The majority of the forecast for the Chicago region this week feels like summer.
However, there is a remote potential that a few severe storms in western Illinois will flow into the western and southern areas of the region Sunday evening.
Severe Thunderstorms moving through Chicago
(Photo : MUHAMMAD FAROOQ/AFP via Getty Images)
A Severe Thunderstorm Warning is in effect for much of the southern Chicago region until 4 a.m.
Ping pong-sized hail was also observed at Kane County's DuPage Airport. Nickel-sized hail was also observed in Kane County's Saint Charles, as per CBS News.
Until midnight, strong thunderstorms are likely to strike northern Cook County.
Storms are expected to form south of Interstate 80 and west of Interstate 57, affecting LaSalle, Grundy, Kendall, Kane, and Kankakee counties, between 9 p.m. and midnight. and 12 a.m.
Thunderstorm warnings or an isolated Tornado Warning are not out of the question.
Storms should be over by sunrise. The low temperature on Sunday night will be 65 degrees.
Summer weather continues Monday with a partly overcast sky and high temperatures reaching 81 degrees.
Temperatures will continue hot through Wednesday before dropping significantly. Fall arrives on Thursday, followed by colder weather by the end of the week.
Gloomy skies and calming morning
Rain will finish the weekend in Chicago and its suburbs, bringing in another day of gloomy skies and sporadic thunderstorms, some of which might be severe.
The morning should be rather quiet. Clouds will most likely pass over the area, allowing some sun to shine briefly in the afternoon.
Temperatures are forecast to reach the mid-80s, with a high of 84 probable.
Severe weather is possible in the late afternoon and evening.
The Chicago region is at "marginal risk" of severe weather, the lowest of five potential alert levels on the SPC scale, according to the Storm Prediction Center.
The NBC 5 Storm Team predicts destructive gusts, hail, and heavy, localized rainfall, however the potential of severe thunderstorms is centered in the far southwest region, which has a "slight" chance of severe weather, according to the SPC.
Storms are expected to persist over the region overnight and into the early hours of Monday.
Temperatures are predicted to drop into the mid-60s overnight and should rise again on a partly overcast Monday, with a high of 78 expected.
For the most part, the rest of the week will be mild and calm, with only a tiny risk of showers on Tuesday.
At the start of the period, widespread showers and embedded thunderstorms should continue over eastern areas of the Ohio Valley and into the Appalachians, as per NOAA.
Deep-layer ascent will encourage greater convective coverage as a prominent mid-level trough and associated surface trough travel eastward during the day.
By late morning/early afternoon, some insolation may occur throughout the Hudson Valley, leading to surface temperatures reaching the 70s with dewpoints in the low 60s F.
When stretched by 6 C/km mid-level lapse rates, a tall, slender CAPE profile with roughly 1000 J/kg MLCAPE should appear.
Largely unidirectional vertical wind profiles with moderate speed shear will provide effective bulk shear of 40 kts.
Related article: Extremely Dangerous Thunderstorms to Ravage the American Midwest
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