Point Forecast Matrices
Issued by NWS Great Falls, MT
Issued by NWS Great Falls, MT
421 FOUS55 KTFX 102156 PFMTFX Point Forecast Matrices National Weather Service Great Falls MT 256 PM MST Wed Dec 10 2025 MTZ312-111100- Great Falls-Cascade MT 47.47N 111.38W Elev. 3663 ft 256 PM MST Wed Dec 10 2025 Date Wed 12/10/25 Thu 12/11/25 Fri 12/12/25 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 51 52 2 15 9 Temp 52 53 56 56 56 52 50 39 25 19 16 12 8 6 9 13 13 14 17 17 13 Dewpt 33 38 41 40 41 38 36 25 14 12 9 5 2 0 4 7 7 8 10 10 6 RH 48 57 57 55 57 59 58 57 62 74 73 73 76 76 80 76 76 76 73 73 73 Wind dir SW SW SW SW SW S SE SE E N NE NE NE NE NE NE NE NE NE N N Wind spd 25 27 29 32 28 29 23 18 16 9 10 9 10 10 9 8 8 10 11 10 9 Wind gust 35 39 44 48 43 44 34 Clouds OV OV OV B2 OV OV OV OV OV OV OV OV OV OV OV OV OV OV B2 OV B2 PoP 12hr 20 80 70 80 40 QPF 12hr 0 0.10 0.08 0.11 0.02 Snow 12hr 00-00 T 1 Rain S S S S C C D Snow L L C C C D D C C C C C C S Wind chill -6 -9 -4 Min chill -6 -9 -3 Winter Storm A A A A A A A A A Winter Weath Y Y Y Y Date 12/13/25 Sun 12/14/25 Mon 12/15/25 Tue 12/16/25 Wed 12/17/25 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 25 50 36 52 39 51 35 46 Temp 18 33 35 39 46 45 42 41 48 49 49 44 49 46 42 40 43 40 Dewpt 13 19 21 24 27 28 26 25 28 30 34 30 34 32 29 27 27 24 PWind dir E SW SW SW SW SW SW SW SW Wind char LT GN BZ BZ BZ BZ WY BZ WY Avg clouds B2 B1 B1 B1 B1 B1 B1 B1 B2 SC B1 B1 SC SC SC B1 B1 SC PoP 12hr 20 0 0 0 5 20 20 40 30 Rain S S S S C C Snow S S C C S $$ MTZ303-111100- Cut Bank-Glacier MT 48.60N 112.39W Elev. 3838 ft 256 PM MST Wed Dec 10 2025 Date Wed 12/10/25 Thu 12/11/25 Fri 12/12/25 Sat MST 3hrly 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 36 44 -8 9 1 Temp 47 47 49 47 47 43 39 24 14 8 4 1 -4 -4 1 8 7 6 6 5 3 Dewpt 37 40 42 40 40 37 31 14 7 1 -4 -8 -7 -8 -4 3 2 2 1 -1 -2 RH 68 76 77 76 76 79 73 65 73 72 68 65 86 82 79 79 79 83 79 76 79 Wind dir W W NW NW W NW NW NW N N N N NE NE E E SE E NE N N Wind spd 24 21 20 20 26 26 26 18 12 11 12 10 8 6 9 10 10 10 10 10 9 Wind gust 32 34 36 39 37 36 Clouds B2 B2 OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV PoP 12hr 60 60 60 70 50 QPF 12hr 0.07 0.05 0.01 0.05 0.05 Snow 12hr 00-00 00-00 T Rain C C L L L Snow C C S C S S C L L L L C C C C Wind chill -1 -8-13-16-19-18-14 -7 -9-10 -9-10-11 Min chill -1 -14 -20 -21 -12 -10 -12 High Wind W Winter Storm A A A A A A A A A Date 12/13/25 Sun 12/14/25 Mon 12/15/25 Tue 12/16/25 Wed 12/17/25 MST 6hrly 11 17 23 05 11 17 23 05 11 17 23 05 11 17 23 05 11 17 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 29 18 47 30 48 34 45 28 40 Temp 9 26 26 32 42 40 34 32 42 45 42 39 42 40 35 