds              SC SC B1 B2 OV OV OV OV OV OV B2 B2 B1 FW FW FW FW SC SC B1
PoP 12hr                      5          90          50          10           5
QPF 12hr                      0        0.10        0.03           0           0
Snow 12hr                 00-00           1           1
Rain                          C
Snow                             L  D  D  C  C  C  C


Date               Mon 12/18/17  Tue 12/19/17  Wed 12/20/17  Thu 12/21/17
MST 6hrly     23   05 11 17 23   05 11 17 23   05 11 17 23   05 11 17
UTC 6hrly     06   12 18 00 06   12 18 00 06   12 18 00 06   12 18 00

Min/Max            27    37      23    39      25    31       6    23
Temp          29   36 36 29 25   24 35 39 37   28 28 18  7    8 20 22
Dewpt         20   26 32 27 22   21 24 24 31   13 17 11  4    3  4 15
PWind dir           W     W       W    SW      SW     W      NW     W
Wind char          GN    BZ      GN    GN      GN    GN      GN    GN
Avg clouds    B1   B2 B2 B2 B2   B2 B2 B2 OV   B2 B2 B2 B2   B2 B1 B1
PoP 12hr           30    30      20    30      30    40      30    10
Rain                                    S  C    C
Snow                C  C  C  S    S  C  S  C    C  C  C  C    C

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




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