Storm Events Database

Event Details

Event Hail
Magnitude 0.88 in.
State IOWA
County/Area PALO ALTO
WFO DMX
Report Source Broadcast Media
NCDC Data Source CSV
Begin Date 2007-06-21 13:31:00.0 CST-6
Begin Location 1SE EMMETSBURG
Begin Lat/Lon 43.11/-94.68
End Date 2007-06-21 13:31:00.0 CST-6
Deaths Direct/Indirect 0/0 (fatality details below, when available...)
Injuries Direct/Indirect 0/0
Property Damage 2.00K
Crop Damage 5.00K
Episode Narrative A warm, moist, and unstable airmass was in place over Iowa on the afternoon of the 21st. A Warm front lifted north into the state with temperatures rising into the upper 80s to low 90s south of it with dew point temperatures in the upper 60s to low 70s. This combination produced most unstable CAPE values in the 3000 to 4000 J/kg range and lifted indices in the -9 C. range. The environment was not strongly sheared with 25 to 35 kts of effective shear. The freezing level was quite high at 14,700 feet. In spite of this, there was plenty of cape in the -10 to -30 C. layer of the atmosphere, with 500 J/kg available. The LFC in the 1200 to 2000 meter range. The MCS developed rapidly and move east-southeast across Iowa. Many of the storms produced significant hail, with hail size ranging from nickel to over tennis ball size. Two and one half inch diameter hail fell north of Renwick in Humboldt County. Golf ball size hail fell in Hancock County in the Corwith area. The largest hail occurred during the first couple hours of the systems development. Most of the hail was in the three quarter to one inch diameter range later on. Four tornadoes were reported with the system. All of the were brief touchdowns however and caused little damage. One touched down in Wright County near Eagle Grove. Two others touched down in Butler County one west of Shell Rock, the other north of Steamboat Rock. The fourth tornado touched down northwest of Kelly in Story County. The final tornado touched down on the south side of Waterloo in Black Hawk County. Many of the storms produced strong winds of at least 45 to 50 MPH. There were several reports of winds in excess of 60 MPH however. Numerous trees were blown down and a few power poles snapped. Winds caused damage in the Poweshiek County with winds estemated at near 80 MPH.
Event Narrative


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All events for this episode:

Location County/Zone St. Date Time T.Z. Type Mag Dth Inj PrD CrD
Totals: 0 0 465.00K 244.00K
EMMETSBURG PALO ALTO CO. IA 06/21/2007 13:31 CST-6 Hail 0.88 in. 0 0 2.00K 5.00K
