(11:00PM - 9/21/19) The combination of a storm system moving through the region and the remnants of Tropical Storm Imelda, will bring several rounds of rain and t'storms to the state through Sunday night.
Several waves of organized rain and t’storms have already occurred across portions of the state today and tonight, will continue to be likely across portions of the state through Sunday night. The most concentrated area for this activity will be across portions of Northern and Central Illinois. Upwards of 1-2” of rain has already fallen across portions of Northern and Central Illinois today into tonight. Final widespread rainfall totals this weekend will be in the 1-3” range across much of Northern and Central Illinois, with isolated corridors of 3-6” totals not out of the question for portions of Western into Northern Illinois. These high rainfall totals over a relatively short period of time will lead to flooding concerns for much of Northern and Central Illinois, including portions of Northern Illinois that have already been impacted with heavy rainfall totals and flooding the past few weeks. We have included a large portion of Northern and Central Illinois in a moderate threat for flooding potential.
Below is the TAM flood forecast through Sunday night.