textproduct: Chicago
This forecast discussion was created in the public domain by the National Weather Service. It can be found in its original form here.
KEY MESSAGES
- Scattered thunderstorms, possibly severe Saturday afternoon into Saturday evening.
- Cooler temps early next week with precip chances midweek.
DISCUSSION
Issued at 223 AM CDT Fri Jun 12 2026
Dry, cooler and breezy conditions are expected today with westerly winds gusting into the 25 mph range from late morning through sunset as highs top out in the lower 80s.
A cold front will move across the northern Plains and upper midwest tonight and then move across the local area Saturday night as low pressure lifts northeast from the southern Plains tonight to central IL Saturday evening. This will allow for scattered thunderstorms to develop, possibly during Saturday afternoon and especially into Saturday evening. While the highest potential for severe storms will be near the track of the surface low, across KS and into south/central IL, still enough uncertainty that trends will need to be monitored for possible severe thunderstorms across the local area, especially the southwest cwa. There are also some timing differences with thunderstorms potentially lingering into early Sunday morning across the southeast cwa. The cold front is expected to move south of the area Sunday morning with dry and cooler temps again Sunday as highs may only reach the lower/mid 70s.
Models show a weaker upper trough moving across the Great Lakes region in the Tuesday time frame possibly bringing a chance of showers and thunderstorms and then a strong upper trough moving across the region Wednesday/Wednesday night along with a surface cold front bringing a better chance for showers and thunderstorms. Depending on timing and precip coverage, temps could increase well into the 80s on Wednesday and then cooler temps for Thursday. cms
AVIATION /12Z TAFS THROUGH 18Z SATURDAY/
Issued at 554 AM CDT Fri Jun 12 2026
Primary forecast concern this period remains gusty westerly winds later this morning through sunset this evening.
West/southwest winds will increase into the 10-15 kt range this morning with gusts into the lower/mid 20kt range, which will continue through sunset this evening. Winds will diminish under 10kt and become southwest this evening. Speeds/gusts will increase again mid/late Saturday morning. Vfr expected through the period. cms
LOT WATCHES/WARNINGS/ADVISORIES
IL...None. IN...None. LM...None.
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