Storm Events Database

Event Details

Event Funnel Cloud
State IOWA
County/Area GRUNDY
WFO DMX
Report Source Trained Spotter
NCDC Data Source CSV
Begin Date 2008-06-25 19:07:00.0 CST-6
Begin Location 1NW WELLSBURG
Begin Lat/Lon 42.44/-92.93
End Date 2008-06-25 19:07:00.0 CST-6
Deaths Direct/Indirect 0/0 (fatality details below, when available...)
Injuries Direct/Indirect 0/0
Property Damage 0.00K
Crop Damage 0.00K
Episode Narrative A warm frontal boundary lifted north across Iowa during the day on the 25th and was located over northern Iowa by the evening hours. The airmass became very unstable to the south of the front as surface temperatures warmed into the 85 to 90 degree range, and dewpoints rose into the low to mid 70s. This produced CAPE in the 4500 to 5000 J/kg range and a lifted index of -10 to -15 C. The atmosphere was weakly sheared with 20 to 25 kts of bulk shear. The freezing level was relatively low, around to just over 13,000 feet. A small area of thunderstorms formed over northwest and north central Iowa by the late afternoon and early evening hours. The storms became more widespread and formed into an MCS, which propagated southeast across the state and became severe. The storms produced hail, high winds, and some flash flooding. The primary mode of severe weather with this MCS was hail. Reports of hail were widespread. Much of the hail was in the three-quarter to one and one quarter inch range. There were, however, several reports of large hail. Three inch diameter hail fell northeast of Madrid in Boone County, with another report of two and one half inch diameter hail about 3 miles southwest of that. Later on, another two and one half inch hail report was received in Story County. Much of the larger hail occurred during the early stages of the event with golf ball size hail reported in Story, Dallas, and Marshall Counties as well. During the late evening hours, golf ball size hail also fell in Polk and Warren Counties as a small area of stronger storms developed within the MCS. The storms produced gusty winds in most areas as they passed, however much of the wind was below severe levels. Winds gusted to 60 to 70 MPH during the later part of the severe event in Dallas, Polk and Warren Counties as a beta bow element dropped south across these counties. Rainfall was very heavy with the storms and did cause some flash flooding. Water was reported over Highway 17 near the Des Moines River in Dallas County, caused by flash flooding. Fortunately, the weather had been relatively dry for the previous 2 weeks, so antecedent soil conditions were relatively dry. Five inches of rain fell west of Polk City in Polk County in a 2 to 3 hour time frame. There were several reports of rainfall in the 2 to 3 inch range in under three hours. Although the system was not a tornadic system, there was one report of a funnel cloud in Grundy County. Lightning struck a house in Polk County. The house was damaged by the lightning wand it was started on fire.
