Stephenson County, Illinois — A Severe Thunderstorm Watch is in effect until 10:00 PM CDT according to the National Weather service. The Severe Thunderstorm Watch is in effect for the following Illinois locations.
Illinois counties included are:
- De Kalb
- De Witt
- Jo Daviess
- La Salle
Ways to prepare and stay safe now
What is a Severe Thunderstorm Watch?
A Severe Thunderstorm Watch is issued by the Storm Prediction Center in Norman, Oklahoma. Prior to the issuance of a Severe Thunderstorm Watch, SPC will usually contact the affected local National Weather Service Forecast Office (NWFO) and they will discuss what their current thinking is on the weather situation. Afterwards, SPC will issue a preliminary Severe Thunderstorm Watch and then the affected NWFO will then adjust the watch (adding or eliminating counties/parishes) and then issue it to the public by way of a Watch Redefining Statement. During the watch, the NWFO will keep the public informed on what is happening in the watch area and also let the public know when the watch has expired or been cancelled.