Storm Events Database

Event Details

Event Flash Flood
-- Flood Cause Heavy Rain
State IOWA
County/Area SAC
WFO DMX
Report Source Law Enforcement
NCDC Data Source CSV
Begin Date 2008-06-08 03:14:00.0 CST-6
Begin Location 1S LYTTON
Begin Lat/Lon 42.42/-94.87
End Date 2008-06-08 06:30:00.0 CST-6
End Location 0S LYTTON
End Lat/Lon 42.43/-94.87
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 Low pressure developed over Kansas with a strong southerly flow of very moist air streaming into Iowa ahead of it. Surface temperatures warmed into the 80s with dew point readings in the low to mid 70s. A semi-stationary front extended northeast from the low, across northern Iowa during the afternoon into the evening hours. The atmosphere became very unstable with MUCAPE in the 4500 to 5000 J/kg range by mid afternoon and lifted indices around -7 C. The shear was quite high, between 40 and 70 kts. Downdraft CAPW was between 1000 and 1300 J/kg with cape in the -10 to -30 C. layer of the atmosphere around 400 J/kg. The LCL was in the 750 to 1000 meter range, with the lowest over north central Iowa. With the exception of one hail report of 3 inch diameter hail report in north central Iowa, hail size was somewhat limited by the freezing level of 15500 to 16500 feet. A very strong transport of moisture took place on a 50 to 75 kt 850 mb jet. Precipitable water values soared to 1.6 to 1.9 inches by evening. During the initial phase of the severe event, high winds and hail were reported along the line of thunderstorms that formed from northern into west central Iowa. There were four reports of tornadoes in Worth, Winnebago and Cerro Gordo Counties during the afternoon hours of the 7th. This was with the initial round of storms. One of the tornadoes in Winnebago County destroyed a hog confinement building containing 3500 hogs. Several of them were killed and the remaining hogs needed to be taken to slaughter. The event transitioned into a flooding event overnight, then tornadoes began again during the afternoon of the 8th. A tornado touched down in Taylor County. Windows were blown out of houses there and several trees were twisted and blown down around the house. A pole shed was completely destroyed south of Ferguson in Marshall County. A stronger tornado was on the ground north to northeast of Ottumwa. A home lost a roof, with a wall of one room partially collapsed by the tornado. Several trees were also downed around the home. The event transitioned into a major Flood/Flash Flood event during the evening and early morning hours with many locations reporting 1 to 2 inches of rainfall, and spotty amounts of around 5 inches in just a few hours time. The line moved very little for a period of several hours. During the predawn hours, the line became broad and weakened to generally below severe limits. A new round of thunderstorms from Nebraska, which was the southwest part of the extensive line, moved into west central and southwest Iowa. The storm generally remained below severe levels for the most part, but they did produce very heavy rains. Another line of thunderstorms formed/re-intensified along the frontal boundary by the early afternoon hours. Initially, the storms produced strong winds and some small hail. As they moved southeast, several reports of high winds to near 70 MPH and a few reports of tornadoes were received. The most significant weather feature with this event was the heavy rainfall. The antecedent soil conditions in Iowa were extremely wet, such that flash flooding was caused by rainfall of an inch or more in an hour, even in rural areas. Heavy rainfall of 3 to 6 inches occurred in a broad swath extending from west central into north central, and parts of central and northeast Iowa. This resulted in widespread flash flooding. Eventually, the rain lead to major to record flooding along many of the rivers in the state. At one point or another, about 40 of the DMX 51 counties in the CWA were under flash flood warning. The situation was very serious over the north central and northeast counties. A levy was breached in the Mason City area as the Winnebago River rose to 3 feet over the record stage. The city was inundated by water. The water treatment plant was under water and non operational, all power was lost to the power grid in the city. The river cut a new channel and changed course into the downtown area. In the New Hartford area, a dam broke on Beaver Creek, resulting in the water level rising 2 feet above the all-time record level. High water along the mainstem Cedar River also caused communities to lose water. Nashua lost water as the water plant became flooded. Flooding along the Shell Rock River resulted in water supply loss in the town of Rockford. There was one death that resulted from the flooding. A 33 year old man died as he drove into flood waters in Interstate 35 at mile post 141 in Hamilton County. A second death occurred in Wright County as a 50 year old male farmer near Galt was sucked into a culvert by flood waters as he checked the field tiles in his farm field.
