FOUS55 KTFX 182135 PFMTFX Point Forecast Matrices National Weather Service Great Falls MT 335 PM MDT Mon May 18 2026 MTZ312-191000- Great Falls-Cascade MT 47.47N 111.38W Elev. 3663 ft 335 PM MDT Mon May 18 2026 Date 05/18/26 Tue 05/19/26 Wed 05/20/26 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 30 64 40 56 38 Temp 52 45 38 34 31 46 58 61 62 54 48 43 41 50 53 54 50 45 43 41 39 Dewpt 27 31 30 28 26 28 29 31 33 37 38 35 34 35 33 37 37 38 39 38 36 RH 38 58 73 78 81 49 33 32 33 52 68 73 76 56 46 52 61 76 86 89 89 Wind dir SE S S SW SW SW SW W W SW SW SW W W N N N NW NW NW NW Wind spd 6 6 6 8 9 11 10 10 8 5 8 9 9 9 8 9 11 8 8 6 8 Clouds SC SC SC SC SC FW SC B1 B1 B1 B1 B1 OV B1 B2 B2 B2 B2 B2 B2 B1 PoP 12hr 5 40 20 70 80 QPF 12hr 0 0.01 0 0.07 0.23 Snow 12hr 00-00 00-00 00-00 Rain C C D D C C C Rain shwrs S C S L L Tstms S S S Date 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 Mon 05/25/26 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 61 39 69 43 76 50 79 51 79 Temp 53 61 47 40 63 67 51 45 69 74 57 51 73 76 59 53 73 75 Dewpt 34 34 35 33 34 34 37 35 35 34 37 34 34 34 36 35 35 37 PWind dir NW S SW S SW SW SW SW SW Wind char LT LT LT LT GN GN GN GN GN Avg clouds B1 SC SC SC SC SC SC FW FW SC SC SC SC SC SC SC SC SC PoP 12hr 30 5 0 0 0 5 5 5 10 Rain C S $$ MTZ303-191000- Cut Bank-Glacier MT 48.60N 112.39W Elev. 3838 ft 335 PM MDT Mon May 18 2026 Date 05/18/26 Tue 05/19/26 Wed 05/20/26 Thu MDT 3hrly 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 29 63 37 53 34 Temp 54 45 38 33 30 46 57 59 62 52 45 42 40 45 48 51 50 44 40 37 35 Dewpt 26 29 31 29 27 28 29 30 33 34 35 34 34 36 35 37 35 36 35 33 32 RH 34 53 76 85 88 49 34 33 33 50 68 73 79 70 60 59 56 73 82 85 89 Wind dir W SW SW W W W W W W W W NW NW N NW N N NW NW NW NW Wind spd 6 6 8 8 8 13 17 18 18 12 11 10 11 13 12 13 12 11 11 11 10 Wind gust 28 23 Clouds B2 B1 SC SC SC SC B1 SC SC B2 B1 B2 OV B2 OV OV B2 B2 B1 SC SC PoP 12hr 30 20 30 90 40 QPF 12hr 0 0.01 0 0.07 0.06 Snow 12hr 00-00 00-00 00-00 Rain S S L L D C C S S Rain shwrs C S S S C D Tstms S S Date 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 Mon 05/25/26 MDT 6hrly 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 62 37 68 40 74 45 74 46 73 Temp 54 62 46 38 62 66 48 42 68 71 53 46 69 72 54 48 67 70 Dewpt 32 31 32 31 31 33 35 33 33 33 35 33 31 31 33 32 32 34 PWind dir NW SW W W SW W SW SW W Wind char GN LT LT LT GN GN BZ BZ BZ Avg clouds SC SC SC SC SC SC B1 FW SC SC SC SC SC SC SC SC SC SC PoP 12hr 5 5 5 5 0 5 5 5 10 $$ MTZ319-191000- Helena-Lewis & Clark MT 46.61N 111.96W Elev. 3893 ft 335 PM MDT Mon May 18 2026 Date 05/18/26 Tue 05/19/26 Wed 05/20/26 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 30 65 38 60 37 Temp 56 47 39 34 30 42 56 62 64 55 47 42 38 46 57 59 55 48 43 40 38 Dewpt 22 25 26 25 24 26 26 26 26 32 33 31 31 30 30 31 31 34 36 35 36 RH 26 42 59 69 78 53 31 25 23 41 58 65 76 53 35 34 40 58 76 82 92 Wind dir W W SW SW S W W W W W SW SW W N NW NW N NW NW NW NW Wind spd 6 2 4 4 3 2 2 6 8 4 5 4 3 0 4 10 13 11 9 8 6 Clouds B1 SC SC FW SC SC SC SC SC B1 SC SC SC SC B1 B2 OV OV B2 B2 B1 PoP 12hr 5 30 30 40 80 QPF 12hr 0 0 0 0 0.15 Snow 12hr 00-00 00-00 00-00 Rain C D L L C Rain shwrs S S S C C D Tstms