Point Forecast Matrices
Issued by NWS Great Falls, MT
Issued by NWS Great Falls, MT
369 FOUS55 KTFX 182135 PFMTFX Point Forecast Matrices National Weather Service Great Falls MT 335 PM MDT Tue Aug 18 2026 MTZ312-191000- Great Falls-Cascade MT 47.47N 111.38W Elev. 3663 ft 335 PM MDT Tue Aug 18 2026 Date 08/18/26 Wed 08/19/26 Thu 08/20/26 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 54 86 55 85 55 Temp 80 69 63 58 55 63 79 84 84 73 65 59 55 63 76 83 83 72 65 59 56 Dewpt 42 47 48 46 43 42 38 37 36 41 41 40 39 41 41 40 40 43 45 46 47 RH 26 45 58 64 64 46 23 19 18 31 41 49 55 44 28 22 22 35 48 62 72 Wind dir W NW SW SW SW SW W W W N S SW SW W NW N N NE E W W Wind spd 12 6 6 8 9 10 9 8 5 4 4 5 5 4 4 6 10 9 6 4 3 Wind gust 18 Clouds SC SC FW FW FW SC FW FW FW SC SC FW FW FW CL CL FW SC FW FW FW PoP 12hr 20 0 0 0 0 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S Tstms Obvis K K K Date 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 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 87 59 89 57 84 54 84 55 88 Temp 74 86 70 61 81 83 67 59 78 81 63 54 76 82 64 56 80 85 Dewpt 48 46 49 50 51 49 50 48 43 37 41 42 42 39 43 44 45 42 PWind dir NW E SW SW W SW W E SW Wind char LT LT LT GN GN GN LT LT LT Avg clouds FW FW B1 B2 B2 B1 B1 SC FW CL FW FW FW FW SC SC SC FW PoP 12hr 0 20 30 30 5 5 0 5 5 Rain shwrs S C C Tstms S $$ MTZ303-191000- Cut Bank-Glacier MT 48.60N 112.39W Elev. 3838 ft 335 PM MDT Tue Aug 18 2026 Date 08/18/26 Wed 08/19/26 Thu 08/20/26 Fri MDT 3hrly 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 52 82 52 78 50 Temp 76 66 59 55 53 61 75 81 81 69 61 55 52 59 69 76 77 66 59 53 51 Dewpt 43 46 44 42 41 44 41 40 40 45 44 43 43 47 49 48 45 47 47 46 46 RH 31 48 57 61 64 53 29 23 23 42 53 64 71 64 49 37 32 50 64 77 83 Wind dir W SW W W W W W W W W W W NW NW N N N NE N NW NW Wind spd 17 8 8 9 8 9 11 12 10 5 6 5 8 11 9 9 10 9 5 2 1 Wind gust 27 19 21 23 20 Clouds SC SC FW FW B1 SC FW SC SC SC FW SC SC FW FW FW FW FW FW FW FW PoP 12hr 20 0 0 0 0 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S Tstms S Obvis K K K K K Date 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 MDT 6hrly 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 81 55 82 52 75 49 78 50 82 Temp 70 80 64 56 75 79 61 54 71 73 57 50 71 77 58 51 74 80 Dewpt 49 47 47 49 50 48 47 44 43 40 41 41 42 39 41 41 43 41 PWind dir E SE S SW W W W SW SW Wind char LT GN LT GN BZ GN LT LT LT Avg clouds FW FW SC B2 B2 B1 B1 FW FW FW FW FW FW FW FW FW SC SC PoP 12hr 0 20 20 30 5 0 0 0 5 Rain shwrs S S C S Tstms S $$ MTZ319-191000- Helena-Lewis & Clark MT 46.61N 111.96W Elev. 3893 ft 335 PM MDT Tue Aug 18 2026 Date 08/18/26 Wed 08/19/26 Thu 08/20/26 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 52 86 53 89 57 Temp 81 70 63 58 53 59 76 84 86 71 62 57 53 60 76 86 87 73 67 60 57 Dewpt 43 44 45 44 43 44 41 33 33 37 38 39 40 40 41 40 38 41 44 44 46 RH 26 39 52 59 69 57 28 16 15 29 41 51 61 47 28 20 18 31 43 55 67 Wind dir W W SW SW W N W W NW W SW SW SW N NE NW NW NW W N N Wind spd 10 5 3 3 2 1 5 11 9 3 4 4 1 0 3 8 9 8 5 0 0 Wind gust 16 19 18 Clouds B1 SC SC FW SC FW FW FW FW SC SC FW FW CL CL FW FW FW SC SC SC PoP 12hr 30 0 0 0 0 