Event Narrative A trained spotter reported strong rotation and a developing funnel cloud on Highway T19 about 5 miles north of Wellsburg.


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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 0 363.00K 345.00K
NAPIER BOONE CO. IA 06/25/2008 17:47 CST-6 Hail 1.50 in. 0 0 5.00K 10.00K
SHELDAHL BOONE CO. IA 06/25/2008 17:47 CST-6 Hail 1.00 in. 0 0 3.00K 10.00K
SHELDAHL BOONE CO. IA 06/25/2008 17:50 CST-6 Hail 2.50 in. 0 0 20.00K 10.00K
NAPIER BOONE CO. IA 06/25/2008 17:52 CST-6 Hail 3.00 in. 0 0 20.00K 10.00K
NAPIER BOONE CO. IA 06/25/2008 17:56 CST-6 Hail 1.50 in. 0 0 5.00K 10.00K
WINDSOR HGTS POLK CO. IA 06/25/2008 17:59 CST-6 Hail 0.88 in. 0 0 5.00K 0.00K
POLK CITY POLK CO. IA 06/25/2008 18:00 CST-6 Heavy Rain 0 0 0.00K 0.00K
KELLEY STORY CO. IA 06/25/2008 18:01 CST-6 Hail 1.75 in. 0 0 5.00K 10.00K
KELLEY STORY CO. IA 06/25/2008 18:02 CST-6 Hail 1.00 in. 0 0 3.00K 10.00K
GRANGER DALLAS CO. IA 06/25/2008 18:03 CST-6 Hail 0.88 in. 0 0 3.00K 10.00K
SHIPLEY STORY CO. IA 06/25/2008 18:07 CST-6 Hail 1.00 in. 0 0 2.00K 10.00K
AMES ARPT STORY CO. IA 06/25/2008 18:08 CST-6 Hail 0.88 in. 0 0 2.00K 10.00K
HERROLD POLK CO. IA 06/25/2008 18:11 CST-6 Hail 0.75 in. 0 0 0.00K 10.00K
NEVADA STORY CO. IA 06/25/2008 18:14 CST-6 Hail 0.75 in. 0 0 0.00K 0.00K
GRANGER DALLAS CO. IA 06/25/2008 18:18 CST-6 Hail 0.88 in. 0 0 1.00K 10.00K
HUBBARD HARDIN CO. IA 06/25/2008 18:19 CST-6 Hail 0.88 in. 0 0 1.00K 15.00K
NEVADA STORY CO. IA 06/25/2008 18:22 CST-6 Hail 1.75 in. 0 0 5.00K 10.00K
NEVADA STORY CO. IA 06/25/2008 18:23 CST-6 Hail 1.50 in. 0 0 10.00K 0.00K
IOWA CENTER STORY CO. IA 06/25/2008 18:26 CST-6 Hail 1.50 in. 0 0 5.00K 15.00K
COLO STORY CO. IA 06/25/2008 18:28 CST-6 Hail 1.00 in. 0 0 2.00K 10.00K
AMES STORY CO. IA 06/25/2008 18:29 CST-6 Hail 1.00 in. 0 0 2.00K 10.00K
NEVADA STORY CO. IA 06/25/2008 18:30 CST-6 Hail 2.00 in. 0 0 20.00K 0.00K
NEVADA STORY CO. IA 06/25/2008 18:31 CST-6 Hail 1.00 in. 0 0 5.00K 0.00K
MORAN DALLAS CO. IA 06/25/2008 18:33 CST-6 Hail 1.75 in. 0 0 10.00K 20.00K
ST ANTHONY MARSHALL CO. IA 06/25/2008 18:33 CST-6 Hail 1.75 in. 0 0 5.00K 10.00K
ELLSWORTH HAMILTON CO. IA 06/25/2008 18:35 CST-6 Hail 1.00 in. 0 0 3.00K 10.00K
NEVADA STORY CO. IA 06/25/2008 18:35 CST-6 Hail 2.60 in. 0 0 15.00K 0.00K
NEVADA STORY CO. IA 06/25/2008 18:35 CST-6 Hail 1.75 in. 0 0 15.00K 0.00K
NEVADA STORY CO. IA 06/25/2008 18:37 CST-6 Hail 1.00 in. 0 0 3.00K 0.00K
SAYLORVILLE POLK CO. IA 06/25/2008 18:40 CST-6 Lightning 0 0 10.00K 0.00K
MORAN DALLAS CO. IA 06/25/2008 18:42 CST-6 Hail 0.88 in. 0 0 0.00K 10.00K
