830 WUUS55 KTFX 140302 SVRTFX MTC015-027-140345- /O.NEW.KTFX.SV.W.0138.260914T0302Z-260914T0345Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Great Falls MT 902 PM MDT Sun Sep 13 2026 The National Weather Service in Great Falls has issued a * Severe Thunderstorm Warning for... Northwestern Fergus County in central Montana... Southeastern Chouteau County in north central Montana... * Until 945 PM MDT. * At 901 PM MDT, a severe thunderstorm was located near Geraldine, or 29 miles southeast of Fort Benton, moving northeast at 35 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. * Locations impacted include... Geraldine, Judith Landing, and Iliad. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4748 11016 4761 11029 4794 10980 4763 10950 TIME...MOT...LOC 0301Z 238DEG 32KT 4758 11015 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...1.00 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...<50 MPH $$ RCG  584 WWUS55 KTFX 140307 SVSTFX Severe Weather Statement National Weather Service Great Falls MT 907 PM MDT Sun Sep 13 2026 MTC015-027-140345- /O.CON.KTFX.SV.W.0138.000000T0000Z-260914T0345Z/ Fergus MT-Chouteau MT- 907 PM MDT Sun Sep 13 2026 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM MDT FOR NORTHWESTERN FERGUS AND SOUTHEASTERN CHOUTEAU COUNTIES... At 906 PM MDT, a severe thunderstorm was located 8 miles east of Geraldine, or 30 miles southeast of Fort Benton, moving northeast at 35 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. Locations impacted include... Judith Landing and Iliad. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4752 11008 4765 11023 4794 10980 4763 10950 TIME...MOT...LOC 0306Z 238DEG 32KT 4761 11008 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...1.00 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...<50 MPH $$ RCG  444 WGUS75 KTWC 140311 FFSTWC Flash Flood Statement National Weather Service Tucson AZ 811 PM MST Sun Sep 13 2026 AZC003-140400- /O.CON.KTWC.FF.W.0202.000000T0000Z-260914T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Cochise AZ- 811 PM MST Sun Sep 13 2026 ...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 9 PM MST THIS EVENING FOR SOUTHERN COCHISE COUNTY... At 811 PM MST, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 1 and 2 inches of rain have fallen. Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Radar indicated. IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas. Some locations that will experience flash flooding include... Mainly rural areas of Southern Cochise County. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be aware of your surroundings and do not drive on flooded roads. && LAT...LON 3147 10962 3147 10969 3138 10972 3136 10964 3136 10959 3145 10961 FLASH FLOOD...RADAR INDICATED $$ GLZ  631 WGUS75 KTWC 140312 FFSTWC Flash Flood Statement National Weather Service Tucson AZ 812 PM MST Sun Sep 13 2026 AZC003-140445- /O.CON.KTWC.FF.W.0203.000000T0000Z-260914T0445Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Cochise AZ- 812 PM MST Sun Sep 13 2026 ...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 945 PM MST THIS EVENING FOR SOUTHEASTERN COCHISE COUNTY... At 812 PM MST, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 0.7 and 1.2 inches of rain have fallen. Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Radar indicated. IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas. Some locations that will experience flash flooding include... Douglas and Pirtleville. This includes the following highways... Route 80 between mile markers 363 and 370. Route 191 between mile markers 1 and 3. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be aware of your surroundings and do not drive on flooded roads. && LAT...LON 3140 10959 3140 10952 3133 10951 3133 10960 3136 10961 3136 10959 3140 10960 FLASH FLOOD...RADAR INDICATED $$ GLZ  873 WWUS55 KTFX 140316 SVSTFX Severe Weather Statement National Weather Service Great Falls MT 916 PM MDT Sun Sep 13 2026 MTC015-027-140345- /O.CON.KTFX.SV.W.0138.000000T0000Z-260914T0345Z/ Fergus MT-Chouteau MT- 916 PM MDT Sun Sep 13 2026 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM MDT FOR NORTHWESTERN FERGUS AND SOUTHEASTERN CHOUTEAU COUNTIES... At 916 PM MDT, a severe thunderstorm was located 14 miles east of Geraldine, or 34 miles east of Fort Benton, moving northeast at 35 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. Locations impacted include... Judith Landing and Iliad. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4756 10998 4768 11017 4794 10980 4763 10950 TIME...MOT...LOC 0316Z 238DEG 32KT 4766 10996 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...1.00 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...