![]() Increasing large scale ascent is helping to drive a region of rain and embedded thunderstorms south of I-80, and this activity will continue to slowly translate north and eastward through the early-morning hours as an associated shortwave trough pivots eastward. MUCAPE is running either side of 1000 J/kg in our south, and water vapor loops depict classic upper divergence within the right entrance region of an intensifying jet streak. The main weather concern through daybreak is the potential for locally heavy rainfall and an isolated flood threat. Waves 1 to 2 ft.Īrea Forecast Discussion National Weather Service Chicago/Romeoville, IL 325 AM CDT Sat Jul 15 2023 Showers likely and a chance of Thunderstorms in the evening, then slight chance of showers overnight. Chance of showers and Thunderstorms in the afternoon. Sunday.West winds 10 to 15 kt increasing to 15 to 20 kt. Chance of showers and Thunderstorms in the evening. Chance of showers in the morning, then a chance of showers and Thunderstorms in the afternoon. ![]() Today.Southwest winds 10 to 15 kt becoming southeast in the afternoon. Lmz740>742-151515- winthrop harbor to wilmette harbor- wilmette harbor to northerly island- northerly island to calumet harbor- 306 am cdt Sat jul 15 2023 Waves are provided as a range of significant wave heights, which is the average of the highest 1/3 of the waves, along with the average height of the highest 10 percent of the waves which will occasionally be encountered. ![]() Nearshore marine forecast national weather service chicago/romeoville il 306 am cdt Sat jul 15 2023įor waters within five nautical miles of shore on lake michigan
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