(10:00AM – Thursday, June 13th, 2024) Thursday morning update on a storm system that will move through the region today, bringing a round of rain and t’storms to the state from this afternoon through tonight. Severe t’storms will be likely with some of this activity across outlooked areas during this timeframe.
Update…
•With this update, on the severe t’storm forecast for today/tonight, we have slightly expanded the coverage of higher severe t’storm threat levels across portions of the state. This change was made based on increasing forecast confidence, which is due in part to being able to now use real-time observations this morning and finally having agreement from weather model guidance on cold frontal passage timing.
Timing…
•This Afternoon – Tonight, June 13th.
Location…
•Northern & Central Illinois.
Impacts…
•A level 1 to 3 severe t’storm risk is in place across Northern and Central Illinois from this afternoon through tonight for the likelihood of isolated to scattered severe t’storms. Large hail, damaging winds, and an isolated tornado 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”.
Discussion…
•As a cold front slides southward across the state, a round of showers and t’storms will develop across portions of Iowa and Northern Illinois this afternoon. This activity will then track southeastward across portions of Northern and Central Illinois from this afternoon through tonight. An environment will be in place that will be supportive of severe t’storms; thus, some of the activity during this timeframe will likely be severe across the outlooked areas. Forecast soundings suggest large hail and damaging winds will be the greatest threats from activity.
