Storm Events Database

Event Details

Event Heavy Snow
State IOWA
County/Area PALO ALTO
WFO DMX
Report Source Trained Spotter
NCDC Data Source CSV
Begin Date 2012-01-20 03:00:00.0 CST-6
End Date 2012-01-20 14:30:00.0 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 A weak inverted trough passed over the state during the day on the 20th. Though the system was weak at the surface, the dynamics aloft were significant. A strong upper level system moved across the Rockies into the central U.S. during the day. Ahead of this feature, strong isentropic lift was in place. In spite of the cold air at the surface, there was significant lift and moisture available in the 850 mb to 700 mb layer to produce precipitation. Snow developed quite rapidly during the predawn hours of the 20th over western Iowa. The snow spread east very quickly and in many cases became heavy within a few hours of inception. Visibility was reduced to 1/4 to 1/2 mile during the heaviest snow with snowfall rates reaching 1 to 2 inches per hour in places. Fortunately, there was little wind with this event. Outside of drifting in open area, the snow caused relatively little trouble in spite of the band of 6 to 8 inch snowfall that occurred. The snow band was 75 to 100 miles wide with the heaviest snow falling from near Estherville in the northwest, east-southeast to the Waterloo area. Higher snowfall totals include 8 inches in Emmet County at Ringsted, and 7 inches in the Waterloo and Cedar Falls areas of Black Hawk County. In Worth County, 7 inches was also measured in Manly.
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 0 0.00K 0.00K
WRIGHT (ZONE) WRIGHT (ZONE) IA 01/20/2012 03:00 CST-6 Heavy Snow 0 0 0.00K 0.00K
KOSSUTH (ZONE) KOSSUTH (ZONE) IA 01/20/2012 03:00 CST-6 Heavy Snow 0 0 0.00K 0.00K
PALO ALTO (ZONE) PALO ALTO (ZONE) IA 01/20/2012 03:00 CST-6 Heavy Snow 0 0 0.00K 0.00K
WINNEBAGO (ZONE) WINNEBAGO (ZONE) IA 01/20/2012 03:00 CST-6 Heavy Snow 0 0 0.00K 0.00K
HUMBOLDT (ZONE) HUMBOLDT (ZONE) IA 01/20/2012 03:00 CST-6 Heavy Snow 0 0 0.00K 0.00K
POCAHONTAS (ZONE) POCAHONTAS (ZONE) IA 01/20/2012 03:00 CST-6 Heavy Snow 0 0 0.00K 0.00K
HANCOCK (ZONE) HANCOCK (ZONE) IA 01/20/2012 03:00 CST-6 Heavy Snow 0 0 0.00K 0.00K
EMMET (ZONE) EMMET (ZONE) IA 01/20/2012 03:00 CST-6 Heavy Snow 0 0 0.00K 0.00K
BLACK HAWK (ZONE) BLACK HAWK (ZONE) IA 01/20/2012 06:00 CST-6 Heavy Snow 0 0 0.00K 0.00K
BUTLER (ZONE) BUTLER (ZONE) IA 01/20/2012 06:00 CST-6 Heavy Snow 0 0 0.00K 0.00K
CERRO GORDO (ZONE) CERRO GORDO (ZONE) IA 01/20/2012 06:00 CST-6 Heavy Snow 0 0 0.00K 0.00K
TAMA (ZONE) TAMA (ZONE) IA 01/20/2012 06:00 CST-6 Heavy Snow 0 0 0.00K 0.00K
HARDIN (ZONE) HARDIN (ZONE) IA 01/20/2012 06:00 CST-6 Heavy Snow 0 0 0.00K 0.00K
BREMER (ZONE) BREMER (ZONE) IA 01/20/2012 06:00 CST-6 Heavy Snow 0 0 0.00K 0.00K
WORTH (ZONE) WORTH (ZONE) IA 01/20/2012 06:00 CST-6 Heavy Snow 0 0 0.00K 0.00K
GRUNDY (ZONE) GRUNDY (ZONE) IA 01/20/2012 06:00 CST-6 Heavy Snow 0 0 0.00K 0.00K
FRANKLIN (ZONE) FRANKLIN (ZONE) IA 01/20/2012 06:00 CST-6 Heavy Snow 0 0 0.00K 0.00K
Totals: 0 0 0.00K 0.00K