Point Forecast Matrices
Issued by NWS Great Falls, MT
Issued by NWS Great Falls, MT
360 FOUS55 KTFX 152135 PFMTFX Point Forecast Matrices National Weather Service Great Falls MT 335 PM MDT Tue Sep 15 2026 MTZ312-161000- Great Falls-Cascade MT 47.47N 111.38W Elev. 3663 ft 335 PM MDT Tue Sep 15 2026 Date 09/15/26 Wed 09/16/26 Thu 09/17/26 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 43 62 42 72 50 Temp 62 55 50 46 43 46 54 61 62 52 47 45 42 47 64 71 70 59 54 52 50 Dewpt 42 43 43 42 43 43 43 43 43 43 41 42 41 41 47 46 48 48 48 48 48 RH 48 64 77 86100 89 66 51 50 71 79 89 96 79 54 41 45 67 80 86 93 Wind dir NE NE N N NW NW N NE NE NE SE S S S E NE NE N SW SW SW Wind spd 13 12 6 6 5 4 3 4 5 4 3 3 3 2 3 10 10 4 4 3 3 Clouds B1 B2 B1 SC B2 B2 SC SC FW FW FW SC B1 FW FW FW B1 B1 B1 B1 SC PoP 12hr 10 5 0 0 40 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain C C C C S Date 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon 09/21/26 Tue 09/22/26 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 51 70 48 74 48 77 49 72 Temp 64 66 54 51 64 68 54 49 66 71 54 49 70 73 55 49 65 68 Dewpt 51 50 51 49 50 46 45 44 46 43 42 40 43 43 40 40 43 43 PWind dir W W SW SW SW SE SW SW W Wind char LT LT LT LT LT LT LT LT LT Avg clouds SC B1 B2 B1 B1 B1 FW FW FW FW FW FW FW FW FW SC SC FW PoP 12hr 50 70 40 10 5 0 0 0 5 Rain S C C C Rain shwrs C L Tstms S C $$ MTZ303-161000- Cut Bank-Glacier MT 48.60N 112.39W Elev. 3838 ft 335 PM MDT Tue Sep 15 2026 Date 09/15/26 Wed 09/16/26 Thu 09/17/26 Fri MDT 3hrly 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 43 58 39 68 47 Temp 53 48 46 43 43 45 51 56 58 48 45 41 39 43 57 66 67 54 51 48 47 Dewpt 42 43 44 43 43 44 43 42 42 42 42 40 39 41 45 46 48 47 46 46 45 RH 66 83 93100100 96 74 59 55 80 89 96100 93 64 48 50 77 83 93 93 Wind dir E NE N N N N N SE SE SE S S S SE SE E E E NW NW NW Wind spd 9 8 6 6 6 5 3 2 5 6 6 4 2 2 4 6 8 2 2 2 3 Clouds OV OV OV B2 B2 B1 SC FW FW FW FW SC OV FW FW FW FW B1 B1 B1 SC PoP 12hr 60 20 0 0 20 QPF 12hr 0.06 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain S C C C S S S Date 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon 09/21/26 Tue 09/22/26 MDT 6hrly 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 68 47 68 47 71 45 72 46 66 Temp 62 65 52 48 62 66 51 47 64 68 51 46 66 69 51 46 60 63 Dewpt 49 48 47 45 48 46 45 43 46 45 42 40 44 44 41 40 44 44 PWind dir NW NW W SW SW SW SW SW NW Wind char LT LT LT LT LT LT LT LT LT Avg clouds SC B1 B1 SC SC FW FW FW FW FW CL FW FW SC SC SC SC SC PoP 12hr 10 20 10 5 0 0 0 0 0 Rain S S $$ MTZ319-161000- Helena-Lewis & Clark MT 46.61N 111.96W Elev. 3893 ft 335 PM MDT Tue Sep 15 2026 Date 09/15/26 Wed 09/16/26 Thu 09/17/26 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 44 67 44 78 50 Temp 67 57 53 48 46 49 57 65 65 54 50 47 45 50 64 76 77 63 58 52 50 Dewpt 34 40 42 42 43 42 42 42 40 40 41 41 41 41 44 46 49 48 49 47 47 RH 29 53 66 80 89 77 57 43 40 59 71 79 86 71 48 34 37 58 72 83 89 Wind dir N NW W W W NW NW N N W N N N N E E NE W W N N Wind spd 8 13 11 8 6 8 6 8 9 6 0 0 0 0 3 5 6 8 3 0 0 Wind gust 19 Clouds SC B1 SC SC B1 B1 FW FW FW FW SC SC SC FW FW FW B2 B2 SC SC B1 PoP 12hr 5 5 0 0 70 QPF 12hr 0 0 0 0 0.02 Snow 12hr 00-00 00-00 00-00 Rain L C Rain shwrs L Tstms S Date 