***Watch WISN 12 News at 5, 6, & 10pm Saturday for updates on the snowy conditions!***
The weekend is here, but so is more snow! This storm system that is producing snow across Southeast Wisconsin has now been affecting our weather for the past 5 days! Finally on Sunday the snow will come to an end and the system will head east.
Until then we have more accumulating snow in the forecast which we have been discussing here in the blog and on 12 News. A Winter Weather Advisory is in effect for the eastern and southeastern parts of our viewing area. This includes Sheboygan, Milwaukee, Racine, Lake Geneva, and Kenosha just to name a few cities. Most areas will see 2-4″ of snow, but due to lake enhancement near Lake Michigan totals near the lake could be in the 4-6″ range in some backyards.
Here is the radar image just after 2pm on Saturday. I labeled the area in northeast Illinois currently seeing the heaviest snow. This band will try to rotate into extreme southeast Wisconsin and then move close to the lake shore. Areas west of Waukesha County not in the advisory will see less the 2″ of snow, and in some cases under 1″ especially near Madison.
Why are we seeing some lake effect adding to our totals? Let’s check out the surface map. As of about 1:45pm there was a surface low in southwest Wisconsin marked by the ‘L’ on the map below. Wind circulate counterclockwise around low pressure in the northern hemisphere. That means the winds around Milwaukee are out of a southeast direction. This is pushing the cold air tempeatures over the water which is around 40-42 degrees. The air temperature and water temperature is far enough a part for a a little lake effect to enhance the snow already associated with the low pressure area to our west. This means locations close to Lake Michigan will see the highest snow totals this go around. If you are wondering the site marked ‘MKE’ on the map below is Mitchell Airport. It was reporting 1/2 mile visibility and moderate snow(3 *’s) around 1:45pm.
By this evening the winds will begin to shift to the south and then more southwest. This will cut off the lake effect, and as the low meanders by, our snow should taper off to flurries.
Thank you for stopping by the Weather Watch 12 blog. Please post your snow totals in the comments section and I will use them on one of our 12 News shows this evening! If you are venturing out tonight, please use caution on the roadways and make sure to watch 12 News for the latest on the snow.