Storm Events Database

Event Details

Event Ice Storm
State IOWA
County/Area GRUNDY
WFO DMX
Report Source Trained Spotter
NCDC Data Source CSV
Begin Date 2010-01-20 06:00:00.0 CST-6
End Date 2010-01-20 13:30:00.0 CST-6
Deaths Direct/Indirect 0/0 (fatality details below, when available...)
Injuries Direct/Indirect 0/0
Property Damage 100.00K
Crop Damage 0.00K
Episode Narrative A strong push of warm air aloft took place over the central U.S. with 850 mb temperatures warming well above zero C over much of the state. During the day on the 19th a relatively strong high moved southeast to the east of Iowa. The easterly flow of cool air in the low levels established a strong inversion over the state. Surface temperatures fell into the teens and 20s in the cool easterly flow. A strong weather system from the southwest U.S. moved east across the southern half of the country during the night of the 19th into the daytime hours of the 20th. The low passed south of Iowa, however a strong push of warm and moist air moved into Iowa during the early morning of the 20th. A large area of freezing rain developed with embedded thunderstorms across southern Iowa during the early morning hours of the 20th. Thunderstorms produced moderate to heavy freezing rain and some small hail as they overspread the southern third of the state. The storms produced nickel size hail just south of Iowa shortly before sunrise. The area of freezing rain lifted north across Iowa through the morning hours. The event was not long lived, but did produce significant amounts of ice. The heaviest accumulation of ice occurred over the west central counties with Ida, Carroll, and Crawford Counties reporting three quarters to one inch of ice accrual. The ice of up to an inch thick extended as far east as Guthrie County and into a part of Adair County. The ice toppled large trees and knocked power out for thousands of customers. Wapello County also received three quarters of an inch of freezing rain as heavier thunderstorms moved through that area. Roads were ice covered and numerous schools and businesses closed due to the ice. Outside of the hardest hit areas, there were scattered reports of large tree branches being downed by the weight of the ice. Power outages numbered in the 50,000 to 60,000 customer range at the peak during the evening of the 20th. Thirty six hours after the event, over 40,000 customers remained without service. Due to the extensive damage, it was difficult to return service to some of the rural areas. Some of the rural areas were without power for several days to a week after the ice storm. There were still over 700 customers without power 9 days after the ice storm occurred. Most of the outages were in Sac and Carroll Counties. Freezing drizzle followed the main ice event. Though only very light additional accrual of ice took place, trees that were close to breaking continued to fall during the evening and resulted in the continued rise of power outages. On the 22nd, winds began to increase, resulting in additional damage. By mid afternoon on the 22nd, 60,000 customers were without power, and the counties of Sac, Carroll, Audubon, Calhoun, Cass, and Crawford had received a state disaster declaration. The ice storm broke approximately 2250 utility poles and knocked down nearly 1000 miles of power lines. Total damage to the Iowa Rural Electric Cooperatives alone was estimated at $35,000,000. One injury was reported in Sac County when a canopy at a gas station collapsed under the weight of the ice and fell on a woman. She was taken to the hospital for treatment. Her injuries were not life threatening.
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 1 13.400M 0.00K
