National Weather Service United States Department of Commerce




Severe Weather Preparedness




Plan, Practice, Monitor, & Act

PPMA pdf file

Click for multipage pdf document.

When is Severe Weather?

Illinois and Indiana Climatology



Watches & WarningsWatches vs Warnings 

Tornado SafetyTornado Safety 

Lightning SafetyLightning Safety 

Flash Flood SafetyFlash Flood Safety 

Severe ThunderstormsSevere Thunderstorm Safety 

Warning ReceptionReception of a Warning 




Tornadoes in Cities 

NWS Chicago Tornado Climatology
Significant Tornadoes in the Chicago Metropolitan Area
Past Tornadoes and Weather Events Across the Area



Short Version   |    Spanish Version