WELLSBURG GRUNDY CO. IA 06/25/2008 19:07 CST-6 Funnel Cloud 0 0 0.00K 0.00K
HUXLEY STORY CO. IA 06/25/2008 19:19 CST-6 Hail 0.75 in. 0 0 0.00K 5.00K
DANA GREENE CO. IA 06/25/2008 19:22 CST-6 Hail 0.88 in. 0 0 1.00K 5.00K
GRAND JCT GREENE CO. IA 06/25/2008 19:34 CST-6 Hail 1.50 in. 0 0 5.00K 10.00K
TOLEDO TAMA CO. IA 06/25/2008 19:38 CST-6 Thunderstorm Wind 52 kts. EG 0 0 1.00K 0.00K
BERKLEY BOONE CO. IA 06/25/2008 19:52 CST-6 Hail 1.25 in. 0 0 5.00K 5.00K
DES MOINES POLK CO. IA 06/25/2008 20:00 CST-6 Hail 0.88 in. 0 0 2.00K 0.00K
RIPPEY GREENE CO. IA 06/25/2008 20:00 CST-6 Hail 0.88 in. 0 0 2.00K 0.00K
BERKLEY BOONE CO. IA 06/25/2008 20:12 CST-6 Hail 1.00 in. 0 0 1.00K 10.00K
DES MOINES POLK CO. IA 06/25/2008 20:12 CST-6 Hail 1.25 in. 0 0 5.00K 0.00K
ASHAWA POLK CO. IA 06/25/2008 20:35 CST-6 Hail 1.00 in. 0 0 5.00K 0.00K
CLARKSON WARREN CO. IA 06/25/2008 20:37 CST-6 Hail 1.00 in. 0 0 3.00K 10.00K
HADDEN HILL DALLAS CO. IA 06/25/2008 20:38 CST-6 Thunderstorm Wind 56 kts. EG 0 0 0.00K 0.00K
POLK CITY POLK CO. IA 06/25/2008 20:40 CST-6 Flash Flood 0 0 10.00K 0.00K
HADDEN HILL DALLAS CO. IA 06/25/2008 20:41 CST-6 Thunderstorm Wind 52 kts. EG 0 0 0.00K 0.00K
HADDEN HILL DALLAS CO. IA 06/25/2008 20:43 CST-6 Thunderstorm Wind 61 kts. EG 0 0 5.00K 5.00K
URBANDALE POLK CO. IA 06/25/2008 20:44 CST-6 Hail 1.75 in. 0 0 50.00K 0.00K
URBANDALE POLK CO. IA 06/25/2008 20:44 CST-6 Hail 0.88 in. 0 0 2.00K 0.00K
(DSM)DES MOINES INTL POLK CO. IA 06/25/2008 20:45 CST-6 Thunderstorm Wind 54 kts. MG 0 0 2.00K 0.00K
ASHAWA POLK CO. IA 06/25/2008 20:45 CST-6 Hail 1.00 in. 0 0 5.00K 0.00K
HADDEN HILL DALLAS CO. IA 06/25/2008 20:46 CST-6 Hail 0.88 in. 0 0 1.00K 0.00K
HADDEN HILL DALLAS CO. IA 06/25/2008 20:53 CST-6 Thunderstorm Wind 59 kts. MG 0 0 10.00K 15.00K
(DSM)DES MOINES INTL POLK CO. IA 06/25/2008 20:59 CST-6 Hail 1.00 in. 0 0 5.00K 0.00K
COMMERCE POLK CO. IA 06/25/2008 21:00 CST-6 Hail 0.75 in. 0 0 0.00K 0.00K
FT DES MOINES POLK CO. IA 06/25/2008 21:03 CST-6 Hail 1.00 in. 0 0 3.00K 0.00K
NORWALK WARREN CO. IA 06/25/2008 21:03 CST-6 Thunderstorm Wind 56 kts. EG 0 0 10.00K 5.00K
NORWALK WARREN CO. IA 06/25/2008 21:07 CST-6 Thunderstorm Wind 52 kts. EG 0 0 2.00K 0.00K
NORWALK WARREN CO. IA 06/25/2008 21:07 CST-6 Hail 0.88 in. 0 0 3.00K 5.00K
FT DES MOINES POLK CO. IA 06/25/2008 21:10 CST-6 Hail 1.25 in. 0 0 10.00K 0.00K
NORWALK WARREN CO. IA 06/25/2008 21:10 CST-6 Hail 0.88 in. 0 0 3.00K 10.00K
NORWALK WARREN CO. IA 06/25/2008 21:10 CST-6 Thunderstorm Wind 61 kts. EG 0 0 20.00K 10.00K
LACONA WARREN CO. IA 06/25/2008 21:38 CST-6 Hail 1.75 in. 0 0 5.00K 10.00K
(OTM)OTTUMWA INDSTRL WAPELLO CO. IA 06/25/2008 21:53 CST-6 Heavy Rain 0 0 0.00K 0.00K
OSCEOLA MUNI ARPT CLARKE CO. IA 06/25/2008 22:32 CST-6 Hail 0.88 in. 0 0 2.00K 10.00K
Totals: 0 0 363.00K 345.00K