186 WWUS53 KDMX 131102 SVSDMX Severe Weather Statement National Weather Service Des Moines IA 602 AM CDT Thu Aug 13 2026 IAC073-131115- /O.CON.KDMX.TO.W.0076.000000T0000Z-260813T1115Z/ Greene IA- 602 AM CDT Thu Aug 13 2026 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 615 AM CDT FOR CENTRAL GREENE COUNTY... At 602 AM CDT, a severe thunderstorm capable of producing a tornado was located near Churdan, or 6 miles northwest of Jefferson, moving northeast at 35 mph. HAZARD...Tornado. SOURCE...Radar indicated rotation. IMPACT...Flying debris will be dangerous to those caught without shelter. Mobile homes will be damaged or destroyed. Damage to roofs, windows, and vehicles will occur. Tree damage is likely. This dangerous storm will be near... Paton around 615 AM CDT. Other locations impacted by this tornadic thunderstorm include Dana, Churdan, Grand Junction, Jefferson Municipal Airport, Paton, and Rippey. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER NOW! Move to a basement or an interior room on the lowest floor of a sturdy building. Avoid windows. If you are outdoors, in a mobile home, or in a vehicle, move to the closest substantial shelter and protect yourself from flying debris. && LAT...LON 4193 9433 4205 9457 4220 9457 4220 9417 4194 9418 TIME...MOT...LOC 1102Z 226DEG 32KT 4210 9444 TORNADO...RADAR INDICATED MAX HAIL SIZE...0.00 IN $$ Hahn  528 WWUS53 KDMX 131106 SVSDMX Severe Weather Statement National Weather Service Des Moines IA 606 AM CDT Thu Aug 13 2026 IAC027-131115- /O.CAN.KDMX.SV.W.0321.000000T0000Z-260813T1130Z/ Carroll IA- 606 AM CDT Thu Aug 13 2026 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CARROLL COUNTY IS CANCELLED... The storms which prompted the warning have moved out of the warned area. Therefore, the warning has been cancelled. A Severe Thunderstorm Watch remains in effect until 800 AM CDT for west central Iowa. A Severe Thunderstorm Watch also remains in effect until 1100 AM CDT for central Iowa. LAT...LON 4187 9439 4206 9458 4219 9371 4193 9370 4152 9383 4164 9452 TIME...MOT...LOC 1105Z 265DEG 49KT 4214 9466 4194 9416 4156 9444 $$ IAC015-049-073-077-153-131130- /O.CON.KDMX.SV.W.0321.000000T0000Z-260813T1130Z/ Polk IA-Greene IA-Guthrie IA-Boone IA-Dallas IA- 606 AM CDT Thu Aug 13 2026 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 AM CDT FOR NORTHWESTERN POLK...SOUTHERN GREENE...NORTHEASTERN GUTHRIE... BOONE AND DALLAS COUNTIES... At 605 AM CDT, severe thunderstorms were located along a line extending from near Hobbs County Park to near Rippey to near Menlo, moving east at 55 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... West Des Moines, Urbandale, Clive, Waukee, Boone, Grimes, Perry, Jefferson, Adel, Guthrie Center, Madrid, Ogden, Dallas Center, Granger, Panora, Woodward, Lake Panorama, Big Creek Lake, Boone Speedway, and Saylorville Lake. This includes Interstate 80 between mile markers 114 and 120. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4187 9439 4206 9458 4219 9371 4193 9370 4152 9383 4164 9452 TIME...MOT...LOC 1105Z 265DEG 49KT 4214 9466 4194 9416 4156 9444 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ Hahn  747 FZUS71 KGYX 131110 MWSGYX Marine Weather Statement National Weather Service Gray ME 710 AM EDT Thu Aug 13 2026 ANZ154-131145- 710 AM EDT Thu Aug 13 2026 ...A STRONG THUNDERSTORM APPROACHING THE WATERS... The areas affected include... Coastal Waters from Cape Elizabeth, ME to Merrimack River, MA out 25 NM... At 709 AM EDT, Doppler radar indicated a strong thunderstorm, capable of producing winds to around 30 knots and small hail. This thunderstorm was located over York, or near Portsmouth, moving east at 35 knots. Locations impacted include... York, Wells, and Portsmouth. