311 WHHW50 PHFO 151409 SMWHFO PHZ122-124-151615- /O.NEW.PHFO.MA.W.0045.260315T1409Z-260315T1615Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Special Marine Warning National Weather Service Honolulu HI 409 AM HST Sun Mar 15 2026 The National Weather Service in Honolulu has issued a * Special Marine Warning for... Big Island Southeast Waters... Big Island Windward Waters... * Until 615 AM HST. * At 408 AM HST, a line of severe thunderstorms capable of producing waterspouts was located 21 nm southeast of FAD Buoy KH, or 25 nm southeast of Isaac Hale Beach Park, moving northeast at 35 knots. HAZARD...Waterspouts and wind gusts to nearly 50 knots. SOURCE...Radar. IMPACT...Waterspouts can easily overturn boats and create locally hazardous seas. Small craft could be damaged in briefly higher winds and suddenly higher waves. * The severe thunderstorm will remain over mainly open waters. PRECAUTIONARY/PREPAREDNESS ACTIONS... Prepare for gusty winds, steep and fast-building seas, and blinding downpours. Stay low or go below, and make sure all on board are wearing life jackets. Thunderstorms can produce sudden waterspouts. Waterspouts can easily overturn boats and create locally hazardous seas. Seek safe harbor immediately. && LAT...LON 1829 15591 1875 15566 1979 15420 1943 15415 1915 15424 1900 15436 1878 15465 1861 15504 1847 15516 1830 15541 1825 15576 TIME...MOT...LOC 1408Z 224DEG 37KT 1911 15460 WATERSPOUT...POSSIBLE HAIL...0.00IN WIND...49KTS $$ Gibbs  326 WUUS53 KDVN 151419 SVRDVN IAC103-115-183-151445- /O.NEW.KDVN.SV.W.0036.260315T1419Z-260315T1445Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Quad Cities IA/IL 919 AM CDT Sun Mar 15 2026 The National Weather Service in the Quad Cities has issued a * Severe Thunderstorm Warning for... Northwestern Louisa County in southeastern Iowa... Southeastern Johnson County in east central Iowa... Northeastern Washington County in southeastern Iowa... * Until 945 AM CDT. * At 919 AM CDT, a severe thunderstorm was located over Richmond, or 8 miles north of Washington, moving northeast at 50 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. * Locations impacted include... Iowa City, Washington, Kalona, Lone Tree, Riverside, Hills, Richmond, Hills Access, Oasis, River Junction, and Gladwin. This includes Interstate 80 in Iowa between mile markers 250 and 253. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a sturdy building. Continuous cloud to ground lightning is occurring with this storm. Move indoors immediately. Lightning is one of nature's leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning. && LAT...LON 4171 9137 4138 9137 4130 9174 4143 9182 TIME...MOT...LOC 1419Z 237DEG 45KT 4142 9167 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...1.00 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...<50 MPH $$ Gibbs  952 WWUS53 KDVN 151424 SVSDVN Severe Weather Statement National Weather Service Quad Cities IA/IL 924 AM CDT Sun Mar 15 2026 IAC103-115-183-151445- /O.CON.KDVN.SV.W.0036.000000T0000Z-260315T1445Z/ Louisa IA-Johnson IA-Washington IA- 924 AM CDT Sun Mar 15 2026 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 AM CDT FOR NORTHWESTERN LOUISA...SOUTHEASTERN JOHNSON AND NORTHEASTERN WASHINGTON COUNTIES... At 923 AM CDT, a severe thunderstorm was located over Riverside, or 11 miles south of Iowa City, moving northeast at 55 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. Locations impacted include... Iowa City, Kalona, Lone Tree, Riverside, Hills, Richmond, Hills Access, Oasis, and River Junction. This includes Interstate 80 in Iowa between mile markers 250 and 253. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a sturdy building. Continuous cloud to ground lightning is occurring with this storm. Move indoors immediately. Lightning is one of nature's leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning. && LAT...LON 4171 9137 4141 9137 4136 9173 4146 9177 TIME...MOT...LOC 1423Z 232DEG 49KT 4149 9159 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...1.00 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...<50 MPH $$ Gibbs  261 WWUS53 KDVN 151427 SVSDVN Severe Weather Statement National Weather Service Quad Cities IA/IL 927 AM CDT Sun Mar 15 2026 IAC115-151437- /O.CAN.KDVN.SV.W.0036.000000T0000Z-260315T1445Z/ Louisa IA- 927 AM CDT Sun Mar 15 2026 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN LOUISA COUNTY IS CANCELLED... The severe thunderstorm which prompted the warning has moved out of the warned area. Therefore, the warning has been cancelled. && LAT...LON 4171 9137 4145 9137 4141 9165 4150 9170 TIME...MOT...LOC 1427Z 232DEG 49KT 4152 9154 $$ IAC103-183-151445- /O.CON.KDVN.SV.W.0036.000000T0000Z-260315T1445Z/ Johnson IA-Washington IA- 927 AM CDT Sun Mar 15 2026 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 AM CDT FOR SOUTHEASTERN JOHNSON AND NORTHEASTERN WASHINGTON COUNTIES... At 927 AM CDT, a severe thunderstorm was located over Hills Access, or 9 miles south of Iowa City, moving northeast at 55 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. Locations impacted include... Iowa City, Kalona, Lone Tree, Riverside, Hills, Hills Access, Oasis, and River Junction. This includes Interstate 80 in Iowa between mile markers 250 and 253. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a sturdy building. Continuous cloud to ground lightning is occurring with this storm. Move indoors immediately. Lightning is one of nature's leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning. && LAT...LON 4171 9137 4145 9137 4141 9165 4150 9170 TIME...MOT...LOC 1427Z 232DEG 49KT 4152 9154 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...1.00 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...<50 MPH $$ Gibbs  765 WWUS53 KDVN 151433 SVSDVN Severe Weather Statement National Weather Service Quad Cities IA/IL 933 AM CDT Sun Mar 15 2026 IAC103-183-151445- /O.CON.KDVN.SV.W.0036.000000T0000Z-260315T1445Z/ Johnson IA-Washington IA- 933 AM CDT Sun Mar 15 2026 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 AM CDT FOR SOUTHEASTERN JOHNSON AND NORTHEASTERN WASHINGTON COUNTIES... At 933 AM CDT, a severe thunderstorm was located near Hills Access, or 7 miles southeast of Iowa City, moving northeast at 50 mph. HAZARD...60 mph wind gusts and quarter size hail. SOURCE...Radar indicated. IMPACT...Hail damage to vehicles is expected. Expect wind damage to roofs, siding, and trees. Locations impacted include... Iowa City, Lone Tree, Riverside, Hills, Hills Access, Oasis, and River Junction. This includes Interstate 80 in Iowa between mile markers 250 and 253. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a sturdy building. Continuous cloud to ground lightning is occurring with this storm. Move indoors immediately. Lightning is one of nature's leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning. && LAT...LON 4171 9137 4150 9137 4146 9157 4155 9163 TIME...MOT...LOC 1433Z 237DEG 45KT 4157 9145 TORNADO...POSSIBLE HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...1.00 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ Gibbs  179 WUUS53 KDVN 151439 SVRDVN IAC031-139-151530- /O.NEW.KDVN.SV.W.0037.260315T1439Z-260315T1530Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Quad Cities IA/IL 939 AM CDT Sun Mar 15 2026 The National Weather Service in the Quad Cities has issued a * Severe Thunderstorm Warning for... Cedar County in east central Iowa... Northwestern Muscatine County in east central Iowa... * Until 1030 AM CDT. * At 939 AM CDT, a severe thunderstorm was located near West Branch, moving northeast at 55 mph. HAZARD...60 mph wind gusts and quarter size hail. SOURCE...Radar indicated. IMPACT...Hail damage to vehicles is expected. Expect wind damage to roofs, siding, and trees. * Locations impacted include... Tipton, West Branch, Stanwood, West Liberty, Lowden, Bennett, Atalissa, Rochester, Buchanan, Clarence, Springdale, Cedar Valley, Muscatine County Fairgrounds, Massillon Park, Cedar Bluff, Bennett Park, Sunbury, Cedar Valley Park, Herbert Hoover National Historic Site, and Tipton Matthews Airport. This includes Interstate 80 in Iowa between mile markers 254 and 278. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain alert for a possible tornado! Tornadoes can develop quickly from severe thunderstorms. If you spot a tornado go at once into the basement or small central room in a sturdy structure. For your protection move to an interior room on the lowest floor of a sturdy building. Continuous cloud to ground lightning is occurring with this storm. Move indoors immediately. Lightning is one of nature's leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning. && LAT...LON 4195 9090 4163 9090 4153 9137 4176 9137 4195 9115 TIME...MOT...LOC 1439Z 228DEG 49KT 4164 9140 TORNADO...POSSIBLE HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...1.00 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ Gibbs  129 WWUS53 KDVN 151443 SVSDVN Severe Weather Statement National Weather Service Quad Cities IA/IL 943 AM CDT Sun Mar 15 2026 IAC031-139-151530- /O.CON.KDVN.SV.W.0037.000000T0000Z-260315T1530Z/ Cedar IA-Muscatine IA- 943 AM CDT Sun Mar 15 2026 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 AM CDT FOR CEDAR AND NORTHWESTERN MUSCATINE COUNTIES... At 942 AM CDT, a severe thunderstorm was located over West Branch, moving northeast at 55 mph. HAZARD...Ping pong ball size hail and 60 mph wind gusts. SOURCE...Trained weather spotters. IMPACT...People and animals outdoors will be injured. Expect hail damage to roofs, siding, windows, and vehicles. Expect wind damage to roofs, siding, and trees. Locations impacted include... Tipton, West Branch, Stanwood, West Liberty, Lowden, Bennett, Atalissa, Rochester, Buchanan, Clarence, Springdale, Cedar Valley, Muscatine County Fairgrounds, Massillon Park, Cedar Bluff, Bennett Park, Sunbury, Cedar Valley Park, Herbert Hoover National Historic Site, and Tipton Matthews Airport. This includes Interstate 80 in Iowa between mile markers 254 and 278. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain alert for a possible tornado! Tornadoes can develop quickly from severe thunderstorms. If you spot a tornado go at once into the basement or small central room in a sturdy structure. For your protection move to an interior room on the lowest floor of a sturdy building. Continuous cloud to ground lightning is occurring with this storm. Move indoors immediately. Lightning is one of nature's leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning. && LAT...LON 4195 9090 4163 9090 4153 9137 4176 9137 4195 9115 TIME...MOT...LOC 1442Z 228DEG 49KT 4167 9135 TORNADO...POSSIBLE HAIL THREAT...OBSERVED MAX HAIL SIZE...1.50 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ Gibbs  622 WWUS53 KDVN 151443 RRA SVSDVN Severe Weather Statement National Weather Service Quad Cities IA/IL 943 AM CDT Sun Mar 15 2026 IAC103-183-151453- /O.EXP.KDVN.SV.W.0036.000000T0000Z-260315T1445Z/ Johnson IA-Washington IA- 943 AM CDT Sun Mar 15 2026 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN JOHNSON AND NORTHEASTERN WASHINGTON COUNTIES WILL EXPIRE AT 945 AM CDT... The storm which prompted the warning has moved out of the area. Therefore, the warning will be allowed to expire. && LAT...LON 4171 9137 4150 9137 4146 9157 4155 9163 TIME...MOT...LOC 1443Z 237DEG 45KT 4163 9132 $$ Gibbs  383 WWUS53 KDVN 151448 SVSDVN Severe Weather Statement National Weather Service Quad Cities IA/IL 948 AM CDT Sun Mar 15 2026 IAC139-151457- /O.CAN.KDVN.SV.W.0037.000000T0000Z-260315T1530Z/ Muscatine IA- 948 AM CDT Sun Mar 15 2026 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN MUSCATINE COUNTY IS CANCELLED... The severe thunderstorm which prompted the warning has moved out of the warned area. Therefore, the warning has been cancelled. && LAT...LON 4195 9090 4169 9090 4161 9137 4176 9137 4195 9115 TIME...MOT...LOC 1447Z 228DEG 49KT 4172 9127 $$ IAC031-151530- /O.CON.KDVN.SV.W.0037.000000T0000Z-260315T1530Z/ Cedar IA- 948 AM CDT Sun Mar 15 2026 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 AM CDT FOR CEDAR COUNTY... At 947 AM CDT, a severe thunderstorm was located over Cedar Valley, or near West Branch, moving northeast at 55 mph. HAZARD...60 mph wind gusts and quarter size hail. SOURCE...Trained weather spotters. IMPACT...Hail damage to vehicles is expected. Expect wind damage to roofs, siding, and trees. Locations impacted include... Tipton, West Branch, Stanwood, Lowden, Bennett, Rochester, Buchanan, Clarence, Springdale, Cedar Valley, Massillon Park, Cedar Bluff, Bennett Park, Cedar Valley Park, Herbert Hoover National Historic Site, Tipton Matthews Airport, and Cedar County Fairgrounds. This includes Interstate 80 in Iowa between mile markers 254 and 264. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a sturdy building. Continuous cloud to ground lightning is occurring with this storm. Move indoors immediately. Lightning is one of nature's leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning. && LAT...LON 4195 9090 4169 9090 4161 9137 4176 9137 4195 9115 TIME...MOT...LOC 1447Z 228DEG 49KT 4172 9127 HAIL THREAT...OBSERVED MAX HAIL SIZE...1.00 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ Gibbs