511 FZUS71 KLWX 170819 MWSLWX Marine Weather Statement National Weather Service Baltimore MD/Washington DC 419 AM EDT Wed Jun 17 2026 ANZ534-536-537-170915- 419 AM EDT Wed Jun 17 2026 ...A STRONG THUNDERSTORM OVER THE LOWER TIDAL POTOMAC WATERS... The areas affected include... Chesapeake Bay from Drum Point MD to Smith Point VA... Tidal Potomac from Cobb Island MD to Smith Point VA... Tidal Potomac from Indian Head to Cobb Island MD... At 418 AM EDT, Doppler radar indicated a strong thunderstorm, capable of producing winds to around 30 knots. This thunderstorm was located near Nomini Bay, moving east at 30 knots. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners can expect gusty winds to around 30 knots, locally higher waves, and lightning strikes. Boaters should seek safe harbor immediately until this storm passes. && LAT...LON 3815 7661 3817 7676 3816 7684 3818 7687 3824 7663 3823 7658 3815 7652 3813 7646 3814 7636 3825 7642 3829 7640 3832 7627 3813 7621 3811 7660 $$ KLW  548 WUUS53 KFSD 170826 SVRFSD IAC021-035-170900- /O.NEW.KFSD.SV.W.0118.260617T0826Z-260617T0900Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Sioux Falls SD 326 AM CDT Wed Jun 17 2026 The National Weather Service in Sioux Falls has issued a * Severe Thunderstorm Warning for... Northeastern Cherokee County in northwestern Iowa... Buena Vista County in northwestern Iowa... * Until 400 AM CDT. * At 326 AM CDT, a severe thunderstorm was located near Cherokee, moving east at 60 mph. HAZARD...Ping pong ball size hail. SOURCE...Radar indicated. IMPACT...People and animals outdoors will be injured. Expect damage to roofs, siding, windows, and vehicles. * This severe thunderstorm will be near... Alta and Aurelia around 330 AM CDT. Storm Lake, Lakeside, and Truesdale around 335 AM CDT. Newell around 345 AM CDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. To report severe weather, contact your nearest law enforcement agency. They will send your report to the National Weather Service office in Sioux Falls. && LAT...LON 4256 9529 4269 9565 4290 9559 4284 9491 4260 9490 4257 9492 TIME...MOT...LOC 0826Z 289DEG 51KT 4275 9549 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...1.50 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...<50 MPH $$ Dux  942 WWUS53 KFSD 170836 SVSFSD Severe Weather Statement National Weather Service Sioux Falls SD 336 AM CDT Wed Jun 17 2026 IAC021-035-170900- /O.CON.KFSD.SV.W.0118.000000T0000Z-260617T0900Z/ Cherokee IA-Buena Vista IA- 336 AM CDT Wed Jun 17 2026 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 AM CDT FOR NORTHEASTERN CHEROKEE AND BUENA VISTA COUNTIES... At 336 AM CDT, a severe thunderstorm was located 7 miles north of Alta, or 10 miles northwest of Storm Lake, moving east at 60 mph. HAZARD...Ping pong ball size hail. SOURCE...Radar indicated. IMPACT...People and animals outdoors will be injured. Expect damage to roofs, siding, windows, and vehicles. This severe storm will be near... Storm Lake, Alta, and Truesdale around 340 AM CDT. Albert City around 345 AM CDT. Other locations in the path of this severe thunderstorm include Newell. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. To report severe weather contact your nearest law enforcement agency. They will send your report to the National Weather Service office in Sioux Falls. && LAT...LON 4260 9526 4271 9555 4289 9545 4284 9491 4260 9490 4257 9492 TIME...MOT...LOC 0836Z 284DEG 52KT 4277 9531 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...1.50 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...<50 MPH $$ Dux  776 WWUS53 KFSD 170846 SVSFSD Severe Weather Statement National Weather Service Sioux Falls SD 346 AM CDT Wed Jun 17 2026 IAC021-035-170900- /O.CON.KFSD.SV.W.0118.000000T0000Z-260617T0900Z/ Cherokee IA-Buena Vista IA- 346 AM CDT Wed Jun 17 2026 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 AM CDT FOR EAST CENTRAL CHEROKEE AND BUENA VISTA COUNTIES... At 346 AM CDT, a severe thunderstorm was located near Truesdale, or 7 miles northeast of Storm Lake, moving east at 60 mph. HAZARD...Ping pong ball size hail. SOURCE...Radar indicated. IMPACT...People and animals outdoors will be injured. Expect damage to roofs, siding, windows, and vehicles. This severe storm will be near... Newell and Albert City around 350 AM CDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. To report severe weather contact your nearest law enforcement agency. They will send your report to the National Weather Service office in Sioux Falls. && LAT...LON 4260 9526 4269 9549 4287 9524 4284 9491 4260 9490 4257 9492 TIME...MOT...LOC 0846Z 284DEG 52KT 4274 9512 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...1.50 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...<50 MPH $$ Dux  637 WUUS53 KDMX 170853 SVRDMX IAC025-151-161-170945- /O.NEW.KDMX.SV.W.0230.260617T0853Z-260617T0945Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Des Moines IA 353 AM CDT Wed Jun 17 2026 The National Weather Service in Des Moines has issued a * Severe Thunderstorm Warning for... Southern Pocahontas County in northwestern Iowa... Northeastern Sac County in west central Iowa... Calhoun County in west central Iowa... * Until 445 AM CDT. * At 352 AM CDT, a severe thunderstorm was located over Newell, or 8 miles east of Storm Lake, moving southeast at 60 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. * Locations impacted include... Pocahontas, Rockwell City, Manson, South Twin Lake, North Twin Lake, Pomeroy, Fonda, Lohrville, Twin Lakes, Palmer, Varina, Knierim, Rinard, Jolley, Pocahontas Municipal Airport, Twin Lakes State Park, and Rockwell City Municipal Airport. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4256 9492 4283 9491 4269 9444 4221 9444 4256 9511 TIME...MOT...LOC 0852Z 295DEG 52KT 4265 9503 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...1.25 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ Donavon  816 WWUS53 KFSD 170858 SVSFSD Severe Weather Statement National Weather Service Sioux Falls SD 358 AM CDT Wed Jun 17 2026 IAC021-035-170907- /O.EXP.KFSD.SV.W.0118.000000T0000Z-260617T0900Z/ Cherokee IA-Buena Vista IA- 358 AM CDT Wed Jun 17 2026 ...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL CHEROKEE AND BUENA VISTA COUNTIES WILL EXPIRE AT 400 AM CDT... The storm which prompted the warning has moved out of the area. Therefore, the warning will be allowed to expire. However, gusty winds are still possible with this thunderstorm. A Severe Thunderstorm Watch remains in effect until 1100 AM CDT for northwestern Iowa. To report severe weather, contact your nearest law enforcement agency. They will relay your report to the National Weather Service Sioux Falls. && LAT...LON 4260 9526 4269 9549 4287 9524 4284 9491 4260 9490 4257 9492 TIME...MOT...LOC 0857Z 289DEG 51KT 4270 9495 $$ Dux