A wintry start, then week becomes springlike

After experiencing highs averaging 18 degrees below normal the first two days of the
week, Chicagoans are in for springlike readings 15 degrees above normal Wednesday to
Saturday. A strong northwesterly jet stream will hold cold Canadian-source high pressure over
the Midwest one more day. Then the winds will shift, becoming more west to southwesterly,
allowing a warming southerly flow to return to the Mississippi Valley and the Midwest by
midweek. Showers and thunderstorms will be in the forecast from Thursday into next
weekend.
MAJOR EAST COAST WINTER STORM
Low pressure moving up the Eastern seaboard late Sunday and Monday will dump over a foot
of snow from the southern Appalachians through Washington, D.C., to north of Boston.
--By Paul Dailey, WGN Weather Center Meteorologist