Point Forecast Matrices
Issued by NWS Great Falls, MT
Issued by NWS Great Falls, MT
798 FOUS55 KTFX 170935 PFMTFX Point Forecast Matrices National Weather Service Great Falls MT 335 AM MDT Mon Aug 17 2026 MTZ312-172200- Great Falls-Cascade MT 47.47N 111.38W Elev. 3663 ft 335 AM MDT Mon Aug 17 2026 Date Mon 08/17/26 Tue 08/18/26 Wed 08/19/26 MDT 3hrly 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 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 82 55 83 52 85 Temp 56 62 73 79 79 69 63 59 56 63 77 81 78 67 61 56 53 62 78 83 83 Dewpt 51 52 50 44 45 50 51 50 50 50 47 41 42 47 48 47 45 46 44 41 39 RH 83 70 44 29 30 51 65 72 80 62 35 24 28 49 62 72 74 56 30 23 21 Wind dir SW SW W W NW E E SW SW SW W W N S S SW SW SW W W W Wind spd 5 4 5 6 9 6 4 4 3 3 4 5 5 5 8 9 9 9 10 9 6 Clouds B1 B1 B1 B1 B1 SC SC B1 B1 SC SC FW SC SC FW FW FW FW CL FW FW PoP 12hr 20 20 20 10 0 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S Tstms S S Date Thu 08/20/26 Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 MDT 6hrly 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 54 85 55 88 59 89 57 83 Temp 64 54 77 83 66 56 78 86 69 60 82 85 66 58 77 80 Dewpt 43 40 44 43 46 47 49 47 50 51 52 49 53 50 47 41 PWind dir S W N W E S S SW Wind char LT LT GN LT LT LT GN GN Avg clouds FW FW FW FW FW SC SC SC SC B1 B1 SC B1 B1 SC SC PoP 12hr 0 0 0 0 10 10 50 20 Rain shwrs C S $$ MTZ303-172200- Cut Bank-Glacier MT 48.60N 112.39W Elev. 3838 ft 335 AM MDT Mon Aug 17 2026 Date Mon 08/17/26 Tue 08/18/26 Wed 08/19/26 MDT 3hrly 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 76 50 77 50 79 Temp 52 58 70 74 74 64 57 53 51 58 72 75 76 64 57 52 51 60 74 77 78 Dewpt 50 51 49 45 46 51 50 49 48 49 47 42 41 48 46 43 42 45 40 36 38 RH 93 77 47 35 37 63 77 86 89 72 41 31 28 56 67 71 71 58 29 23 24 Wind dir NW NW SW NW NW NE W NW NW S SW W W SW SW W W W W W W Wind spd 5 3 5 6 10 4 4 4 4 3 6 6 8 4 8 9 9 9 11 12 11 Wind gust 18 18 23 Clouds B1 B1 B1 B2 B1 SC SC SC B2 SC SC SC SC SC FW FW FW FW FW FW FW PoP 12hr 30 20 10 10 0 QPF 12hr 0.06 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C S S S Tstms S Date Thu 08/20/26 Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 MDT 6hrly 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 50 77 51 82 54 82 52 75 Temp 59 51 70 76 59 52 73 81 63 55 74 80 61 54 70 73 Dewpt 43 42 49 47 48 47 50 48 48 48 51 50 49 47 46 43 PWind dir W NW NE SE SE SE SW W Wind char LT LT LT LT LT LT GN BZ Avg clouds FW FW FW FW FW SC SC FW SC B1 B1 SC B1 SC SC SC PoP 12hr 0 0 0 0 10 20 30 20 Rain shwrs S C S Tstms S $$ MTZ319-172200- Helena-Lewis & Clark MT 46.61N 111.96W Elev. 3893 ft 335 AM MDT Mon Aug 17 2026 Date Mon 08/17/26 Tue 08/18/26 Wed 08/19/26 MDT 3hrly 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 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 83 57 82 53 84 Temp 54 59 73 80 82 71 65 60 57 61 74 79 78 66 61 55 53 59 74 82 83 Dewpt 50 50 50 47 45 47 49 49 48 50 48 42 43 46 48 45 47 48 48 39 38 RH 86 72 44 31 27 42 56 67 72 67 40 27 29 48 62 69 80 67 40 22 20 Wind dir SW N NE NW NW SW W W SW E NE S SW S S S S N W W NW Wind spd 2 2 3 9 10 6 3 3 2 1 4 8 8 4 4 4 1 0 2 9 9 Clouds B2 B1 B1 B1 B2 B1 B2 SC B2 SC SC B1 SC SC SC FW FW CL CL CL FW PoP 12hr 20 20 30 10 0 