Storm Events Database

Event Details

Event Hail
Magnitude 0.75 in.
State IOWA
County/Area SAC
WFO DMX
Report Source Trained Spotter
NCDC Data Source CSV
Begin Date 2010-06-17 18:50:00.0 CST-6
Begin Location 1SW NEMAHA
Begin Lat/Lon 42.51/-95.09
End Date 2010-06-17 18:50:00.0 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 Warm and very humid air moved north into Iowa during the day on the 17th. Surface temperatures warmed into the mid 80s to low 90s, with dew point temperatures in the mid 70s to around 80 by mid afternoon. A weak cold front was approaching the state at the same time that a negatively tilted shortwave lifted northeast across the upper Midwest. The atmosphere became very unstable with lifted indices falling to around -9 C. CAPE rose to between 3000 and 4500 J/kg by late afternoon. Downdraft CAPE was around 1500 J/kg with available CAPE in the -10 to -30 C layer of the atmosphere between 800 and 1100 J/kg. With the humid airmass, precipitable water values were between 1.8 and 2 inches, resulting in a relatively low LCL level of 750 to 1000 meters. The freezing level was relatively high, around 14,500 feet. The shear was not all that strong, ranging from around 35 kts over northern Iowa to 20 over the southwest. Thunderstorms fired up initially during the mid to late afternoon hours. The storms consolidated into a solid line during the evening and advanced east-southeast across the state. During the early stages of the development, the thunderstorms produced several tornadoes. One touched down briefly near Lakota in Kossuth County along U.S. Highway 169. A second tornado tracked from southwest of Lakota to north of the city. A third tornado was on the ground briefly east of Rake in Winnebago County. The storms then transitioned into more of a wind and hail event. Due to the warm conditions aloft, most of the hail was only around in inch or so in diameter. Golf ball size hail fell in the Buffalo Center area of Winnebago County. The largest hail was a report of baseball size hail west of Ledyard in Kossuth County. Winds increased as the evening went on and the system accelerated. Tree damage was reported in several locations with winds gusting in the 60 to 70 MPH range.
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 0 291.00K 150.00K
RINGSTED EMMET CO. IA 06/17/2010 15:13 CST-6 Hail 0.88 in. 0 0 1.00K 5.00K
SWEA CITY KOSSUTH CO. IA 06/17/2010 15:30 CST-6 Hail 0.88 in. 0 0 1.00K 5.00K
SWEA CITY KOSSUTH CO. IA 06/17/2010 15:35 CST-6 Hail 1.00 in. 0 0 3.00K 5.00K
WHITTEMORE KOSSUTH CO. IA 06/17/2010 15:35 CST-6 Funnel Cloud 0 0 0.00K 0.00K
SENECA KOSSUTH CO. IA 06/17/2010 15:37 CST-6 Funnel Cloud 0 0 0.00K 0.00K
SWEA CITY KOSSUTH CO. IA 06/17/2010 15:40 CST-6 Funnel Cloud 0 0 0.00K 0.00K
SENECA KOSSUTH CO. IA 06/17/2010 15:45 CST-6 Hail 1.25 in. 0 0 5.00K 5.00K
SWEA CITY KOSSUTH CO. IA 06/17/2010 15:47 CST-6 Funnel Cloud 0 0 0.00K 0.00K
SENECA KOSSUTH CO. IA 06/17/2010 15:55 CST-6 Funnel Cloud 0 0 0.00K 0.00K
BANCROFT KOSSUTH CO. IA 06/17/2010 15:58 CST-6 Funnel Cloud 0 0 0.00K 0.00K