32 38 35 Dewpt 5 17 16 19 28 29 24 22 29 34 31 29 29 28 25 23 26 25 PWind dir SE SW SW SW SW SW W SW W Wind char GN GN BZ BZ BZ WY WY BZ WY Avg clouds B2 B2 B1 B1 B1 B1 B1 B1 B2 B1 B1 SC SC SC SC B1 B1 SC PoP 12hr 10 0 0 0 5 20 20 30 20 Rain S S S S S C Snow S S S C S S $$ MTZ319-111100- Helena-Lewis & Clark MT 46.61N 111.96W Elev. 3893 ft 256 PM MST Wed Dec 10 2025 Date Wed 12/10/25 Thu 12/11/25 Fri 12/12/25 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 51 52 24 39 28 Temp 51 52 53 55 55 52 51 50 44 39 36 34 29 29 32 38 39 39 37 37 33 Dewpt 36 37 37 38 39 36 36 35 33 31 30 28 24 24 27 31 31 31 28 27 24 RH 56 56 54 53 55 54 56 56 65 73 79 78 81 81 81 76 73 73 70 67 69 Wind dir SW S S S SW W W W W NW N N NW NW NW W SW SW W W W Wind spd 18 18 17 18 18 20 19 18 11 8 6 6 4 4 5 8 9 10 10 9 6 Wind gust 35 37 36 36 37 37 36 32 Clouds OV B2 B1 SC B1 B1 B2 B2 OV OV OV OV OV OV B2 B2 B1 B2 B1 B2 B2 PoP 12hr 20 70 80 60 20 QPF 12hr 0 0.03 0.19 0.06 0 Snow 12hr 00-00 00-00 T Rain S C C L L D S S S S Snow D D D L L C C S S S S Date 12/13/25 Sun 12/14/25 Mon 12/15/25 Tue 12/16/25 Wed 12/17/25 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 44 30 51 32 51 36 49 32 44 Temp 38 42 35 34 42 46 39 36 43 48 44 41 45 45 39 36 38 40 Dewpt 30 27 23 22 27 26 24 23 29 30 31 32 34 31 29 26 28 24 PWind dir SW S S S S S SW SW SW Wind char LT GN GN GN GN GN GN GN GN Avg clouds B2 B1 SC SC SC SC SC B1 B1 SC B1 B1 B1 B1 B1 B1 B1 SC PoP 12hr 10 0 0 0 5 30 40 50 40 Rain C C C C C C S Snow S C C S $$ MTZ326-111100- Bozeman-Gallatin MT 45.78N 111.16W Elev. 4475 ft 256 PM MST Wed Dec 10 2025 Date Wed 12/10/25 Thu 12/11/25 Fri 12/12/25 Sat MST 3hrly 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 42 53 40 47 33 Temp 58 54 51 48 46 46 52 52 50 47 45 45 44 42 44 46 44 41 40 40 37 Dewpt 37 38 36 33 30 31 34 35 38 41 40 41 40 39 39 36 34 31 29 29 27 RH 45 54 56 56 53 55 50 52 63 79 82 86 86 89 82 68 68 67 64 64 67 Wind dir SW SW SW SW SW SW W W W NW W W W W W W SW SW SW W SW Wind spd 14 16 14 13 14 14 16 16 11 9 6 5 5 6 8 10 10 11 10 10 8 Wind gust 27 27 27 28 21 21 Clouds OV B2 B2 B2 B2 B2 OV OV OV OV OV OV OV OV OV B2 B2 B2 B2 OV OV PoP 12hr 10 60 80 50 10 QPF 12hr 0 0.03 0.11 0.05 0 Snow 12hr 00-00 00-00 00-00 Rain C C D D D D C C S S Snow S S S S Date 12/13/25 Sun 12/14/25 Mon 12/15/25 Tue 12/16/25 Wed 12/17/25 MST 6hrly 11 17 23 05 11 17 23 05 11 17 23 05 11 17 23 05 11 17 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 47 27 52 29 51 34 50 31 45 Temp 42 45 32 31 44 46 34 31 43 47 41 39 44 44 37 35 40 40 Dewpt 30 27 22 21 26 24 21 20 27 28 28 29 33 28 27 27 28 24 PWind dir SW SE S S S S SW SW SW Wind char LT LT LT GN LT GN GN GN GN