Point Forecast Matrices
Issued by NWS Great Falls, MT
Issued by NWS Great Falls, MT
030 FOUS55 KTFX 172135 PFMTFX Point Forecast Matrices National Weather Service Great Falls MT 335 PM MDT Mon Aug 17 2026 MTZ312-181000- Great Falls-Cascade MT 47.47N 111.38W Elev. 3663 ft 335 PM MDT Mon Aug 17 2026 Date 08/17/26 Tue 08/18/26 Wed 08/19/26 Thu 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 52 83 53 86 54 Temp 78 67 61 57 54 61 76 81 80 68 62 56 54 62 79 84 84 72 64 59 55 Dewpt 46 48 48 48 47 48 46 40 40 44 45 43 42 42 40 37 36 39 39 38 38 RH 32 50 62 72 77 62 34 23 24 42 54 62 64 48 25 19 18 30 40 45 53 Wind dir N E SE SW SW SW W W W S SW SW SW SW W W W SW S S SW Wind spd 9 5 3 4 4 4 4 6 5 5 8 9 9 9 10 8 6 4 4 5 5 Wind gust 17 Clouds B1 SC SC SC SC FW SC SC B1 SC FW FW SC CL CL CL FW SC SC FW FW PoP 12hr 20 20 10 0 0 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S S Tstms S S S Obvis K K K K K K K K K K K K Date 08/20/26 Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 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 84 55 85 59 87 57 83 54 82 Temp 77 83 66 56 76 83 69 60 80 82 66 59 77 80 63 54 75 80 Dewpt 46 43 45 46 48 47 49 50 51 49 50 48 44 39 42 42 43 39 PWind dir W NE NW E SW SW SW W W Wind char LT GN LT GN LT GN GN LT LT Avg clouds FW FW FW SC FW SC SC B1 B1 B1 B1 SC FW FW FW FW FW FW PoP 12hr 0 0 0 20 30 40 20 10 5 Rain shwrs S S C C S S $$ MTZ303-181000- Cut Bank-Glacier MT 48.60N 112.39W Elev. 3838 ft 335 PM MDT Mon Aug 17 2026 Date 08/17/26 Tue 08/18/26 Wed 08/19/26 Thu MDT 3hrly 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 48 77 51 82 51 Temp 73 63 55 51 49 56 72 76 75 64 58 53 52 60 75 80 80 67 59 53 52 Dewpt 47 49 49 47 46 47 46 41 41 45 44 41 40 42 41 40 40 42 41 41 42 RH 40 60 80 86 89 72 39 28 29 50 59 64 63 51 29 24 24 40 51 64 69 Wind dir N SW W W NW W SW NW NW SW W W W W W W W W W W NW Wind spd 8 4 3 3 2 2 5 10 9 6 9 9 9 9 11 12 12 8 8 6 8 Wind gust 20 21 23 Clouds B1 B1 SC SC B1 SC SC SC SC FW CL FW SC FW FW FW FW SC SC SC SC PoP 12hr 50 20 10 0 0 QPF 12hr 0.01 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C S S Tstms C S S Obvis K K K K K K K K K K K K K Date 08/20/26 Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 MDT 6hrly 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 77 50 80 54 80 53 74 49 76 Temp 69 76 59 51 71 79 63 55 73 77 61 55 71 73 56 50 71 75 Dewpt 49 45 46 47 48 46 47 47 50 47 46 44 43 40 43 42 43 39 PWind dir N NE E SE SE SW W W W Wind char GN LT LT GN LT GN BZ GN LT Avg clouds FW FW FW FW FW SC SC B1 B2 SC B1 SC SC FW FW FW FW FW PoP 12hr 0 0 0 20 20 30 20 10 5 Rain shwrs S S S C S S Tstms S $$ MTZ319-181000- Helena-Lewis & Clark MT 46.61N 111.96W Elev. 3893 ft 335 PM MDT Mon Aug 17 2026 Date 08/17/26 Tue 08/18/26 Wed 08/19/26 Thu 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 54 83 51 85 54 Temp 82 70 64 59 55 60 74 81 80 69 62 57 53 58 75 83 84 71 63 57 54 Dewpt 43 45 47 47 46 47 48 43 41 43 44 43 43 43 44 37 35 37 38 38 40 RH 25 41 54 64 72 62 40 26 25 39 52 59 69 57 33 19 17 29 39 49 59 Wind dir NW W W W N N NE NW W W SW SW SW N W W NW W SW SW N Wind spd 10 5 3 1 0 0 3 9 9 5 5 4 3 0 3 10 10 4 4 4 0 Wind gust 19 20 Clouds B2 B1 B1 B1 B1 SC SC SC B2 B2 SC FW SC CL CL FW FW SC SC SC FW PoP 12hr 20 20 10 0 0 QPF 12hr 0 0.02 