Storm Events Database

Event Details

Event Thunderstorm Wind
Magnitude 52 kts.
State IOWA
County/Area SAC
WFO DMX
Report Source Law Enforcement
NCDC Data Source CSV
Begin Date 2011-07-01 18:20:00.0 CST-6
Begin Location 1SE LAKE VIEW
Begin Lat/Lon 42.31/-95.03
End Date 2011-07-01 18:20:00.0 CST-6
Deaths Direct/Indirect 0/0 (fatality details below, when available...)
Injuries Direct/Indirect 0/0
Property Damage 10.00K
Crop Damage 0.00K
Episode Narrative Very warm and humid air was in place over Iowa during the 30th and the 1st with high temperatures in the 90s and dew points in the mid 70s to low 80s. The airmass was capped on the 30th, and remained fairly capped on the evening of the 1st as a cold front moves southeast into the state. The cap weakened first over northern Iowa and then gradually farther to the south as the night progressed. The freezing level was quite high, in the 14,500 to 15,000 foot range. In spite of CAPE values in the -10 to -30 C layer of the atmosphere in the 400 to 700 J/kg range, hail production was limited with only spot reports of golf ball to ping pong ball size hail. Precipitable water increased to around 1.5 inches during the evening. CAPE was around 4000 J/kg, with the lifted index around -10 C. A narrow line of thunderstorms formed along the cold front with the main mode of severe weather being high winds. Downdraft CAPE was high, around 1500 J/kg. This resulted in wind of 60 to 70 MPH at several locations. The factor against the stronger storm development was the lack of shear, with only 20 kts available. There were numerous reports of trees and power lines being downed by the high winds. A boat was blown from a dock into a house in the Clear Lake area. Windows were also blown out of a house there as well. Power was knocked out to about 1000 customers in the Mason City, Clear Lake Area.
Event Narrative A large branch fell onto a car causing significant damage.


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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 0 358.00K 75.00K
DELOIT CRAWFORD CO. IA 07/01/2011 17:55 CST-6 Hail 1.75 in. 0 0 20.00K 10.00K
LAKE VIEW SAC CO. IA 07/01/2011 18:20 CST-6 Thunderstorm Wind 52 kts. EG 0 0 10.00K 0.00K
MAPLE HILL EMMET CO. IA 07/01/2011 18:20 CST-6 Thunderstorm Wind 57 kts. EG 0 0 5.00K 0.00K
YETTER CALHOUN CO. IA 07/01/2011 18:45 CST-6 Hail 0.88 in. 0 0 0.00K 10.00K
SWEA CITY KOSSUTH CO. IA 07/01/2011 19:10 CST-6 Thunderstorm Wind 57 kts. EG 0 0 15.00K 0.00K
ROLFE POCAHONTAS CO. IA 07/01/2011 19:20 CST-6 Thunderstorm Wind 57 kts. EG 0 0 10.00K 0.00K
LAKE MILLS WINNEBAGO CO. IA 07/01/2011 20:00 CST-6 Hail 1.50 in. 0 0 15.00K 10.00K
THOMPSON WINNEBAGO CO. IA 07/01/2011 20:00 CST-6 Thunderstorm Wind 57 kts. EG 0 0 25.00K 5.00K
LOHRVILLE CALHOUN CO. IA 07/01/2011 20:03 CST-6 Hail 0.88 in. 0 0 3.00K 10.00K
NORTHWOOD WORTH CO. IA 07/01/2011 20:16 CST-6 Thunderstorm Wind 57 kts. EG 0 0 25.00K 0.00K
OTHO WEBSTER CO. IA 07/01/2011 20:26 CST-6 Thunderstorm Wind 57 kts. EG 0 0 10.00K 0.00K
CLEAR LAKE CERRO GORDO CO. IA 07/01/2011 20:40 CST-6 Thunderstorm Wind 61 kts. EG 0 0 10.00K 0.00K
CLEAR LAKE CERRO GORDO CO. IA 07/01/2011 20:40 CST-6 Thunderstorm Wind 61 kts. EG 0 0 125.00K 0.00K
CLEAR LAKE CERRO GORDO CO. IA 07/01/2011 20:40 CST-6 Thunderstorm Wind 57 kts. EG 0 0 15.00K 0.00K
WEBSTER CITY HAMILTON CO. IA 07/01/2011 20:50 CST-6 Thunderstorm Wind 57 kts. EG 0 0 10.00K 0.00K
MASON CITY CERRO GORDO CO. IA 07/01/2011 21:08 CST-6 Hail 1.00 in. 0 0 5.00K 10.00K
LATIMER FRANKLIN CO. IA 07/01/2011 21:15 CST-6 Thunderstorm Wind 57 kts. EG 0 0 5.00K 0.00K
HAMPTON FRANKLIN CO. IA 07/01/2011 21:20 CST-6 Thunderstorm Wind 57 kts. EG 0 0 15.00K 0.00K
MONTEITH GUTHRIE CO. IA 07/01/2011 21:40 CST-6 Hail 1.00 in. 0 0 2.00K 10.00K
JEWELL HAMILTON CO. IA 07/01/2011 21:43 CST-6 Hail 1.00 in. 0 0 3.00K 10.00K
HERNDON GUTHRIE CO. IA 07/01/2011 21:50 CST-6 Thunderstorm Wind 52 kts. EG 0 0 15.00K 0.00K
PERRY DALLAS CO. IA 07/01/2011 22:19 CST-6 Thunderstorm Wind 57 kts. EG 0 0 10.00K 0.00K
WELLSBURG GRUNDY CO. IA 07/01/2011 22:29 CST-6 Thunderstorm Wind 52 kts. EG 0 0 5.00K 0.00K
Totals: 0 0 358.00K 75.00K