Avg clouds B2 B1 SC SC SC SC SC SC B1 SC B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 5 0 0 0 0 10 30 40 40 Rain C C C C C Snow C C C S $$ MTZ330-111100- West Yellowstone-Gallatin MT 44.69N 111.11W Elev. 6644 ft 256 PM MST Wed Dec 10 2025 Date Wed 12/10/25 Thu 12/11/25 Fri 12/12/25 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 32 38 31 39 22 Temp 38 37 37 35 34 33 37 38 37 35 36 35 33 32 36 39 36 32 30 27 24 Dewpt 34 34 35 33 31 31 32 30 31 31 33 32 31 29 33 34 32 28 27 25 21 RH 85 89 92 92 89 92 82 73 79 85 89 89 92 88 89 82 85 85 88 92 88 Wind dir SW SW SW SW SW SW SW SW SW SW SW SW SW SW SW SW SW SW SW SW SW Wind spd 14 16 14 14 13 13 14 16 12 11 11 9 10 6 9 12 10 11 10 8 5 Wind gust 25 29 27 23 20 23 20 Clouds OV OV B2 B2 B2 B2 B2 B2 OV OV OV OV OV OV B2 B1 B1 B1 B1 B1 B2 PoP 12hr 20 40 70 40 10 QPF 12hr 0 0 0.06 0.03 0 Snow 12hr 00-00 00-00 00-00 Rain S C L L L L C C S S Snow S C S L L C C S Date 12/13/25 Sun 12/14/25 Mon 12/15/25 Tue 12/16/25 Wed 12/17/25 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 39 15 43 16 40 23 38 25 36 Temp 33 34 19 16 34 37 22 18 32 36 29 25 35 36 30 27 33 33 Dewpt 27 25 14 12 21 21 16 13 22 22 23 22 30 27 28 25 27 22 PWind dir SW S S S S SW SW SW SW Wind char LT LT LT LT LT GN GN GN GN Avg clouds B2 SC SC SC SC FW FW SC B1 SC B1 B2 OV B2 B1 B2 B2 B1 PoP 12hr 5 0 0 0 10 30 50 50 50 Snow C C C C C C C $$ MTZ328-111100- Dillon-Beaverhead MT 45.26N 112.55W Elev. 5357 ft 256 PM MST Wed Dec 10 2025 Date Wed 12/10/25 Thu 12/11/25 Fri 12/12/25 Sat MST 3hrly 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 44 52 47 52 34 Temp 52 49 48 47 46 44 51 52 49 47 48 49 49 49 51 52 47 41 40 38 36 Dewpt 34 32 32 31 28 28 34 33 36 37 38 39 39 39 38 34 33 28 28 25 25 RH 50 52 54 53 49 53 52 48 61 68 68 68 68 68 61 50 58 59 62 59 64 Wind dir SW S S S S SW SW SW SW SW SW SW SW SW SW SW SW SW SW SW S Wind spd 19 19 19 19 18 21 21 21 16 14 14 13 13 14 14 16 13 13 13 13 11 Clouds B2 B2 B1 B1 SC B1 B1 B2 OV OV OV OV OV OV B1 SC SC SC SC B1 B1 PoP 12hr 5 10 20 5 5 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain S S Date 12/13/25 Sun 12/14/25 Mon 12/15/25 Tue 12/16/25 Wed 12/17/25 MST 6hrly 11 17 23 05 11 17 23 05 11 17 23 05 11 17 23 05 11 17 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 52 29 51 29 51 33 50 31 46 Temp 46 45 33 31 44 44 33 31 44 45 38 36 46 45 37 34 43 40 Dewpt 29 27 21 20 23 23 20 20 25 25 25 26 32 29 26 25 28 22 PWind dir SW S S S S S SW SW SW Wind char GN GN GN GN GN GN BZ BZ BZ Avg clouds B1 SC SC SC SC SC SC SC SC SC B1 B1 B1 SC B1 B1 B1 SC PoP 12hr 0 0 0 0 0 20 30 30 30 Rain S C C C C Snow S C C C C C S $$ MTZ305-111100- Havre-Hill MT 48.54N 109.76W