LONE ROCK KOSSUTH CO. IA 06/17/2010 15:58 CST-6 Funnel Cloud 0 0 0.00K 0.00K
STEVENS KOSSUTH CO. IA 06/17/2010 15:58 CST-6 Funnel Cloud 0 0 0.00K 0.00K
LAKOTA KOSSUTH CO. IA 06/17/2010 16:08 CST-6 Hail 1.00 in. 0 0 5.00K 5.00K
GERLED KOSSUTH CO. IA 06/17/2010 16:10 CST-6 Funnel Cloud 0 0 0.00K 0.00K
GERLED KOSSUTH CO. IA 06/17/2010 16:10 CST-6 Funnel Cloud 0 0 0.00K 0.00K
GERLED KOSSUTH CO. IA 06/17/2010 16:11 CST-6 Tornado EF0 0 0 0.00K 5.00K
LEDYARD KOSSUTH CO. IA 06/17/2010 16:12 CST-6 Hail 3.00 in. 0 0 15.00K 50.00K
LEDYARD KOSSUTH CO. IA 06/17/2010 16:14 CST-6 Hail 2.75 in. 0 0 20.00K 10.00K
STEVENS KOSSUTH CO. IA 06/17/2010 16:18 CST-6 Hail 1.50 in. 0 0 5.00K 10.00K
STEVENS KOSSUTH CO. IA 06/17/2010 16:24 CST-6 Tornado EF0 0 0 0.00K 0.00K
RAKE WINNEBAGO CO. IA 06/17/2010 16:25 CST-6 Hail 1.75 in. 0 0 10.00K 10.00K
LEDYARD KOSSUTH CO. IA 06/17/2010 16:32 CST-6 Funnel Cloud 0 0 0.00K 0.00K
STEVENS KOSSUTH CO. IA 06/17/2010 16:37 CST-6 Funnel Cloud 0 0 0.00K 0.00K
BUFFALO CENTER WINNEBAGO CO. IA 06/17/2010 16:40 CST-6 Hail 1.75 in. 0 0 5.00K 10.00K
RAKE WINNEBAGO CO. IA 06/17/2010 17:05 CST-6 Tornado EF0 0 0 0.00K 0.00K
CURLEW PALO ALTO CO. IA 06/17/2010 18:09 CST-6 Hail 0.88 in. 0 0 1.00K 5.00K
CYLINDER PALO ALTO CO. IA 06/17/2010 18:40 CST-6 Hail 0.88 in. 0 0 1.00K 5.00K
NEMAHA SAC CO. IA 06/17/2010 18:50 CST-6 Hail 0.75 in. 0 0 0.00K 5.00K
WESLEY KOSSUTH CO. IA 06/17/2010 19:15 CST-6 Thunderstorm Wind 65 kts. EG 0 0 20.00K 0.00K
ROLFE POCAHONTAS CO. IA 06/17/2010 19:20 CST-6 Thunderstorm Wind 52 kts. EG 0 0 10.00K 0.00K
ALGONA KOSSUTH CO. IA 06/17/2010 19:25 CST-6 Thunderstorm Wind 57 kts. EG 0 0 25.00K 0.00K
FOREST CITY WINNEBAGO CO. IA 06/17/2010 19:30 CST-6 Thunderstorm Wind 61 kts. EG 0 0 50.00K 0.00K
HANNA KOSSUTH CO. IA 06/17/2010 19:37 CST-6 Hail 1.00 in. 0 0 2.00K 5.00K
KANAWHA HANCOCK CO. IA 06/17/2010 20:02 CST-6 Thunderstorm Wind 52 kts. EG 0 0 5.00K 0.00K
KANAWHA HANCOCK CO. IA 06/17/2010 20:02 CST-6 Hail 1.00 in. 0 0 2.00K 5.00K
RUTLAND HUMBOLDT CO. IA 06/17/2010 20:04 CST-6 Thunderstorm Wind 50 kts. EG 0 0 5.00K 0.00K
(MCW)MASON CITY MUNI CERRO GORDO CO. IA 06/17/2010 20:05 CST-6 Thunderstorm Wind 50 kts. MG 0 0 2.00K 0.00K
CLEAR LAKE CERRO GORDO CO. IA 06/17/2010 20:10 CST-6 Thunderstorm Wind 52 kts. EG 0 0 10.00K 0.00K
MASON CITY CERRO GORDO CO. IA 06/17/2010 20:14 CST-6 Thunderstorm Wind 57 kts. EG 0 0 50.00K 0.00K
MASON CITY CERRO GORDO CO. IA 06/17/2010 20:15 CST-6 Thunderstorm Wind 51 kts. MG 0 0 10.00K 0.00K
PLYMOUTH CERRO GORDO CO. IA 06/17/2010 20:17 CST-6 Thunderstorm Wind 52 kts. EG 0 0 10.00K 0.00K
CARROLL NEU ARPT CARROLL CO. IA 06/17/2010 20:53 CST-6 Thunderstorm Wind 54 kts. MG 0 0 5.00K 0.00K
CLARION WRIGHT CO. IA 06/17/2010 20:57 CST-6 Thunderstorm Wind 52 kts. EG 0 0 5.00K 0.00K
DOWS WRIGHT CO. IA 06/17/2010 21:10 CST-6 Thunderstorm Wind 56 kts. MG 0 0 0.00K 0.00K
OWASA HARDIN CO. IA 06/17/2010 21:42 CST-6 Thunderstorm Wind 52 kts. EG 0 0 3.00K 0.00K
EXIRA AUDUBON CO. IA 06/17/2010 22:30 CST-6 Hail 1.25 in. 0 0 5.00K 5.00K
Totals: 0 0 291.00K 150.00K