CRAWFORD (ZONE) CRAWFORD (ZONE) IA 01/20/2010 01:00 CST-6 Ice Storm 0 0 2.000M 0.00K
ADAIR (ZONE) ADAIR (ZONE) IA 01/20/2010 01:00 CST-6 Ice Storm 0 0 200.00K 0.00K
CASS (ZONE) CASS (ZONE) IA 01/20/2010 01:00 CST-6 Ice Storm 0 0 750.00K 0.00K
DECATUR (ZONE) DECATUR (ZONE) IA 01/20/2010 01:00 CST-6 Ice Storm 0 0 75.00K 0.00K
RINGGOLD (ZONE) RINGGOLD (ZONE) IA 01/20/2010 01:00 CST-6 Ice Storm 0 0 75.00K 0.00K
TAYLOR (ZONE) TAYLOR (ZONE) IA 01/20/2010 01:00 CST-6 Ice Storm 0 0 75.00K 0.00K
ADAMS (ZONE) ADAMS (ZONE) IA 01/20/2010 01:00 CST-6 Ice Storm 0 0 100.00K 0.00K
WAYNE (ZONE) WAYNE (ZONE) IA 01/20/2010 01:00 CST-6 Ice Storm 0 0 75.00K 0.00K
CLARKE (ZONE) CLARKE (ZONE) IA 01/20/2010 01:00 CST-6 Ice Storm 0 0 100.00K 0.00K
MADISON (ZONE) MADISON (ZONE) IA 01/20/2010 01:00 CST-6 Ice Storm 0 0 100.00K 0.00K
AUDUBON (ZONE) AUDUBON (ZONE) IA 01/20/2010 01:00 CST-6 Ice Storm 0 0 1.000M 0.00K
UNION (ZONE) UNION (ZONE) IA 01/20/2010 01:00 CST-6 Ice Storm 0 0 100.00K 0.00K
LUCAS (ZONE) LUCAS (ZONE) IA 01/20/2010 03:00 CST-6 Ice Storm 0 0 100.00K 0.00K
MONROE (ZONE) MONROE (ZONE) IA 01/20/2010 03:00 CST-6 Ice Storm 0 0 100.00K 0.00K
POLK (ZONE) POLK (ZONE) IA 01/20/2010 03:00 CST-6 Ice Storm 0 0 300.00K 0.00K
DALLAS (ZONE) DALLAS (ZONE) IA 01/20/2010 03:00 CST-6 Ice Storm 0 0 150.00K 0.00K
WARREN (ZONE) WARREN (ZONE) IA 01/20/2010 03:00 CST-6 Ice Storm 0 0 150.00K 0.00K
MARION (ZONE) MARION (ZONE) IA 01/20/2010 03:00 CST-6 Ice Storm 0 0 100.00K 0.00K
GREENE (ZONE) GREENE (ZONE) IA 01/20/2010 03:00 CST-6 Ice Storm 0 0 150.00K 0.00K
GUTHRIE (ZONE) GUTHRIE (ZONE) IA 01/20/2010 03:00 CST-6 Ice Storm 0 0 250.00K 0.00K
DAVIS (ZONE) DAVIS (ZONE) IA 01/20/2010 03:00 CST-6 Ice Storm 0 0 100.00K 0.00K
SAC (ZONE) SAC (ZONE) IA 01/20/2010 03:00 CST-6 Ice Storm 0 1 2.500M 0.00K
APPANOOSE (ZONE) APPANOOSE (ZONE) IA 01/20/2010 03:00 CST-6 Ice Storm 0 0 100.00K 0.00K
CARROLL (ZONE) CARROLL (ZONE) IA 01/20/2010 03:00 CST-6 Ice Storm 0 0 2.000M 0.00K
CALHOUN (ZONE) CALHOUN (ZONE) IA 01/20/2010 03:00 CST-6 Ice Storm 0 0 750.00K 0.00K
GRUNDY (ZONE) GRUNDY (ZONE) IA 01/20/2010 06:00 CST-6 Ice Storm 0 0 100.00K 0.00K
JASPER (ZONE) JASPER (ZONE) IA 01/20/2010 06:00 CST-6 Ice Storm 0 0 100.00K 0.00K
BOONE (ZONE) BOONE (ZONE) IA 01/20/2010 06:00 CST-6 Ice Storm 0 0 100.00K 0.00K
TAMA (ZONE) TAMA (ZONE) IA 01/20/2010 06:00 CST-6 Ice Storm 0 0 100.00K 0.00K
WAPELLO (ZONE) WAPELLO (ZONE) IA 01/20/2010 06:00 CST-6 Ice Storm 0 0 200.00K 0.00K
HARDIN (ZONE) HARDIN (ZONE) IA 01/20/2010 06:00 CST-6 Ice Storm 0 0 100.00K 0.00K
STORY (ZONE) STORY (ZONE) IA 01/20/2010 06:00 CST-6 Ice Storm 0 0 100.00K 0.00K
POCAHONTAS (ZONE) POCAHONTAS (ZONE) IA 01/20/2010 06:00 CST-6 Ice Storm 0 0 100.00K 0.00K
HUMBOLDT (ZONE) HUMBOLDT (ZONE) IA 01/20/2010 06:00 CST-6 Ice Storm 0 0 100.00K 0.00K
MAHASKA (ZONE) MAHASKA (ZONE) IA 01/20/2010 06:00 CST-6 Ice Storm 0 0 250.00K 0.00K
POWESHIEK (ZONE) POWESHIEK (ZONE) IA 01/20/2010 06:00 CST-6 Ice Storm 0 0 100.00K 0.00K
WRIGHT (ZONE) WRIGHT (ZONE) IA 01/20/2010 06:00 CST-6 Ice Storm 0 0 100.00K 0.00K
WEBSTER (ZONE) WEBSTER (ZONE) IA 01/20/2010 06:00 CST-6 Ice Storm 0 0 100.00K 0.00K
HAMILTON (ZONE) HAMILTON (ZONE) IA 01/20/2010 06:00 CST-6 Ice Storm 0 0 100.00K 0.00K
MARSHALL (ZONE) MARSHALL (ZONE) IA 01/20/2010 06:00 CST-6 Ice Storm 0 0 100.00K 0.00K
FRANKLIN (ZONE) FRANKLIN (ZONE) IA 01/20/2010 07:00 CST-6 Ice Storm 0 0 50.00K 0.00K
EMMET (ZONE) EMMET (ZONE) IA 01/20/2010 07:00 CST-6 Ice Storm 0 0 50.00K 0.00K
HANCOCK (ZONE) HANCOCK (ZONE) IA 01/20/2010 07:00 CST-6 Ice Storm 0 0 50.00K 0.00K
PALO ALTO (ZONE) PALO ALTO (ZONE) IA 01/20/2010 07:00 CST-6 Ice Storm 0 0 50.00K 0.00K
KOSSUTH (ZONE) KOSSUTH (ZONE) IA 01/20/2010 07:00 CST-6 Ice Storm 0 0 50.00K 0.00K
Totals: 0 1 13.400M 0.00K