Update: Thunderstorms expected east of I-55

ROMEOVILLE — The National Weather Service revised its hazardous weather outlook on Saturday afternoon, calling for scattered showers and thunderstorms in the evening east of Interstate 55.

For Lake Michigan boaters, a small craft warning was also in effect for the Michigan coast, with northwest winds 15 to 25 knots and waves 3 to 5 feet expected.

Earlier in the day, the NWS issued a hazardous weather outlook for Winnebago, Boone, McHenry, Lake, Ogle, Lee, De Kalb, Kane, DuPage, La Salle, Kendall, Grundy, Kankakee, Livingston, Iroquois, Ford, Cook and Will counties. Parts of northern Indiana were also listed in the alert.

The storm system is moving in a northeasterly direction at about 40 mph, the service said.

There will be scattered thunderstorms throughout the afternoon and evening, developing along with occasional showers. The severe weather threat is low, through it is possible that storms south of the Kankakee River Valley may have small hail and gusty winds, the weather service said.

In its extended forecast, the service said a similar thunderstorm risk could develop for Tuesday evening.