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Home Return to list Severe Thunderstorm Warning 0121 Issued by the Great Falls Forecast Office
Action: New Issued At: 2025-07-29 17:42:59 207 WUUS55 KTFX 292242 SVRTFX MTC005-292345- /O.NEW.KTFX.SV.W.0121.250729T2242Z-250729T2345Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Great Falls MT 442 PM MDT Tue Jul 29 2025 The National Weather Service in Great Falls has issued a * Severe Thunderstorm Warning for... Southwestern Blaine County in north central Montana... * Until 545 PM MDT. * At 442 PM MDT, a severe thunderstorm was located 26 miles west of Hays, or 32 miles west of Zortman, moving east at 15 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. * This severe thunderstorm will remain over mainly rural areas of southwestern Blaine County. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Large hail, damaging wind, and continuous cloud to ground lightning are occurring with this storm. Move indoors immediately. Lightning is one of natures leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4797 10926 4806 10933 4820 10901 4797 10891 TIME...MOT...LOC 2242Z 249DEG 11KT 4803 10922 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...1.00 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...<50 MPH $$ IG Action: Continued Issued At: 2025-07-29 17:56:14 633 WWUS55 KTFX 292255 SVSTFX Severe Weather Statement National Weather Service Great Falls MT 455 PM MDT Tue Jul 29 2025 MTC005-292345- /O.CON.KTFX.SV.W.0121.000000T0000Z-250729T2345Z/ Blaine MT- 455 PM MDT Tue Jul 29 2025 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM MDT FOR SOUTHERN BLAINE COUNTY... At 455 PM MDT, a severe thunderstorm was located 23 miles west of Hays, or 30 miles west of Zortman, moving east at 15 mph. HAZARD...Golf ball size hail and 60 mph wind gusts. SOURCE...Radar indicated. IMPACT...People and animals outdoors will be injured. Expect hail damage to roofs, siding, windows, and vehicles. Expect wind damage to roofs, siding, and trees. This severe thunderstorm will remain over mainly rural areas of southern Blaine County. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Continuous cloud to ground lightning is occurring with this storm. Move indoors immediately. Lightning is one of natures leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4798 10918 4808 10925 4820 10901 4797 10891 TIME...MOT...LOC 2255Z 249DEG 11KT 4804 10916 THUNDERSTORM DAMAGE THREAT...CONSIDERABLE HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...1.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ IG Action: Continued Issued At: 2025-07-29 18:11:30 145 WWUS55 KTFX 292310 SVSTFX Severe Weather Statement National Weather Service Great Falls MT 510 PM MDT Tue Jul 29 2025 MTC005-292345- /O.CON.KTFX.SV.W.0121.000000T0000Z-250729T2345Z/ Blaine MT- 510 PM MDT Tue Jul 29 2025 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM MDT FOR SOUTHERN BLAINE COUNTY... At 510 PM MDT, a severe thunderstorm was located 21 miles west of Hays, or 28 miles west of Zortman, moving east at 15 mph. HAZARD...60 mph wind gusts and half dollar size hail. SOURCE...Radar indicated. IMPACT...Hail damage to vehicles is expected. Expect wind damage to roofs, siding, and trees. This severe thunderstorm will remain over mainly rural areas of southern Blaine County. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Continuous cloud to ground lightning is occurring with this storm. Move indoors immediately. Lightning is one of natures leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4799 10915 4808 10919 4818 10900 4800 10892 TIME...MOT...LOC 2310Z 248DEG 14KT 4806 10911 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...1.25 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ IG Action: Continued Issued At: 2025-07-29 18:26:46 619 WWUS55 KTFX 292326 SVSTFX Severe Weather Statement National Weather Service Great Falls MT 526 PM MDT Tue Jul 29 2025 MTC005-292345- /O.CON.KTFX.SV.W.0121.000000T0000Z-250729T2345Z/ Blaine MT- 526 PM MDT Tue Jul 29 2025 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM MDT FOR SOUTHERN BLAINE COUNTY... At 525 PM MDT, a severe thunderstorm was located 18 miles west of Hays, or 25 miles west of Zortman, moving east at 15 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. This severe thunderstorm will remain over mainly rural areas of southern Blaine County. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Continuous cloud to ground lightning is occurring with this storm. Move indoors immediately. Lightning is one of natures leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4800 10906 4810 10912 4817 10899 4800 10892 TIME...MOT...LOC 2325Z 258DEG 12KT 4806 10905 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...1.00 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...<50 MPH $$ IG Action: Cancelled Issued At: 2025-07-29 18:34:31 927 WWUS55 KTFX 292334 SVSTFX Severe Weather Statement National Weather Service Great Falls MT 534 PM MDT Tue Jul 29 2025 MTC005-292343- /O.CAN.KTFX.SV.W.0121.000000T0000Z-250729T2345Z/ Blaine MT- 534 PM MDT Tue Jul 29 2025 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN BLAINE COUNTY IS CANCELLED... The storm which prompted the warning has weakened below severe limits, and no longer poses an immediate threat to life or property. Therefore, the warning has been cancelled. && LAT...LON 4800 10906 4810 10912 4817 10899 4800 10892 TIME...MOT...LOC 2333Z 249DEG 11KT 4807 10901 $$ IG |