Sauk County, WI
Winter Storm Watch:
Issued at: 3:54 PM CST 12/6/09, expires at: 12:00 AM CST 12/7/09
Winter storm watch in effect from Tuesday evening through wednesday evening,
The NWS in milwaukee/sullivan has issued a winter storm watch, which is in effect from Tuesday evening through Wednesday evening.
Timing: Occasional light to moderate snow is expected to move into southwest Wisconsin between 10 am and 12 noon Tuesday morning, and spread across the rest of southern Wisconsin by 6 pm Tuesday. Right now it appears snowfall will be heaviest between 12 midnight and 8 am Wednesday, then taper off to scattered snow showers and flurries by Wednesday evening.
Snow accumulations: 10 to 13 inches with the axis of heaviest snow appearing to be along and either side of a line from lone rock to sheboygan.
Winds: East at 10 to 15 mph, turning northeast and increasing to 15 to 20 mph overnight Tuesday. The winds turn northwest and increase to between 20 and 30 mph, with gusts to 40 mph by late Wednesday morning and afternoon, then become west and slowly diminish to 10 to 15 mph overnight.
Impacts:travel during the evening rush hour on Tuesday will become difficult with the intensifying snow, with visibility reduced to one half mile or less. Heavy snow overnight will make travel hazardous, with blowing and drifting snow creating whiteout conditions through Wednesday morning and afternoon.
While it is anticipated that this watch will probably be upgraded to a winter stormi warning, there is a potential for a portion of the forecast area to be upgraded to a blizzard warning if the storm intensifies more than currently forecast. It will be important to monitor later forecasts, statements.
Precautionary/preparedness actions,
A winter storm watch means there is a potential for significant snow, sleet, or ice accumulations that may impact travel. Continue to monitor the latest forecasts.