Two weather systems along with lake effect and lake enhancement will result in rounds of snow for south central and southeast Wisconsin today through Wednesday.The first round of snow will be caused by a weaker area of low pressure located aloft, which will continue to bring a steady snow to southern Wisconsin through tonight. The snow will be occasionally moderate to heavy this afternoon and evening in south central Wisconsin. The first round of snow will result in a widespread 5 to 7 inch snowfall across the region. In addition, east winds will turn to the northeast and increase tonight. This will result in heavier lake effect snow showers and lake enhanced snowfall in portions of southeast and east central Wisconsin.A second much stronger area of low pressure will develop in the southern Plains tonight and track northeast into the mid-Mississippi Valley region by Tuesday evening, and into the northern Ohio Valley by Wednesday morning. This track places much of southern Wisconsin in a swath of heavy snow that would fall later Tuesday into early Wednesday morning. An additional 8 to 15 inches is possible south of a Sheboygan to Madison to Mineral Point line...with another 4 to 8 inches north of there.In addition, strong north to northeast winds of 25 to 40 mph with gusts to 55 mph will result in severe blowing and drifting across southeast Wisconsin and blizzard conditions Tuesday night into Wednesday.
...PROLONGED MAJOR WINTER STORM ON THE WAY FOR MONDAY THROUGH WEDNESDAY... A COLD FLOW OF POLAR AIR FROM THE NORTHEAST IS EXPECTED TO DEVELOP LATE SUNDAY NIGHT AND CONTINUE THROUGH WEDNESDAY AS A LARGE ARCTIC HIGH PRESSURE SYSTEM MOVES INTO THE NORTHERN PLAINS AND EXTENDS ACROSS SOUTHERN CANADA. THIS COLD AIR WILL MOVE ACROSS THE WARM WATERS OF LAKE MICHIGAN...CREATING FAVORABLE CONDITIONS FOR LAKE EFFECT SNOWS. THE LAKE EFFECT SNOWS COULD START BEFORE MONDAY MORNING...ESPECIALLY IN THE SHEBOYGAN AREA. MEANWHILE...THE FIRST WAVE OF SNOW ASSOCIATED WITH STORM NOW MOVING INTO NORTHERN CALIFORNIA IS EXPECTED TO SPREAD ACROSS ALL OF SOUTHERN WISCONSIN MONDAY AND CONTINUE MONDAY NIGHT. THIS WILL BE A PROLONGED LIGHT TO MODERATE SNOW THAT COULD RESULT IN 4 TO 6 INCHES OF SNOW AWAY FROM LAKE MICHIGAN. NEAR THE LAKE...THE ENHANCEMENT CAUSED BY THE LAKE EFFECT SNOWS WILL CONTRIBUTE EVEN MORE SNOW...WITH 6 TO 10 INCHES POSSIBLE. ALTHOUGH AS ALWAYS LAKE EFFECT IS DIFFICULT TO PINPOINT EVEN HOURS IN ADVANCE...IT APPEARS THAT THE AREA AROUND SHEBOYGAN WOULD BE MOST PRONE TO HEAVIER AMOUNTS ON MONDAY AND MONDAY NIGHT. THE PRIMARY STORM WILL THEN DEVELOP OVER THE WESTERN GULF COAST AREA TUESDAY AND THEN LIFT UP THE OHIO RIVER VALLEY TUESDAY NIGHT INTO WEDNESDAY. AS ALWAYS...THERE ARE UNCERTAINTIES ON HOW FAR NORTH THE STORM WILL TRACK. SOME OF THE MODELS ARE NORTH OF THE OHIO RIVER INTO CENTRAL INDIANA...WHICH IS A VERY FAVORABLE TRACK FOR HEAVY SNOW IN THE MILWAUKEE AREA. OTHERS ARE ACROSS KENTUCKY...WHICH IS MORE OF A GLANCING BLOW AND WOULD FAVOR ILLINOIS AND INDIANA. HOWEVER...REGARDLESS OF THE TRACK...IT APPEARS THAT SIGNIFICANT LAKE EFFECT SNOW WILL OCCUR TUESDAY INTO WEDNESDAY. THE CONSENSUS OF AVAILABLE INFORMATION SUGGESTS THAT A MAJOR WINTER STORM WILL AFFECT SOUTHEAST WISCONSIN TUESDAY NIGHT INTO WEDNESDAY. IT APPEARS THAT ADDITIONAL SNOW ACCUMULATIONS ON TOP OF THE MONDAY SNOWFALL WILL TOP 6 INCHES SOUTH OF A LINE FROM LONE ROCK TO BEAVER DAM TO SHEBOYGAN. A FOOT OR MORE IS POSSIBLE SOUTH OF A LINE FROM MONROE TO WAUKESHA TO MILWAUKEE. VERY COLD STORMS WITH LONG DURATIONS LIKE THIS IN THE PAST HAVE PRODUCED 2 FEET OR MORE OF SNOW IN SOUTHEAST WISCONSIN. TEMPERATURES WILL BE IN THE TEENS AND LOWER 20S DURING MOST OF THE EVENT...DECREASING THE EFFECTIVENESS OF SALT. INCREASING WINDS TUESDAY NIGHT MAY RESULT IN BLIZZARD CONDITIONS...ESPECIALLY NEAR THE LAKE SHORE. THE IMPACTS OF THIS STORM COULD BE HIGH GIVEN IT OCCURS DURING THE WORK WEEK. IN ADDITION...SNOW REMOVAL CREWS WILL BE CHALLENGED BY THE MORE THAN 48 HOURS OF ACCUMULATING SNOW THAT COULD REALLY STRESS RESOURCES. ALL RESIDENTS OF SOUTHEAST WISCONSIN ARE URGED TO KEEP A TAB ON THE LATEST FORECASTS AND THE LIKELIHOOD OF WATCHES...WARNINGS ...AND ADVISORIES BEING ISSUED IN THE NEAR FUTURE.
Some of the weather alert displays on the individual pages may not be working. As they are being fixed you can use the state wide weather alert display on the "severe" page. They will soon be back to normal.
Do not pay attention to the the message displaying at the top of the Watches, Warnings and Advisory feeds. "This feed will be redirected starting or shortly after Jan. 18th, 2011" Thank You
Wind Chill Advisory in Affect for All of Wisconsin