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners can expect gusty winds to around 30 knots, small hail, locally higher waves, and lightning strikes. Boaters should seek safe harbor immediately until this storm passes. && LAT...LON 4310 7069 4323 7062 4324 7061 4326 7063 4334 7059 4326 7005 4291 7022 4306 7074 4309 7075 $$ JC  710 WWUS53 KDMX 131113 SVSDMX Severe Weather Statement National Weather Service Des Moines IA 613 AM CDT Thu Aug 13 2026 IAC073-131122- /O.EXP.KDMX.TO.W.0076.000000T0000Z-260813T1115Z/ Greene IA- 613 AM CDT Thu Aug 13 2026 ...THE TORNADO WARNING FOR CENTRAL GREENE COUNTY WILL EXPIRE AT 615 AM CDT... The storm which prompted the warning has weakened below severe limits, and no longer appears capable of producing a tornado. 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 800 AM CDT for west central Iowa. Remember, a Severe Thunderstorm Warning still remains in effect for central Greene County until 630 AM CDT. LAT...LON 4193 9433 4205 9457 4220 9457 4220 9417 4194 9418 TIME...MOT...LOC 1112Z 226DEG 32KT 4216 9435 $$ Hahn  040 FZUS71 KBOX 131116 MWSBOX Marine Weather Statement National Weather Service Boston/Norton MA 716 AM EDT Thu Aug 13 2026 ANZ237-255-256-282-283-131215- 716 AM EDT Thu Aug 13 2026 ...A STRONG THUNDERSTORM APPROACHING THE WATERS... The areas affected include... Block Island Sound... Coastal Waters extending out to 25 NM South of Marthas Vineyard and Nantucket... Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 NM South of Block Island... Ocean Waters from Marthas Vineyard to Nantucket from 25 to 60 NM... Ocean Waters from Montauk NY to Marthas Vineyard from 25 to 60 NM... At 715 AM EDT, Doppler radar indicated a strong thunderstorm, capable of producing winds to around 30 knots. This thunderstorm was located 12 nm southwest of The Coastal Waters South Of Marthas Vineyard, moving east at 45 knots. Locations impacted include... The Coastal Waters Southeast Of Block Island, The Coastal Waters South Of Marthas Vineyard, and Buoy 44097 Southeast Of Block Island. PRECAUTIONARY/PREPAREDNESS ACTIONS... Expect gusty winds to around 30 knots...briefly rough seas and lightning strikes. Consider heading for safe harbor until this storm passes. && LAT...LON 4129 7024 4089 6991 4076 7161 4105 7184 4107 7185 4110 7186 $$ BW  651 WWUS53 KDMX 131118 SVSDMX Severe Weather Statement National Weather Service Des Moines IA 618 AM CDT Thu Aug 13 2026 IAC073-131127- /O.CAN.KDMX.SV.W.0321.000000T0000Z-260813T1130Z/ Greene IA- 618 AM CDT Thu Aug 13 2026 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN GREENE COUNTY IS CANCELLED... The storms which prompted the warning have moved out of the warned area. Therefore, the warning has been cancelled. A Severe Thunderstorm Watch remains in effect until 800 AM CDT for west central Iowa. A Severe Thunderstorm Watch also remains in effect until 1100 AM CDT for central Iowa. LAT...LON 4187 9415 4209 9416 4219 9371 4193 9370 4152 9383 4160 9427 TIME...MOT...LOC 1117Z 265DEG 49KT 4215 9447 4195 9397 4157 9425 $$ IAC015-049-077-153-131130- /O.CON.KDMX.SV.W.0321.000000T0000Z-260813T1130Z/ Polk IA-Guthrie IA-Boone IA-Dallas IA- 618 AM CDT Thu Aug 13 2026 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 AM CDT FOR NORTHWESTERN POLK...SOUTHEASTERN GUTHRIE...BOONE AND DALLAS COUNTIES... At 617 AM CDT, severe thunderstorms were located along a line extending from Churdan to 5 miles southwest of Ledges State Park to Diamondhead Lake, moving east at 55 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... West Des Moines, Urbandale, Clive, Waukee, Boone, Grimes, Perry, Adel, Madrid, Ogden, Dallas Center, Granger, Woodward, Big Creek Lake, Boone Speedway, Saylorville Lake, Redfield, Minburn, Bouton, and Luther. This includes Interstate 80 between mile markers 114 and 120. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4187 9415 4209 9416 4219 9371 4193 9370 4152 9383 4160 9427 TIME...MOT...LOC 1117Z 265DEG 49KT 4215 9447 4195 9397 4157 9425 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ Hahn  669 WGUS75 KSLC 131126 FFSSLC Flash Flood Statement National Weather Service Salt Lake City UT 526 AM MDT Thu Aug 13 2026 UTC025-053-131215- /O.CON.KSLC.FF.W.0073.000000T0000Z-260813T1215Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Kane UT-Washington UT- 526 AM MDT Thu Aug 13 2026 ...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 AM MDT THIS MORNING FOR WEST CENTRAL KANE AND EAST CENTRAL WASHINGTON COUNTIES... At 526 AM MDT, gauge reports indicated flash flooding is occurring on the North Fork of the Virgin River. HAZARD...Life threatening flash flooding. Thunderstorms producing flash flooding. SOURCE...Gauges reported. IMPACT...Life threatening flash flooding of normally dry washes, slot canyons, streams and rivers. Some locations that will experience flash flooding include... Zion National Park. The Narrows, the Subway, Behunin Canyon, Keyhole, Pine and Spry Slot Canyons and all other slot canyons and normally dry washes in the area. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Remain alert for flooding even in locations not receiving rain. Dry washes, streams, and rivers can become raging killer currents in a matter of minutes, even from distant rainfall. && LAT...LON 3711 11290 3711 11293 3735 11311 3744 11286 3714 11271 FLASH FLOOD...GAUGE INDICATED FLASH FLOOD DAMAGE THREAT...CONSIDERABLE $$ CRK  093 WUUS53 KDMX 131127 SVRDMX IAC015-049-099-127-153-169-131215- /O.NEW.KDMX.SV.W.0322.260813T1127Z-260813T1215Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Des Moines IA 627 AM CDT Thu Aug 13 2026 The National Weather Service in Des Moines has issued a * Severe Thunderstorm Warning for... Polk County in central Iowa... Story County in central Iowa... Western Marshall County in central Iowa... Northwestern Jasper County in central Iowa... Eastern Boone County in central Iowa... Eastern Dallas County in central Iowa... * Until 715 AM CDT. * At 626 AM CDT, severe thunderstorms were located along a line extending from near Boone to Big Creek State Park to 4 miles north of Earlham, moving east at 55 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Des Moines, Ames, West Des Moines, Ankeny, Urbandale, Johnston, Clive, Altoona, Waukee, Boone, Pleasant Hill, Grimes, Nevada, Adel, Windsor Heights, Carlisle, Bondurant, Polk City, Huxley, and Saylorville. This includes the following highways... Interstate 35 between mile markers 68 and 72, and between mile markers 87 and 121. Interstate 80 between mile markers 107 and 160. Interstate 235 between mile markers 1 and 14. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4217 9316 4183 9296 4152 9336 4152 9412 4182 9394 4212 9405 TIME...MOT...LOC 1126Z 268DEG 48KT 4205 9393 4183 9377 4155 9413 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ Hahn  188 FZUS71 KLWX 131143 MWSLWX Marine Weather Statement National Weather Service Baltimore MD/Washington DC 743 AM EDT Thu Aug 13 2026 ANZ533-534-541-543-131400- Chesapeake Bay from North Beach to Drum Point MD- Chesapeake Bay from Drum Point MD to Smith Point VA- Choptank River to Cambridge MD and the Little Choptank River- Tangier Sound and the inland waters surrounding Bloodsworth Island- 743 AM EDT Thu Aug 13 2026 ...A FEW GUSTS TO NEAR 20 KNOTS THIS MORNING... Marine buoys across lower portions of the Chesapeake Bay have indicated a few gusts approaching 20 knots early this morning. These northwesterly winds may remain elevated the next couple of hours. Inexperienced mariners, especially those operating smaller vessels, should exercise extra caution if navigating the waters during this time. $$ BRO  875 WFUS53 KDMX 131144 TORDMX IAC127-169-131215- /O.NEW.KDMX.TO.W.0077.260813T1144Z-260813T1215Z/ BULLETIN - EAS ACTIVATION REQUESTED Tornado Warning National Weather Service Des Moines IA 644 AM CDT Thu Aug 13 2026 The National Weather Service in Des Moines has issued a * Tornado Warning for... Central Story County in central Iowa... Northwestern Marshall County in central Iowa... * Until 715 AM CDT. * At 643 AM CDT, a severe thunderstorm capable of producing a tornado was located over Kelley, or 5 miles south of Ames, moving northeast at 35 mph. HAZARD...Tornado. SOURCE...Radar indicated rotation. IMPACT...Flying debris will be dangerous to those caught without shelter. Mobile homes will be damaged or destroyed. Damage to roofs, windows, and vehicles will occur. Tree damage is likely. * This dangerous storm will be near... Ames, Nevada, Iowa State Center, and Ames Municipal Airport around 650 AM CDT. Other locations impacted by this tornadic thunderstorm include Zearing, Kelley, McCallsburg, Ames Municipal Airport, and Colo. This includes Interstate 35 between mile markers 106 and 124. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER NOW! Move to a basement or an interior room on the lowest floor of a sturdy building. Avoid windows. If you are outdoors, in a mobile home, or in a vehicle, move to the closest substantial shelter and protect yourself from flying debris. && LAT...LON 4190 9362 4194 9369 4218 9361 4219 9323 4196 9334 TIME...MOT...LOC 1143Z 223DEG 32KT 4195 9363 TORNADO...RADAR INDICATED MAX HAIL SIZE...<.75 IN $$ Hahn  659 WFUS53 KDMX 131148 TORDMX IAC099-127-153-169-131215- /O.NEW.KDMX.TO.W.0078.260813T1148Z-260813T1215Z/ BULLETIN - EAS ACTIVATION REQUESTED Tornado Warning National Weather Service Des Moines IA 648 AM CDT Thu Aug 13 2026 The National Weather Service in Des Moines has issued a * Tornado Warning for... Northeastern Polk County in central Iowa... Southeastern Story County in central Iowa... Western Marshall County in central Iowa... Northwestern Jasper County in central Iowa... * Until 715 AM CDT. * At 648 AM CDT, a tornado producing storm was located over Maxwell, or 8 miles south of Nevada, moving northeast at 70 mph. HAZARD...Damaging tornado. SOURCE...Radar confirmed tornado. IMPACT...Flying debris will be dangerous to those caught without shelter. Mobile homes will be damaged or destroyed. Damage to roofs, windows, and vehicles will occur. Tree damage is likely. * This tornadic storm will be near... State Center, Colo, and Collins around 655 AM CDT. Clemons around 705 AM CDT. Other locations impacted by this tornadic thunderstorm include Collins, Rhodes, St. Anthony, Maxwell, Clemons, Cambridge, and Colo. PRECAUTIONARY/PREPAREDNESS ACTIONS... To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a basement or an interior room on the lowest floor of a sturdy building. Avoid windows. If you are outdoors, in a mobile home, or in a vehicle, move to the closest substantial shelter and protect yourself from flying debris. && LAT...LON 4183 9346 4190 9354 4220 9317 4189 9310 TIME...MOT...LOC 1148Z 231DEG 62KT 4190 9341 TORNADO...OBSERVED MAX HAIL SIZE...