Line of thunderstorms approaching from the west this Thursday evening

Updated 11:10PM CDT…

The line of showers and thunderstorms moving east across northern Illinois will likely reach Cook County and the immediate Chicago area by midnight. Along and ahead of the storms will be vivid lightning and gusty winds to 40 mph. Under the stronger cells brief heavy downpours could cut visibility to near zero.

Between midnight and 1AM this band of showers and thunderstorms should be east of Chicago moving into/across Lake Michigan and  northwest Indiana.

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Updated 10:35PM CDT…

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN
LA SALLE COUNTY UNTIL 1100 PM CDT...



AT 1022 PM CDT, DOPPLER RADAR WAS TRACKING 
A STRONG THUNDERSTORM OVER NORTH UTICA, OR
NEAR LA SALLE, MOVING NORTHEAST AT 35 MPH.

WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
OTTAWA, PERU, MARSEILLES, OGLESBY, SERENA, LA SALLE, SPRING VALLEY,
SHERIDAN, UTICA, NORTH UTICA, NAPLATE, CEDAR POINT AND TROY GROVE.

INCLUDING THE FOLLOWING INTERSTATES...
 I-39 BETWEEN MILE MARKERS 51 AND 66.
 I-80 BETWEEN MILE MARKERS 73 AND 101.

THIS INCLUDES...  BUFFALO ROCK STATE PARK, ILLINI STATE PARK,
ILLINOIS VALLEY COMMUNITY COLLEGE, MATTHIESSEN STATE PARK, AND
STARVED ROCK STATE PARK.

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Updated 10:30PM CDT…

The line of thunderstorms has shown signs of slight weakening as it progresses eastward – approaching the Fox River Valley. Vivid lightning will accompany the storms, wind gusts to 40 miles per hour out ahead of the storms are likely, along with brief heavy downpours under the stronger cells bringing visibility to near zero.

Check the Interactive radar display at the top of wgntv.com as well as the Regional Weather radar map below.

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Updated 9:40PM CDT…

...SIGNIFICANT WEATHER ADVISORY FOR
NORTHWESTERN LA SALLE...SOUTHEASTERN
 OGLE AND CENTRAL LEE COUNTIES 
UNTIL 1015 PM CDT...

AT 935 PM CDT, DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING
FROM NEAR FRANKLIN GROVE TO AMBOY TO NEAR 
LA MOILLE. MOVEMENT WAS NORTHEAST AT 25 MPH.

WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
DIXON, ROCHELLE, MENDOTA, WALTON, AMBOY, HILLCREST, FRANKLIN GROVE,
ASHTON, SUBLETTE, COMPTON AND WEST BROOKLYN.

INCLUDING THE FOLLOWING INTERSTATE...
 I-88 BETWEEN MILE MARKERS 54 AND 77.

THIS INCLUDES...  LEE COUNTY FAIRGROUNDS AND TRI-COUNTY FAIRGROUNDS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THESE STORMS, AND MAY LEAD
TO LOCALIZED FLOODING.

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At 9:30PM CDT a line of thunderstorms that earlier crossed the Mississippi River is approaching the Interstate-39 corridor. As the line moves east, individual storm cells are moving east-northeast (see latest Chicago National Weather Service projected storm movement map below.

Stronger storms will have brief heavy downpours dropping visibility to near zero, vivid lightning and possible wind gusts to 40-45 mph.

Latest Regional Weather Radar…