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon 09/21/26 Tue 09/22/26 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 50 72 48 76 47 77 48 75 Temp 66 67 56 50 65 69 55 48 67 73 55 47 69 74 55 48 67 71 Dewpt 51 49 49 47 48 43 43 42 44 38 39 39 41 37 38 39 40 37 PWind dir NW W W W W SW S SW W Wind char LT LT LT LT LT LT LT LT LT Avg clouds B1 B2 B2 B1 B1 B1 FW FW FW CL CL FW FW FW FW SC SC FW PoP 12hr 80 70 40 10 5 0 0 0 5 Rain C C C Rain shwrs D L C Tstms C C S $$ MTZ326-161000- Bozeman-Gallatin MT 45.78N 111.16W Elev. 4475 ft 335 PM MDT Tue Sep 15 2026 Date 09/15/26 Wed 09/16/26 Thu 09/17/26 Fri MDT 3hrly 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 38 71 40 77 47 Temp 69 55 47 42 39 45 57 68 70 56 48 44 42 49 66 76 74 61 55 50 48 Dewpt 39 38 40 40 38 40 43 43 44 44 43 44 42 43 49 51 51 52 50 48 47 RH 33 53 76 93 96 82 59 40 39 64 83100100 80 54 42 44 72 83 93 96 Wind dir E SE W N N N NW NW E E E E SE E W S SE SE SE SE N Wind spd 6 10 3 0 0 0 3 4 4 8 9 5 2 2 2 2 4 9 5 4 0 Clouds SC SC B1 SC FW FW FW FW FW FW SC B1 B2 B1 SC SC B1 B1 SC SC B1 PoP 12hr 0 0 0 20 30 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain S C C Rain shwrs S C Tstms S S Obvis PF F F Date 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon 09/21/26 Tue 09/22/26 MDT 6hrly 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 74 44 71 42 74 41 77 43 76 Temp 64 66 50 47 63 69 50 44 66 72 50 44 68 75 52 46 67 73 Dewpt 50 49 49 47 49 44 44 41 44 39 40 36 40 39 38 36 39 39 PWind dir SW SW SW SE SW E SW SE SW Wind char LT LT LT LT LT LT LT LT LT Avg clouds B1 B2 B2 B1 B1 B1 SC FW FW CL CL FW FW FW FW SC SC FW PoP 12hr 70 80 40 20 5 0 0 0 5 Rain C C C S Rain shwrs L D C Tstms S C S $$ MTZ330-161000- West Yellowstone-Gallatin MT 44.69N 111.11W Elev. 6644 ft 335 PM MDT Tue Sep 15 2026 Date 09/15/26 Wed 09/16/26 Thu 09/17/26 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 28 74 37 71 38 Temp 62 48 38 32 28 41 65 72 70 54 45 41 39 46 66 70 65 54 47 43 39 Dewpt 24 28 28 28 26 30 35 34 37 39 40 40 39 43 51 51 49 48 47 43 39 RH 23 46 67 85 92 65 33 25 30 57 82 96100 89 58 51 56 80100100100 Wind dir SW N N N N N N SW SW NE NE N N N S S S S SE N N Wind spd 9 0 0 0 0 0 0 4 1 1 1 0 0 0 1 8 4 2 1 0 0 Wind gust 18 14 Clouds CL FW FW FW FW FW FW FW SC SC B1 B2 B2 B1 B2 B2 B2 B2 B1 B2 B2 PoP 12hr 0 5 30 70 60 QPF 12hr 0 0 0 0.04 0.02 Snow 12hr 00-00 00-00 00-00 Rain C C C L C C L Rain shwrs L L L Tstms S C S Obvis PF PF Date 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon 09/21/26 Tue 09/22/26 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 66 32 64 30 68 29 71 31 70 Temp 61 57 40 35 59 61 40 31 62 65 40 29 64 67 42 32 65 66 Dewpt 48 41 40 35 42 36 37 31 38 30 32 29 35 28 30 28 34 29 PWind dir SW SW W W N N SW SW SW Wind char LT LT LT LT LT LT LT LT LT Avg clouds B2 B2 B1 B2 B2 B1 SC SC FW CL FW FW SC FW SC SC SC FW PoP 12hr 70 40 40 5 5 0 0 0 5 Rain L C S Rain shwrs L C C Tstms C S S $$ MTZ328-161000- Dillon-Beaverhead MT 45.26N 112.55W Elev. 5357 ft 335 PM MDT Tue Sep 15 2026 Date 09/15/26 Wed 09/16/26 Thu 09/17/26 Fri MDT 3hrly 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 37 72 42 77 46 Temp 69 55 49 44 39 44 60 70 70 55 49 45 43 48 66 76 73 59 53 48 46 Dewpt 32 31 33 35 34 36 39 38 40 40 41 40 40 41 47 48 50 48 48 46 45 RH 25 40 54 70 