A strong upper level weather feature moved into the southwest U.S. as upper level ridge took place over the southeast U.S.  This placed Iowa in a strong southwest flow of air aloft.  At the surface, a shallow layer of Arctic air was in place with surface high pressure located over the north central U.S.  Deep moisture was drawn north into Iowa over the top of the Arctic Air at the surface with a deep layer of above freezing air flowing the top of the cold low level air.  Precipitatable water values rose to more than 2 times the normal for mid December.  A large area of freezing rain developed by the late evening hours over southern Iowa.  The rain spread northeast rather rapidly over much of the southeast half of the state during the early morning hours.  One quarter of an inch or more of ice accrual took place southeast of a Waterloo, Boone, to Atlantic line.  Ice accumulated to at least one half inch southeast of a Tama, Dallas Center to the southeast corner of Cass County.  The heaviest ice accumulations took place over south central Iowa from just south of Des Moines, southwest to Taylor County and east toward into Wapello and Davis Counties.  Snow fell along the north edge of the freezing rain area.  A band of 2 to 4 inch snow occurred over a large part of northern Iowa.  Numerous trees and power lines were downed from about Interstate 80 south.  Power outages were very numerous as well with Alliant Energy reporting 40,000 to 45,000 customers without power at one point, and MidAmerica Energy reporting nearly 30,000 out at one point.  Tree damage was described as incredible by one observer in Monroe County at Albia.  Damage was quite extensive over southern Iowa, especially from U.S. Highway 34 south, and up into Warren County.  The Des Moines International Airport was closed for a 6 hour period as a plane slid off the tarmac in the icy conditions.  No injuries were reported at the airport.  The ice caused $200,000 damage to the Southern Iowa Electrical Cooperative.  Due to the severity of the storm, Governor Chet Culver declared 23 southeast Iowa Counties disaster areas.

Ice Storm in STORY, IOWA
From 11-DEC-07 01:00:00 to 11-DEC-07 12:00:00 (CST-6)
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Ice Storm in HAMILTON, IOWA
From 11-DEC-07 01:00:00 to 11-DEC-07 12:00:00 (CST-6)
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Ice Storm in HARDIN, IOWA
From 11-DEC-07 01:00:00 to 11-DEC-07 12:00:00 (CST-6)
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Ice Storm in POWESHIEK, IOWA
From 11-DEC-07 01:00:00 to 11-DEC-07 13:00:00 (CST-6)
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Ice Storm in MARSHALL, IOWA
From 11-DEC-07 01:00:00 to 11-DEC-07 13:00:00 (CST-6)
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Ice Storm in TAMA, IOWA
From 11-DEC-07 01:00:00 to 11-DEC-07 13:00:00 (CST-6)
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Ice Storm in GRUNDY, IOWA
From 11-DEC-07 01:00:00 to 11-DEC-07 13:00:00 (CST-6)
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Ice Storm in BLACK HAWK, IOWA
From 11-DEC-07 01:00:00 to 11-DEC-07 13:00:00 (CST-6)
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Ice Storm in TAYLOR, IOWA
From 10-DEC-07 22:00:00 to 11-DEC-07 12:00:00 (CST-6)
Property damage: 100.00K
Crop damage: 0.00K
Reported by: COOP Observer

Ice Storm in RINGGOLD, IOWA
From 10-DEC-07 22:00:00 to 11-DEC-07 12:00:00 (CST-6)
Property damage: 100.00K
Crop damage: 0.00K
Reported by: COOP Observer

Three quarters of an inch of ice accumulation in Beaconsfield.

Ice Storm in ADAMS, IOWA
From 10-DEC-07 22:00:00 to 11-DEC-07 12:00:00 (CST-6)
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Ice Storm in UNION, IOWA
From 10-DEC-07 22:00:00 to 11-DEC-07 12:00:00 (CST-6)
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Ice Storm in CASS, IOWA
From 10-DEC-07 22:00:00 to 11-DEC-07 12:00:00 (CST-6)
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Ice Storm in ADAIR, IOWA
From 10-DEC-07 22:00:00 to 11-DEC-07 12:00:00 (CST-6)
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Ice Storm in MADISON, IOWA
From 10-DEC-07 22:00:00 to 11-DEC-07 12:00:00 (CST-6)
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Ice Storm in GUTHRIE, IOWA
From 10-DEC-07 22:00:00 to 11-DEC-07 12:00:00 (CST-6)
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Ice Storm in DECATUR, IOWA
From 10-DEC-07 22:00:00 to 11-DEC-07 13:00:00 (CST-6)
Property damage: 150.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Ice Storm in WAYNE, IOWA
From 10-DEC-07 22:00:00 to 11-DEC-07 13:00:00 (CST-6)
Property damage: 150.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Ice Storm in CLARKE, IOWA
From 10-DEC-07 22:00:00 to 11-DEC-07 13:00:00 (CST-6)
Property damage: 150.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Ice Storm in LUCAS, IOWA
From 10-DEC-07 22:00:00 to 11-DEC-07 13:00:00 (CST-6)
Property damage: 150.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Ice Storm in APPANOOSE, IOWA
From 11-DEC-07 00:00:00 to 11-DEC-07 14:00:00 (CST-6)
Property damage: 150.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported 1 inch of ice accrual.

Ice Storm in DAVIS, IOWA
From 11-DEC-07 00:00:00 to 11-DEC-07 14:00:00 (CST-6)
Property damage: 150.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The County Sheriffs office reported a 1 inch accrual of ice.

Ice Storm in MONROE, IOWA
From 11-DEC-07 00:00:00 to 11-DEC-07 14:00:00 (CST-6)
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Ice Storm in WAPELLO, IOWA
From 11-DEC-07 00:00:00 to 11-DEC-07 14:00:00 (CST-6)
Property damage: 150.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The County Sheriffs Office reported a 1 inch accrual of ice.

Ice Storm in WARREN, IOWA
From 11-DEC-07 00:00:00 to 11-DEC-07 13:00:00 (CST-6)
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Ice Storm in MARION, IOWA
From 11-DEC-07 00:00:00 to 11-DEC-07 13:00:00 (CST-6)
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Ice Storm in MAHASKA, IOWA
From 11-DEC-07 00:00:00 to 11-DEC-07 13:00:00 (CST-6)
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Ice Storm in JASPER, IOWA
From 11-DEC-07 00:00:00 to 11-DEC-07 13:00:00 (CST-6)
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Ice Storm in DALLAS, IOWA
From 11-DEC-07 00:00:00 to 11-DEC-07 12:00:00 (CST-6)
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Ice Storm in POLK, IOWA
From 11-DEC-07 00:00:00 to 11-DEC-07 12:00:00 (CST-6)
Property damage: 150.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Ice Storm in GREENE, IOWA
From 11-DEC-07 00:00:00 to 11-DEC-07 12:00:00 (CST-6)
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Ice Storm in BOONE, IOWA
From 11-DEC-07 00:00:00 to 11-DEC-07 12:00:00 (CST-6)
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Trained Spotter