961 WWUS53 KDMX 171000 SVSDMX Severe Weather Statement National Weather Service Des Moines IA 500 AM CDT Wed Jun 17 2026 IAC015-025-073-079-187-171015- /O.CON.KDMX.SV.W.0231.000000T0000Z-260617T1015Z/ Greene IA-Webster IA-Calhoun IA-Hamilton IA-Boone IA- 500 AM CDT Wed Jun 17 2026 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 AM CDT FOR NORTHEASTERN GREENE...WEBSTER...EASTERN CALHOUN...WESTERN HAMILTON AND NORTHWESTERN BOONE COUNTIES... At 500 AM CDT, a severe thunderstorm was located over Dayton, or 14 miles south of Fort Dodge, moving east at 55 mph. HAZARD...70 mph wind gusts and half dollar size hail. SOURCE...Emergency management. IMPACT...Hail damage to vehicles is expected. Expect considerable tree damage. Wind damage is also likely to mobile homes, roofs, and outbuildings. Locations impacted include... Fort Dodge, Webster City, Manson, Gowrie, Fort Dodge Regional Airport, Dayton, Stratford, Coalville, Otho, Lehigh, Duncombe, Callender, Farnhamville, Harcourt, Paton, Boxholm, Barnum, Pilot Mound, Moorland, and Woolstock. PRECAUTIONARY/PREPAREDNESS ACTIONS... Prepare immediately for large hail and damaging winds. People outside should move to a shelter, inside a strong building and away from windows. && LAT...LON 4256 9455 4256 9373 4207 9396 4221 9453 TIME...MOT...LOC 1000Z 283DEG 49KT 4230 9408 THUNDERSTORM DAMAGE THREAT...CONSIDERABLE HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...1.25 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...70 MPH $$ Donavon 512 WWUS53 KDMX 171003 SVSDMX Severe Weather Statement National Weather Service Des Moines IA 503 AM CDT Wed Jun 17 2026 IAC015-079-083-127-169-171045- /O.CON.KDMX.SV.W.0232.000000T0000Z-260617T1045Z/ Story IA-Hardin IA-Marshall IA-Hamilton IA-Boone IA- 503 AM CDT Wed Jun 17 2026 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 AM CDT FOR STORY...HARDIN...WESTERN MARSHALL...HAMILTON AND NORTHEASTERN BOONE COUNTIES... At 503 AM CDT, a severe thunderstorm was located near Stanhope, or 14 miles northeast of Boone, moving east at 60 mph. HAZARD...70 mph wind gusts and quarter size hail. SOURCE...The Webster City airport recorded 76 mph wind. IMPACT...Hail damage to vehicles is expected. Expect considerable tree damage. Wind damage is also likely to mobile homes, roofs, and outbuildings. Locations impacted include... Ames, Boone, Webster City, Nevada, Iowa Falls, Eldora, Story City, State Center, Roland, Jewell Junction, Gilbert, Iowa State Center, Colo, Hubbard, Melbourne, Alden, Zearing, Radcliffe, Ellsworth, and Stanhope. This includes Interstate 35 between mile markers 110 and 148. PRECAUTIONARY/PREPAREDNESS ACTIONS... Prepare immediately for large hail and damaging winds. People outside should move to a shelter, inside a strong building and away from windows. && LAT...LON 4187 9312 4207 9399 4255 9378 4249 9303 4247 9303 4247 9301 TIME...MOT...LOC 1003Z 292DEG 54KT 4225 9376 THUNDERSTORM DAMAGE THREAT...CONSIDERABLE HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...1.00 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...70 MPH $$ Donavon 177 WWUS53 KDMX 171036 SVSDMX Severe Weather Statement National Weather Service Des Moines IA 536 AM CDT Wed Jun 17 2026 IAC015-073-079-187-171046- /O.EXP.KDMX.SV.W.0233.000000T0000Z-260617T1045Z/ Greene IA-Webster IA-Hamilton IA-Boone IA- 536 AM CDT Wed Jun 17 2026 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN GREENE... SOUTHEASTERN WEBSTER...WESTERN HAMILTON AND NORTHWESTERN BOONE COUNTIES WILL EXPIRE AT 545 AM CDT... 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 will be allowed to expire. A Severe Thunderstorm Watch remains in effect until 1100 AM CDT for central and west central Iowa. LAT...LON 4251 9378 4207 9397 4212 9416 4222 9430 4247 9426 TIME...MOT...LOC 1036Z 289DEG 45KT 4228 9385 $$ Donavon 473 WWUS53 KDMX 171045 SVSDMX Severe Weather Statement National Weather Service Des Moines IA 545 AM CDT Wed Jun 17 2026 IAC099-127-169-171-171115- /O.CON.KDMX.SV.W.0234.000000T0000Z-260617T1115Z/ Story IA-Marshall IA-Tama IA-Jasper IA- 545 AM CDT Wed Jun 17 2026 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 AM CDT FOR EAST CENTRAL STORY...MARSHALL...SOUTHWESTERN TAMA AND NORTHEASTERN JASPER COUNTIES... At 545 AM CDT, a severe thunderstorm was located over Marshalltown, moving southeast at 45 mph. THIS IS A DESTRUCTIVE STORM! The Marshalltown airport recorded a wind gust to 76 mph. HAZARD...80 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Flying debris will be dangerous to those