Storm Events Database

Event Details

Event Thunderstorm Wind
Magnitude 65 kts.
State IOWA
County/Area GRUNDY
WFO DMX
Begin Date 06/06/2008 00:30:00 CST-6
Begin Range 1
Begin Azimuth S
Begin Location DIKE
Begin Lat/Lon 42.46/-92.63
End Date 06/06/2008 00:30:00 CST-6
Deaths Direct/Indirect 0/0 (fatality details below, when available...)
Injuries Direct/Indirect 0/0
Property Damage 100.00K
Crop Damage 0.00K
Episode Narrative A very dynamic weather situation unfolded during the 5th into the 6th. Although the atmosphere was summer like in the lower elevations, the upper levels were more typical of April. A strong upper level low pressure area lifted northeast out of the southern Rockies with a negatively tilted trough of low pressure lifting northeast across the central U.S. An intense low pressure area developed over northern Kansas and lifted north into southeast North Dakota by the morning of the 6th, with a central Pressure of 984 mb. During the day on the 5th, the atmosphere was capped with the freezing level rising to 15,600 feet by the evening hours over central Iowa. A warm front lifted north across Iowa, with temperatures warming into the mid 80s to the south of the front with dewpoint readings in the low 70s. It became quite unstable by evening with MUCAPE between 2500 and 3000 J/kg and lifted indices in the -5 to -9 C. range. Considerable shear was available with the effective shear between 40 and 65 kts by evening. Downdraft CAPE was between 800 and 1400 J/kg across the CWA, with 400 to 500 J/kg of CAPE available in the -10 to -30 C. layer of the atmosphere. The airmass became very moist by evening with 1.6 to 1.9 inches of precipitable water available by evening. The LCL fall to between 750 and 1250 meters. Thunderstorms erupted to the southwest of Iowa in central Kansas, along the dry line there. The storms raced northeast into Iowa by sunset. In spite of the dynamics that were in place, the amount of severe weather was relatively limited. Hail was limited by the high freezing level and lack of supercellular development. Several of the storms produced small hail and a few produced high winds. There were several reports of brief tornado touchdowns, but little in the way of damage was reported for the most part. The first tornado touched down in Cass County and was only on the ground briefly. Another tornado touched down in Union County. The tornado took the roof off of an outbuilding and knocked down some power lines. The strongest tornado was on the ground for over 18 miles in Warren and Marion Counties. The tornado track was over open country for the most part and damaged outbuildings and one house. Three other tornadoes touched down in Jasper County, causing some moderate damage. The most significant feature with this event was the flash flooding. Soil conditions across the state were very saturated. Any significant rainfall resulted in flash flooding. A narrow band of heavier rainfall stretched from south central into central Iowa. Flash flooding occurred in the Des Moines metro area as the airport recorded 4.15 inches of rainfall for the day, with about 3 inches falling in two hours. Reports of severe street flooding were received with numerous reports of manhole covers being blown off. During the event, high winds occurred over the far northwest part of the CWA as the surface low intensified rapidly and the gradient tightened. A window was blown out in Pocahontas County, with tree and power line damage done in Emmet County. A barn was also damaged near Gruver in Emmet County by the high wind.
Event Narrative Damage was done to a mobile home park. A shed was destroyed. Mobile home was moved off its foundation with siding blown off homes.


