Point Forecast Matrices
Issued by NWS Great Falls, MT
Issued by NWS Great Falls, MT
541 FOUS55 KTFX 190631 PFMTFX Point Forecast Matrices National Weather Service Great Falls MT 1231 AM MDT Tue May 19 2026 MTZ312-201000- Great Falls-Cascade MT 47.47N 111.38W Elev. 3663 ft 1231 AM MDT Tue May 19 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 31 64 40 58 38 Temp 35 32 47 59 61 62 53 47 43 41 51 55 56 52 47 44 41 39 Dewpt 26 24 28 32 35 36 36 36 33 32 35 37 41 40 39 39 37 35 RH 69 72 47 36 38 38 52 65 67 70 54 51 57 63 74 82 85 85 Wind dir SW SW SW W W SW SW SW SW W NW N N NW NW W W W Wind spd 8 9 12 11 11 10 5 9 10 9 8 8 10 9 6 6 6 5 Clouds FW FW FW B1 B2 B1 B1 SC SC OV OV OV OV B2 B2 B2 B1 B1 PoP 12hr 0 40 20 80 70 QPF 12hr 0 0 0 0.11 0.11 Snow 12hr 00-00 00-00 00-00 Rain S C L L C C S Rain shwrs C C L D Tstms S S S C 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 63 40 70 44 76 48 78 51 78 Temp 54 62 48 41 64 68 52 46 70 74 56 50 71 75 58 53 72 73 Dewpt 34 34 34 31 33 34 38 36 35 36 37 36 34 34 35 34 35 37 PWind dir NW S SW S SW SW SW SW SW Wind char LT LT LT LT GN GN GN GN BZ Avg clouds B1 SC SC SC SC SC SC SC SC FW SC SC SC FW SC SC SC SC PoP 12hr 20 0 0 0 5 5 0 0 5 Rain S $$ MTZ303-201000- Cut Bank-Glacier MT 48.60N 112.39W Elev. 3838 ft 1231 AM MDT Tue May 19 2026 Date 05/18/26 Tue 05/19/26 Wed 05/20/26 Thu MDT 3hrly 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 30 62 38 55 34 Temp 33 32 47 56 59 61 52 45 42 40 44 48 53 52 46 41 37 35 Dewpt 27 27 29 31 32 33 33 34 33 34 36 35 37 35 36 35 33 31 RH 78 81 49 38 36 35 48 65 70 79 73 60 54 52 68 79 85 85 Wind dir SW W W W W W W W W NW N N N N N NW NW NW Wind spd 8 9 14 17 18 19 13 12 10 11 12 12 11 12 9 11 11 10 Wind gust 27 Clouds SC B1 B1 B1 B1 B1 SC SC B1 OV OV OV OV B2 B2 B1 SC SC PoP 12hr 10 20 10 80 40 QPF 12hr 0 0 0 0.03 0.02 Snow 12hr 00-00 00-00 00-00 Rain C C C C C Rain shwrs S S D Tstms S S S Date 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 Mon 05/25/26 MDT 6hrly 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 63 39 69 42 73 44 74 46 72 Temp 55 63 46 39 64 67 50 44 68 70 52 45 67 71 54 48 67 68 Dewpt 31 30 32 29 31 34 36 34 34 34 36 34 32 31 33 31 32 33 PWind dir NW SW W SW SW W W SW W Wind char GN LT LT LT GN BZ BZ BZ BZ Avg clouds SC SC SC SC SC SC B1 SC SC FW SC SC SC FW SC B1 SC SC PoP 12hr 0 0 5 0 10 5 5 0 5 $$ MTZ319-201000- Helena-Lewis & Clark MT 46.61N 111.96W Elev. 3893 ft 1231 AM MDT Tue May 19 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 31 65 38 64 38 Temp 34 31 43 57 62 63 55 47 42 38 48 59 62 57 50 45 41 39 Dewpt 22 22 24 28 29 29 32 33 31 31 31 33 35 36 38 38 37 37 RH 61 69 47 33 28 27 41 58 65 76 51 37 36 45 63 76 85 92 Wind dir S S W W W W SW SW SW SW W NW NW NW NW NW NW NW Wind spd 5 3 2 4 6 9 4 5 5 2 2 8 12 13 10 6 6 5 Wind gust 18 Clouds FW FW SC B1 B1 B2 SC B1 B1 B1 B1 B1 B2 OV OV B2 B2 B1 PoP 12hr 0 20 20 60 90 QPF 12hr 0 0 0 0.05 0.08 Snow 12hr 