Storm Events Database

Event Details

Event Hail
Magnitude 0.88 in.
State IOWA
County/Area GRUNDY
WFO DMX
Report Source Trained Spotter
NCDC Data Source CSV
Begin Date 2008-06-15 02:22:00.0 CST-6
Begin Location 1SE CONRAD
Begin Lat/Lon 42.22/-92.87
End Date 2008-06-15 02:22:00.0 CST-6
Deaths Direct/Indirect 0/0 (fatality details below, when available...)
Injuries Direct/Indirect 0/0
Property Damage 1.00K
Crop Damage 5.00K
Episode Narrative Strong warm air advection took place over Iowa during the overnight hours of the 14th into the morning of the 15th. A low level jet of about 30 kts set up during the late night hours. Being it was during the night, much of the convection was elevated, however the lifted index fell to the zero to -3 C. range with about 1000 J/kg of CAPE. Downdraft CAPE war around 1100 J/kg as the airmass was not saturated. CAPE in the -10 to -30 C. layer was only 200 J/kg, so in spite of the low freezing level, 10,000 to 10,500 feet, hail was not a major player. The high winds were the primary mode of severe weather. The LCL height was quite high, around 2000 meters. In spite of that, a tornado touched down briefly in Humboldt County, causing minor damage. Funnel clouds were reported in Wright County, however no touchdowns occurred. Two clusters of storms developed and moved east across northern Iowa. The two actually followed nearly the same track, giving two rounds of thunderstorms to nearly the same areas. Numerous reports of high winds were received, many in the 60 to 65 MPH range. One report from Steamboat Rock, in Hardin County, by an RWIS site.
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 0 174.00K 16.00K
RUTHVEN PALO ALTO CO. IA 06/14/2008 23:48 CST-6 Hail 0.88 in. 0 0 1.00K 5.00K
THOR HUMBOLDT CO. IA 06/15/2008 00:49 CST-6 Tornado EF0 0 0 10.00K 1.00K
GOLDFIELD WRIGHT CO. IA 06/15/2008 01:00 CST-6 Thunderstorm Wind 57 kts. EG 0 0 15.00K 0.00K
VINCENT WEBSTER CO. IA 06/15/2008 01:02 CST-6 Thunderstorm Wind 50 kts. EG 0 0 2.00K 0.00K
EAGLE GROVE WRIGHT CO. IA 06/15/2008 01:05 CST-6 Thunderstorm Wind 57 kts. EG 0 0 15.00K 0.00K
CLARION WRIGHT CO. IA 06/15/2008 01:15 CST-6 Thunderstorm Wind 50 kts. MG 0 0 0.00K 0.00K
LIVERMORE HUMBOLDT CO. IA 06/15/2008 01:18 CST-6 Hail 1.00 in. 0 0 3.00K 5.00K
WILLIAMS HAMILTON CO. IA 06/15/2008 01:30 CST-6 Thunderstorm Wind 61 kts. EG 0 0 30.00K 0.00K
ALDEN HARDIN CO. IA 06/15/2008 01:35 CST-6 Thunderstorm Wind 61 kts. EG 0 0 20.00K 0.00K
IOWA FALLS HARDIN CO. IA 06/15/2008 01:38 CST-6 Thunderstorm Wind 52 kts. EG 0 0 5.00K 0.00K
IOWA FALLS HARDIN CO. IA 06/15/2008 01:40 CST-6 Thunderstorm Wind 50 kts. EG 0 0 5.00K 0.00K
IOWA FALLS HARDIN CO. IA 06/15/2008 01:40 CST-6 Thunderstorm Wind 52 kts. EG 0 0 10.00K 0.00K
STEAMBOAT ROCK HARDIN CO. IA 06/15/2008 01:57 CST-6 Thunderstorm Wind 65 kts. MG 0 0 0.00K 0.00K
GRUNDY CENTER GRUNDY CO. IA 06/15/2008 02:10 CST-6 Thunderstorm Wind 52 kts. EG 0 0 10.00K 0.00K
CONRAD GRUNDY CO. IA 06/15/2008 02:22 CST-6 Hail 0.88 in. 0 0 1.00K 5.00K
CONRAD GRUNDY CO. IA 06/15/2008 02:22 CST-6 Thunderstorm Wind 53 kts. EG 0 0 10.00K 0.00K
GLADBROOK TAMA CO. IA 06/15/2008 02:30 CST-6 Thunderstorm Wind 50 kts. EG 0 0 2.00K 0.00K
WATERLOO BLACK HAWK CO. IA 06/15/2008 02:40 CST-6 Thunderstorm Wind 57 kts. EG 0 0 25.00K 0.00K
WASHBURN BLACK HAWK CO. IA 06/15/2008 02:45 CST-6 Thunderstorm Wind 56 kts. EG 0 0 10.00K 0.00K
Totals: 0 0 174.00K 16.00K