Storm Events Database

Event Details

Event Blizzard
State IOWA
County/Area SAC
WFO DMX
Begin Date 12/20/2008 12:00:00 CST-6
End Date 12/21/2008 17:00:00 CST-6
Deaths Direct/Indirect 0/0 (fatality details below, when available...)
Injuries Direct/Indirect 0/0
Property Damage 0.00K
Crop Damage 0.00K
Episode Narrative An inverted trough of low pressure at the surface moved through the state during the early morning of the 20th into the day on the 20th. At the same time, a strong low pressure deepened in the upper atmosphere over and just northeast of the state. The combination drew down Arctic air into the central U.S. A tight pressure gradient developed between the developing low to the east and Arctic high pressure to the northwest. Winds increased on the 20th, and continued through most of the day on the 21st. Sustained wind speeds were in the 25 to 35 MPH range, with gusts of 40 to 50 MPH. Very little snow fell with the inverted trough, generally an inch or two, however antecedent snow cover was quite high with 7 to 12 inches common. The winds caused whiteout conditions for an extended period of time as the snow that was loose blew in open areas. Much of the deeper snow had crusted over, so blizzard conditions were somewhat sporadic and not as widespread as would normally be expected. The first and second order reporting stations did not meet blizzard criteria outside of occasionally, however law enforcement officials reported visibility frequently reduced to between 10 and 100 feet in open areas. Travel was therefore not recommended across all of the northern part of Iowa north of U.S. Highway 30. Roads drifted shut quickly and snowplows were taken off of several roads during the height of the storm. In addition to the wind, temperatures fell below zero, resulting in dangerous wind chill indices in the -30 to -40 F. range.
Event Narrative


All events for this episode:

Location County/Zone St. Date Time T.Z. Type Mag Dth Inj PrD CrD
Totals: 0 0 0.00K 0.00K
KOSSUTH (ZONE) KOSSUTH (ZONE) IA 12/20/2008 12:00 CST-6 Blizzard 0 0 0.00K 0.00K
WRIGHT (ZONE) WRIGHT (ZONE) IA 12/20/2008 12:00 CST-6 Blizzard 0 0 0.00K 0.00K
CALHOUN (ZONE) CALHOUN (ZONE) IA 12/20/2008 12:00 CST-6 Blizzard 0 0 0.00K 0.00K
SAC (ZONE) SAC (ZONE) IA 12/20/2008 12:00 CST-6 Blizzard 0 0 0.00K 0.00K
WINNEBAGO (ZONE) WINNEBAGO (ZONE) IA 12/20/2008 12:00 CST-6 Blizzard 0 0 0.00K 0.00K
POCAHONTAS (ZONE) POCAHONTAS (ZONE) IA 12/20/2008 12:00 CST-6 Blizzard 0 0 0.00K 0.00K
EMMET (ZONE) EMMET (ZONE) IA 12/20/2008 12:00 CST-6 Blizzard 0 0 0.00K 0.00K
HANCOCK (ZONE) HANCOCK (ZONE) IA 12/20/2008 12:00 CST-6 Blizzard 0 0 0.00K 0.00K
PALO ALTO (ZONE) PALO ALTO (ZONE) IA 12/20/2008 12:00 CST-6 Blizzard 0 0 0.00K 0.00K
WEBSTER (ZONE) WEBSTER (ZONE) IA 12/20/2008 12:00 CST-6 Blizzard 0 0 0.00K 0.00K
HUMBOLDT (ZONE) HUMBOLDT (ZONE) IA 12/20/2008 12:00 CST-6 Blizzard 0 0 0.00K 0.00K
HAMILTON (ZONE) HAMILTON (ZONE) IA 12/20/2008 12:00 CST-6 Blizzard 0 0 0.00K 0.00K
BUTLER (ZONE) BUTLER (ZONE) IA 12/20/2008 14:00 CST-6 Blizzard 0 0 0.00K 0.00K
WORTH (ZONE) WORTH (ZONE) IA 12/20/2008 14:00 CST-6 Blizzard 0 0 0.00K 0.00K
CERRO GORDO (ZONE) CERRO GORDO (ZONE) IA 12/20/2008 14:00 CST-6 Blizzard 0 0 0.00K 0.00K
FRANKLIN (ZONE) FRANKLIN (ZONE) IA 12/20/2008 14:00 CST-6 Blizzard 0 0 0.00K 0.00K
BREMER (ZONE) BREMER (ZONE) IA 12/20/2008 14:00 CST-6 Blizzard 0 0 0.00K 0.00K
GRUNDY (ZONE) GRUNDY (ZONE) IA 12/20/2008 14:00 CST-6 Blizzard 0 0 0.00K 0.00K
BLACK HAWK (ZONE) BLACK HAWK (ZONE) IA 12/20/2008 14:00 CST-6 Blizzard 0 0 0.00K 0.00K
HARDIN (ZONE) HARDIN (ZONE) IA 12/20/2008 14:00 CST-6 Blizzard 0 0 0.00K 0.00K
Totals: 0 0 0.00K 0.00K