BANCROFT KOSSUTH CO. IA 06/21/2007 13:42 CST-6 Hail 1.25 in. 0 0 10.00K 5.00K
VAIL CRAWFORD CO. IA 06/21/2007 13:42 CST-6 Hail 0.75 in. 0 0 0.00K 5.00K
CORWITH HANCOCK CO. IA 06/21/2007 13:52 CST-6 Hail 1.75 in. 0 0 25.00K 5.00K
CORWITH HANCOCK CO. IA 06/21/2007 14:00 CST-6 Hail 2.00 in. 0 0 15.00K 5.00K
CORWITH HANCOCK CO. IA 06/21/2007 14:00 CST-6 Hail 1.75 in. 0 0 25.00K 5.00K
CORWITH HANCOCK CO. IA 06/21/2007 14:04 CST-6 Hail 1.75 in. 0 0 15.00K 5.00K
VAIL CRAWFORD CO. IA 06/21/2007 14:09 CST-6 Hail 0.75 in. 0 0 0.00K 5.00K
CORWITH HANCOCK CO. IA 06/21/2007 14:10 CST-6 Hail 1.75 in. 0 0 15.00K 5.00K
RENWICK HUMBOLDT CO. IA 06/21/2007 14:11 CST-6 Hail 1.75 in. 0 0 25.00K 5.00K
RENWICK HUMBOLDT CO. IA 06/21/2007 14:11 CST-6 Hail 0.75 in. 0 0 0.00K 5.00K
FLORENCE WRIGHT CO. IA 06/21/2007 14:15 CST-6 Hail 1.75 in. 0 0 15.00K 5.00K
FLORENCE WRIGHT CO. IA 06/21/2007 14:15 CST-6 Hail 1.75 in. 0 0 15.00K 5.00K
RENWICK HUMBOLDT CO. IA 06/21/2007 14:15 CST-6 Hail 2.00 in. 0 0 25.00K 5.00K
CORWITH HANCOCK CO. IA 06/21/2007 14:20 CST-6 Hail 1.75 in. 0 0 15.00K 5.00K
RENWICK HUMBOLDT CO. IA 06/21/2007 14:20 CST-6 Hail 2.50 in. 0 0 40.00K 10.00K
APLINGTON BUTLER CO. IA 06/21/2007 14:30 CST-6 Hail 1.00 in. 0 0 5.00K 5.00K
FLORENCE WRIGHT CO. IA 06/21/2007 14:30 CST-6 Hail 2.00 in. 0 0 25.00K 5.00K
WASHBURN BLACK HAWK CO. IA 06/21/2007 14:35 CST-6 Hail 0.75 in. 0 0 0.00K 5.00K
CEDAR FALLS BLACK HAWK CO. IA 06/21/2007 14:47 CST-6 Hail 0.88 in. 0 0 2.00K 5.00K
KESLEY BUTLER CO. IA 06/21/2007 14:51 CST-6 Tornado EF0 0 0 0.00K 1.00K
BUTLER CENTER BUTLER CO. IA 06/21/2007 14:52 CST-6 Funnel Cloud 0 0 0.00K 0.00K
HOLMES WRIGHT CO. IA 06/21/2007 14:55 CST-6 Tornado EF0 0 0 0.00K 2.00K
PT PLEASANT HARDIN CO. IA 06/21/2007 14:55 CST-6 Thunderstorm Wind 61 kts. EG 0 0 3.00K 0.00K
ATLANTIC CASS CO. IA 06/21/2007 15:00 CST-6 Hail 0.88 in. 0 0 2.00K 5.00K
JEFFERSON GREENE CO. IA 06/21/2007 15:00 CST-6 Hail 0.88 in. 0 0 2.00K 5.00K
SCRANTON GREENE CO. IA 06/21/2007 15:00 CST-6 Hail 0.88 in. 0 0 2.00K 5.00K
GREENE BUTLER CO. IA 06/21/2007 15:11 CST-6 Hail 1.00 in. 0 0 5.00K 5.00K
ADAIR GUTHRIE CO. IA 06/21/2007 15:15 CST-6 Hail 0.75 in. 0 0 0.00K 5.00K
MASSENA CASS CO. IA 06/21/2007 15:18 CST-6 Hail 0.88 in. 0 0 2.00K 5.00K
ATLANTIC CASS CO. IA 06/21/2007 15:20 CST-6 Thunderstorm Wind 57 kts. EG 0 0 15.00K 0.00K
ADAIR ADAIR CO. IA 06/21/2007 15:21 CST-6 Thunderstorm Wind 50 kts. MG 0 0 1.00K 0.00K
SHELL ROCK BUTLER CO. IA 06/21/2007 15:24 CST-6 Tornado EF0 0 0 0.00K 2.00K
STANHOPE HAMILTON CO. IA 06/21/2007 15:31 CST-6 Hail 0.75 in. 0 0 0.00K 5.00K