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S S Tstms S S S Date 08/20/26 Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 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 88 56 88 58 86 56 82 52 83 Temp 76 87 67 56 77 86 68 58 78 81 65 56 75 79 61 52 75 81 Dewpt 42 40 44 46 48 47 51 50 53 51 51 48 48 42 44 43 45 40 PWind dir N NW NE W S SW W W W Wind char LT LT LT LT LT LT LT LT LT Avg clouds FW FW FW SC SC SC B1 B1 B1 B1 B1 SC SC SC FW FW FW FW PoP 12hr 0 0 5 30 40 30 20 10 5 Rain shwrs C S C C S Tstms S S $$ MTZ326-181000- Bozeman-Gallatin MT 45.78N 111.16W Elev. 4475 ft 335 PM MDT Mon Aug 17 2026 Date 08/17/26 Tue 08/18/26 Wed 08/19/26 Thu MDT 3hrly 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 51 80 49 84 51 Temp 76 63 60 56 52 60 73 78 77 63 58 54 50 59 73 81 82 67 61 55 51 Dewpt 49 50 50 49 48 48 49 45 46 49 48 47 46 46 46 41 39 44 43 41 40 RH 39 62 69 77 86 64 43 31 33 60 69 77 86 62 38 24 22 43 51 59 66 Wind dir N SE S S SE SE W NW SW S SE SE S N W W W E SE SE SE Wind spd 8 6 4 3 3 1 3 6 6 4 4 3 2 0 3 5 6 3 4 3 4 Clouds B2 B2 B1 B1 SC FW SC SC B1 B2 B2 FW SC CL CL CL FW FW SC FW FW PoP 12hr 30 30 30 0 0 QPF 12hr 0.02 0.02 0.01 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C S S S C Tstms C S S S C Date 08/20/26 Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 MDT 6hrly 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 88 53 88 55 86 52 83 51 82 Temp 77 85 65 53 80 86 66 56 78 81 63 54 75 80 60 51 74 80 Dewpt 44 39 45 46 47 46 51 51 51 51 54 51 50 45 48 47 47 43 PWind dir NW E NE E S SE SW SE SW Wind char LT LT LT LT LT LT LT LT LT Avg clouds FW FW SC SC SC SC B1 B2 B1 B1 B1 SC SC SC SC SC FW FW PoP 12hr 0 0 0 30 30 40 20 20 10 Rain shwrs C S S C C S S Tstms S S S S $$ MTZ330-181000- West Yellowstone-Gallatin MT 44.69N 111.11W Elev. 6644 ft 335 PM MDT Mon Aug 17 2026 Date 08/17/26 Tue 08/18/26 Wed 08/19/26 Thu 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 75 36 79 39 Temp 68 58 51 45 41 50 69 73 66 57 49 43 38 49 70 78 76 61 52 45 40 Dewpt 45 47 46 44 41 44 45 40 39 45 44 42 38 41 40 34 33 37 37 35 34 RH 43 67 83 96100 80 42 30 37 64 83 96100 74 33 20 21 41 56 68 79 Wind dir SW N N N N N SW SW W N N N N N W W W N N N N Wind spd 5 0 0 0 0 0 4 11 3 0 0 0 0 0 5 10 8 0 0 0 0 Wind gust 17 Clouds B2 OV B2 B2 B1 SC SC B1 B1 B1 SC SC SC FW CL FW FW SC SC SC SC PoP 12hr 60 30 30 0 0 QPF 12hr 0.02 0.08 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs L S S C C C S Tstms C S S C C C S Obvis PF PF Date 08/20/26 Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 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 83 43 84 46 79 43 76 40 75 Temp 76 79 56 44 78 81 57 47 73 72 55 44 70 69 51 40 69 67 Dewpt 41 38 43 40 46 41 47 45 50 48 48 43 47 43 44 40 44 42 PWind dir SW SW SW E SW SW SW SW SW Wind char LT LT LT LT LT LT LT LT LT Avg clouds FW FW SC SC SC SC B1 B2 B2 B1 B1 B1 SC B1 SC SC SC FW PoP 12hr 0 0 20 30 30 20 30 20 20 Rain shwrs S C S S C S S C S S Tstms S S C S C S S $$ MTZ328-181000- Dillon-Beaverhead MT 45.26N 112.55W Elev. 5357 ft 335 PM MDT Mon Aug 17 2026 Date 08/17/26 Tue 08/18/26 Wed 08/19/26 Thu MDT 3hrly 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 49 80 47 83 49 Temp 73 62 58 54 51 56 71 78 74 62 56 52 48 55 71 81 80 65 59 53 50 Dewpt 52 51 49 47 46 48 50 47 