Update: Winter Storm/heavy snow to our north and potential severe weather to our south Tuesday
Update 12:30PM CDT…
Maps for Winter Warning/Advisories as well as severe storm outlook have been updated…slight changes in the narrative below reflect these updates.
Winter Storm Warnings/Advisories calling for 4 to 12-inches of snow will extend from South Dakota, southern Minnesota and northern Iowa across much of Wisconsin into Michigan today and tonight (pink and purple-shaded areas on the highlighted map). Travel to the north out of Chicago into the Warning/Advisory areas 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, damaging winds and possible tornadoes from the lower Mississippi Valley up the Ohio River Valley including portions of southern Illinois, as well as much of Indiana and Ohio (see Marginal, Slight, Enhanced and Moderate severe storm potential areas are outlined on the Tuesday severe weather outlook map below).
A deepening center of low pressure is forecast to move rapidly east-northeast out of Kansas passing just south of Chicago this afternoon, eventually moving into the Canadian Quebec Province north of Maine Wednesday. The Chicago area will experience initially easterly winds and rain today with embedded thunderstorms (mainly south of Chicago. As the low pressure moves through and east of Chicago later this 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 this evening, before precipitation ends from the west later tonight.
Tuesday severe weather outlook map…