<50 MPH $$ RCG  190 WWUS55 KTFX 140323 SVSTFX Severe Weather Statement National Weather Service Great Falls MT 923 PM MDT Sun Sep 13 2026 MTC015-027-140345- /O.CON.KTFX.SV.W.0138.000000T0000Z-260914T0345Z/ Fergus MT-Chouteau MT- 923 PM MDT Sun Sep 13 2026 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM MDT FOR NORTHWESTERN FERGUS AND EAST CENTRAL CHOUTEAU COUNTIES... At 923 PM MDT, a severe thunderstorm was located 19 miles east of Geraldine, or 35 miles south of Big Sandy, moving northeast at 35 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. Locations impacted include... Judith Landing and Iliad. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4762 10987 4773 11004 4794 10980 4766 10953 TIME...MOT...LOC 0323Z 238DEG 32KT 4769 10988 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...1.00 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...<50 MPH $$ RCG  303 WGUS75 KFGZ 140324 FFSFGZ Flash Flood Statement National Weather Service Flagstaff AZ 824 PM MST Sun Sep 13 2026 AZC017-140334- /O.EXP.KFGZ.FF.W.0162.000000T0000Z-260914T0330Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Navajo AZ- 824 PM MST Sun Sep 13 2026 /924 PM MDT Sun Sep 13 2026/ ...FLASH FLOOD WARNING FOR COTTONWOOD WASH NEAR WINSLOW WILL EXPIRE AT 830 PM MST /930 PM MDT/ THIS EVENING FOR NAVAJO COUNTY... The heavy rain has ended. Flash flooding is no longer expected to pose a threat. && LAT...LON 3526 11017 3524 11015 3517 11019 3513 11023 3511 11030 3505 11033 3498 11035 3499 11041 3501 11047 3498 11063 3501 11061 3505 11052 3507 11044 3514 11037 3519 11025 $$ McCollum  357 WUUS55 KTFX 140328 SVRTFX MTC015-045-140415- /O.NEW.KTFX.SV.W.0139.260914T0328Z-260914T0415Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Great Falls MT 928 PM MDT Sun Sep 13 2026 The National Weather Service in Great Falls has issued a * Severe Thunderstorm Warning for... Northwestern Judith Basin County in central Montana... South central Chouteau County in north central Montana... * Until 1015 PM MDT. * At 928 PM MDT, a severe thunderstorm was located 12 miles southwest of Geyser, or 24 miles west of Stanford, moving northeast at 35 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. * Locations impacted include... Geyser and Raynesford. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4722 11004 4708 11064 4709 11065 4710 11077 4730 11079 4736 11076 4736 11064 4745 11064 4759 11040 4743 11018 4741 11022 4737 11022 4736 11013 4727 11013 4727 11008 TIME...MOT...LOC 0328Z 236DEG 32KT 4719 11073 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...1.00 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...<50 MPH $$ RCG  933 WWUS55 KTFX 140330 SVSTFX Severe Weather Statement National Weather Service Great Falls MT 930 PM MDT Sun Sep 13 2026 MTC015-027-140345- /O.CON.KTFX.SV.W.0138.000000T0000Z-260914T0345Z/ Fergus MT-Chouteau MT- 930 PM MDT Sun Sep 13 2026 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM MDT FOR NORTHWESTERN FERGUS AND EAST CENTRAL CHOUTEAU COUNTIES... At 930 PM MDT, a severe thunderstorm was located 22 miles northwest of Winifred, or 34 miles southeast of Big Sandy, moving northeast at 35 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. Locations impacted include... Judith Landing and Iliad. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4767 10982 4780 10996 4794 10980 4770 10957 TIME...MOT...LOC 0330Z 238DEG 32KT 4772 10980 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...1.00 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...<50 MPH $$ RCG  699 WWUS55 KTFX 140338 SVSTFX Severe Weather Statement National Weather Service Great Falls MT 938 PM MDT Sun Sep 13 2026 MTC015-027-140347- /O.EXP.KTFX.SV.W.0138.000000T0000Z-260914T0345Z/ Fergus MT-Chouteau MT- 938 PM MDT Sun Sep 13 2026 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN FERGUS AND EAST CENTRAL CHOUTEAU COUNTIES WILL EXPIRE AT 945 PM MDT... The storm which prompted the warning is moving out of the area. Therefore, the warning will be allowed to expire. However, small hail is still possible with this thunderstorm. && LAT...LON 4767 10982 4780 10996 4794 10980 4770 10957 TIME...MOT...LOC 0337Z 238DEG 32KT 4774 10975 $$ RCG  046 WWUS55 KTFX 140339 SVSTFX Severe Weather Statement National Weather Service Great Falls MT 939 PM MDT Sun Sep 13 2026 MTC015-045-140415- /O.CON.KTFX.SV.W.0139.000000T0000Z-260914T0415Z/ Judith Basin MT-Chouteau MT- 939 PM MDT Sun Sep 13 2026 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM MDT FOR NORTHWESTERN JUDITH BASIN AND SOUTH CENTRAL CHOUTEAU COUNTIES... At 939 PM MDT, a severe thunderstorm was located near Geyser, or 19 miles west of Stanford, moving northeast at 35 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. Locations impacted include... Geyser. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4727 11013 4716 11055 4716 11058 4719 11065 4729 11073 4733 11070 4736 11064 4745 11064 4759 11040 4743 11018 4741 11022 4737 11022 4736 11013 TIME...MOT...LOC 0339Z 236DEG 32KT 4725 11061 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...1.00 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...<50 MPH $$ RCG