Storm Events Database

Event Details

Event High Wind
Magnitude 51 kts.
State IOWA
County/Area SAC
WFO DMX
Report Source Mesonet
NCDC Data Source CSV
Begin Date 2009-02-09 18:00:00.0 CST-6
End Date 2009-02-09 23:30:00.0 CST-6
Deaths Direct/Indirect 0/0 (fatality details below, when available...)
Injuries Direct/Indirect 0/0
Property Damage 5.00K
Crop Damage 0.00K
Episode Narrative A very strong low pressure system lifted northeast from north central Nebraska into east central South Dakota during the evening of the 9th. The system was very dynamic, being a negatively tilted trough in the mid and upper levels of the atmosphere. A strong gradient was in place across Iowa, with winds of 75 kts within two thousand feet of the surface. The dry slot lifted across the state and strong winds formed in the subsidence region. An area of showers rotated into the dry slot over the northwest third of the state. The rain resulted in cooling in the low levels through evaporational cooling to help bring the winds down to the surface. In addition a few areas around the rest of the state reported breakthrough winds near high wind category. One location was in Marion County at Pella, where a 59 MPH wind gust was recorded. Another break through area occurred in Polk County in Ankeny, where high winds resulted in minor damage to a house there. The greatest area of high winds was in a band about 40 to 50 miles wide extending from northeast of Denison, northeast into Hancock County. Sustained winds of 30 to 35 MPH were recorded, with gusts of near 60 MPH at several locations. Two semi-tractortrailer trucks were overturned by the winds. One was near Britt, in Hancock County, the other near Thompson in Winnebago County.
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 0 110.00K 0.00K
HANCOCK (ZONE) HANCOCK (ZONE) IA 02/09/2009 18:00 CST-6 High Wind 50 kts. EG 0 0 30.00K 0.00K
HUMBOLDT (ZONE) HUMBOLDT (ZONE) IA 02/09/2009 18:00 CST-6 High Wind 52 kts. MG 0 0 5.00K 0.00K
CARROLL (ZONE) CARROLL (ZONE) IA 02/09/2009 18:00 CST-6 High Wind 52 kts. MG 0 0 5.00K 0.00K
WEBSTER (ZONE) WEBSTER (ZONE) IA 02/09/2009 18:00 CST-6 High Wind 52 kts. MG 0 0 5.00K 0.00K
CALHOUN (ZONE) CALHOUN (ZONE) IA 02/09/2009 18:00 CST-6 High Wind 50 kts. EG 0 0 5.00K 0.00K
KOSSUTH (ZONE) KOSSUTH (ZONE) IA 02/09/2009 18:00 CST-6 High Wind 50 kts. EG 0 0 5.00K 0.00K
POCAHONTAS (ZONE) POCAHONTAS (ZONE) IA 02/09/2009 18:00 CST-6 High Wind 50 kts. EG 0 0 5.00K 0.00K
WINNEBAGO (ZONE) WINNEBAGO (ZONE) IA 02/09/2009 18:00 CST-6 High Wind 50 kts. EG 0 0 30.00K 0.00K
SAC (ZONE) SAC (ZONE) IA 02/09/2009 18:00 CST-6 High Wind 51 kts. MG 0 0 5.00K 0.00K
WRIGHT (ZONE) WRIGHT (ZONE) IA 02/09/2009 18:00 CST-6 High Wind 50 kts. EG 0 0 5.00K 0.00K
POLK (ZONE) POLK (ZONE) IA 02/09/2009 22:30 CST-6 High Wind 50 kts. EG 0 0 5.00K 0.00K
MARION (ZONE) MARION (ZONE) IA 02/09/2009 22:30 CST-6 High Wind 51 kts. MG 0 0 5.00K 0.00K
Totals: 0 0 110.00K 0.00K