Low pressure moving over Chicago to produce winter storm/heavy snow to our north and potential severe weather to our south Tuesday

Winter Storm Warnings/Advisories calling for 4 to 12-inches of snow will extend from Montana through the Dakotas, Minnesota and northern Iowa  through Wisconsin into Michigan during the next 24 to 36 hours (pink and purple-shaded areas on highlighted map). Travel to the north out of Chicago will be extremely hazardous with the combination of heavy wet snow and strong winds causing slick snow-covered roads and poor visibility. At the same time severe thunderstorms are likely to produce large hail and damaging winds from the lower Mississippi Valley up the Ohio River Valley including portions of southern into central Illinois, as well as much of Indiana and Ohio (see Marginal, Slight and Enhanced severe storm potential areas outlined on the Tuesday severe weather outlook map below).

A deepening center of low pressure is forecast to move east-northeast out of Kansas through northern Illinois Tuesday, eventually moving into the Canadian Quebec Province north of Maine Wednesday. The Chicago area will experience initially easterly winds and rain (beginning tonight) with embedded thunderstorms (mainly southern sections) Tuesday. As the low pressure moves through and east of Chicago Tuesday afternoon, winds will shift south and finally northwest, pulling much colder air back into our area, changing rain over to wet, possibly accumulating snow northern portions Tuesday evening, before precipitation ends from the west later Tuesday night.

Tuesday severe weather outlook map…