82 73 46 31 33 57 74 82 89 77 50 37 44 67 83 93 96 Wind dir E SE N S S NE N NE NE NE SE S S S N S S S S S S Wind spd 6 9 6 4 4 3 4 8 10 5 3 3 3 2 2 5 12 9 6 5 6 Wind gust 21 23 Clouds CL B2 B2 B1 FW CL CL FW FW FW B1 B1 B1 B1 B1 B1 B1 B1 SC SC B1 PoP 12hr 0 0 10 30 40 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain C C C C S S C Rain shwrs C C Tstms S S Date 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon 09/21/26 Tue 09/22/26 MDT 6hrly 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 72 42 71 41 74 41 77 42 75 Temp 64 64 48 43 64 68 50 42 66 72 50 42 68 74 51 43 68 72 Dewpt 48 45 45 43 45 41 40 38 41 35 35 34 37 34 34 33 37 35 PWind dir S SW W S SW S SW S SW Wind char LT LT LT LT LT LT LT LT LT Avg clouds B1 B2 B1 B2 B1 SC FW FW FW CL CL FW SC FW FW B1 SC FW PoP 12hr 70 50 20 5 0 0 0 0 5 Rain C C S S Rain shwrs L C Tstms S S $$ MTZ305-161000- Havre-Hill MT 48.54N 109.76W Elev. 2585 ft 335 PM MDT Tue Sep 15 2026 Date 09/15/26 Wed 09/16/26 Thu 09/17/26 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 44 65 42 75 49 Temp 61 53 50 47 44 49 59 64 63 51 46 44 42 49 67 74 72 59 54 51 49 Dewpt 42 40 43 44 44 45 45 42 44 43 43 43 42 43 48 48 50 48 50 49 49 RH 49 61 77 89100 86 60 45 50 74 89 96100 80 50 40 46 67 86 93100 Wind dir E E E NE NE NE N N NE E E E E E E E E E E SE N Wind spd 16 16 14 12 10 8 5 4 3 5 6 6 6 6 8 9 12 11 5 2 0 Clouds OV OV OV OV B2 B1 B1 SC FW FW FW SC B1 FW FW CL FW SC SC B1 SC PoP 12hr 40 5 0 0 10 QPF 12hr 0.02 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain S C C Date 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon 09/21/26 Tue 09/22/26 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 49 71 48 74 47 78 48 74 Temp 68 69 54 51 67 68 52 48 68 71 52 48 70 73 55 48 67 70 Dewpt 53 52 53 51 53 50 49 48 50 48 47 45 47 47 44 43 46 47 PWind dir NW NE N SE SW SE SW S NW Wind char LT LT LT LT LT LT LT LT LT Avg clouds SC SC B1 B2 B2 B1 SC FW FW FW FW FW FW FW SC SC SC SC PoP 12hr 20 50 40 20 5 5 0 0 5 Rain S C C S Rain shwrs C C Tstms S S $$ MTZ314-161000- Lewistown-Fergus MT 47.05N 109.46W Elev. 4144 ft 335 PM MDT Tue Sep 15 2026 Date 09/15/26 Wed 09/16/26 Thu 09/17/26 Fri MDT 3hrly 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 40 64 42 76 50 Temp 63 53 49 43 40 45 54 62 62 50 46 44 42 50 68 75 73 59 55 53 51 Dewpt 38 39 39 38 38 40 42 42 42 42 42 42 41 43 48 47 47 46 47 46 45 RH 39 59 68 82 92 82 64 48 48 74 86 93 96 77 49 37 40 62 74 77 80 Wind dir SE E E E W W NW NW NE E SE SE SE SE SE E SE SE SE S SW Wind spd 11 16 13 2 2 5 6 6 5 9 8 8 5 4 4 5 5 6 3 2 1 Wind gust 26 24 Clouds FW SC B1 B2 SC SC SC FW FW FW FW FW SC FW FW FW SC B1 SC SC SC PoP 12hr 0 0 0 0 10 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Date 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon 09/21/26 Tue 09/22/26 MDT 6hrly 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 73 48 67 47 71 47 76 48 73 Temp 67 61 51 50 61 65 51 48 65 69 50 49 71 72 53 50 69 69 Dewpt 51 51 51 48 50 46 46 43 45 42 42 39 40 41 39 37 40 41 PWind dir NW W W S W SE SW S W Wind char LT LT LT LT LT LT LT LT LT Avg clouds SC B2 OV B2 B2 B2 B1 SC SC FW CL FW FW FW FW SC SC FW PoP 12hr 60 80 60 30 20 5 0 0 5 Rain L C S Rain shwrs L D L L Tstms S C S S $$ 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