Event Narrative Water was over Highway 20 at Lytton.


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All events for this episode:

Location County/Zone St. Date Time T.Z. Type Mag Dth Inj PrD CrD
Totals: 2 0 4.403M 93.00K
THOMPSON WINNEBAGO CO. IA 06/07/2008 14:40 CST-6 Hail 1.00 in. 0 0 3.00K 5.00K
THOMPSON WINNEBAGO CO. IA 06/07/2008 14:41 CST-6 Tornado EF1 0 0 250.00K 10.00K
SCARVILLE WINNEBAGO CO. IA 06/07/2008 14:45 CST-6 Thunderstorm Wind 61 kts. EG 0 0 4.00K 0.00K
SCARVILLE WINNEBAGO CO. IA 06/07/2008 14:45 CST-6 Hail 1.00 in. 0 0 5.00K 5.00K
THOMPSON WINNEBAGO CO. IA 06/07/2008 14:45 CST-6 Hail 0.88 in. 0 0 1.00K 5.00K
SCARVILLE WINNEBAGO CO. IA 06/07/2008 14:48 CST-6 Funnel Cloud 0 0 0.00K 0.00K
SCARVILLE WINNEBAGO CO. IA 06/07/2008 14:50 CST-6 Thunderstorm Wind 52 kts. EG 0 0 2.00K 0.00K
SCARVILLE WINNEBAGO CO. IA 06/07/2008 14:50 CST-6 Hail 1.50 in. 0 0 10.00K 5.00K
SCARVILLE WINNEBAGO CO. IA 06/07/2008 14:55 CST-6 Hail 2.00 in. 0 0 15.00K 5.00K
SCARVILLE WINNEBAGO CO. IA 06/07/2008 14:55 CST-6 Hail 3.00 in. 0 0 15.00K 5.00K
SCARVILLE WINNEBAGO CO. IA 06/07/2008 14:55 CST-6 Hail 1.25 in. 0 0 5.00K 5.00K
SCARVILLE WINNEBAGO CO. IA 06/07/2008 14:55 CST-6 Hail 0.88 in. 0 0 1.00K 5.00K
NORTHWOOD WORTH CO. IA 06/07/2008 15:16 CST-6 Tornado EF0 0 0 0.00K 1.00K
NORTHWOOD WORTH CO. IA 06/07/2008 15:23 CST-6 Tornado EF0 0 0 5.00K 0.00K
NEILS WINNEBAGO CO. IA 06/07/2008 15:25 CST-6 Thunderstorm Wind 61 kts. EG 0 0 5.00K 0.00K
LELAND WINNEBAGO CO. IA 06/07/2008 16:35 CST-6 Flash Flood 0 0 20.00K 0.00K
(MCW)MASON CITY MUNI CERRO GORDO CO. IA 06/07/2008 16:42 CST-6 Tornado EF0 0 0 5.00K 0.00K
FREEMAN CERRO GORDO CO. IA 06/07/2008 16:53 CST-6 Funnel Cloud 0 0 0.00K 0.00K
BLANDEN POCAHONTAS CO. IA 06/07/2008 17:17 CST-6 Funnel Cloud 0 0 0.00K 0.00K
KNOKE CALHOUN CO. IA 06/07/2008 17:28 CST-6 Funnel Cloud 0 0 0.00K 0.00K
POMEROY CALHOUN CO. IA 06/07/2008 17:28 CST-6 Funnel Cloud 0 0 0.00K 0.00K
SCHLESWIG CRAWFORD CO. IA 06/07/2008 17:50 CST-6 Heavy Rain 0 0 0.00K 0.00K
BARNUM WEBSTER CO. IA 06/07/2008 18:08 CST-6 Thunderstorm Wind 61 kts. EG 0 0 1.00K 0.00K
TARA WEBSTER CO. IA 06/07/2008 18:13 CST-6 Thunderstorm Wind 65 kts. EG 0 0 50.00K 0.00K
TARA WEBSTER CO. IA 06/07/2008 18:16 CST-6 Thunderstorm Wind 52 kts. EG 0 0 5.00K 0.00K
GOODELL HANCOCK CO. IA 06/07/2008 18:20 CST-6 Thunderstorm Wind 52 kts. EG 0 0 3.00K 0.00K
MANLY WORTH CO. IA 06/07/2008 18:20 CST-6 Flash Flood 0 0 100.00K 0.00K
(FOD)FT DODGE MUNI A WEBSTER CO. IA 06/07/2008 18:22 CST-6 Heavy Rain 0 0 0.00K 0.00K
SCHLESWIG CRAWFORD CO. IA 06/07/2008 18:27 CST-6 Hail 1.00 in. 0 0 3.00K 5.00K
FT DODGE WEBSTER CO. IA 06/07/2008 18:52 CST-6 Hail 0.88 in. 0 0 3.00K 5.00K
FT DODGE WEBSTER CO. IA 06/07/2008 18:53 CST-6 Flash Flood 0 0 100.00K 0.00K
CLAY WORKS WEBSTER CO. IA 06/07/2008 18:57 CST-6 Flash Flood 0 0 25.00K 0.00K
CHARTER OAK CRAWFORD CO. IA 06/07/2008 19:00 CST-6 Flash Flood 0 0 20.00K 0.00K
SCHLESWIG CRAWFORD CO. IA 06/07/2008 19:08 CST-6 Flash Flood 0 0 25.00K 0.00K
FREEMAN CERRO GORDO CO. IA 06/07/2008 19:17 CST-6 Flash Flood 0 0 200.00K 0.00K
FT DODGE WEBSTER CO. IA 06/07/2008 19:19 CST-6 Flash Flood 0 0 100.00K 0.00K
LAKE VIEW SAC CO. IA 06/07/2008 19:23 CST-6 Flash Flood 0 0 20.00K 0.00K
LOHRVILLE CALHOUN CO. IA 06/07/2008 19:29 CST-6 Thunderstorm Wind 52 kts. EG 0 0 3.00K 0.00K
MANLY WORTH CO. IA 06/07/2008 19:30 CST-6 Flash Flood 0 0 50.00K 0.00K
FT DODGE WEBSTER CO. IA 06/07/2008 20:05 CST-6 Flash Flood 0 0 50.00K 0.00K
KIRON CRAWFORD CO. IA 06/07/2008 20:10 CST-6 Flash Flood 0 0 10.00K 0.00K
IOWA FALLS HARDIN CO. IA 06/07/2008 20:51 CST-6 Heavy Rain 0 0 50.00K 0.00K
GILBERTVILLE BLACK HAWK CO. IA 06/07/2008 21:05 CST-6 Thunderstorm Wind 52 kts. EG 0 0 5.00K 0.00K
EVANSDALE BLACK HAWK CO. IA 06/07/2008 21:13 CST-6 Thunderstorm Wind 53 kts. MG 0 0 15.00K 0.00K
WAVERLY BREMER CO. IA 06/07/2008 21:15 CST-6 Flash Flood 0 0 10.00K 0.00K
DOW CITY CRAWFORD CO. IA 06/07/2008 21:33 CST-6 Flash Flood 0 0 25.00K 0.00K
BRADFORD FRANKLIN CO. IA 06/07/2008 21:52 CST-6 Flash Flood 0 0 10.00K 0.00K
CEDAR FALLS BLACK HAWK CO. IA 06/07/2008 22:06 CST-6 Thunderstorm Wind 52 kts. EG 0 0 20.00K 0.00K
CEDAR FALLS BLACK HAWK CO. IA 06/07/2008 22:06 CST-6 Flash Flood 0 0 25.00K 0.00K
DUMONT BUTLER CO. IA 06/07/2008 22:11 CST-6 Flash Flood 0 0 10.00K 0.00K
JANESVILLE BREMER CO. IA 06/07/2008 22:17 CST-6 Thunderstorm Wind 65 kts. EG 0 0 50.00K 0.00K
WATERLOO BLACK HAWK CO. IA 06/07/2008 22:18 CST-6 Thunderstorm Wind 53 kts. MG 0 0 5.00K 0.00K
CEDAR FALLS ISLEY AR BLACK HAWK CO. IA 06/07/2008 22:19 CST-6 Thunderstorm Wind 52 kts. EG 0 0 20.00K 0.00K
WATERLOO BLACK HAWK CO. IA 06/07/2008 22:25 CST-6 Thunderstorm Wind 63 kts. MG 0 0 10.00K 0.00K
DUNKERTON BLACK HAWK CO. IA 06/07/2008 22:27 CST-6 Thunderstorm Wind 61 kts. EG 0 0 5.00K 0.00K
DUNKERTON BLACK HAWK CO. IA 06/07/2008 22:29 CST-6 Thunderstorm Wind 58 kts. MG 0 0 5.00K 0.00K
KAMRAR HAMILTON CO. IA 06/07/2008 22:30 CST-6 Flash Flood 1 0 50.00K 0.00K
IOWA FALLS HARDIN CO. IA 06/07/2008 23:00 CST-6 Heavy Rain 0 0 0.00K 0.00K
LIDDERDALE CARROLL CO. IA 06/07/2008 23:00 CST-6 Flash Flood 0 0 25.00K 0.00K
WATERLOO BLACK HAWK CO. IA 06/07/2008 23:05 CST-6 Flash Flood 0 0 20.00K 0.00K
IOWA FALLS HARDIN CO. IA 06/07/2008 23:24 CST-6 Heavy Rain 0 0 0.00K 0.00K
IOWA FALLS HARDIN CO. IA 06/08/2008 00:00 CST-6 Heavy Rain 0 0 25.00K 0.00K
IOWA FALLS HARDIN CO. IA 06/08/2008 00:08 CST-6 Heavy Rain 0 0 0.00K 0.00K
IOWA FALLS HARDIN CO. IA 06/08/2008 00:25 CST-6 Flash Flood 0 0 20.00K 0.00K
IOWA FALLS HARDIN CO. IA 06/08/2008 00:26 CST-6 Flash Flood 0 0 25.00K 0.00K
ROBERTS WEBSTER CO. IA 06/08/2008 00:30 CST-6 Flash Flood 0 0 10.00K 0.00K
ALLISON BUTLER CO. IA 06/08/2008 00:39 CST-6 Hail 1.75 in. 0 0 10.00K 5.00K
CLARKSVILLE BUTLER CO. IA 06/08/2008 00:43 CST-6 Hail 1.75 in. 0 0 5.00K 5.00K
ALLISON BUTLER CO. IA 06/08/2008 00:49 CST-6 Hail 1.75 in. 0 0 10.00K 5.00K
WAVERLY BREMER CO. IA 06/08/2008 01:26 CST-6 Flash Flood 0 0 10.00K 0.00K
SCHALLER SAC CO. IA 06/08/2008 01:34 CST-6 Flash Flood 0 0 10.00K 0.00K
SAC CITY SAC CO. IA 06/08/2008 01:42 CST-6 Flash Flood 0 0 10.00K 0.00K
EARLY SAC CO. IA 06/08/2008 01:56 CST-6 Flash Flood 0 0 10.00K 0.00K
DENISON CRAWFORD CO. IA 06/08/2008 03:05 CST-6 Flash Flood 0 0 10.00K 0.00K
