Warm weather gives way to rain, chill--and even snow

Plummeting temperatures midday today are ushering in thunderstorms and several days of below-normal chill that's expected to last through late in the week — and may even bring snow on Monday.

The temperature at O'Hare International Airport dropped from 68 degrees at 11 a.m. to 51 at 1 p.m., according to the National Weather Service. Lakefront areas saw an even more drastic drop, from 67 degrees at 10 a.m. to 42 at 1 p.m.

Showers and thunderstorms started to move into the southern part of the Chicago area by midday and were expected to hit most of the area over the course of the afternoon. As winds shift to the northeast, storms with frequent ground-to-cloud lightning and periods of heavy rainfall are expected.

"Heavy rains are likely Sunday night into Monday, as cold air rides northeast winds into northeast Illinois and northwest Indiana," according to the Chicago Weather Center blog.

Low temperatures are expected to drop to the upper 30s. Winds are expected to pick up this evening and may hit 15 to 25 mph, with 40 mph gusts.

A windy, cloudy Monday will see highs in the upper 30s, with rain in the morning and a chance of rain and light snow in the afternoon, according to the weather service.

Monday night, temperatures will drop into the upper 20s, about 10 degrees below the average low temperature for April 14, according to the weather service. Rain and light snow is expected to continue into late Monday night.

The rest of the week will see temperatures well below the normal highs in the upper 50s, with Tuesday only hitting about 40 and Wednesday about 50. Temperatures will be below freezing again Tuesday.

Thursday, temperatures are expected to return to around normal, but Friday and Saturday may see weather with slightly below-normal temperatures.

For updates on the forecast, check the Tribune's weather page.

chicagobreaking@tribune.com | Twitter: @ChicagoBreaking

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