Elev. 2585 ft 256 PM MST Wed Dec 10 2025 Date Wed 12/10/25 Thu 12/11/25 Fri 12/12/25 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 28 38 -8 4 -5 Temp 43 40 39 35 35 36 35 24 12 7 4 0 -3 -5 -1 3 2 0 0 0 -1 Dewpt 39 38 37 34 33 34 33 16 6 2 -1 -4 -7 -8 -5 -1 -1 -2 -3 -3 -4 RH 86 92 92 96 92 92 92 71 76 79 79 83 82 86 83 83 87 91 87 87 87 Wind dir SW SW NW N E W NW NW NW NW N N N NE NE E E E E NE NE Wind spd 12 11 8 8 9 13 16 18 13 11 10 9 9 9 10 10 11 11 10 9 6 Wind gust 20 24 26 Clouds OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV PoP 12hr 90 80 60 80 80 QPF 12hr 0.39 0.19 0.11 0.10 0.20 Snow 12hr 00-00 00-00 2 Rain D D D D D L Snow C S C C C C L L D D D D L L S Wind chill -3 -8-11-15-19-21-17-12-15-17-16-15-14 Min chill -3 -12 -19 -21 -15 -17 -16 Winter Storm A A A A A A A A A Winter Weath Y Y Y Y Y Date 12/13/25 Sun 12/14/25 Mon 12/15/25 Tue 12/16/25 Wed 12/17/25 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 12 0 43 28 45 31 45 25 40 Temp 6 8 5 16 37 39 34 31 40 42 39 36 41 40 33 31 37 35 Dewpt 3 4 2 11 27 28 26 24 28 29 31 29 32 30 26 25 26 25 PWind dir E E SW SW SW SW SW SW SW Wind char LT LT GN GN GN BZ BZ GN BZ Avg clouds OV B2 B2 B1 B2 B1 B1 B1 B1 B1 B1 B1 B1 SC B1 B1 B1 B1 PoP 12hr 20 0 0 0 5 5 10 30 20 Rain S C S S Snow S S C S S $$ MTZ314-111100- Lewistown-Fergus MT 47.05N 109.46W Elev. 4144 ft 256 PM MST Wed Dec 10 2025 Date Wed 12/10/25 Thu 12/11/25 Fri 12/12/25 Sat MST 3hrly 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 42 49 15 18 6 Temp 44 44 46 48 47 47 47 40 28 25 23 23 20 17 15 15 15 14 17 16 12 Dewpt 34 34 36 36 34 36 37 36 23 21 20 18 17 15 13 12 12 11 12 11 8 RH 68 68 68 63 60 65 68 85 81 84 88 81 88 92 92 88 88 88 80 80 84 Wind dir W W W W W W W W W NW NW NW NW N E E E E E NW NW Wind spd 18 18 18 19 19 21 24 18 11 8 6 9 6 4 3 4 5 5 5 5 5 Wind gust 28 33 34 35 35 28 Clouds OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV B2 OV OV PoP 12hr 60 90 90 100 60 QPF 12hr 0.01 0.28 0.14 0.36 0.18 Snow 12hr 00-00 T 2 Rain L C C S C C D D Snow D L C L L D D D D L L C C S Winter Storm A A A A A A A A A Winter Weath Y Y Y Y Date 12/13/25 Sun 12/14/25 Mon 12/15/25 Tue 12/16/25 Wed 12/17/25 MST 6hrly 11 17 23 05 11 17 23 05 11 17 23 05 11 17 23 05 11 17 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 34 23 48 32 50 35 48 30 44 Temp 22 27 31 39 46 43 39 36 46 46 45 41 46 44 39 37 42 39 Dewpt 17 16 19 24 30 27 27 25 30 30 31 31 32 31 29 26 28 24 PWind dir SW S SW SW SW SW SW SW SW Wind char LT GN GN GN GN GN GN GN BZ Avg clouds OV B1 SC SC B1 B1 B1 B1 B1 SC B1 B1 B1 SC B1 B1 B1 SC PoP 12hr 20 0 0 0 0 5 20 30 30 Rain S S C C Snow S S S C C $$ http://www.weather.gov/greatfalls