As the midday sun drops lower in the sky, each day loses almost 3 minutes of daylight from the day before. Thursday will signal the autumnal equinox as the sun at its zenith is directly over the equator. Chicagoans are noticing the shortening days, but the coming week will still seem like summer with temperatures averaging some 10° above normal.
Scattered showers or thunderstorms are expected ahead of a cold front late Monday night and early Tuesday. Thursday through Saturday showers or thunderstorms will be in the forecast as first a cold front and then a warm front traverses the area. Timing of these storms, especially those later in the week is very difficult.
As Ophelia weakens and moves into the north Atlantic, a new tropical storm is developing east and north of the Lesser Antilles. Daily dangerous heat indices well above 100° are expected this week in New Orleans area as recovery work continues.
WGN-TV Chief Meteorologist Tom Skilling and the WGN Weather Center staff provide daily coverage of weather in the Chicago area.