S S Date 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 Mon 05/25/26 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 64 38 70 40 76 44 79 45 79 Temp 51 64 47 38 60 68 51 41 67 75 55 46 72 77 57 47 72 76 Dewpt 34 30 33 32 33 30 34 33 35 31 34 34 33 30 33 34 33 31 PWind dir N W E W SW W W W SW Wind char LT LT LT LT LT LT LT LT GN Avg clouds B1 B1 B1 SC SC SC SC FW FW SC SC SC SC SC SC SC SC FW PoP 12hr 50 0 5 0 0 5 10 5 10 Rain C $$ MTZ326-191000- Bozeman-Gallatin MT 45.78N 111.16W Elev. 4475 ft 335 PM MDT Mon May 18 2026 Date 05/18/26 Tue 05/19/26 Wed 05/20/26 Thu MDT 3hrly 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 24 62 33 60 34 Temp 51 42 33 28 25 40 53 59 60 51 44 38 34 46 56 59 57 48 43 39 36 Dewpt 21 25 26 23 19 22 23 24 23 31 32 30 28 30 30 29 32 38 37 36 35 RH 30 50 75 81 78 48 31 26 24 46 62 73 78 53 37 32 38 68 79 89 96 Wind dir N SE S SE S N W W N SE S S S N W W NW NW NW NW NW Wind spd 5 3 6 5 4 0 3 5 4 3 4 3 4 0 4 6 8 5 4 4 4 Clouds SC FW FW FW FW FW FW B1 B1 B1 SC SC SC SC B1 B2 OV OV OV OV B2 PoP 12hr 05 30 20 90 QPF 12hr 0 0 0 0 0.15 Snow 12hr 00-00 00-00 00-00 Rain S D D D L Rain shwrs S C S D Tstms S S Date 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 Mon 05/25/26 MDT 6hrly 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 59 32 66 37 75 42 80 44 81 Temp 48 59 44 35 58 65 47 39 67 73 52 44 73 78 55 46 74 78 Dewpt 37 34 34 32 34 32 33 32 35 33 35 34 34 32 34 33 34 32 PWind dir NW SE SW SE SW S SW S S Wind char LT LT LT LT LT LT LT LT GN Avg clouds B2 B1 B1 SC SC SC SC SC FW FW SC SC FW FW SC SC SC FW PoP 12hr 60 10 5 5 0 10 5 5 10 Rain L Rain shwrs C Tstms S $$ MTZ330-191000- West Yellowstone-Gallatin MT 44.69N 111.11W Elev. 6644 ft 335 PM MDT Mon May 18 2026 Date 05/18/26 Tue 05/19/26 Wed 05/20/26 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 15 54 25 54 29 Temp 44 34 24 19 16 31 49 53 53 43 35 29 26 38 53 54 53 44 38 33 30 Dewpt 9 17 19 18 15 15 13 12 15 24 26 24 24 24 22 22 25 31 34 32 30 RH 23 49 81 96 96 51 23 19 22 47 69 81 92 57 29 28 33 60 85 96100 Wind dir N NE N N N N SW SW W SW S S SE SW SW SW W SW N N N Wind spd 9 3 0 0 0 0 4 5 5 2 1 1 1 1 8 8 8 1 0 0 0 Wind gust 20 16 19 19 19 Clouds B1 FW FW FW FW FW FW B1 B1 B1 SC SC SC SC SC B2 B2 OV B2 B2 B2 PoP 12hr 0 10 20 20 80 QPF 12hr 0 0 0 0.01 0.09 Snow 12hr 00-00 00-00 00-00 Rain S C C D D L Rain shwrs S S Snow D L Tstms S Obvis PF Date 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 Mon 05/25/26 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 55 26 61 29 68 34 74 36 76 Temp 49 55 35 28 56 59 39 31 63 67 44 35 69 72 48 38 71 74 Dewpt 31 28 30 28 27 31 32 29 29 31 32 30 29 31 31 29 28 30 PWind dir N N SW W SW SW SW S S Wind char LT LT LT LT LT LT LT LT GN Avg clouds B2 B1 B1 SC SC SC B1 SC FW SC B1 SC FW SC SC FW FW FW PoP 12hr 60 10 10 5 5 5 5 5 10 Rain LRain shwrs S Snow L Tstms S $$ MTZ328-191000- Dillon-Beaverhead MT 45.26N 112.55W Elev. 5357 ft 335 PM MDT Mon May 18 2026 Date 05/18/26 Tue 05/19/26 Wed 05/20/26 Thu MDT 3hrly 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 25 61 33 61 34 Temp 50 41 33 29 26 38 53 58 60 50 43 37 34 44 57 60 58 49 43 38 35 Dewpt 17 21 20 19 18 21 21 19 21 28 30 28 27 29 30 28 28 34 34 33 