The seasons first major winter storm moved into Iowa on the 1st.  The system developed in the east Pacific off the California and Mexico coasts and lifted northeast into the central U.S.  A very strong push of warm air moved into the central U.S. ahead of the storm.  Prior to the storms arrival, polar air was in place with temperatures in the teens and 20s and dew points in the single digits above and below zero.  Precipitation moved into the area during the predawn hours on the 1st.  Initially the precipitation fell as snow, but with the intense warm air advection it turned to freezing rain and sleet very quickly over southern Iowa, and within a few hours after inception over the north.  Surface temperatures were slow to warm due to evaporative cooling. In spite of winds in the low levels between 900 and 800 mb being in the 70 plus knot range, surface temperatures warmed very slowly.  Eventually, the surface low pressure system lifted northeast through west central into northeast Iowa resulting in temperatures rising above freezing in most areas.  Freezing rain was widespread over much of the south two thirds of iowa.  Widespread ice accretions of at least one quarter of an inch of ice were reported.  Heavier icing occurred southwest of Des Moines in Adair and Madison Counties with widespread ice accumulations of up to three quarters of an inch.  One half to three quarter inch ice accumulations were common across the south tier of counties from Interstate 35, east.  The ice resulted in some tree and power line damage with scattered power outages reported.  Southeast winds of 20 to 35 MPH caused branches to break, knocking out power for thousands of customers by the afternoon of the 1st.  Ice and ice pellets produced very slippery runway conditions at the Des Moines International airport.  One plane slid off the tarmac, resulting in a 7 hour closure of the airport.  The secondary problem that took place over nearly all of Iowa was heavy ice pellet accumulations.  Many areas reported one half to 1 inch of sleet accumulation, resulting in considerable travel difficulties.  Over the northern part of the state, roughly from U.S. Highway 20 north, one to three inches of snow fell, with spotty amounts of up to 4 inches.  In addition to the snow, sleet was reported for several hours during the afternoon with accumulations of up to one half inch.  Freezing rain did occur as well, but the freezing rain was not all that extensive or heavy.

Winter Storm in WEBSTER, IOWA
From 01-DEC-07 08:00:00 to 01-DEC-07 19:00:00 (CST-6)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Winter Storm in HAMILTON, IOWA
From 01-DEC-07 08:00:00 to 01-DEC-07 19:00:00 (CST-6)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Winter Storm in POCAHONTAS, IOWA
From 01-DEC-07 08:00:00 to 01-DEC-07 19:00:00 (CST-6)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Winter Storm in HUMBOLDT, IOWA
From 01-DEC-07 08:00:00 to 01-DEC-07 19:00:00 (CST-6)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Winter Storm in WRIGHT, IOWA
From 01-DEC-07 08:00:00 to 01-DEC-07 19:00:00 (CST-6)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Winter Storm in BREMER, IOWA
From 01-DEC-07 08:00:00 to 01-DEC-07 19:00:00 (CST-6)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Winter Storm in BLACK HAWK, IOWA
From 01-DEC-07 08:00:00 to 01-DEC-07 19:00:00 (CST-6)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Winter Storm in PALO ALTO, IOWA
From 01-DEC-07 08:00:00 to 01-DEC-07 19:00:00 (CST-6)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Winter Storm in KOSSUTH, IOWA
From 01-DEC-07 08:00:00 to 01-DEC-07 19:00:00 (CST-6)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Winter Storm in HANCOCK, IOWA
From 01-DEC-07 08:00:00 to 01-DEC-07 19:00:00 (CST-6)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Winter Storm in CERRO GORDO, IOWA
From 01-DEC-07 08:00:00 to 01-DEC-07 19:00:00 (CST-6)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Winter Storm in EMMET, IOWA
From 01-DEC-07 08:00:00 to 01-DEC-07 19:00:00 (CST-6)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Winter Storm in WINNEBAGO, IOWA
From 01-DEC-07 08:00:00 to 01-DEC-07 19:00:00 (CST-6)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Winter Storm in WORTH, IOWA
From 01-DEC-07 08:00:00 to 01-DEC-07 19:00:00 (CST-6)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Winter Storm in SAC, IOWA
From 01-DEC-07 08:00:00 to 01-DEC-07 19:00:00 (CST-6)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Ice Storm in MARION, IOWA