LYTTON SAC CO. IA 06/08/2008 03:14 CST-6 Flash Flood 0 0 10.00K 0.00K
MASON CITY CERRO GORDO CO. IA 06/08/2008 03:18 CST-6 Flash Flood 0 0 200.00K 0.00K
CLARION ARPT WRIGHT CO. IA 06/08/2008 03:26 CST-6 Flash Flood 0 0 20.00K 0.00K
EAGLE GROVE ARPT WRIGHT CO. IA 06/08/2008 03:26 CST-6 Flash Flood 1 0 25.00K 0.00K
CARROLL CARROLL CO. IA 06/08/2008 06:00 CST-6 Flood 0 0 25.00K 0.00K
DALLAS MINE DALLAS CO. IA 06/08/2008 06:30 CST-6 Flash Flood 0 0 10.00K 0.00K
WEBSTER CITY HAMILTON CO. IA 06/08/2008 07:00 CST-6 Flood 0 0 50.00K 0.00K
ADEL DALLAS CO. IA 06/08/2008 07:10 CST-6 Flash Flood 0 0 10.00K 0.00K
DALLAS CENTER DALLAS CO. IA 06/08/2008 07:10 CST-6 Heavy Rain 0 0 0.00K 0.00K
SHULER MINE DALLAS CO. IA 06/08/2008 07:10 CST-6 Flash Flood 0 0 10.00K 0.00K
COLFAX JASPER CO. IA 06/08/2008 07:25 CST-6 Flash Flood 0 0 10.00K 0.00K
MASON CITY CERRO GORDO CO. IA 06/08/2008 07:25 CST-6 Flash Flood 0 0 50.00K 0.00K
MASON CITY CERRO GORDO CO. IA 06/08/2008 08:30 CST-6 Flash Flood 0 0 500.00K 0.00K
ENTERPRISE POLK CO. IA 06/08/2008 10:25 CST-6 Flood 0 0 2.00K 0.00K
RISINGSUN POLK CO. IA 06/08/2008 10:44 CST-6 Flood 0 0 1.00K 0.00K
LU VERNE KOSSUTH CO. IA 06/08/2008 12:00 CST-6 Flash Flood 0 0 20.00K 0.00K
GRISWOLD CASS CO. IA 06/08/2008 13:28 CST-6 Flash Flood 0 0 10.00K 0.00K
CASEY GUTHRIE CO. IA 06/08/2008 13:35 CST-6 Flood 0 0 25.00K 0.00K
ALGONA MUNI ARPT KOSSUTH CO. IA 06/08/2008 14:26 CST-6 Flash Flood 0 0 10.00K 0.00K
APLINGTON BUTLER CO. IA 06/08/2008 14:28 CST-6 Flood 0 0 100.00K 0.00K
GRAVITY TAYLOR CO. IA 06/08/2008 14:35 CST-6 Tornado EF0 0 0 50.00K 5.00K
STRINGTOWN ADAMS CO. IA 06/08/2008 14:42 CST-6 Thunderstorm Wind 57 kts. EG 0 0 5.00K 0.00K
GREENE BUTLER CO. IA 06/08/2008 15:05 CST-6 Flood 0 0 50.00K 0.00K
PICKERING MARSHALL CO. IA 06/08/2008 15:10 CST-6 Tornado EF1 0 0 30.00K 2.00K
PANTHER DALLAS CO. IA 06/08/2008 15:11 CST-6 Flood 0 0 500.00K 0.00K
PANTHER DALLAS CO. IA 06/08/2008 15:11 CST-6 Flood 0 0 500.00K 0.00K
PITZER MADISON CO. IA 06/08/2008 15:11 CST-6 Flood 0 0 250.00K 0.00K
ANITA MUNI ARPT CASS CO. IA 06/08/2008 15:13 CST-6 Flash Flood 0 0 10.00K 0.00K