<.75 IN $$ Hahn  978 WGUS71 KOKX 131148 FFSOKX Flash Flood Statement National Weather Service New York NY 748 AM EDT Thu Aug 13 2026 NYC103-131158- /O.CAN.KOKX.FF.W.0043.000000T0000Z-260813T1315Z/ /00000.U.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Suffolk NY- 748 AM EDT Thu Aug 13 2026 ...FLASH FLOOD WARNING IS CANCELLED FOR EASTERN SUFFOLK COUNTY... The heavy rain has ended. Flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. && LAT...LON 4101 7262 4115 7237 4119 7222 4119 7215 4110 7230 4106 7227 4105 7219 4108 7217 4104 7213 4108 7213 4110 7217 4114 7214 4111 7208 4107 7207 4101 7210 4109 7195 4108 7186 4106 7185 4088 7232 $$ DS  400 FZUS71 KGYX 131153 MWSGYX Marine Weather Statement National Weather Service Gray ME Issued by National Weather Service Caribou ME 753 AM EDT Thu Aug 13 2026 ANZ154-182-184-131300- 753 AM EDT Thu Aug 13 2026 A Marine Weather Statement has been issued for the following areas... Coastal Waters from Cape Elizabeth, ME to Merrimack River, MA out 25 NM... Waters from Cape Elizabeth ME to Merrimack River MA from 25 to 60 NM... Waters from Port Clyde ME to Cape Elizabeth ME from 25 to 60 NM... At 752 AM EDT, Doppler radar indicated a strong thunderstorm, capable of producing winds to around 30 knots and small hail. This thunderstorm was located 15 nm northeast of Jeffreys Ledge Buoy 44098, moving east at 40 knots. The strong thunderstorm will remain over mainly open waters. 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 4296 7021 4323 7013 4304 6906 4295 6913 4288 6999 $$ SM  976 WWUS53 KDMX 131155 SVSDMX Severe Weather Statement National Weather Service Des Moines IA 655 AM CDT Thu Aug 13 2026 IAC099-131205- /O.CAN.KDMX.TO.W.0078.000000T0000Z-260813T1215Z/ Jasper IA- 655 AM CDT Thu Aug 13 2026 ...THE TORNADO WARNING FOR NORTHWESTERN JASPER COUNTY IS CANCELLED... The tornadic thunderstorm which prompted the warning has moved out of the warned area. Therefore, the warning has been cancelled. A Severe Thunderstorm Watch remains in effect until 1100 AM CDT for central Iowa. LAT...LON 4186 9344 4192 9349 4220 9317 4189 9310 TIME...MOT...LOC 1155Z 237DEG 46KT 4190 9335 $$ IAC127-153-169-131215- /O.CON.KDMX.TO.W.0078.000000T0000Z-260813T1215Z/ Polk IA-Story IA-Marshall IA- 655 AM CDT Thu Aug 13 2026 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 715 AM CDT FOR NORTHEASTERN POLK...SOUTHEASTERN STORY AND WESTERN MARSHALL COUNTIES... At 655 AM CDT, a severe thunderstorm capable of producing a tornado was located over Collins, or 9 miles southeast of Nevada, moving northeast at 55 mph. HAZARD...Tornado. SOURCE...Radar indicated rotation. IMPACT...Flying debris will be dangerous to those caught without shelter. Mobile homes will be damaged or destroyed. Damage to roofs, windows, and vehicles will occur. Tree damage is likely. This dangerous storm will be near... Collins and Rhodes around 700 AM CDT. State Center around 705 AM CDT. Other locations impacted by this tornadic thunderstorm include St. Anthony, Collins, Maxwell, Rhodes, Clemons, and Colo. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER NOW! Move to a basement or an interior room on the lowest floor of a sturdy building. Avoid windows. If you are outdoors, in a mobile home, or in a vehicle, move to the closest substantial shelter and protect yourself from flying debris. && LAT...LON 4186 9344 4192 9349 4220 9317 4189 9310 TIME...MOT...LOC 1155Z 237DEG 46KT 4190 9335 TORNADO...RADAR INDICATED MAX HAIL SIZE...0.00 IN $$ Hahn