caught without shelter. Mobile homes will be heavily damaged. Expect considerable damage to roofs, windows, and vehicles. Extensive tree damage and power outages are likely. Locations impacted include... Marshalltown, Newton, State Center, Meskwaki Casino, Rock Creek Lake, Le Grand, Melbourne, Kellogg, Garwin, Gilman, Albion, Rhodes, Liscomb, Montour, Laurel, Haverhill, Clemons, Ferguson, Green Mountain, and Marshalltown Municipal Airport. This includes Interstate 80 between mile markers 169 and 171. PRECAUTIONARY/PREPAREDNESS ACTIONS... This is a DANGEROUS SITUATION. This storm is producing widespread wind damage!. SEEK SHELTER NOW inside a sturdy structure and stay away from windows. && LAT...LON 4164 9296 4206 9330 4221 9302 4221 9285 4212 9252 TIME...MOT...LOC 1045Z 297DEG 39KT 4206 9291 THUNDERSTORM DAMAGE THREAT...DESTRUCTIVE HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...0.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...80 MPH $$ Donavon 184 WWUS53 KDMX 171058 SVSDMX Severe Weather Statement National Weather Service Des Moines IA 558 AM CDT Wed Jun 17 2026 IAC099-127-169-171-171115- /O.CON.KDMX.SV.W.0234.000000T0000Z-260617T1115Z/ Story IA-Marshall IA-Tama IA-Jasper IA- 558 AM CDT Wed Jun 17 2026 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 AM CDT FOR EASTERN STORY...MARSHALL...SOUTHWESTERN TAMA AND NORTHEASTERN JASPER COUNTIES... At 557 AM CDT, a severe thunderstorm was located near Le Grand, or 6 miles southeast of Marshalltown, moving southeast at 40 mph. THIS IS A DESTRUCTIVE STORM! HAZARD...80 mph wind gusts and penny size hail. SOURCE...Emergency management. IMPACT...Flying debris will be dangerous to those caught without shelter. Mobile homes will be heavily damaged. Expect considerable damage to roofs, windows, and vehicles. Extensive tree damage and power outages are likely. Locations impacted include... Marshalltown, Newton, State Center, Meskwaki Casino, Rock Creek Lake, Le Grand, Melbourne, Kellogg, Garwin, Gilman, Albion, Rhodes, Montour, Laurel, Haverhill, Ferguson, Green Mountain, Marshalltown Municipal Airport, Union Grove State Park, and Rock Creek State Park. This includes Interstate 80 between mile markers 169 and 171. PRECAUTIONARY/PREPAREDNESS ACTIONS... This is a DANGEROUS SITUATION. This storm is producing widespread wind damage! SEEK SHELTER NOW inside a sturdy structure and stay away from windows. && LAT...LON 4164 9296 4201 9325 4214 9302 4221 9285 4212 9252 TIME...MOT...LOC 1057Z 318DEG 36KT 4197 9281 THUNDERSTORM DAMAGE THREAT...DESTRUCTIVE HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...0.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...80 MPH $$ Donavon 237 WWUS53 KDMX 171059 SVSDMX Severe Weather Statement National Weather Service Des Moines IA 559 AM CDT Wed Jun 17 2026 IAC015-171109- /O.CAN.KDMX.SV.W.0235.000000T0000Z-260617T1115Z/ Boone IA- 559 AM CDT Wed Jun 17 2026 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BOONE COUNTY IS CANCELLED... The severe thunderstorm which prompted the warning has moved out of the warned area. Therefore, the warning has been cancelled. A Severe Thunderstorm Watch remains in effect until 1100 AM CDT for central and south central Iowa. LAT...LON 4164 9295 4151 9361 4180 9377 4201 9324 TIME...MOT...LOC 1059Z 316DEG 35KT 4180 9332 $$ IAC099-127-153-169-171115- /O.CON.KDMX.SV.W.0235.000000T0000Z-260617T1115Z/ Polk IA-Story IA-Marshall IA-Jasper IA- 559 AM CDT Wed Jun 17 2026 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 AM CDT FOR POLK...SOUTHEASTERN STORY...SOUTHWESTERN MARSHALL AND NORTHWESTERN JASPER COUNTIES... At 559 AM CDT, a severe thunderstorm was located near Mingo, or 13 miles northeast of Altoona, moving southeast at 40 mph. HAZARD...60 mph wind gusts and nickel size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Des Moines, Ankeny, Johnston, Newton, Altoona, Pleasant Hill, Carlisle, Bondurant, Polk City, Huxley, Saylorville, Mitchellville, Colfax, Prairie City, Baxter, Southridge Mall, Saylorville Lake, Adventureland Amusement Park, Iowa Events Center, and Iowa Speedway. This includes the following highways... Interstate 35 between mile markers 87 and 102. Interstate 80 between mile markers 132 and 168. Interstate 235 between mile markers 7 and 14. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4164 9295 4151 9361 4180 9377 4201 9324 TIME...MOT...LOC 1059Z 316DEG 35KT 4180 9332 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...0.88 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ Donavon