51 50 46 45 43 46 47 42 44 44 41 39 38 RH 48 67 72 77 83 74 47 33 44 65 69 77 83 72 42 25 28 46 51 59 63 Wind dir W E S S S SW N NW N SE S S S SW W W W E S S S Wind spd 8 4 4 4 4 3 2 6 6 3 4 4 4 2 2 8 8 4 4 3 4 Wind gust 17 Clouds B2 B2 B2 B1 SC FW SC SC B2 B1 SC FW FW CL CL FW FW SC FW SC FW PoP 12hr 50 20 20 0 0 QPF 12hr 0.01 0.02 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C S S S S Tstms C S S S S Date 08/20/26 Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 MDT 6hrly 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 86 52 86 53 83 50 81 48 80 Temp 76 82 62 53 77 82 62 54 75 77 58 52 73 75 57 49 72 74 Dewpt 48 48 46 44 50 53 53 50 53 54 51 48 50 48 46 44 48 47 PWind dir SW S W SE S S SW SW SW Wind char LT LT LT LT LT GN LT LT LT Avg clouds FW FW SC SC SC SC B1 B2 B2 B1 B1 SC SC SC SC SC FW FW PoP 12hr 0 5 5 40 40 30 20 20 10 Rain shwrs C S C C S S Tstms S S S S $$ MTZ305-181000- Havre-Hill MT 48.54N 109.76W Elev. 2585 ft 335 PM MDT Mon Aug 17 2026 Date 08/17/26 Tue 08/18/26 Wed 08/19/26 Thu 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 84 54 86 54 Temp 78 68 61 55 52 61 75 82 82 70 63 60 56 64 78 84 84 73 65 60 55 Dewpt 47 50 50 48 48 48 49 46 46 48 48 47 45 45 47 43 42 46 45 44 43 RH 33 52 67 77 86 62 40 28 28 45 58 62 66 50 33 24 23 38 48 55 64 Wind dir NW N S S N N E W NW S S SW SW SW W W NW NE S S S Wind spd 6 3 3 1 0 0 2 5 5 4 6 9 10 11 10 9 10 3 3 3 3 Clouds SC B1 SC SC SC FW SC SC SC SC B1 FW SC CL CL FW FW SC SC SC SC PoP 12hr 30 20 20 0 0 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S S S S Tstms S S S S S Obvis K K K K K K K K Date 08/20/26 Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 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 85 54 87 58 89 57 84 54 83 Temp 78 84 63 55 79 85 67 59 81 86 67 59 78 82 63 54 76 81 Dewpt 48 45 47 46 48 46 48 47 50 49 52 48 46 42 46 45 46 41 PWind dir N NE E E SE S W W W Wind char LT LT GN GN GN GN GN LT LT Avg clouds FW FW FW FW FW FW SC B1 B1 B1 B1 B1 SC FW SC FW FW FW PoP 12hr 0 0 0 10 20 40 10 10 5 Rain shwrs S C C Tstms S $$ MTZ314-181000- Lewistown-Fergus MT 47.05N 109.46W Elev. 4144 ft 335 PM MDT Mon Aug 17 2026 Date 08/17/26 Tue 08/18/26 Wed 08/19/26 Thu MDT 3hrly 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 50 79 51 82 52 Temp 75 63 58 55 52 62 75 76 76 64 59 56 52 63 76 81 80 66 60 57 54 Dewpt 48 50 49 47 44 48 47 47 48 49 47 44 40 42 41 41 40 42 41 39 36 RH 38 62 72 74 74 60 37 36 37 58 64 64 63 46 28 24 24 42 49 51 50 Wind dir NW S S SE S N N W NW S S S SW W W NW NW S S S S Wind spd 5 3 3 3 3 0 2 5 3 4 5 5 5 4 8 9 6 3 4 4 3 Clouds B2 B1 SC SC SC SC SC B1 B2 B1 SC FW SC FW CL CL FW FW FW SC SC PoP 12hr 50 30 20 0 0 QPF 12hr 0.02 0.02 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C S S S C S Tstms C S S S C S Obvis K K Date 08/20/26 Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 MDT 6hrly 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 84 53 85 56 86 55 82 52 81 Temp 78 81 61 54 78 82 65 57 80 80 63 57 76 77 59 53 75 77 Dewpt 41 43 46 45 48 48 48 48 51 52 52 49 46 46 46 43 44 45 PWind dir W E E E SE SW W S W Wind char LT LT LT GN LT LT LT LT LT Avg clouds FW CL FW SC SC FW SC B1 B1 SC B2 SC SC SC SC FW FW FW PoP 12hr 0 0 0 20 20 40 20 20 10 Rain shwrs S S C S S $$ http://www.weather.gov/greatfalls