(10:30AM – Tuesday, May 21st, 2024) Tuesday morning update on a storm system will continue to move through the region, bringing additional rounds of rain and t’storms, with the likelihood for severe t’storms, to portions of the state through Wednesday, May 22nd.
Update…
•With this update, a few slight adjustments were needed in regards to the placement of severe t’storm probabilities on the severe t’storm forecast for today/tonight. These minor changes were made based on trends in the latest weather model guidance.
•With this update, little in the way of changes were needed on the severe t’storm forecast for Wednesday/Wednesday night.
Timing & Location…
•Tuesday Afternoon – Wednesday Morning, May 21-22nd: All of Illinois.
•Wednesday Morning – Wednesday Night, May 22nd: Southern Illinois.
Impacts…
•A level 1 to 3 severe t’storm risk is in place across all of Illinois from this afternoon through Wednesday morning for the likelihood of isolated to scattered severe t’storms. Damaging winds, large hail, and a few tornadoes will be the threats from activity. Across the significant severe corridor… Environmental conditions will be supportive of the possibility of occurrences of damaging winds 75MPH+, corridors of widespread/significant wind damage, and hail larger than 2.00”. A round of widespread showers and t’storm will traverse the state from Tuesday afternoon through early Wednesday morning. A severe t’storm threat will exist across outlooked areas with this activity.
•A level 1 severe t’storm risk is in place across Southern Illinois from Wednesday morning through Wednesday night for the possibility of isolated severe t’storms. Damaging winds, large hail, and an isolated tornado will be the threats from activity. A weakening round of showers and t’storms will be exiting Southern Illinois early Wednesday morning. Another round of scattered showers and t’storms is then expected from Wednesday afternoon into Wednesday night. An isolated severe t’storm threat will exist across outlooked areas with the round of later day activity.