All events for this episode:

Location County/Zone St. Date Time T.Z. Type Mag Dth Inj PrD CrD
Totals: 0 2 1.173M 37.00K
CUMBERLAND CASS CO. IA 06/05/2008 19:12 CST-6 Tornado EF0 0 0 0.00K 0.00K
ANITA MUNI ARPT CASS CO. IA 06/05/2008 19:23 CST-6 Thunderstorm Wind 52 kts. EG 0 0 1.00K 0.00K
SUMMERSET WARREN CO. IA 06/05/2008 19:23 CST-6 Flood 0 0 25.00K 5.00K
POCAHONTAS (ZONE) POCAHONTAS (ZONE) IA 06/05/2008 19:58 CST-6 High Wind 61 kts. EG 0 0 5.00K 0.00K
POCAHONTAS (ZONE) POCAHONTAS (ZONE) IA 06/05/2008 19:58 CST-6 High Wind 57 kts. EG 0 0 3.00K 0.00K
CRESTON UNION CO. IA 06/05/2008 20:24 CST-6 Tornado EF1 0 0 25.00K 2.00K
EMMET (ZONE) EMMET (ZONE) IA 06/05/2008 21:07 CST-6 High Wind 52 kts. EG 0 0 5.00K 0.00K
LORIMOR UNION CO. IA 06/05/2008 21:10 CST-6 Hail 0.88 in. 0 0 1.00K 5.00K
WINDSOR HGTS POLK CO. IA 06/05/2008 21:25 CST-6 Funnel Cloud 0 0 0.00K 0.00K
SLATER STORY CO. IA 06/05/2008 21:34 CST-6 Hail 0.88 in. 0 0 1.00K 5.00K
AMES STORY CO. IA 06/05/2008 21:49 CST-6 Hail 0.88 in. 0 0 2.00K 5.00K
DES MOINES POLK CO. IA 06/05/2008 21:55 CST-6 Heavy Rain 0 0 0.00K 0.00K
EAST PERU MADISON CO. IA 06/05/2008 21:56 CST-6 Flash Flood 0 0 5.00K 0.00K
CUMMING WARREN CO. IA 06/05/2008 22:16 CST-6 Flash Flood 0 0 10.00K 0.00K
SUMMERSET WARREN CO. IA 06/05/2008 22:22 CST-6 Flash Flood 0 0 10.00K 0.00K
DECATUR CITY DECATUR CO. IA 06/05/2008 22:30 CST-6 Thunderstorm Wind 61 kts. EG 0 0 10.00K 0.00K
VAN WERT DECATUR CO. IA 06/05/2008 22:40 CST-6 Thunderstorm Wind 57 kts. EG 0 0 5.00K 0.00K
PROLE WARREN CO. IA 06/05/2008 22:45 CST-6 Flood 0 0 25.00K 0.00K
VAN WERT DECATUR CO. IA 06/05/2008 22:45 CST-6 Thunderstorm Wind 57 kts. EG 0 0 5.00K 0.00K
NORWALK WARREN CO. IA 06/05/2008 22:45 CST-6 Flash Flood 0 0 5.00K 0.00K
(DSM)DES MOINES INTL POLK CO. IA 06/05/2008 22:45 CST-6 Flash Flood 0 0 2.00K 0.00K
(DSM)DES MOINES INTL POLK CO. IA 06/05/2008 22:45 CST-6 Flash Flood 0 0 50.00K 0.00K
LESLIE CLARKE CO. IA 06/05/2008 22:49 CST-6 Thunderstorm Wind 61 kts. EG 0 0 35.00K 0.00K
LESLIE CLARKE CO. IA 06/05/2008 22:49 CST-6 Tornado EF1 0 0 0.00K 0.00K
GUSS TAYLOR CO. IA 06/05/2008 22:50 CST-6 Flash Flood 0 0 5.00K 0.00K
GUSS TAYLOR CO. IA 06/05/2008 22:50 CST-6 Flash Flood 0 0 10.00K 0.00K
LEON DECATUR CO. IA 06/05/2008 22:50 CST-6 Thunderstorm Wind 57 kts. EG 0 0 5.00K 0.00K
OSCEOLA MUNI ARPT CLARKE CO. IA 06/05/2008 22:54 CST-6 Thunderstorm Wind 61 kts. EG 0 0 5.00K 0.00K