From 01-DEC-07 06:00:00 to 01-DEC-07 14:00:00 (CST-6)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Ice Storm in AUDUBON, IOWA
From 01-DEC-07 06:00:00 to 01-DEC-07 14:00:00 (CST-6)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Ice Storm in GUTHRIE, IOWA
From 01-DEC-07 06:00:00 to 01-DEC-07 14:00:00 (CST-6)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Ice Storm in DALLAS, IOWA
From 01-DEC-07 06:00:00 to 01-DEC-07 14:00:00 (CST-6)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Ice Storm in POLK, IOWA
From 01-DEC-07 06:00:00 to 01-DEC-07 14:00:00 (CST-6)
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Ice Storm in JASPER, IOWA
From 01-DEC-07 06:00:00 to 01-DEC-07 14:00:00 (CST-6)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Ice Storm in POWESHIEK, IOWA
From 01-DEC-07 06:00:00 to 01-DEC-07 14:00:00 (CST-6)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Ice Storm in CRAWFORD, IOWA
From 01-DEC-07 06:00:00 to 01-DEC-07 18:00:00 (CST-6)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Ice Storm in CARROLL, IOWA
From 01-DEC-07 06:00:00 to 01-DEC-07 18:00:00 (CST-6)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Ice Storm in GREENE, IOWA
From 01-DEC-07 07:00:00 to 01-DEC-07 18:00:00 (CST-6)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Ice Storm in BOONE, IOWA
From 01-DEC-07 07:00:00 to 01-DEC-07 18:00:00 (CST-6)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Ice Storm in STORY, IOWA
From 01-DEC-07 07:00:00 to 01-DEC-07 18:00:00 (CST-6)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Ice Storm in MARSHALL, IOWA
From 01-DEC-07 07:00:00 to 01-DEC-07 18:00:00 (CST-6)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Ice Storm in TAMA, IOWA
From 01-DEC-07 07:00:00 to 01-DEC-07 18:00:00 (CST-6)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Ice Storm in HARDIN, IOWA
From 01-DEC-07 08:00:00 to 01-DEC-07 19:00:00 (CST-6)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Ice Storm in GRUNDY, IOWA
From 01-DEC-07 08:00:00 to 01-DEC-07 19:00:00 (CST-6)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Ice Storm in FRANKLIN, IOWA
From 01-DEC-07 08:00:00 to 01-DEC-07 19:00:00 (CST-6)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Ice Storm in BUTLER, IOWA
From 01-DEC-07 08:00:00 to 01-DEC-07 19:00:00 (CST-6)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Winter Storm in CALHOUN, IOWA
From 01-DEC-07 08:00:00 to 01-DEC-07 19:00:00 (CST-6)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Ice Storm in TAYLOR, IOWA
From 01-DEC-07 05:00:00 to 01-DEC-07 14:00:00 (CST-6)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Ice Storm in RINGGOLD, IOWA
From 01-DEC-07 05:00:00 to 01-DEC-07 14:00:00 (CST-6)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Ice Storm in DECATUR, IOWA
From 01-DEC-07 05:00:00 to 01-DEC-07 14:00:00 (CST-6)
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Ice Storm in WAYNE, IOWA
From 01-DEC-07 06:00:00 to 01-DEC-07 14:00:00 (CST-6)
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Ice Storm in APPANOOSE, IOWA
From 01-DEC-07 06:00:00 to 01-DEC-07 14:00:00 (CST-6)
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Ice Storm in DAVIS, IOWA
From 01-DEC-07 06:30:00 to 01-DEC-07 14:00:00 (CST-6)
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Ice Storm in UNION, IOWA
From 01-DEC-07 06:00:00 to 01-DEC-07 14:00:00 (CST-6)
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Ice Storm in CLARKE, IOWA
From 01-DEC-07 06:00:00 to 01-DEC-07 14:00:00 (CST-6)
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Ice Storm in LUCAS, IOWA
From 01-DEC-07 06:00:00 to 01-DEC-07 14:00:00 (CST-6)
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Ice Storm in MONROE, IOWA
From 01-DEC-07 06:00:00 to 01-DEC-07 14:00:00 (CST-6)
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Ice Storm in WAPELLO, IOWA
From 01-DEC-07 06:00:00 to 01-DEC-07 14:00:00 (CST-6)
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Ice Storm in CASS, IOWA
From 01-DEC-07 06:00:00 to 01-DEC-07 14:00:00 (CST-6)
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Ice Storm in ADAIR, IOWA
From 01-DEC-07 06:00:00 to 01-DEC-07 14:00:00 (CST-6)
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Ice Storm in MADISON, IOWA
From 01-DEC-07 06:00:00 to 01-DEC-07 14:00:00 (CST-6)
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Ice Storm in WARREN, IOWA
From 01-DEC-07 06:00:00 to 01-DEC-07 14:00:00 (CST-6)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement