Storm Events Database

Event Details

Event Hail
Magnitude 0.75 in.
State IOWA
County/Area GRUNDY
WFO DMX
Report Source Trained Spotter
NCDC Data Source CSV
Begin Date 2008-06-14 13:23:00.0 CST-6
Begin Location 1S BEAMAN
Begin Lat/Lon 42.22/-92.82
End Date 2008-06-14 13:23:00.0 CST-6
Deaths Direct/Indirect 0/0 (fatality details below, when available...)
Injuries Direct/Indirect 0/0
Property Damage 0.00K
Crop Damage 5.00K
Episode Narrative A weak trough of low pressure swept southeast across Iowa during the day on the 14th. The airmass became unstable with lifted indices falling to the -5 to -7 C. range. About 1000 J/kg of uncapped cape was available by mid day with about 35 kts of effective shear. Moisture pooled along the trough as a 35 kt wind in the low levels pooled 11 C. dewpoints at the 850 mb level. The airmass was relatively cool with a freezing level of only 10,000 feet. As such, hail was the primary mode of severe weather with this event. Even with 300 J/kg of CAPE in the -10 to -30 C. layer of the atmosphere, the limited overall CAPE kept hail size to an inch or less. The storms in Marshall, Hardin, and Tama Counties were prolific hail producers and stripped leaves from the trees. In the Garwin area, quarter size hail completely covered the ground. A few storms produced high winds of 60 MPH or higher. Available downdraft CAPE was between 1000 and 1200 J/kg. Severe thunderstorms fired along the trough from central into northeast Iowa. They moved rather quickly, around 40 MPH, and exited the area by late afternoon.
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 54.00K 125.00K
HUBBARD HARDIN CO. IA 06/14/2008 12:45 CST-6 Thunderstorm Wind 52 kts. EG 0 0 2.00K 0.00K
HUBBARD HARDIN CO. IA 06/14/2008 12:45 CST-6 Hail 0.75 in. 0 0 0.00K 0.00K
NEW PROVIDENCE HARDIN CO. IA 06/14/2008 12:45 CST-6 Hail 0.88 in. 0 0 1.00K 5.00K
ELDORA MUNI ARPT HARDIN CO. IA 06/14/2008 12:48 CST-6 Hail 0.75 in. 0 0 0.00K 0.00K
UNION HARDIN CO. IA 06/14/2008 13:03 CST-6 Hail 0.88 in. 0 0 1.00K 5.00K
CONRAD GRUNDY CO. IA 06/14/2008 13:16 CST-6 Hail 1.00 in. 0 0 3.00K 5.00K
BEAMAN GRUNDY CO. IA 06/14/2008 13:23 CST-6 Hail 0.75 in. 0 0 0.00K 5.00K
MARSHALLTOWN ARPT MARSHALL CO. IA 06/14/2008 13:25 CST-6 Hail 0.75 in. 0 0 0.00K 5.00K
MARSHALLTOWN ARPT MARSHALL CO. IA 06/14/2008 13:30 CST-6 Thunderstorm Wind 51 kts. MG 0 0 0.00K 0.00K
MARSHALLTOWN MARSHALL CO. IA 06/14/2008 13:31 CST-6 Thunderstorm Wind 51 kts. MG 0 0 0.00K 0.00K
HUDSON BLACK HAWK CO. IA 06/14/2008 13:37 CST-6 Hail 1.00 in. 0 0 3.00K 5.00K
GREEN MTN MARSHALL CO. IA 06/14/2008 13:38 CST-6 Hail 0.88 in. 0 0 1.00K 5.00K
GARWIN TAMA CO. IA 06/14/2008 13:40 CST-6 Hail 1.00 in. 0 0 5.00K 10.00K
WATERLOO BLACK HAWK CO. IA 06/14/2008 13:45 CST-6 Hail 1.00 in. 0 0 5.00K 5.00K
WATERLOO BLACK HAWK CO. IA 06/14/2008 13:47 CST-6 Hail 1.00 in. 0 0 5.00K 5.00K
WATERLOO RANCH ARPT BLACK HAWK CO. IA 06/14/2008 13:50 CST-6 Hail 1.00 in. 0 0 5.00K 0.00K
GARWIN TAMA CO. IA 06/14/2008 13:51 CST-6 Hail 1.00 in. 0 0 3.00K 5.00K
TOLEDO TAMA CO. IA 06/14/2008 14:00 CST-6 Thunderstorm Wind 57 kts. EG 0 0 5.00K 0.00K
TOLEDO TAMA CO. IA 06/14/2008 14:00 CST-6 Hail 1.00 in. 0 0 10.00K 5.00K
DUNKERTON DAVIS ARPT BLACK HAWK CO. IA 06/14/2008 14:05 CST-6 Hail 0.88 in. 0 0 1.00K 50.00K
VINING TAMA CO. IA 06/14/2008 14:16 CST-6 Hail 0.88 in. 0 0 1.00K 5.00K
WASHBURN BLACK HAWK CO. IA 06/14/2008 14:34 CST-6 Hail 0.88 in. 0 0 3.00K 5.00K
Totals: 0 0 54.00K 125.00K