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S S Tstms S S Date Thu 08/20/26 Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 MDT 6hrly 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 53 88 55 90 57 88 56 82 Temp 62 53 76 86 67 55 78 87 68 57 79 82 65 56 75 80 Dewpt 41 42 44 42 45 46 50 47 52 51 54 52 53 50 50 43 PWind dir W NE NW E W SE SW W Wind char LT LT LT LT LT LT LT LT Avg clouds FW FW FW FW SC SC SC SC B1 B1 B1 B1 B1 SC SC SC PoP 12hr 0 0 0 5 20 30 40 20 Rain shwrs S C C S Tstms S S $$ MTZ326-172200- Bozeman-Gallatin MT 45.78N 111.16W Elev. 4475 ft 335 AM MDT Mon Aug 17 2026 Date Mon 08/17/26 Tue 08/18/26 Wed 08/19/26 MDT 3hrly 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 81 53 80 48 82 Temp 53 61 73 78 77 65 61 57 54 61 73 78 75 63 58 53 49 58 72 80 80 Dewpt 51 51 50 44 49 52 52 51 51 51 48 43 46 52 52 49 47 48 48 41 39 RH 93 70 44 30 37 63 72 80 90 70 41 29 36 67 80 86 93 69 42 25 23 Wind dir SE SE N NW NW SE S S S S W NW SW S SE SE SE N W W W Wind spd 4 2 3 5 8 6 3 4 4 1 4 8 6 5 4 3 3 0 3 5 5 Wind gust 16 Clouds B1 B2 B2 B2 B2 B2 B1 B1 B1 SC FW B1 B1 B1 SC SC FW FW CL CL FW PoP 12hr 30 30 20 30 0 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C S S C C C Tstms S S S S Date Thu 08/20/26 Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 MDT 6hrly 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 50 88 53 90 54 88 52 83 Temp 60 51 76 85 64 53 80 87 66 55 79 82 63 54 75 79 Dewpt 45 43 45 41 45 46 47 46 52 51 52 52 55 53 52 47 PWind dir SE W E SW E S SE SW Wind char LT LT LT LT LT LT LT LT Avg clouds FW FW FW FW SC B1 SC SC B1 B1 B1 B1 B1 B1 SC SC PoP 12hr 0 0 0 5 20 30 40 20 Rain shwrs S S C C S Tstms C S S $$ MTZ330-172200- West Yellowstone-Gallatin MT 44.69N 111.11W Elev. 6644 ft 335 AM MDT Mon Aug 17 2026 Date Mon 08/17/26 Tue 08/18/26 Wed 08/19/26 MDT 3hrly 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 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 75 43 73 35 77 Temp 44 55 72 74 69 61 54 48 45 53 69 73 67 56 48 41 36 49 68 77 74 Dewpt 44 49 49 41 44 49 50 48 45 48 47 41 45 48 46 41 36 44 43 36 35 RH 100 80 44 30 40 65 86100100 83 45 31 45 74 93100100 83 40 23 24 Wind dir NE E SW SW SW SE N N SE N W W W N N N N N W W W Wind spd 1 1 3 12 9 3 3 2 2 0 6 9 5 0 0 0 0 0 4 10 9 Wind gust 18 Clouds B1 B2 B1 B2 B2 B2 B2 B2 OV B1 B1 B1 OV B1 SC SC SC FW CL FW FW PoP 12hr 30 30 30 30 0 QPF 12hr 0 0 0.01 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S S S S S S C C Tstms S S S S S Obvis PF PF PF Date Thu 08/20/26 Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 MDT 6hrly 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 38 81 42 85 45 79 42 75 Temp 52 38 74 79 55 43 78 81 58 47 73 72 55 44 69 69 Dewpt 39 34 41 37 41 39 45 44 48 45 51 51 50 44 49 45 PWind dir SW SW SW W W SW SW SW Wind char LT LT LT LT LT LT LT LT Avg clouds SC FW FW FW SC B1 SC SC SC B1 B2 B1 B1 B1 B1 B1 PoP 12hr 0 0 0 10 20 30 30 30 Rain shwrs S S S C C C Tstms C S C $$ MTZ328-172200- Dillon-Beaverhead MT 45.26N 112.55W Elev. 5357 ft 335 AM MDT Mon Aug 17 2026 Date Mon 08/17/26 Tue 08/18/26 Wed 08/19/26 MDT 3hrly 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 79 51 78 46 81 Temp 52 59 71 78 76 63 59 55 52 58 71 77 73 60 55 51 47 54 69 79 79 Dewpt 50 54 50 44 50 53 51 49 49 52 