409 WWUS53 KOAX 150604 SVSOAX Severe Weather Statement National Weather Service Omaha/Valley Nebraska 104 AM CDT Tue Sep 15 2026 IAC085-155-165-150700- /O.CON.KOAX.SV.W.0429.000000T0000Z-260915T0700Z/ Pottawattamie IA-Harrison IA-Shelby IA- 104 AM CDT Tue Sep 15 2026 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 AM CDT FOR NORTHERN POTTAWATTAMIE...SOUTHEASTERN HARRISON AND SOUTHERN SHELBY COUNTIES... At 103 AM CDT, a severe thunderstorm was located 7 miles southeast of Missouri Valley, or 18 miles northeast of Omaha, moving east at 40 mph. HAZARD...70 mph wind gusts. SOURCE...Personal weather station near Shelby measured a 73 MPH wind gust. IMPACT...Expect considerable tree damage. Damage is likely to mobile homes, roofs, and outbuildings. Locations impacted include... Harlan, Logan, Avoca, Neola, Walnut, Shelby, Minden, Persia, Portsmouth, Tennant, Prairie Rose State Park, Nishna Bend Recreation Area, Elk Horn Creek Recreation Area, Jacksonville, Arrowhead Park, and Historical Village Welcome Center. This includes Interstate 80 in Iowa between mile markers 20 and 48. 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 4151 9515 4150 9516 4141 9516 4140 9582 4167 9589 4172 9509 4160 9509 4160 9504 4151 9504 TIME...MOT...LOC 0603Z 264DEG 35KT 4150 9578 THUNDERSTORM DAMAGE THREAT...CONSIDERABLE HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...OBSERVED MAX WIND GUST...70 MPH $$ Chehak 892 WWUS53 KOAX 150605 SVSOAX Severe Weather Statement National Weather Service Omaha/Valley Nebraska 105 AM CDT Tue Sep 15 2026 IAC085-155-NEC177-150615- /O.EXP.KOAX.SV.W.0428.000000T0000Z-260915T0615Z/ Pottawattamie IA-Harrison IA-Washington NE- 105 AM CDT Tue Sep 15 2026 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN POTTAWATTAMIE... SOUTHWESTERN HARRISON AND SOUTHEASTERN WASHINGTON COUNTIES WILL EXPIRE AT 115 AM CDT... The storm which prompted the warning has moved out of the area. Therefore, the warning will be allowed to expire. && LAT...LON 4142 9581 4139 9608 4156 9610 4164 9587 TIME...MOT...LOC 0605Z 261DEG 38KT 4150 9576 $$ Chehak 534 WWUS53 KOAX 150619 SVSOAX Severe Weather Statement National Weather Service Omaha/Valley Nebraska 119 AM CDT Tue Sep 15 2026 IAC085-155-165-150700- /O.CON.KOAX.SV.W.0429.000000T0000Z-260915T0700Z/ Pottawattamie IA-Harrison IA-Shelby IA- 119 AM CDT Tue Sep 15 2026 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 AM CDT FOR NORTHEASTERN POTTAWATTAMIE...SOUTHEASTERN HARRISON AND SOUTHERN SHELBY COUNTIES... At 119 AM CDT, a severe thunderstorm was located 3 miles north of Minden, or 15 miles southwest of Harlan, moving east at 40 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Harlan, Avoca, Neola, Walnut, Shelby, Minden, Persia, Portsmouth, Tennant, Prairie Rose State Park, Nishna Bend Recreation Area, Elk Horn Creek Recreation Area, Jacksonville, and Arrowhead Park. This includes Interstate 80 in Iowa between mile markers 20 and 48. 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 4151 9515 4150 9516 4141 9516 4140 9564 4168 9569 4172 9509 4160 9509 4160 9504 4151 9504 TIME...MOT...LOC 0619Z 264DEG 35KT 4152 9557 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ Chehak 509 WWUS53 KOAX 150631 SVSOAX Severe Weather Statement National Weather Service Omaha/Valley Nebraska 131 AM CDT Tue Sep 15 2026 IAC085-150641- /O.CAN.KOAX.SV.W.0429.000000T0000Z-260915T0700Z/ Harrison IA- 131 AM CDT Tue Sep 15 2026 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN HARRISON COUNTY IS CANCELLED... The severe thunderstorm which prompted the warning has moved out of the warned area. Therefore, the warning has been cancelled. && LAT...LON 4151 9515 4150 9516 4141 9516 4140 9547 4169 9551 4172 9509 4160 9509 4160 9504 4151 9504 TIME...MOT...LOC 0631Z 264DEG 35KT 4153 9541 $$ IAC155-165-150700- /O.CON.KOAX.SV.W.0429.000000T0000Z-260915T0700Z/ Pottawattamie IA-Shelby IA- 131 AM CDT Tue Sep 15 2026 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 AM CDT FOR NORTHEASTERN POTTAWATTAMIE AND SOUTHERN SHELBY COUNTIES... At 131 AM CDT, a severe thunderstorm was located near Shelby, or 9 miles southwest of Harlan, moving east at 40 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Harlan, Avoca, Walnut, Shelby, Tennant, Prairie Rose State Park, Nishna Bend Recreation Area, Elk Horn Creek Recreation Area, and Jacksonville. This includes Interstate 80 in Iowa between mile markers 34 and 48. 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 4151 9515 4150 9516 4141 9516 4140 9547 4169 9551 4172 9509 4160 9509 4160 9504 4151 9504 TIME...MOT...LOC 0631Z 264DEG 35KT 4153 9541 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ Chehak 383 WWUS53 KOAX 150647 SVSOAX Severe Weather Statement National Weather Service Omaha/Valley Nebraska 147 AM CDT Tue Sep 15 2026 IAC155-165-150700- /O.CON.KOAX.SV.W.0429.000000T0000Z-260915T0700Z/ Pottawattamie IA-Shelby IA- 147 AM CDT Tue Sep 15 2026 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 AM CDT FOR NORTHEASTERN POTTAWATTAMIE AND SOUTHEASTERN SHELBY COUNTIES... At 147 AM CDT, a severe thunderstorm was located 4 miles north of Walnut, or 10 miles southeast of Harlan, moving east at 40 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Walnut, Prairie Rose State Park, Elk Horn Creek Recreation Area, and Jacksonville. This includes Interstate 80 in Iowa between mile markers 46 and 48. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4151 9515 4150 9516 4141 9516 4141 9523 4171 9525 4172 9509 4160 9509 4160 9504 4151 9504 TIME...MOT...LOC 0647Z 263DEG 36KT 4155 9519 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ Chehak 314 WWUS53 KOAX 150650 SVSOAX Severe Weather Statement National Weather Service Omaha/Valley Nebraska 150 AM CDT Tue Sep 15 2026 IAC155-165-150700- /O.EXP.KOAX.SV.W.0429.000000T0000Z-260915T0700Z/ Pottawattamie IA-Shelby IA- 150 AM CDT Tue Sep 15 2026 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN POTTAWATTAMIE AND SOUTHEASTERN SHELBY COUNTIES WILL EXPIRE AT 200 AM CDT... The storm which prompted the warning has moved out of the area. Therefore, the warning will be allowed to expire. However, heavy rain is still possible with this thunderstorm. && LAT...LON 4151 9515 4150 9516 4141 9516 4141 9523 4171 9525 4172 9509 4160 9509 4160 9504 4151 9504 TIME...MOT...LOC 0650Z 264DEG 35KT 4155 9517 $$ Chehak