A long-duration light snow event affected South-central and Southeast Wisconsin from Jan 12 into early Jan 13th.  It began in the late morning west of Madison, and in the mid to late afternoon toward Lake Michigan.  Snow to liquid ratios of 13:1 acted on 0.3 to 0.4 inch of liquid to produce widespread 4 to 6 inch snow totals.  The snow was generated by a closed 500 mb low that strengthened as it moved over Illinois and became negatively tilted as it crossed Indiana into Ohio and interacted with an open short-wave trough that dropped southeast into Wisconsin during the day on January 12th.  Moisture wrapping into the southern closed low was pulled up over southern Wisconsin ahead of the short wave trough and into an inverted trough of surface low pressure that extended back to the northwest from the main surface low on the Indiana/Ohio border.  The development of a secondary area of surface low pressure over Lower Michigan produced an area of low-level convergence across eastern sections of Southeast Wisconsin that kept the snow going from the late evening until after midnight. This added to snow totals in portions of Sheboygan...Fond Du Lac...Washington and Dodge counties, as well as Waukesha...Milwaukee...Racine and Kenosha counties, bringing total accumulations of 6.5 inches to 8 inches in these counties.  The greatest total was 8.1 inches in the city of Kenosha.  There were some spin-outs and vehicle accidents with a few minor injuries reported across southern Wisconsin.  Because of the long-duration of snowfall, road crews were able to keep roads clear and minimize the impact on society.  Therefore, this event was not classified as a winter storm event.

Winter Weather in DODGE, WISCONSIN
From 12-JAN-12 06:00:00 to 13-JAN-12 03:00:00 (CST-6)
Reported by: COOP Observer

Winter Weather in WASHINGTON, WISCONSIN
From 12-JAN-12 06:00:00 to 13-JAN-12 03:00:00 (CST-6)
Reported by: COOP Observer

Winter Weather in OZAUKEE, WISCONSIN
From 12-JAN-12 06:00:00 to 13-JAN-12 03:00:00 (CST-6)
Reported by: COOP Observer

Winter Weather in IOWA, WISCONSIN
From 12-JAN-12 06:00:00 to 13-JAN-12 03:00:00 (CST-6)
Reported by: COOP Observer

Winter Weather in DANE, WISCONSIN
From 12-JAN-12 06:00:00 to 13-JAN-12 03:00:00 (CST-6)
Reported by: COOP Observer

Winter Weather in JEFFERSON, WISCONSIN
From 12-JAN-12 06:00:00 to 13-JAN-12 03:00:00 (CST-6)
Reported by: COOP Observer

Winter Weather in WAUKESHA, WISCONSIN
From 12-JAN-12 06:00:00 to 13-JAN-12 03:00:00 (CST-6)
Reported by: COOP Observer

Winter Weather in MILWAUKEE, WISCONSIN
From 12-JAN-12 06:00:00 to 13-JAN-12 03:00:00 (CST-6)
Reported by: COOP Observer

Winter Weather in MARQUETTE, WISCONSIN
From 12-JAN-12 06:00:00 to 13-JAN-12 03:00:00 (CST-6)
Reported by: COOP Observer

Winter Weather in GREEN LAKE, WISCONSIN
From 12-JAN-12 06:00:00 to 13-JAN-12 03:00:00 (CST-6)
Reported by: COOP Observer

Winter Weather in FOND DU LAC, WISCONSIN
From 12-JAN-12 06:00:00 to 13-JAN-12 03:00:00 (CST-6)
Reported by: COOP Observer

Winter Weather in SHEBOYGAN, WISCONSIN
From 12-JAN-12 06:00:00 to 13-JAN-12 03:00:00 (CST-6)
Reported by: COOP Observer

Winter Weather in LAFAYETTE, WISCONSIN
From 12-JAN-12 06:00:00 to 13-JAN-12 03:00:00 (CST-6)
Reported by: COOP Observer

Winter Weather in GREEN, WISCONSIN
From 12-JAN-12 06:00:00 to 13-JAN-12 03:00:00 (CST-6)
Reported by: COOP Observer

Winter Weather in ROCK, WISCONSIN
From 12-JAN-12 06:00:00 to 13-JAN-12 03:00:00 (CST-6)
Reported by: COOP Observer

Winter Weather in WALWORTH, WISCONSIN
From 12-JAN-12 06:00:00 to 13-JAN-12 03:00:00 (CST-6)
Reported by: COOP Observer

Winter Weather in RACINE, WISCONSIN
From 12-JAN-12 06:00:00 to 13-JAN-12 03:00:00 (CST-6)
Reported by: COOP Observer

Winter Weather in SAUK, WISCONSIN
From 12-JAN-12 06:00:00 to 13-JAN-12 03:00:00 (CST-6)
Reported by: COOP Observer

Winter Weather in KENOSHA, WISCONSIN
From 12-JAN-12 06:00:00 to 13-JAN-12 03:00:00 (CST-6)
Reported by: COOP Observer

Winter Weather in COLUMBIA, WISCONSIN
From 12-JAN-12 06:00:00 to 13-JAN-12 03:00:00 (CST-6)
Reported by: COOP Observer