LEON DECATUR CO. IA 06/05/2008 23:00 CST-6 Flash Flood 0 0 10.00K 0.00K
LIBERTY CENTER WARREN CO. IA 06/05/2008 23:10 CST-6 Tornado EF1 0 0 150.00K 10.00K
LIBERTY CENTER WARREN CO. IA 06/05/2008 23:13 CST-6 Thunderstorm Wind 52 kts. EG 0 0 5.00K 0.00K
SANDYVILLE WARREN CO. IA 06/05/2008 23:20 CST-6 Thunderstorm Wind 61 kts. EG 0 0 25.00K 0.00K
SWAN MARION CO. IA 06/05/2008 23:25 CST-6 Tornado EF1 0 0 30.00K 0.00K
KNOXVILLE ARPT MARION CO. IA 06/05/2008 23:27 CST-6 Thunderstorm Wind 52 kts. EG 0 0 5.00K 0.00K
PRAIRIE CITY JASPER CO. IA 06/05/2008 23:36 CST-6 Tornado EF1 0 0 75.00K 0.00K
BAXTER JASPER CO. IA 06/05/2008 23:44 CST-6 Thunderstorm Wind 50 kts. MG 0 0 0.00K 0.00K
REASNOR JASPER CO. IA 06/05/2008 23:45 CST-6 Tornado EF1 0 2 250.00K 5.00K
NEWTON JASPER CO. IA 06/05/2008 23:49 CST-6 Tornado EF0 0 0 25.00K 0.00K
PELLA MARION CO. IA 06/05/2008 23:52 CST-6 Thunderstorm Wind 50 kts. MG 0 0 1.00K 0.00K
GILMAN MARSHALL CO. IA 06/06/2008 00:05 CST-6 Thunderstorm Wind 61 kts. EG 0 0 15.00K 0.00K
DES MOINES POLK CO. IA 06/06/2008 00:08 CST-6 Flash Flood 0 0 5.00K 0.00K
DES MOINES POLK CO. IA 06/06/2008 00:08 CST-6 Flash Flood 0 0 5.00K 0.00K
PATTERSON MADISON CO. IA 06/06/2008 00:10 CST-6 Flash Flood 0 0 5.00K 0.00K
DES MOINES POLK CO. IA 06/06/2008 00:10 CST-6 Flash Flood 0 0 10.00K 0.00K
WELLSBURG GRUNDY CO. IA 06/06/2008 00:13 CST-6 Thunderstorm Wind 61 kts. EG 0 0 5.00K 0.00K
URBANDALE POLK CO. IA 06/06/2008 00:29 CST-6 Flash Flood 0 0 25.00K 0.00K
NEW HARTFORD BUTLER CO. IA 06/06/2008 00:30 CST-6 Thunderstorm Wind 52 kts. EG 0 0 5.00K 0.00K
DIKE GRUNDY CO. IA 06/06/2008 00:30 CST-6 Thunderstorm Wind 65 kts. EG 0 0 100.00K 0.00K
TAMA TAMA CO. IA 06/06/2008 00:39 CST-6 Thunderstorm Wind 55 kts. MG 0 0 1.00K 0.00K
CEDAR FALLS BLACK HAWK CO. IA 06/06/2008 00:41 CST-6 Thunderstorm Wind 57 kts. EG 0 0 10.00K 0.00K
PATTERSON MADISON CO. IA 06/06/2008 00:41 CST-6 Flash Flood 0 0 5.00K 0.00K
STORY CITY STORY CO. IA 06/06/2008 00:42 CST-6 Flash Flood 0 0 1.00K 0.00K
WATERLOO BLACK HAWK CO. IA 06/06/2008 00:45 CST-6 Thunderstorm Wind 57 kts. EG 0 0 30.00K 0.00K
TRIPOLI BREMER CO. IA 06/06/2008 00:55 CST-6 Thunderstorm Wind 51 kts. MG 0 0 0.00K 0.00K
CAMBRIDGE STORY CO. IA 06/06/2008 01:54 CST-6 Flash Flood 0 0 50.00K 0.00K
CAMBRIDGE STORY CO. IA 06/06/2008 02:30 CST-6 Flash Flood 0 0 50.00K 0.00K
NEVADA STORY CO. IA 06/06/2008 08:10 CST-6 Flood 0 0 20.00K 0.00K
Totals: 0 2 1.173M 37.00K