00-00 00-00 00-00 Rain S S S D D D C Rain shwrs S C C D Tstms S 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 63 39 71 41 76 44 78 46 78 Temp 53 63 47 39 62 69 52 43 68 74 55 45 71 76 57 47 72 75 Dewpt 34 29 32 32 33 31 35 34 35 32 34 34 32 29 33 33 33 30 PWind dir NW W NW W SW W SW W W Wind char LT LT LT LT LT LT GN GN GN Avg clouds B1 SC SC SC SC SC SC SC FW FW SC SC SC SC SC SC SC SC PoP 12hr 40 0 5 0 5 0 5 5 10 Rain C $$ MTZ326-201000- Bozeman-Gallatin MT 45.78N 111.16W Elev. 4475 ft 1231 AM MDT Tue May 19 2026 Date 05/18/26 Tue 05/19/26 Wed 05/20/26 Thu MDT 3hrly 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 25 62 34 63 35 Temp 29 26 40 54 59 60 51 44 38 35 46 58 62 58 49 45 40 36 Dewpt 23 20 21 24 24 23 31 31 29 29 30 34 33 34 39 39 37 35 RH 78 78 46 31 26 24 46 60 70 78 53 40 33 40 68 79 89 96 Wind dir S S E NW NW NW SW SE S S SW W NW NW NW NW NW NW Wind spd 5 4 1 3 5 5 2 3 3 3 1 5 8 9 6 4 4 5 Clouds FW FW FW FW B1 B1 B2 B2 B1 B2 B1 B1 B2 OV OV OV OV B2 PoP 12hr 0 5 20 40 90 QPF 12hr 0 0 0 0.03 0.12 Snow 12hr 00-00 00-00 00-00 Rain S S C D D D L Rain shwrs C D Tstms S S Date 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 Mon 05/25/26 MDT 6hrly 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 58 33 68 39 76 42 78 45 80 Temp 49 58 42 34 60 66 48 40 67 74 53 43 72 76 55 46 74 76 Dewpt 36 33 32 28 32 31 34 33 35 34 36 34 34 32 33 32 33 33 PWind dir NW E SW E SW S SW S SW Wind char LT LT LT LT LT LT LT LT GN Avg clouds B2 B1 SC SC SC FW SC SC FW FW SC SC FW FW SC SC SC SC PoP 12hr 60 0 0 0 5 10 5 5 10 Rain L C $$ MTZ330-201000- West Yellowstone-Gallatin MT 44.69N 111.11W Elev. 6644 ft 1231 AM MDT Tue May 19 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 17 54 26 57 30 Temp 20 18 33 50 54 53 43 35 29 26 39 54 57 55 45 38 34 31 Dewpt 16 15 15 14 14 15 21 23 21 21 23 23 26 29 34 35 34 31 RH 84 88 47 23 20 22 41 61 72 81 52 30 30 37 65 89100100 Wind dir N N N SW SW W W SE NE SE SW SW W W N N N N Wind spd 0 0 0 4 6 8 2 2 1 1 3 9 8 5 1 0 0 0 Wind gust 18 13 19 19 18 Clouds FW CL FW SC B1 B1 B1 B2 B1 B1 B1 B2 B2 B2 OV OV B2 B2 PoP 12hr 0 10 10 40 80 QPF 12hr 0 0 0 0.01 0.13 Snow 12hr 00-00 00-00 00-00 Rain L D D S Rain shwrs S C L Snow D C 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 55 26 62 30 69 34 74 36 75 Temp 49 53 34 27 58 60 40 32 63 67 44 35 68 71 47 37 70 72 Dewpt 29 24 28 26 27 32 32 29 30 35 33 30 29 30 30 28 28 31 PWind dir N NE SW SW SW SW SW S SW Wind char LT LT LT LT LT LT LT LT GN Avg clouds B1 B1 SC SC SC SC B1 SC FW SC SC SC SC SC SC SC SC FW PoP 12hr 40 5 20 5 5 10 5 5 5 Rain C S Rain shwrs S Snow C Tstms S $$ MTZ328-201000- Dillon-Beaverhead MT 45.26N 112.55W Elev. 5357 ft 1231 AM MDT Tue May 19 2026 Date 05/18/26 Tue 05/19/26 Wed 05/20/26 Thu MDT 3hrly 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 26 61 34 62 35 Temp 29 26 39 54 59 60 50 43 37 35 46 58 61 60 50 44 38 36 Dewpt 18 18 21 23 21 21 27 28 27 26 29 