Clouds will be more extensive than in recent days but with some sunshine mixed in at times. Clusters of thunderstorms may impact half the metro area, the heaviest capable of downpours, hail and gusty winds. Atmospheric moisture levels are high which means storms may produce quick 1 to 2” rainfalls in harder hit locations. Additional thunderstorm clusters can’t be ruled out overnight. Afternoon highs in the middle 80s, but readings will lower in and near thunderstorms. Muggy overnight lows in the lower 70s.
Chance of a few isolated afternoon or evening thunderstorms re-developing. Peak temperatures reach the lower 90s away from Lake Michigan with a heat index around 100-degrees. South winds give way to easterly lake breezes shoreline locations modestly restricting warming there to mid or upper 80s.
East winds 5 to 14 mph will help establish quite a range in high temperatures across with peak readings ranging from low 90s south and southwest suburbs to 89 at O’Hare and the low 80s north lakeshore communities. Low to mid 80s with possible fog patches on Chicago beaches. Top daytime heat indices in hotter inland locations reach the upper 90s. Warming aloft may Partly cloudy, hazy, warm and muggy overnight with east winds gradually veering southeast to south.
The windshift is likely to propel daytime high temperatures back into the low or mid 90s in all but immediate lakeshore locations and on Chicago beaches where upper 80s to near 90 are expected. Sunday’s top heat index values are likely to approach 100 degree. A good deal of sunshine with some cottony summertime cumulus clouds likely. Partly cloudy, warm and muggy Sunday night. Southwest wind 6 to 15 mph. Winds are likely to become southeast on area beaches in the afternoon producing modestly lower temps there.
Better organized south to southwest winds than in recent days take up residence here averaging 10 to 22 mph Remaining warm and quite muggy Monday night with lows in the lower 70s.
Scattered mainly afternoon and evening showers and thunderstorms possible. Temperatures are to move to within striking distance of 90-degrees, warmth dictated by another day of south to southwest winds 8 to 18 mph.
Several clusters of showers and gusty thunderstorms likely. A good chance of clouds and thunderstorms overnight. Southwest winds shift northwest late.
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