31 RH 27 44 58 66 71 50 28 22 22 42 60 70 75 55 35 29 32 56 70 82 85 Wind dir NE N S S S SW SW W W S S S S W W W NW N N N N Wind spd 10 3 4 5 5 3 6 8 6 4 5 5 4 3 6 9 10 6 8 9 11 Clouds FW SC SC FW FW FW SC SC B1 B2 B2 SC SC SC B1 B2 B2 B2 B2 B2 B1 PoP 12hr 0 10 20 5 70 QPF 12hr 0 0 0 0 0.02 Snow 12hr 00-00 00-00 00-00 Rain L L L C Rain shwrs S S L Snow S Tstms S Date 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 Mon 05/25/26 MDT 6hrly 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 60 33 66 37 74 42 79 44 79 Temp 50 60 43 36 59 65 47 39 67 73 52 44 73 77 54 46 73 77 Dewpt 33 30 31 28 32 30 31 29 33 30 32 30 32 27 30 28 31 29 PWind dir N E SW SW SW SW SW S SW Wind char GN LT LT LT LT GN GN GN BZ Avg clouds B1 SC SC FW SC SC SC SC FW FW SC SC FW FW SC SC SC FW PoP 12hr 30 0 5 5 0 5 5 5 10 Rain C Snow S $$ MTZ305-191000- Havre-Hill MT 48.54N 109.76W Elev. 2585 ft 335 PM MDT Mon May 18 2026 Date 05/18/26 Tue 05/19/26 Wed 05/20/26 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 28 68 40 60 36 Temp 54 46 37 34 29 44 62 67 64 55 50 45 41 48 56 59 56 50 44 41 37 Dewpt 24 27 25 25 23 28 34 33 37 39 40 37 36 38 37 35 34 37 37 36 35 RH 31 47 61 69 78 53 35 28 37 55 68 73 82 68 49 40 43 61 76 82 92 Wind dir E E SE E E SW SW SW SW S SW SW W W NW NW N NW W NW NW Wind spd 4 5 8 5 3 3 11 11 10 8 9 10 10 10 11 13 12 6 5 5 6 Clouds FW FW FW SC SC FW SC B2 B2 B1 B2 B2 B2 B1 B1 B2 B2 B2 B2 B1 B1 PoP 12hr 0 40 60 50 30 QPF 12hr 0 0 0.01 0.02 0 Snow 12hr 00-00 00-00 00-00 Rain C C C C C S S Rain shwrsS S L C C Tstms S S Date 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 Mon 05/25/26 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 65 36 72 42 78 47 81 49 83 Temp 57 64 47 39 66 69 52 44 73 77 57 49 74 79 60 51 77 79 Dewpt 36 34 37 34 36 34 37 36 38 35 39 37 37 35 37 36 37 36 PWind dir NW SE SW S SW SW SW SW SW Wind char GN LT LT LT LT LT GN GN GN Avg clouds B1 B1 SC SC SC SC SC SC SC FW SC SC SC SC SC SC SC FW PoP 12hr 10 0 5 0 0 5 5 5 10 $$ MTZ314-191000- Lewistown-Fergus MT 47.05N 109.46W Elev. 4144 ft 335 PM MDT Mon May 18 2026 Date 05/18/26 Tue 05/19/26 Wed 05/20/26 Thu MDT 3hrly 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 26 60 36 56 35 Temp 46 37 29 27 30 48 55 58 58 48 43 40 37 50 55 55 50 44 41 39 37 Dewpt 26 27 25 23 24 30 28 30 34 37 35 33 30 33 33 36 38 38 37 36 35 RH 45 67 85 85 78 49 35 34 40 65 73 76 75 52 43 49 63 79 85 89 92 Wind dir N E SE SE S W W W SW S S SW SW W NW NW NW NW NW NW NW Wind spd 6 2 6 6 8 6 5 5 4 4 6 6 6 8 10 8 8 4 3 4 5 Clouds SC FW FW FW SC FW SC SC B1 B1 B1 B1 B1 SC B2 B2 B2 OV B2 B2 B2 PoP 12hr 0 20 30 70 80 QPF 12hr 0 0.01 0 0.05 0.21 Snow 12hr 00-00 00-00 00-00 Rain D L L L Rain shwrs S S S C L L D Tstms S S C S Date 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 Mon 05/25/26 MDT 6hrly 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 56 34 64 39 72 43 76 45 78 Temp 48 56 42 38 59 62 45 43 67 70 51 48 71 74 54 50 73 74 Dewpt 35 35 34 33 33 34 34 34 34 36 35 34 35 37 34 34 35 38 PWind dir NW SW W S SW SW W SW SW Wind char GN LT LT LT LT LT LT LT GN Avg clouds B2 B1 B1 SC SC SC SC SC FW FW SC SC SC SC SC SC SC FW PoP 12hr 60 10 10 0 5 0 5 5 10 Rain L C $$ http://www.weather.gov/greatfalls