Strong thunderstorms moving across the Interstate-39 corridor this Friday morning

Update 12:25PM CDT…

A few more heavy rainfall reports have been received…all observed in Winnebago County this morning…

WTVO in Rockford…2.89 -inches
0.8 miles southeast of Winnebago…3.16-inches
3.7 miles northeast of Durand…0.75-inches

Update 10:20AM CDT…

The storms have weakened and moved off to the northeast. The Flash Flood Warning has ended. Because some flooding will continue due to 3 to 5-inch rainfalls this morning, a Flood Warning for portions of Ogle, Lee and Winnebago Counties will be in effect until mid-afternoon n those areas. 


Update 8:30AM CDT…

Thunderstorms have moved little during the past hour – still oriented north-south along the Interstate-39 corridor. Local flooding has been reported in the Rochelle area where 4.60-inches of rain has fallen. 

Here are a few rainfall reports in that area this morning…

Rochelle (Ogle County)…4.60-inches
Rockford Airport…1.77-inches
5.5 miles south of Rockford…1.43-inches
Mendota (LaSalle County)…1.00-inches
0.7 miles northwest of Rockford…0.79-inches
Byron (Lee County)…0.56-inches
Ashton (Lee County)…0.33-inches
3.3 miles northeast of Rockford…0.33-inches

Update 7:25AM CDT…

Anticipating storms to concentrate along the Interstate-39 corridor and continue the remainder of the morning, the Urban and Small Stream Flood Advisory has been upgraded to a Flash-Flood Warning effective until early this afternoon.


Update 6:30AM CDT…

An Urban and Small Stream Flood Advisory has been issued for much of this area along the I-39 corridor until 9:30AM CDT calling for minor localized flooding in areas of heaviest rainfall – up to 2-inches of rain has fallen in a few locations. Individual storms are moving very slowly east allowing more rain to fall over  a given area.


A band of strong thunderstorms is moving east – crossing the Interstate-39 corridor ( portions of Winnebago, Boone, Ogle, Lee, DeKalb and LaSalle Counties) between 6 and 7AM CDT this Friday morning. Strongest storms will carry brief heavy downpours, gusty winds, small hail to dime-size and frequent lightning.

Weather radar mosaic…