Storm Events Database

Event Details

Event Winter Storm
State IOWA
County/Area SAC
WFO DMX
Begin Date 12/18/2008 21:30:00 CST-6
End Date 12/19/2008 08:00:00 CST-6
Deaths Direct/Indirect 0/0 (fatality details below, when available...)
Injuries Direct/Indirect 0/0
Property Damage 5.00K
Crop Damage 0.00K
Episode Narrative A strong trough of low pressure in the upper atmosphere moved into the southwest U.S. late on the 17th and early on the 18th. The system was very fast moving with a strong jet of 165 kts streaming up the east side of the trough. A short wave ejected out of the trough and raced northeast through the central U.S., reaching Illinois by the morning of the 19th. Low pressure at the surface formed over western Kansas during the afternoon of the 18th. It moved to northeast Kansas by evening, and to near Burlington, IA by sunrise on the 19th. A strong low level jet pushed moisture over a polar airmass that was in place over Iowa. In addition, the atmosphere became quite unstable for December over the state, resulting in the development of thunderstorms over a large part of Iowa during the overnight hours of the 18th into the 19th. A variety of weather conditions developed over the northern two thirds of the state. Thunder with snow and ice pellets was commonly reported, and resulted in some heavy amounts of each. Over the central part of the state, ice pellets were predominant along the Interstate 80 corridor, with mostly snow falling north of U.S. Highway 30. Over the central sections, many areas reported ice pellet accumulations in excess of an inch. The heaviest amount was around 3 inches in Dallas County south of Perry. One and one half to two inches was common across the Metropolitan Des Moines area as well. Most other areas along the I-80 corridor were in the three quarters to one inch range. Snowfall amounts increased rapidly as you headed north with six inch or greater snowfall amounts common from near U.S. Highway 30 north. Seven to eight inch snow amounts were very common in a 50 mile wide band stretching east-west along the U.S. Highway 20 corridor. There were two areas of heavier snow. Over 10 inches of snow fell in Pocahontas County as thunderstorms moved through the area. Another pocket of heavy snow was over the northeast part of the CWA. The greatest amount fell in Butler County at Aplington, with 13.4 inches. In Bremer County, 10 inches was reported in Plainfield, with 9.7 inches in Denver. Roads became icy and snow packed, and by the early morning hours, travel was not recommended north of U.S. Highway 30. Though damage was not all that great, the storm did cause considerable disruption. Nearly all schools were closed on the 19th, and most other activities were canceled or delayed. The heavy ice pellet accumulation caused the closing of the Des Moines Airport for a period, canceling several flights and causing numerous delays.
Event Narrative


All events for this episode:

Location County/Zone St. Date Time T.Z. Type Mag Dth Inj PrD CrD
Totals: 0 0 215.00K 0.00K
JASPER (ZONE) JASPER (ZONE) IA 12/18/2008 19:00 CST-6 Winter Storm 0 0 15.00K 0.00K
GREENE (ZONE) GREENE (ZONE) IA 12/18/2008 19:00 CST-6 Winter Storm 0 0 5.00K 0.00K
AUDUBON (ZONE) AUDUBON (ZONE) IA 12/18/2008 19:00 CST-6 Winter Storm 0 0 5.00K 0.00K
WARREN (ZONE) WARREN (ZONE) IA 12/18/2008 19:00 CST-6 Winter Storm 0 0 5.00K 0.00K
GUTHRIE (ZONE) GUTHRIE (ZONE) IA 12/18/2008 19:00 CST-6 Winter Storm 0 0 5.00K 0.00K
TAMA (ZONE) TAMA (ZONE) IA 12/18/2008 19:00 CST-6 Winter Storm 0 0 5.00K 0.00K
POWESHIEK (ZONE) POWESHIEK (ZONE) IA 12/18/2008 19:00 CST-6 Winter Storm 0 0 5.00K 0.00K
DALLAS (ZONE) DALLAS (ZONE) IA 12/18/2008 19:00 CST-6 Winter Storm 0 0 5.00K 0.00K
POLK (ZONE) POLK (ZONE) IA 12/18/2008 19:00 CST-6 Winter Storm 0 0 20.00K 0.00K
MARION (ZONE) MARION (ZONE) IA 12/18/2008 19:00 CST-6 Winter Storm 0 0 20.00K 0.00K
MARSHALL (ZONE) MARSHALL (ZONE) IA 12/18/2008 20:00 CST-6 Winter Storm 0 0 5.00K 0.00K
STORY (ZONE) STORY (ZONE) IA 12/18/2008 20:00 CST-6 Winter Storm 0 0 5.00K 0.00K
BOONE (ZONE) BOONE (ZONE) IA 12/18/2008 20:00 CST-6 Winter Storm 0 0 5.00K 0.00K
CARROLL (ZONE) CARROLL (ZONE) IA 12/18/2008 20:00 CST-6 Winter Storm 0 0 5.00K 0.00K
CRAWFORD (ZONE) CRAWFORD (ZONE) IA 12/18/2008 20:00 CST-6 Winter Storm 0 0 5.00K 0.00K
SAC (ZONE) SAC (ZONE) IA 12/18/2008 21:30 CST-6 Winter Storm 0 0 5.00K 0.00K
FRANKLIN (ZONE) FRANKLIN (ZONE) IA 12/18/2008 21:30 CST-6 Winter Storm 0 0 5.00K 0.00K
WRIGHT (ZONE) WRIGHT (ZONE) IA 12/18/2008 21:30 CST-6 Winter Storm 0 0 5.00K 0.00K
HUMBOLDT (ZONE) HUMBOLDT (ZONE) IA 12/18/2008 21:30 CST-6 Winter Storm 0 0 5.00K 0.00K
GRUNDY (ZONE) GRUNDY (ZONE) IA 12/18/2008 21:30 CST-6 Winter Storm 0 0 5.00K 0.00K
PALO ALTO (ZONE) PALO ALTO (ZONE) IA 12/18/2008 21:30 CST-6 Winter Storm 0 0 5.00K 0.00K
BUTLER (ZONE) BUTLER (ZONE) IA 12/18/2008 21:30 CST-6 Winter Storm 0 0 5.00K 0.00K
BREMER (ZONE) BREMER (ZONE) IA 12/18/2008 21:30 CST-6 Winter Storm 0 0 5.00K 0.00K
KOSSUTH (ZONE) KOSSUTH (ZONE) IA 12/18/2008 21:30 CST-6 Winter Storm 0 0 5.00K 0.00K
CERRO GORDO (ZONE) CERRO GORDO (ZONE) IA 12/18/2008 21:30 CST-6 Winter Storm 0 0 5.00K 0.00K
HANCOCK (ZONE) HANCOCK (ZONE) IA 12/18/2008 21:30 CST-6 Winter Storm 0 0 5.00K 0.00K
EMMET (ZONE) EMMET (ZONE) IA 12/18/2008 21:30 CST-6 Winter Storm 0 0 5.00K 0.00K
WINNEBAGO (ZONE) WINNEBAGO (ZONE) IA 12/18/2008 21:30 CST-6 Winter Storm 0 0 5.00K 0.00K
WORTH (ZONE) WORTH (ZONE) IA 12/18/2008 21:30 CST-6 Winter Storm 0 0 5.00K 0.00K
BLACK HAWK (ZONE) BLACK HAWK (ZONE) IA 12/18/2008 21:30 CST-6 Winter Storm 0 0 5.00K 0.00K
CALHOUN (ZONE) CALHOUN (ZONE) IA 12/18/2008 21:30 CST-6 Winter Storm 0 0 5.00K 0.00K
WEBSTER (ZONE) WEBSTER (ZONE) IA 12/18/2008 21:30 CST-6 Winter Storm 0 0 5.00K 0.00K
POCAHONTAS (ZONE) POCAHONTAS (ZONE) IA 12/18/2008 21:30 CST-6 Winter Storm 0 0 5.00K 0.00K
HARDIN (ZONE) HARDIN (ZONE) IA 12/18/2008 21:30 CST-6 Winter Storm 0 0 5.00K 0.00K
HAMILTON (ZONE) HAMILTON (ZONE) IA 12/18/2008 21:30 CST-6 Winter Storm 0 0 5.00K 0.00K
Totals: 0 0 215.00K 0.00K