Active AlertsBoone

The National Weather Service in Des Moines has issued a Severe Thunderstorm Warning for Story County in central Iowa Boone County in central Iowa Until 800 AM CDT. At 719 AM CDT, a severe thunderstorm was located over Perry, moving east at 55 mph.
Hazard: 60 mph wind gusts and nickel size hail.
Source: Radar indicated.
Impact: Expect damage to roofs, siding, and trees. Locations impacted include Ames, Boone, Nevada, Story City, Huxley, Madrid, Slater, Roland, Gilbert, Woodward, Iowa State Center, Boone Speedway, Maxwell, Cambridge, McCallsburg, Sheldahl, Kelley, Pilot Mound, Luther, and Fraser. This includes Interstate 35 between mile markers 102 and 126.

For your protection move to an interior room on the lowest floor of a building.

SEVERE THUNDERSTORM WATCH 310 REMAINS VALID UNTIL 10 AM CDT THIS MORNING FOR THE FOLLOWING AREAS IN IOWA THIS WATCH INCLUDES 28 COUNTIES IN CENTRAL IOWA BOONE DALLAS GRUNDY HAMILTON HARDIN MARSHALL POLK STORY TAMA WEBSTER IN NORTHEAST IOWA BLACK HAWK IN SOUTH CENTRAL IOWA CLARKE DECATUR MADISON RINGGOLD UNION WARREN IN SOUTHWEST IOWA ADAIR ADAMS CASS TAYLOR IN WEST CENTRAL IOWA AUDUBON CALHOUN CARROLL CRAWFORD GREENE GUTHRIE SAC THIS INCLUDES THE CITIES OF ACKLEY, ADAIR, ADEL, AMES, ATLANTIC, AUDUBON, BAYARD, BEDFORD, BOONE, CARLISLE, CARROLL, CASEY, CEDAR FALLS, CONRAD, CORNING, CRESTON, DENISON, DES MOINES, DIKE, DYSART, EARLHAM, EARLY, ELDORA, EXIRA, FONTANELLE, FORT DODGE, GLADBROOK, GREENFIELD, GRUNDY CENTER, GUTHRIE CENTER, INDIANOLA, IOWA FALLS, JEFFERSON, LAKE CITY, LAKE VIEW, LAMONI, LENOX, LEON, MANSON, MARSHALLTOWN, MOUNT AYR, NEW MARKET, NORWALK, ODEBOLT, OSCEOLA, PANORA, PERRY, POMEROY, REINBECK, ROCKWELL CITY, SAC CITY, SCHALLER, STUART, TAMA, TOLEDO, TRAER, WALL LAKE, WATERLOO, WAUKEE, WEBSTER CITY, WELLSBURG, AND WINTERSET.
Primary Threats Include: SCATTERED LARGE HAIL LIKELY WITH ISOLATED VERY LARGE HAIL EVENTS TO 3 INCHES IN DIAMETER POSSIBLE. ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE. A TORNADO OR TWO POSSIBLE.

At 739 AM CDT, a severe thunderstorm capable of producing a tornado was located over Sheldahl, or 11 miles southwest of Ames, 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 Huxley and Kelley around 745 AM CDT. Other locations impacted by this tornadic thunderstorm include Big Creek State Park, Kelley, Sheldahl, and Alleman. This includes Interstate 35 between mile markers 99 and 104.

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. This cluster of thunderstorms is capable of producing tornadoes and widespread significant wind damage. Do not wait to see or hear the tornado. For your protection move to an interior room on the lowest floor of a building.