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Grundy County IL Emergency Management Agency
Monday August 18th, 2025 :: 05:47 p.m. CDT

Advisory

Severe Thunderstorm Watch until 08:00PM

SEVERE THUNDERSTORM WATCH 599, PREVIOUSLY IN EFFECT UNTIL 6 PM CDT THIS EVENING, IS NOW IN EFFECT UNTIL 8 PM CDT THIS EVENING FOR THE FOLLOWING AREAS IN ILLINOIS THIS WATCH INCLUDES 10 COUNTIES IN NORTH CENTRAL ILLINOIS BOONE DE KALB LA SALLE LEE OGLE WINNEBAGO IN NORTHEAST ILLINOIS GRUNDY KANE KENDALL MCHENRY THIS INCLUDES THE CITIES OF ALGONQUIN, AURORA, BELVIDERE, BYRON, COAL CITY, CRYSTAL LAKE, DEKALB, DIXON, ELGIN, LA SALLE, MARSEILLES, MCHENRY, MENDOTA, MINOOKA, MORRIS, OREGON, OSWEGO, OTTAWA, PLANO, ROCHELLE, ROCKFORD, STREATOR, SYCAMORE, WOODSTOCK, AND YORKVILLE.

* AFFECTED AREAS: BOONE, IL ... DE KALB, IL ... GRUNDY, IL ... KANE, IL ... KENDALL, IL ... LA SALLE, IL ... LEE, IL ... MCHENRY, IL ... OGLE, IL ... WINNEBAGO, IL

Address/Location
Grundy County IL Emergency Management Agency
1320 Union St
Morris, IL 60450

Contact
Emergency: 9-1-1
Non-emergencies: 815-941-3212

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Alert Details

Severity:
Severe - Significant threat to life or property
Urgency:
Future - Responsive action SHOULD be taken in the near future
Certainty:
Possible (p <= ~50%)
Category:
Meteorological (inc. flood)
Event:
Severe Thunderstorm Watch

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