FONTANELLE ADAIR CO. IA 06/21/2007 15:32 CST-6 Thunderstorm Wind 58 kts. MG 0 0 10.00K 0.00K
HOWE ADAIR CO. IA 06/21/2007 15:36 CST-6 Hail 0.75 in. 0 0 0.00K 5.00K
STANHOPE HAMILTON CO. IA 06/21/2007 15:41 CST-6 Hail 0.75 in. 0 0 0.00K 5.00K
WATERLOO BLACK HAWK CO. IA 06/21/2007 15:44 CST-6 Funnel Cloud 0 0 0.00K 0.00K
FISK ADAIR CO. IA 06/21/2007 15:45 CST-6 Hail 0.88 in. 0 0 2.00K 5.00K
SCRANTON GREENE CO. IA 06/21/2007 15:45 CST-6 Hail 0.88 in. 0 0 2.00K 5.00K
PANTHER DALLAS CO. IA 06/21/2007 15:49 CST-6 Hail 0.88 in. 0 0 2.00K 5.00K
POLK CITY POLK CO. IA 06/21/2007 15:51 CST-6 Thunderstorm Wind 52 kts. EG 0 0 5.00K 0.00K
GRANGER DALLAS CO. IA 06/21/2007 15:53 CST-6 Hail 0.75 in. 0 0 0.00K 5.00K
DE SOTO DALLAS CO. IA 06/21/2007 15:55 CST-6 Thunderstorm Wind 56 kts. EG 0 0 10.00K 0.00K
ANKENY POLK CO. IA 06/21/2007 15:57 CST-6 Thunderstorm Wind 52 kts. EG 0 0 5.00K 0.00K
KELLEY STORY CO. IA 06/21/2007 15:58 CST-6 Tornado EF0 0 0 0.00K 2.00K
BOONEVILLE DALLAS CO. IA 06/21/2007 16:01 CST-6 Hail 1.00 in. 0 0 5.00K 5.00K
BOONEVILLE DALLAS CO. IA 06/21/2007 16:07 CST-6 Hail 1.00 in. 0 0 5.00K 5.00K
DES MOINES POLK CO. IA 06/21/2007 16:14 CST-6 Thunderstorm Wind 52 kts. EG 0 0 5.00K 0.00K
CASTLE HILL BLACK HAWK CO. IA 06/21/2007 16:22 CST-6 Tornado EF0 0 0 0.00K 2.00K
WATERLOO RANCH ARPT BLACK HAWK CO. IA 06/21/2007 16:28 CST-6 Thunderstorm Wind 61 kts. EG 0 0 10.00K 0.00K
WATERLOO BLACK HAWK CO. IA 06/21/2007 16:30 CST-6 Thunderstorm Wind 52 kts. EG 0 0 10.00K 0.00K
NEWTON JASPER CO. IA 06/21/2007 16:32 CST-6 Hail 0.75 in. 0 0 0.00K 5.00K
ST MARYS WARREN CO. IA 06/21/2007 16:32 CST-6 Hail 0.88 in. 0 0 2.00K 5.00K
ST CHARLES MADISON CO. IA 06/21/2007 16:35 CST-6 Hail 1.00 in. 0 0 2.00K 5.00K
BOONEVILLE DALLAS CO. IA 06/21/2007 16:37 CST-6 Hail 1.00 in. 0 0 5.00K 5.00K
NEW VIRGINIA WARREN CO. IA 06/21/2007 16:37 CST-6 Thunderstorm Wind 52 kts. EG 0 0 5.00K 0.00K
BAXTER JASPER CO. IA 06/21/2007 16:38 CST-6 Thunderstorm Wind 52 kts. EG 0 0 5.00K 0.00K
ST MARYS WARREN CO. IA 06/21/2007 16:40 CST-6 Hail 0.88 in. 0 0 2.00K 5.00K
MEDORA WARREN CO. IA 06/21/2007 16:55 CST-6 Hail 1.00 in. 0 0 5.00K 5.00K
COOL WARREN CO. IA 06/21/2007 17:00 CST-6 Hail 1.00 in. 0 0 5.00K 5.00K
LEIGHTON MAHASKA CO. IA 06/21/2007 17:07 CST-6 Hail 0.50 in. 0 0 0.00K 5.00K
BROOKLYN POWESHIEK CO. IA 06/21/2007 17:18 CST-6 Thunderstorm Wind 70 kts. EG 0 0 50.00K 0.00K
LE ROY DECATUR CO. IA 06/21/2007 17:30 CST-6 Hail 0.75 in. 0 0 0.00K 5.00K
WEST GROVE DAVIS CO. IA 06/21/2007 18:39 CST-6 Hail 0.88 in. 0 0 2.00K 5.00K
BLOOMFIELD DAVIS CO. IA 06/21/2007 18:52 CST-6 Hail 1.00 in. 0 0 5.00K 5.00K
Totals: 0 0 465.00K 244.00K