Storm Events Database

Event Details

Event Flash Flood
-- Flood Cause Heavy Rain
State IOWA
County/Area GRUNDY
WFO DMX
Report Source Law Enforcement
NCDC Data Source CSV
Begin Date 2008-04-25 05:00:00.0 CST-6
Begin Location 1W REINBECK
Begin Lat/Lon 42.32/-92.62
End Date 2008-04-25 10:00:00.0 CST-6
End Location 0W REINBECK
End Lat/Lon 42.32/-92.61
Deaths Direct/Indirect 0/0 (fatality details below, when available...)
Injuries Direct/Indirect 0/0
Property Damage 10.00K
Crop Damage 0.00K
Episode Narrative A strong push of moist and unstable air moved into Iowa during the day on the 24th. Surface temperatures warmed into the low to mid 70s over much of western and southern Iowa with dew point temperatures in the low to mid 60s. A cold front approached the state from the northwest during the evening. The airmass was quite unstable with surface based lifted indices around -4 C. and most unstable CAPE around 2000 J/kg. The shear was not real strong, but there was 30 to 40 kts of effective shear available. CAPE in the -10 to -30 C. layer of the atmosphere was in the 200 to 300 J/kg range with 700 to 800 J/kg of DCAPE available. The freezing level was relatively low, around 10,500 to 11,000 feet. Thunderstorms erupted ahead of the approaching cold front. Many of the storms produced hail with severe hail, with several reports of three quarter to one inch diameter hail reported from Audubon County northeast to Worth County, and east to Black Hawk County. Golf ball size hail fell in Wright County south of the Dows area. This was one of the larger reports. A 60 MPH wind gust was reported as the storms moved through Hardin County. One other report of high winds was received from Black Hawk County, where a pole shed was damaged. The LCL was relatively low, in the 500 to 1000 meter range. One tornado was reported north of Bancroft in Kossuth County early in the event. A second tornado touched down in Hamilton County and caused tree damage and minor shed damage on 3 farms. It was reported in an open area with little to no damage. The shear values were strongest in that area as well. The bulk of the severe weather moved out of the CWA just as a strong surface low pressure system begin to lift northeast along the advancing cold front. A new round of severe weather moved into southwest Iowa and then into parts of central Iowa. The severe weather from this second round was in the form of three quarter to one inch diameter hail. Over the northeast part of the CWA, the main problem was with flooding and flash flooding. Rainfall over the northeast quarter of the CWA was in the 3 to 4 inch range, with spotty amounts as high as 5 inches in the Denver area. Roads were washed out in numerous locations scattered from Tama County, north and northwest to Franklin County. The areal flooding transitioned to significant river flooding, which will be addressed in a separate entry.
Event Narrative Six inches of water was over the road due to flooding from Black Hawk Creek.


     ‚Äč



All events for this episode:

