Overview

• Scattered showers and thunderstorms are expected to develop late Friday night into Saturday morning, some capable of heavy downpours.
• The Storm Prediction Center has issued a Marginal Risk for the Chicago metro from 7 a.m. Saturday through 7 a.m. Sunday, with gusty winds as the main severe threat.
• Clouds should thin by Saturday afternoon, allowing highs in the lower 90s and heat indices near 100 degrees.
• A cool lake breeze will temper temperatures along the Lake Michigan shoreline while inland areas remain hotter.
• Reduced cloud cover will increase UV exposure by midday, raising the risk of sunburn despite intermittent overcast.