Storm Events Database

Event Details

Event Ice Storm
State IOWA
County/Area SAC
WFO DMX
Report Source Trained Spotter
NCDC Data Source CSV
Begin Date 2009-12-23 10:00:00.0 CST-6
End Date 2009-12-23 22:00:00.0 CST-6
Deaths Direct/Indirect 0/0 (fatality details below, when available...)
Injuries Direct/Indirect 0/0
Property Damage 500.00K
Crop Damage 0.00K
Episode Narrative Part 1 of 2: A major winter storm system affected the central U.S. during Christmas week. There were two upper level systems involved with this storm. The southern stream low dove into the southern U.S. and then turned northeast. The turn was sharper than is typical as the northern stream upper low pushed southeast. The southern stream and polar low interacted with each other, resulting in a Fuji Wara effect. The southern low turned north, then eventually northwest and moved from northern Louisiana into Iowa. This resulted in a considerable amount of warm air being drawn north over Iowa. Cold air remained in place at the surface due to an existing deep snow cover over most of the state and a polar high pressure over western Ontario. Freezing rain broke out on the morning of the 23rd over west central Iowa, and spread into the north central counties by the afternoon of the 23rd. Freezing rain continued through the rest of the day, tapering off during the early morning hours of the 24th. To the north of the freezing rain area, 3 to 5 inches of snowfall occurred. Much of the area received one quarter to one half inch of ice. The hardest hit areas were from Audubon and Guthrie Counties, north into Carroll, Calhoun, and parts of Crawford Counties. At one point, reports indicated that power was out in 65% of the homes in Audubon, Crawford, and Carroll Counties. These areas received in excess of 1 inch of freezing rain. Tree and power line damage was widespread in these areas. Over 10,000 customers lost power in these counties, some for several days. Farther to the north and east there was damage with patchy power outages, but the damage was not as severe as to the southwest. Driving conditions were treacherous through the entire area with accidents and spin-outs too numerous to mention.
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 14.500M 0.00K
ADAIR (ZONE) ADAIR (ZONE) IA 12/23/2009 10:00 CST-6 Ice Storm 0 0 500.00K 0.00K
AUDUBON (ZONE) AUDUBON (ZONE) IA 12/23/2009 10:00 CST-6 Ice Storm 0 0 2.000M 0.00K
CRAWFORD (ZONE) CRAWFORD (ZONE) IA 12/23/2009 10:00 CST-6 Ice Storm 0 0 1.500M 0.00K
GUTHRIE (ZONE) GUTHRIE (ZONE) IA 12/23/2009 10:00 CST-6 Ice Storm 0 0 1.000M 0.00K
CARROLL (ZONE) CARROLL (ZONE) IA 12/23/2009 10:00 CST-6 Ice Storm 0 0 2.000M 0.00K
SAC (ZONE) SAC (ZONE) IA 12/23/2009 10:00 CST-6 Ice Storm 0 0 500.00K 0.00K
CALHOUN (ZONE) CALHOUN (ZONE) IA 12/23/2009 10:00 CST-6 Ice Storm 0 0 500.00K 0.00K
GREENE (ZONE) GREENE (ZONE) IA 12/23/2009 10:00 CST-6 Ice Storm 0 0 1.000M 0.00K
POCAHONTAS (ZONE) POCAHONTAS (ZONE) IA 12/23/2009 10:00 CST-6 Ice Storm 0 0 500.00K 0.00K
CASS (ZONE) CASS (ZONE) IA 12/23/2009 10:00 CST-6 Ice Storm 0 0 500.00K 0.00K
BOONE (ZONE) BOONE (ZONE) IA 12/23/2009 16:00 CST-6 Ice Storm 0 0 500.00K 0.00K
WEBSTER (ZONE) WEBSTER (ZONE) IA 12/23/2009 16:00 CST-6 Ice Storm 0 0 1.000M 0.00K
WRIGHT (ZONE) WRIGHT (ZONE) IA 12/23/2009 16:00 CST-6 Ice Storm 0 0 500.00K 0.00K
DALLAS (ZONE) DALLAS (ZONE) IA 12/23/2009 16:00 CST-6 Ice Storm 0 0 500.00K 0.00K
HUMBOLDT (ZONE) HUMBOLDT (ZONE) IA 12/23/2009 16:00 CST-6 Ice Storm 0 0 500.00K 0.00K
HAMILTON (ZONE) HAMILTON (ZONE) IA 12/23/2009 16:00 CST-6 Ice Storm 0 0 500.00K 0.00K
FRANKLIN (ZONE) FRANKLIN (ZONE) IA 12/23/2009 16:00 CST-6 Ice Storm 0 0 500.00K 0.00K
CERRO GORDO (ZONE) CERRO GORDO (ZONE) IA 12/23/2009 16:00 CST-6 Ice Storm 0 0 500.00K 0.00K
Totals: 0 0 14.500M 0.00K