31 30 31 34 36 34 33 RH 63 71 48 30 23 22 41 55 67 69 51 36 31 33 54 73 85 89 Wind dir S S SW SW W W SE S S S W W NW N N N N N Wind spd 4 5 4 6 9 9 5 4 4 4 4 8 9 10 8 6 8 8 Clouds FW FW FW SC SC B1 B2 B2 B1 B1 B1 B1 B2 B1 B2 B2 B2 B2 PoP 12hr 0 5 20 20 70 QPF 12hr 0 0 0 0 0.03 Snow 12hr 00-00 00-00 00-00 Rain S S C L L C Rain shwrs C Tstms S Date 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 Mon 05/25/26 MDT 6hrly 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 60 35 68 39 75 41 78 44 79 Temp 51 59 43 36 61 66 48 40 67 73 52 43 72 76 55 46 73 76 Dewpt 32 29 29 26 32 30 32 30 33 30 32 30 31 27 29 27 30 28 PWind dir N E W SE SW SW SW SW SW Wind char GN LT LT LT GN GN GN GN BZ Avg clouds B1 SC SC SC SC SC SC SC FW FW SC SC SC SC SC SC SC SC PoP 12hr 40 0 0 0 5 0 0 0 10 Rain C $$ MTZ305-201000- Havre-Hill MT 48.54N 109.76W Elev. 2585 ft 1231 AM MDT Tue May 19 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 68 40 62 36 Temp 34 31 45 62 67 63 55 49 45 41 49 57 60 59 52 46 41 37 Dewpt 23 23 27 34 34 36 39 39 37 35 39 39 37 35 37 39 36 34 RH 64 72 49 35 29 36 55 68 73 79 68 51 42 40 56 76 82 89 Wind dir S S SW SW W W S SW SW SW NW NW NW NW NW W W W Wind spd 5 4 5 11 11 10 6 9 10 10 11 13 13 12 8 5 6 6 Clouds B1 B1 CL SC B1 B1 B1 B1 B1 OV OV B2 B2 B2 B2 B1 B1 B1 PoP 12hr 0 30 30 50 10 QPF 12hr 0 0.03 0 0.04 0.01 Snow 12hr 00-00 00-00 00-00 Rain S C C C Rain shwrs 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 66 38 73 43 79 46 79 49 81 Temp 59 65 48 39 67 71 53 45 73 76 57 48 74 77 59 51 76 77 Dewpt 37 34 36 32 36 33 37 36 38 37 40 38 36 35 38 36 38 37 PWind dir W S W SE SW SW W SW W Wind char GN LT LT LT LT GN GN GN GN Avg clouds B1 B1 SC SC SC SC SC SC SC FW SC SC FW FW FW B1 SC SC PoP 12hr 10 0 0 0 5 10 5 5 5 $$ MTZ314-201000- Lewistown-Fergus MT 47.05N 109.46W Elev. 4144 ft 1231 AM MDT Tue May 19 2026 Date 05/18/26 Tue 05/19/26 Wed 05/20/26 Thu MDT 3hrly 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 26 60 36 58 35 Temp 27 31 48 55 58 57 48 43 40 37 51 55 56 52 45 42 39 36 Dewpt 22 25 30 30 33 35 36 33 31 28 33 35 39 40 39 37 36 33 RH 81 78 49 38 39 43 63 67 70 70 50 47 53 63 79 82 89 89 Wind dir SE S W W W W SW S SW SW W NW NW NW NW W W W Wind spd 8 8 8 6 5 5 4 6 6 6 9 9 9 8 4 4 4 6 Clouds SC SC FW SC SC B2 B2 B1 SC OV OV OV OV B2 OV B2 B2 B2 PoP 12hr 0 30 20 80 80 QPF 12hr 0 0 0 0.10 0.11 Snow 12hr 00-00 00-00 00-00 Rain S D D L L C Rain shwrs S D D Tstms S C C Date 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 Mon 05/25/26 MDT 6hrly 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 57 35 66 40 72 43 74 45 77 Temp 49 56 41 37 61 64 47 44 67 70 51 47 70 72 54 50 72 73 Dewpt 34 34 32 28 32 34 34 34 35 37 36 35 34 36 34 33 35 38 PWind dir NW SW W S SW SW W SW SW Wind char GN LT LT LT LT GN GN LT GN Avg clouds B2 B1 SC SC SC SC SC SC FW FW SC SC SC FW SC SC SC FW PoP 12hr 50 5 5 5 5 10 5 5 10 Rain C C $$ http://www.weather.gov/greatfalls