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Storm Events Database
|Report Source||COOP Observer|
|NCDC Data Source||CSV|
|Begin Date||2007-12-01 12:00:00.0 CST-6|
|End Date||2007-12-02 03:00:00.0 CST-6|
|Deaths Direct/Indirect||0/0 (fatality details below, when available...)|
|Episode Narrative||The first major winter storm of the 2007-08 winter season affected all of south-central and southeast Wisconsin with a mix of snow, sleet, and freezing rain. The precipitation started off as snow (occasionally moderate to heavy) in the morning with accumulations eventually reaching around 2 inches near the Illinois border from Rock to Kenosha County, to 3 to 6 inches in the Madison to Milwaukee area, to 6 to 8 inches from Marquette County to Sheboygan County. Some thundersnow was reported. It then changed to sleet and then freezing rain from south to north across the area during the afternoon hours, and then freezing drizzle or light rain during the overnight hours. Ice accumulations ranged from 1/4 to 1/2 inch basically south of a line from Dodgeville to Madison to Milwaukee with the greatest amounts near the Illinois border.
A multi-vehicle accident on Interstate 90/94/39 near DeForest in northern Dane County resulted in one indirectly-related fatality. Another vehicle accident in the Town of Caledonia on STH 33 in Columbia County resulted in three indirectly-related fatalities. Otherwise, hundreds of spin-outs and accidents occurred across south-central and southeast Wisconsin. Ice-covered tree branches broke and fell on power-lines due to southeast winds gusting to 30 to 39 knots (35 to 45 mph). As a result, scattered power outages occurred, and 12000 customers in south-central and southeast Wisconsin were without power for at least several hours. Dozens of airline flights at the Madison and Milwaukee airports were canceled. Hundreds of civic functions were canceled.
Specific snow and sleet accumulations include 8 at Howards Grove, 7 at West Bend, 6 to 6.5 inches in northern Marquette County, 6.2 inches at Madison Truax Field, 6 at Berlin, Lodi, Reedsburg, and Ashford (Fond du Lac Co.), 5.3 at Blanchardville, 5.1 at the NWS office southeast of Sullivan, 5 at Monroe, La Grange, Avoca, and far northwestern Ozaukee County, 4.9 inches at Brookfield, 4.5 at Brown Deer, 4 at Janesville, 3.5 inches at Milwaukee Mitchell Field and Waterford, and 2.2 at Paddock Lake.
Synoptically, a strong low-level jet of 60-70 knots pulled warm, moist air over colder air found at the surface resulting in a series of convective, moderate to heavy snow showers moving north through southern Wisconsin. A strong upstairs short-wave trough aided in vertical motion as the surface low pressure moved from the central plains northeast through southern Wisconsin.
Ultimately, many locations in the south-central and southeast counties of Wisconsin would have total snowfalls of 25 to 36 for the month of December, 2007. Normal snowfall for a December is 8 to 14. The image shown in this winter storm event depicts the snow amounts for December, 2007.
All events for this episode:
|RACINE (ZONE)||RACINE (ZONE)||WI||12/01/2007||12:00||CST-6||Winter Storm||0||0||0.00K||0.00K|
|MILWAUKEE (ZONE)||MILWAUKEE (ZONE)||WI||12/01/2007||12:00||CST-6||Winter Storm||0||0||0.00K||0.00K|
|KENOSHA (ZONE)||KENOSHA (ZONE)||WI||12/01/2007||12:00||CST-6||Winter Storm||0||0||0.00K||0.00K|
|FOND DU LAC (ZONE)||FOND DU LAC (ZONE)||WI||12/01/2007||12:00||CST-6||Winter Storm||0||0||0.00K||0.00K|
|WASHINGTON (ZONE)||WASHINGTON (ZONE)||WI||12/01/2007||12:00||CST-6||Winter Storm||0||0||0.00K||0.00K|
|SHEBOYGAN (ZONE)||SHEBOYGAN (ZONE)||WI||12/01/2007||12:00||CST-6||Winter Storm||0||0||0.00K||0.00K|
|OZAUKEE (ZONE)||OZAUKEE (ZONE)||WI||12/01/2007||12:00||CST-6||Winter Storm||0||0||0.00K||0.00K|