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C Tstms Obvis K Date 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 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 89 58 87 55 83 52 84 53 86 Temp 75 88 70 58 79 80 65 55 75 80 62 52 75 82 63 53 77 81 Dewpt 48 46 50 50 53 51 52 49 48 40 42 43 45 39 46 45 48 45 PWind dir NE SW S SW W W S SW SE Wind char LT LT LT LT LT LT LT LT LT Avg clouds SC SC B1 B2 B1 B1 B1 SC FW FW FW FW FW FW SC SC SC SC PoP 12hr 0 20 40 30 10 5 5 10 20 Rain shwrs S S C C S Tstms S S S $$ MTZ326-191000- Bozeman-Gallatin MT 45.78N 111.16W Elev. 4475 ft 335 PM MDT Tue Aug 18 2026 Date 08/18/26 Wed 08/19/26 Thu 08/20/26 Fri MDT 3hrly 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 49 83 50 90 53 Temp 76 64 59 54 50 58 73 81 82 67 61 56 51 60 77 88 88 72 65 57 53 Dewpt 46 49 49 47 46 45 44 36 34 44 43 42 40 41 43 42 41 47 45 44 45 RH 34 58 69 77 86 62 35 20 18 43 51 59 66 49 30 20 19 41 48 62 74 Wind dir S SE S S S N NW W NW E SE SE SE N W NW NW E E SE SE Wind spd 8 5 4 3 3 0 4 6 6 3 4 4 4 0 2 3 4 5 6 5 3 Clouds B1 B1 B1 FW FW FW FW FW FW FW SC FW FW FW FW FW SC SC SC SC SC PoP 12hr 30 0 0 0 0 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C S Tstms S Date 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 MDT 6hrly 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 90 55 86 52 84 50 84 51 85 Temp 78 87 67 56 78 81 63 53 76 81 60 51 75 82 61 52 77 80 Dewpt 47 45 50 50 51 52 54 51 50 44 48 46 47 43 48 47 48 47 PWind dir W E S S SW SE SW SE SW Wind char LT LT LT LT LT LT LT LT LT Avg clouds SC SC B1 B2 B2 B1 B2 SC SC FW SC SC FW FW SC B1 SC SC PoP 12hr 5 20 30 30 10 10 5 10 20 Rain shwrs S C C S Tstms S S S $$ MTZ330-191000- West Yellowstone-Gallatin MT 44.69N 111.11W Elev. 6644 ft 335 PM MDT Tue Aug 18 2026 Date 08/18/26 Wed 08/19/26 Thu 08/20/26 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 79 39 84 44 Temp 69 58 49 43 39 50 69 78 77 61 52 45 40 53 75 83 82 66 56 49 44 Dewpt 44 45 44 42 39 42 42 36 34 37 37 37 36 38 41 38 39 42 42 41 39 RH 40 62 83 96100 74 37 22 21 41 56 73 85 57 29 20 22 42 59 74 82 Wind dir SW W N S SE N W W W S N N N N SW SW SW N N N N Wind spd 8 4 3 1 1 0 8 10 5 1 0 0 0 0 2 9 5 0 0 0 0 Wind gust 18 16 Clouds B1 B1 B1 SC SC FW CL FW FW SC FW FW FW FW FW FW SC B1 SC SC SC PoP 12hr 30 0 0 0 0 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C S Tstms S Obvis PF PF Date 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 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 87 47 78 43 76 40 77 41 77 Temp 79 83 59 48 71 71 55 44 70 69 52 40 71 71 52 41 71 68 Dewpt 46 41 47 46 52 50 49 44 49 43 44 40 45 41 45 41 48 45 PWind dir SW S SW SW SW SW SW W S Wind char LT LT LT LT LT LT LT LT LT Avg clouds SC SC B1 B2 OV B1 B1 B1 SC FW SC SC SC FW B1 B1 B1 B1 PoP 12hr 5 30 40 30 20 20 20 20 30 Rain shwrs S C C C C S S S S C Tstms S C S S S S S C $$ MTZ328-191000- Dillon-Beaverhead MT 45.26N 112.55W Elev. 5357 ft 335 PM MDT Tue Aug 18 2026 Date 08/18/26 Wed 08/19/26 Thu 08/20/26 Fri MDT 3hrly 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 48 83 49 86 52 Temp 74 63 58 54 49 56 71 81 81 65 59 54 50 58 73 84 83 68 62 56 53 Dewpt 49 50 48 47 44 46 43 35 39 43 41 40 39 44 41 41 46 49 46 44 43 RH 41 62 69 77 83 69 36 19 22 45 51 59 66 59 31 22 27 51 56 64 69 Wind dir N SE S S S SW W W NW NE S S S SW W W NW NE SE S S Wind spd 10 6 4 6 5 3 4 6 6 3 4 4 4 3 2 3 5 4 5 4 4 Wind gust 16 17 Clouds B1 B1 SC FW SC CL FW FW SC SC FW FW FW FW FW FW SC SC SC SC SC PoP 12hr 20 0 0 0 5 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S Tstms Date 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 MDT 6hrly 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 86 54 83 50 81 48 81 49 81 Temp 74 83 63 55 75 75 59 51 74 75 57 49 72 76 58 51 73 73 Dewpt 49 52 52 49 53 56 52 48 50 46 45 43 48 48 48 46 51 52 PWind dir W SE S SW SW SW SW S SW Wind char LT LT LT GN GN LT LT LT LT Avg clouds SC SC B1 B2 B2 B1 B1 SC SC FW SC SC FW FW B1 B1 B1 B1 PoP 12hr 5 30 50 30 10 10 20 20 30 Rain shwrs C C C S S C Tstms S C S S S S $$ MTZ305-191000- Havre-Hill MT 48.54N 109.76W Elev. 2585 ft 335 PM MDT Tue Aug 18 2026 Date 08/18/26 Wed 08/19/26 Thu 08/20/26 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 55 87 55 87 54 Temp 82 71 63 59 56 63 77 85 85 73 65 60 56 64 79 85 85 72 64 59 55 Dewpt 45 48 47 46 45 45 45 42 42 47 47 46 46 45 49 47 46 48 49 48 47 RH 27 44 56 62 66 52 32 22 22 40 52 60 69 50 35 27 26 42 58 67 74 Wind dir W SW SW SW SW SW W NW NW NE E E E E E N N NE E E E Wind spd 9 6 5 9 9 10 8 9 8 3 3 3 2 5 8 6 11 11 9 9 9 Clouds SC SC FW SC SC SC FW SC SC SC SC SC SC FW FW CL FW FW FW FW FW PoP 12hr 20 0 0 0 0 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S Tstms Obvis K K K K K K Date 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 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 59 90 57 85 53 85 54 90 Temp 78 87 69 61 82 87 67 59 79 82 63 54 77 82 63 55 81 87 Dewpt 48 47 49 49 51 51 53 50 46 41 44 44 43 39 44 44 45 42 PWind dir E E SE SW W W SW E E Wind char GN GN GN GN GN LT LT LT LT Avg clouds FW FW SC B1 B2 SC B2 B1 SC FW FW FW FW FW FW SC SC FW PoP 12hr 0 5 20 40 5 5 0 5 5 Rain shwrs S C C Tstms S $$ MTZ314-191000- Lewistown-Fergus MT 47.05N 109.46W Elev. 4144 ft 335 PM MDT Tue Aug 18 2026 Date 08/18/26 Wed 08/19/26 Thu 08/20/26 Fri MDT 3hrly 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 52 82 52 85 53 Temp 74 64 59 56 53 63 76 81 81 66 61 57 56 68 78 83 82 68 61 57 54 Dewpt 45 51 48 45 42 43 41 37 39 43 44 41 41 44 40 39 41 46 46 45 45 RH 35 63 67 66 66 48 28 21 22 43 53 55 57 42 26 21 23 45 58 64 71 Wind dir W S S S S W NW NW NW S S S S SW NW NW N NE SE SE SE Wind spd 10 5 6 6 6 5 9 9 6 3 4 4 4 2 4 6 6 5 4 4 5 Wind gust 17 19 19 17 Clouds B1 SC FW FW SC FW FW SC FW FW SC SC SC CL CL CL FW FW FW SC SC PoP 12hr 20 0 0 0 0 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S Tstms S Obvis K K Date 08/21/26 Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 MDT 6hrly 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 85 57 86 55 82 52 82 53 85 Temp 77 83 66 58 80 81 64 58 77 79 60 53 75 79 61 54 80 80 Dewpt 47 49 48 49 52 53 52 49 46 44 45 43 43 44 46 44 46 47 PWind dir E E S SW W W W SE SE Wind char LT GN LT LT LT LT LT LT LT Avg clouds FW FW SC B1 B2 B1 B2 SC SC FW FW FW FW CL FW SC SC FW PoP 12hr 0 10 30 30 20 10 10 5 10 Rain shwrs C C C S Tstms S S $$ http://www.weather.gov/greatfalls