Storm Events Database

Event Details

Event Hail
Magnitude 1.75 in.
State IOWA
County/Area PALO ALTO
WFO DMX
Report Source Trained Spotter
NCDC Data Source CSV
Begin Date 2010-04-12 14:15:00.0 CST-6
Begin Location 1SE EMMETSBURG
Begin Lat/Lon 43.11/-94.68
End Date 2010-04-12 14:15:00.0 CST-6
Deaths Direct/Indirect 0/0 (fatality details below, when available...)
Injuries Direct/Indirect 0/0
Property Damage 25.00K
Crop Damage 0.00K
Episode Narrative A warm front was positioned from northeast Nebraska, southeast across central into east central Iowa. Thunderstorms fired north of the front during the night, and the activity continued into the day. A 25 kt low level jet continued to feed moisture into the atmosphere during the day. By early to mid afternoon, most unstable CAPE reached 1900 J/kg, with lifted indices around -7 C. Though there was considerable downdraft CAPE available at around 1400 J/kg, it was not realized. The atmosphere was weakly sheared with about 30 kts of shear present. Hail was the main feature with the storms. The freezing level was low, sloping from around 9600 feet over central Minnesota, to 10,800 feet at Omaha. Numerous reports of hail ranging from nickel to golf ball size were received. Golf ball size hail fell in Kossuth and Pocahontas Counties. Many locations reported that the hail covered the ground. The storms also produced very heavy rainfall. With over an inch of precipitable water available, the storms were quite efficient. Two to two and one half inches of rainfall was reported from near Spencer to Thompson. Though flash flooding did not occur, the heavy rain pushed rivers over flood stage.
Event Narrative Largest hail was on the south side of town where golf ball size hail was reported. Quarter size hail fell on the north side of town.


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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 83.00K 0.00K
EMMETSBURG ARPT PALO ALTO CO. IA 04/12/2010 14:07 CST-6 Hail 1.00 in. 0 0 3.00K 0.00K
EMMETSBURG PALO ALTO CO. IA 04/12/2010 14:09 CST-6 Hail 1.25 in. 0 0 5.00K 0.00K
EMMETSBURG PALO ALTO CO. IA 04/12/2010 14:10 CST-6 Hail 1.00 in. 0 0 3.00K 0.00K
EMMETSBURG ARPT PALO ALTO CO. IA 04/12/2010 14:13 CST-6 Hail 1.25 in. 0 0 5.00K 0.00K
EMMETSBURG PALO ALTO CO. IA 04/12/2010 14:15 CST-6 Hail 1.75 in. 0 0 25.00K 0.00K
CORWITH HANCOCK CO. IA 04/12/2010 15:35 CST-6 Hail 0.88 in. 0 0 0.00K 0.00K
ALGONA KOSSUTH CO. IA 04/12/2010 15:37 CST-6 Hail 0.88 in. 0 0 0.00K 0.00K
ALGONA KOSSUTH CO. IA 04/12/2010 15:38 CST-6 Hail 1.50 in. 0 0 10.00K 0.00K
ALGONA KOSSUTH CO. IA 04/12/2010 15:39 CST-6 Hail 1.75 in. 0 0 25.00K 0.00K
ALGONA KOSSUTH CO. IA 04/12/2010 15:41 CST-6 Hail 1.00 in. 0 0 2.00K 0.00K
ALGONA KOSSUTH CO. IA 04/12/2010 15:47 CST-6 Hail 1.00 in. 0 0 3.00K 0.00K
DENHART HANCOCK CO. IA 04/12/2010 17:00 CST-6 Hail 1.00 in. 0 0 2.00K 0.00K
Totals: 0 0 83.00K 0.00K