(11:00PM Fri, July 28th 2023) Friday night update regarding multiple disturbances that will continue to move through the region through Saturday, along the northern periphery of a ridge in place across the region. This pattern will continue to support chances for rain/t’storms and severe t’storms across portions of the state for one final day in this period, on Saturday.
•With this update we have adjusted severe t’storm probabilities across the state on tonight’s forecast, based on real time information and trends.
•With this update we have slightly adjusted severe t’storm probabilities southward across the southern half of the state, based on the trends and the latest model guidance.
Timing & Location…
•Tonight – Early Saturday Morning, July 28-29th: Northern & Central Illinois.
•Early Saturday Morning – Saturday Night, July 29th: Central & Southern Illinois.
•A level 1 to 2 severe t’storm risk is in place across Northern and Central Illinois, from this tonight through early Saturday morning. Isolated to widely scattered severe t’storms will be likely, posing a risk of damaging winds, large hail and an isolated tornado.
•A level 1 severe t’storm risk is in place across Southern Illinois, from early Saturday morning through Saturday night. Isolated severe t’storms will be likely, posing a risk of damaging winds and large hail.