Interactive NWS Alert

Radar valid at 800 pm CDT, May 4th 2026

ILC063-093-099-050100-
/O.NEW.KLOT.SV.W.0108.260505T0013Z-260505T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Chicago/Romeoville
713 PM CDT Mon May 4 2026

The National Weather Service in Chicago has issued a

* Severe Thunderstorm Warning for...
Southern Kendall County in northeastern Illinois...
Northeastern La Salle County in north central Illinois...
Grundy County in northeastern Illinois...

* Until 800 PM CDT.

* At 713 PM CDT, a severe thunderstorm was located near Ottawa,
moving east at 45 mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
Joliet, Ottawa, Morris, Channahon, Minooka, Coal City, Marseilles,
Diamond, Seneca, Serena, Mazon, Braceville, Naplate, Godley,
Dayton, Carbon Hill, Lisbon, Plattville, Wedron, and Norway.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4148 8888 4155 8826 4120 8825 4126 8888
TIME...MOT...LOC 0013Z 270DEG 41KT 4139 8880

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

iNWS is an experimental service intended for NWS core partners, including emergency managers, community leaders and other government agencies only.