Location County/Zone St. Date Time T.Z. Type Mag Dth Inj PrD CrD
Totals: 0 0 1.571M 0.00K
GERLED KOSSUTH CO. IA 04/24/2008 15:47 CST-6 Tornado EF0 0 0 0.00K 0.00K
LU VERNE KOSSUTH CO. IA 04/24/2008 17:24 CST-6 Hail 0.75 in. 0 0 0.00K 0.00K
FISCUS AUDUBON CO. IA 04/24/2008 18:01 CST-6 Hail 0.88 in. 0 0 0.00K 0.00K
ROSS AUDUBON CO. IA 04/24/2008 18:17 CST-6 Hail 0.75 in. 0 0 0.00K 0.00K
MANLY WORTH CO. IA 04/24/2008 19:19 CST-6 Hail 0.88 in. 0 0 1.00K 0.00K
STONEGA HAMILTON CO. IA 04/24/2008 19:21 CST-6 Tornado EF0 0 0 50.00K 0.00K
JEFFERSON GREENE CO. IA 04/24/2008 19:25 CST-6 Hail 0.88 in. 0 0 1.00K 0.00K
BLAIRSBURG HAMILTON CO. IA 04/24/2008 19:35 CST-6 Thunderstorm Wind 61 kts. EG 0 0 5.00K 0.00K
DOWS WRIGHT CO. IA 04/24/2008 19:44 CST-6 Hail 1.75 in. 0 0 10.00K 0.00K
BLAIRSBURG HAMILTON CO. IA 04/24/2008 19:50 CST-6 Thunderstorm Wind 57 kts. EG 0 0 5.00K 0.00K
IOWA FALLS HARDIN CO. IA 04/24/2008 20:00 CST-6 Thunderstorm Wind 52 kts. EG 0 0 1.00K 0.00K
CLARKSVILLE BUTLER CO. IA 04/24/2008 21:03 CST-6 Hail 0.88 in. 0 0 1.00K 0.00K
WAVERLY BREMER CO. IA 04/24/2008 21:30 CST-6 Flash Flood 0 0 100.00K 0.00K
WATERLOO BLACK HAWK CO. IA 04/24/2008 22:10 CST-6 Thunderstorm Wind 52 kts. EG 0 0 5.00K 0.00K
GLADBROOK TAMA CO. IA 04/25/2008 00:30 CST-6 Flash Flood 0 0 10.00K 0.00K
LORIMOR UNION CO. IA 04/25/2008 02:20 CST-6 Hail 0.88 in. 0 0 1.00K 0.00K
ELLSTON RINGGOLD CO. IA 04/25/2008 02:29 CST-6 Hail 0.88 in. 0 0 1.00K 0.00K
NEW VIRGINIA WARREN CO. IA 04/25/2008 02:50 CST-6 Hail 0.75 in. 0 0 0.00K 0.00K
SPRING HILL WARREN CO. IA 04/25/2008 02:56 CST-6 Hail 1.00 in. 0 0 2.00K 0.00K
SPRING HILL WARREN CO. IA 04/25/2008 02:56 CST-6 Hail 1.00 in. 0 0 3.00K 0.00K
CEDAR FALLS BLACK HAWK CO. IA 04/25/2008 03:00 CST-6 Flash Flood 0 0 20.00K 0.00K
LIBERTY CENTER WARREN CO. IA 04/25/2008 03:09 CST-6 Hail 1.00 in. 0 0 1.00K 0.00K
AVON POLK CO. IA 04/25/2008 03:11 CST-6 Hail 0.88 in. 0 0 1.00K 0.00K
LIBERTY CENTER WARREN CO. IA 04/25/2008 03:17 CST-6 Hail 1.00 in. 0 0 3.00K 0.00K
BUCKEYE HARDIN CO. IA 04/25/2008 04:00 CST-6 Flash Flood 0 0 25.00K 0.00K
DENVER BREMER CO. IA 04/25/2008 05:00 CST-6 Flash Flood 0 0 100.00K 0.00K
REINBECK GRUNDY CO. IA 04/25/2008 05:00 CST-6 Flash Flood 0 0 10.00K 0.00K
BUTLER CENTER BUTLER CO. IA 04/25/2008 06:00 CST-6 Flash Flood 0 0 10.00K 0.00K
BEEDS LAKE ARPT FRANKLIN CO. IA 04/25/2008 07:00 CST-6 Flash Flood 0 0 10.00K 0.00K
CEDAR FALLS ISLEY AR BLACK HAWK CO. IA 04/25/2008 07:28 CST-6 Flash Flood 0 0 10.00K 0.00K
IOWA FALLS MUNI ARPT HARDIN CO. IA 04/25/2008 08:30 CST-6 Flash Flood 0 0 5.00K 0.00K
WELLSBURG GRUNDY CO. IA 04/25/2008 08:50 CST-6 Flash Flood 0 0 10.00K 0.00K
GLADBROOK TAMA CO. IA 04/25/2008 09:00 CST-6 Flood 0 0 10.00K 0.00K
GLADBROOK TAMA CO. IA 04/25/2008 09:00 CST-6 Flood 0 0 25.00K 0.00K
GLADBROOK TAMA CO. IA 04/25/2008 09:00 CST-6 Flood 0 0 10.00K 0.00K
PIONEER HUMBOLDT CO. IA 04/25/2008 09:58 CST-6 Flood 0 0 100.00K 0.00K
ACKLEY MUNI ARPT HARDIN CO. IA 04/25/2008 10:00 CST-6 Flood 0 0 150.00K 0.00K
CEDAR FALLS ISLEY AR BLACK HAWK CO. IA 04/25/2008 10:00 CST-6 Flood 0 0 20.00K 0.00K
FLORENCE WRIGHT CO. IA 04/25/2008 10:00 CST-6 Flood 0 0 100.00K 0.00K
PARKERSBURG BUTLER CO. IA 04/25/2008 10:00 CST-6 Flood 0 0 10.00K 0.00K
PLAINFIELD BREMER CO. IA 04/25/2008 10:00 CST-6 Flood 0 0 200.00K 0.00K
SHEFFIELD FRANKLIN CO. IA 04/25/2008 10:00 CST-6 Flood 0 0 100.00K 0.00K
WELLSBURG GRUNDY CO. IA 04/25/2008 10:00 CST-6 Flood 0 0 150.00K 0.00K
HUDSON BLACK HAWK CO. IA 04/25/2008 14:30 CST-6 Flood 0 0 20.00K 0.00K
VOORHIES BLACK HAWK CO. IA 04/25/2008 16:38 CST-6 Flood 0 0 250.00K 0.00K
DUNKERTON BLACK HAWK CO. IA 04/25/2008 18:22 CST-6 Flood 0 0 25.00K 0.00K
Totals: 0 0 1.571M 0.00K