49 43 50 52 49 47 45 48 46 36 39 RH 93 83 47 30 40 70 75 80 89 80 46 30 44 75 80 86 93 80 44 21 24 Wind dir S SW SW W NW E S S S SW W NW N NE SW S S SW W W W Wind spd 5 4 3 8 10 6 4 5 4 3 3 6 6 4 4 4 4 3 2 6 6 Wind gust 17 Clouds B2 B2 B1 B2 B2 B1 B1 B1 B1 FW SC B1 SC SC SC SC FW FW CL FW FW PoP 12hr 30 30 30 20 0 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C C S S S S S S S Tstms S S S S S S Date Thu 08/20/26 Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 MDT 6hrly 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 48 86 52 86 53 84 50 81 Temp 59 49 73 82 62 53 77 83 62 54 76 79 59 52 73 78 Dewpt 43 40 47 48 46 44 50 54 53 50 54 55 53 50 51 48 PWind dir SW SW S W E S S SW Wind char LT LT LT LT LT LT LT LT Avg clouds FW FW FW FW SC B1 B1 SC B1 B1 B2 B1 B1 B1 SC SC PoP 12hr 0 0 5 20 30 40 40 20 Rain shwrs S C S C C S Tstms S C S S $$ MTZ305-172200- Havre-Hill MT 48.54N 109.76W Elev. 2585 ft 335 AM MDT Mon Aug 17 2026 Date Mon 08/17/26 Tue 08/18/26 Wed 08/19/26 MDT 3hrly 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 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 82 53 83 53 86 Temp 56 64 75 80 79 69 63 57 54 63 76 82 81 69 62 58 54 64 77 84 84 Dewpt 54 54 51 48 50 52 54 52 51 52 49 45 45 50 51 49 48 48 49 45 43 RH 93 70 43 33 36 55 72 83 90 67 39 27 28 51 67 72 80 56 37 26 24 Wind dir W E W W NW N E SE SE N E SW N SE S S SW SW W W W Wind spd 5 5 5 8 8 5 4 4 3 0 2 4 4 5 6 6 9 11 10 10 10 Clouds B2 B2 B2 B2 B1 SC SC SC OV SC B1 FW SC SC SC FW FW CL CL FW FW PoP 12hr 20 20 10 20 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 Date Thu 08/20/26 Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 MDT 6hrly 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 54 86 54 89 58 91 57 84 Temp 64 55 78 84 64 55 81 87 68 59 82 88 67 59 78 82 Dewpt 46 44 48 45 49 48 49 48 50 49 52 52 54 52 49 45 PWind dir SW W NE E E E S W Wind char LT LT LT GN GN GN GN GN Avg clouds FW FW FW FW FW SC FW FW SC SC B1 SC B1 B1 SC FW PoP 12hr 0 0 0 0 10 10 40 10 Rain shwrs C C Tstms S $$ MTZ314-172200- Lewistown-Fergus MT 47.05N 109.46W Elev. 4144 ft 335 AM MDT Mon Aug 17 2026 Date Mon 08/17/26 Tue 08/18/26 Wed 08/19/26 MDT 3hrly 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 77 52 77 50 80 Temp 55 64 73 76 74 64 59 56 54 63 74 74 73 62 58 55 52 63 75 79 78 Dewpt 48 51 47 47 48 52 51 49 47 50 43 43 47 51 50 47 44 46 42 40 40 RH 77 63 40 36 40 65 75 77 77 62 33 33 40 67 75 74 74 54 31 25 26 Wind dir S SW NW NW NW E S S SE SW NW NW NE SE S S SW W NW NW NW Wind spd 5 2 5 8 9 3 4 4 4 1 3 4 4 5 5 5 4 3 6 8 6 Wind gust 18 17 18 Clouds SC B1 B1 B2 B2 B1 B1 B1 B1 SC B1 B1 SC SC SC SC FW FW CL FW FW PoP 12hr 20 30 40 20 0 QPF 12hr 0 0.01 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S C S S S C C S S Tstms S S S S S S Date Thu 08/20/26 Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 MDT 6hrly 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 51 83 53 86 57 87 55 81 Temp 59 53 78 81 62 54 80 84 65 58 80 82 63 58 76 77 Dewpt 44 38 43 44 46 46 48 49 49 49 52 53 53 51 48 47 PWind dir S W E E SE SE S W Wind char LT LT LT LT GN LT LT LT Avg clouds FW FW FW FW FW SC SC FW SC B1 B1 SC B1 B1 SC SC PoP 12hr 0 0 0 0 10 20 40 20 Rain shwrs S C S S Tstms S $$ http://www.weather.gov/greatfalls