Storm Events Database

Event Details

Event Heavy Snow
State IOWA
County/Area SAC
WFO DMX
Report Source Trained Spotter
NCDC Data Source CSV
Begin Date 2009-12-08 02:00:00.0 CST-6
End Date 2009-12-09 04:00:00.0 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 An intense low pressure system moved into southern California during the afternoon and evening of the 7th, then tracked northeast across the central U.S. the surface low reached Kansas during the morning of the 8th, eastern Kansas by evening, and tracked to northern Illinois before sunrise on the 8th. The storm intensified rapidly, reaching 975 mb by the afternoon of the 9th as it crossed Lower Michigan. Snow broke out across Iowa during the overnight hours of the 7th into the early morning hours of the 8th. The snow continued through the day on the 8th. Northeast winds of 15 to 25 MPH caused drifting snow through the day and into the evening. Snowfall reached an inch per hour at times during several heavier waves of snowfall during the afternoon and evening of the 8th. A broad band of 8 to 16 inch snowfall totals were reported across much of the northwest two thirds of the state. There were isolated reports of thundersnow over southwest into central Iowa. Some of the heavier snowfall totals included 20 inches in Sac County at Schaller, 16.2 inches in Adams County at Corning, 16 inches in Cass County at Atlantic, 15.7 inches at the Des Moines Airport, and 15.3 inches in Windsor Heights, both in Polk County. The entire CWA received at least 4-6 inches from the storm over a 36 hour period. In terms of snowfall across the state, this storm produced the greatest snowfall /10.2 inches average/ of any storm since 1971. The snow became mixed with freezing rain and ice pellets over the southeast third of the state, and even turned to all freezing rain for a few hours southeast of a Lamoni to Ottumwa line. Ice accrual was generally under one tenth of an inch. Road conditions became hazardous with most businesses and schools closing by the early to mid afternoon hours of the 8th due to the poor conditions.
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 0 430.00K 0.00K
JASPER (ZONE) JASPER (ZONE) IA 12/07/2009 23:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
POLK (ZONE) POLK (ZONE) IA 12/07/2009 23:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
MADISON (ZONE) MADISON (ZONE) IA 12/07/2009 23:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
WARREN (ZONE) WARREN (ZONE) IA 12/07/2009 23:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
TAYLOR (ZONE) TAYLOR (ZONE) IA 12/07/2009 23:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
MARION (ZONE) MARION (ZONE) IA 12/07/2009 23:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
ADAIR (ZONE) ADAIR (ZONE) IA 12/07/2009 23:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
AUDUBON (ZONE) AUDUBON (ZONE) IA 12/07/2009 23:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
ADAMS (ZONE) ADAMS (ZONE) IA 12/07/2009 23:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
UNION (ZONE) UNION (ZONE) IA 12/07/2009 23:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
GUTHRIE (ZONE) GUTHRIE (ZONE) IA 12/07/2009 23:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
DECATUR (ZONE) DECATUR (ZONE) IA 12/07/2009 23:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
WAYNE (ZONE) WAYNE (ZONE) IA 12/07/2009 23:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
LUCAS (ZONE) LUCAS (ZONE) IA 12/07/2009 23:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
CLARKE (ZONE) CLARKE (ZONE) IA 12/07/2009 23:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
CASS (ZONE) CASS (ZONE) IA 12/07/2009 23:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
RINGGOLD (ZONE) RINGGOLD (ZONE) IA 12/07/2009 23:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
DALLAS (ZONE) DALLAS (ZONE) IA 12/07/2009 23:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
CARROLL (ZONE) CARROLL (ZONE) IA 12/08/2009 02:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
BUTLER (ZONE) BUTLER (ZONE) IA 12/08/2009 02:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
HAMILTON (ZONE) HAMILTON (ZONE) IA 12/08/2009 02:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
MARSHALL (ZONE) MARSHALL (ZONE) IA 12/08/2009 02:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
CRAWFORD (ZONE) CRAWFORD (ZONE) IA 12/08/2009 02:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
BLACK HAWK (ZONE) BLACK HAWK (ZONE) IA 12/08/2009 02:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
WRIGHT (ZONE) WRIGHT (ZONE) IA 12/08/2009 02:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
FRANKLIN (ZONE) FRANKLIN (ZONE) IA 12/08/2009 02:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
GRUNDY (ZONE) GRUNDY (ZONE) IA 12/08/2009 02:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
TAMA (ZONE) TAMA (ZONE) IA 12/08/2009 02:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
POWESHIEK (ZONE) POWESHIEK (ZONE) IA 12/08/2009 02:00 CST-6 Heavy Snow 0 0 0.00K 0.00K
SAC (ZONE) SAC (ZONE) IA 12/08/2009 02:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
POCAHONTAS (ZONE) POCAHONTAS (ZONE) IA 12/08/2009 02:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
HARDIN (ZONE) HARDIN (ZONE) IA 12/08/2009 02:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
HUMBOLDT (ZONE) HUMBOLDT (ZONE) IA 12/08/2009 02:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
BOONE (ZONE) BOONE (ZONE) IA 12/08/2009 02:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
WEBSTER (ZONE) WEBSTER (ZONE) IA 12/08/2009 02:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
BREMER (ZONE) BREMER (ZONE) IA 12/08/2009 02:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
GREENE (ZONE) GREENE (ZONE) IA 12/08/2009 02:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
STORY (ZONE) STORY (ZONE) IA 12/08/2009 02:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
CALHOUN (ZONE) CALHOUN (ZONE) IA 12/08/2009 02:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
KOSSUTH (ZONE) KOSSUTH (ZONE) IA 12/08/2009 02:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
WORTH (ZONE) WORTH (ZONE) IA 12/08/2009 04:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
CERRO GORDO (ZONE) CERRO GORDO (ZONE) IA 12/08/2009 04:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
HANCOCK (ZONE) HANCOCK (ZONE) IA 12/08/2009 04:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
WINNEBAGO (ZONE) WINNEBAGO (ZONE) IA 12/08/2009 04:00 CST-6 Heavy Snow 0 0 10.00K 0.00K
Totals: 0 0 430.00K 0.00K