Following the Vernal Equinox on Tuesday, a return to predominantly southerly wind flow will bring another spring-like 30-degree temperature swing to the Chicago area, pushing readings temporarily back to mid-May levels Thursday and Friday accompanied by a significant increase in humidity. To start the week, a band of rain will spread over northeast Illinois later tonight and diminish Monday morning as the triggering cold front moves east. After about a 36-hour cool, dry period, a warm front Wednesday is expected to trigger an all-day rain that could feature thundery downpours. With the warm front to the north, a warm humid air mass will be in place over the area. Thursday and Friday daytime high temperatures could warm into the 70s; but with a cold front slowly approaching from the west, the amount of cloud cover and the possibility of showers or thunderstorms will influence readings considerably.
--By Paul Dailey, WGN Weather Center Meteorologist
WGN-TV Chief Meteorologist Tom Skilling and the WGN Weather Center staff provide daily coverage of weather in the Chicago area.