LORIMOR UNION CO. IA 06/08/2008 15:25 CST-6 Thunderstorm Wind 52 kts. EG 0 0 0.00K 0.00K
TOLEDO TAMA CO. IA 06/08/2008 15:32 CST-6 Hail 1.00 in. 0 0 2.00K 5.00K
JAMISON CLARKE CO. IA 06/08/2008 15:38 CST-6 Funnel Cloud 0 0 0.00K 0.00K
KENSETT WORTH CO. IA 06/08/2008 15:45 CST-6 Flash Flood 0 0 10.00K 0.00K
TAMA ARPT TAMA CO. IA 06/08/2008 15:50 CST-6 Flash Flood 0 0 10.00K 0.00K
HARTFORD WARREN CO. IA 06/08/2008 16:04 CST-6 Thunderstorm Wind 61 kts. EG 0 0 5.00K 0.00K
PLEASANTVILLE MARION CO. IA 06/08/2008 16:05 CST-6 Thunderstorm Wind 50 kts. EG 0 0 2.00K 0.00K
SWAN MARION CO. IA 06/08/2008 16:05 CST-6 Thunderstorm Wind 57 kts. EG 0 0 5.00K 0.00K
LORIMOR UNION CO. IA 06/08/2008 16:25 CST-6 Flash Flood 0 0 50.00K 0.00K
KENNEDY DALLAS CO. IA 06/08/2008 16:30 CST-6 Flash Flood 0 0 10.00K 0.00K
OTLEY MARION CO. IA 06/08/2008 16:32 CST-6 Thunderstorm Wind 52 kts. EG 0 0 5.00K 0.00K
PELLA MARION CO. IA 06/08/2008 16:38 CST-6 Flash Flood 0 0 10.00K 0.00K
MONTEZUMA POWESHIEK CO. IA 06/08/2008 16:43 CST-6 Thunderstorm Wind 56 kts. EG 0 0 3.00K 0.00K
GUERNSEY POWESHIEK CO. IA 06/08/2008 16:52 CST-6 Thunderstorm Wind 52 kts. MG 0 0 3.00K 0.00K
WOODBURN CLARKE CO. IA 06/08/2008 16:52 CST-6 Flash Flood 0 0 10.00K 0.00K
DUMONT BUTLER CO. IA 06/08/2008 17:10 CST-6 Flash Flood 0 0 10.00K 0.00K
MARSHALLTOWN MARSHALL CO. IA 06/08/2008 18:00 CST-6 Flash Flood 0 0 50.00K 0.00K
EXLINE APPANOOSE CO. IA 06/08/2008 18:05 CST-6 Thunderstorm Wind 52 kts. EG 0 0 5.00K 0.00K
OTTUMWA WAPELLO CO. IA 06/08/2008 18:24 CST-6 Thunderstorm Wind 55 kts. EG 0 0 10.00K 0.00K
(OTM)OTTUMWA INDSTRL WAPELLO CO. IA 06/08/2008 18:25 CST-6 Thunderstorm Wind 55 kts. MG 0 0 1.00K 0.00K
BELKNAP DAVIS CO. IA 06/08/2008 18:25 CST-6 Thunderstorm Wind 50 kts. EG 0 0 2.00K 0.00K
OTTUMWA WAPELLO CO. IA 06/08/2008 18:27 CST-6 Thunderstorm Wind 61 kts. EG 0 0 10.00K 0.00K
HIGHLAND CENTER WAPELLO CO. IA 06/08/2008 18:30 CST-6 Tornado EF1 0 0 75.00K 5.00K
OTTUMWA WAPELLO CO. IA 06/08/2008 18:35 CST-6 Thunderstorm Wind 50 kts. EG 0 0 3.00K 0.00K
Totals: 2 0 4.403M 93.00K