Multi-County Severe Thunderstorm Watch In Effect Until 10:00 p.m.

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:

  • Boone
  • Bureau
  • Carroll
  • Cass
  • Cook
  • De Kalb
  • De Witt
  • Dupage
  • Ford
  • Fulton
  • Grundy
  • Henry
  • Iroquois
  • Jo Daviess
  • Kane
  • Kankakee
  • Kendall
  • Knox
  • Lake
  • La Salle
  • Lee
  • Livingston
  • Logan
  • Marshall
  • Mason
  • Mcdonough
  • Mchenry
  • Mclean
  • Menard
  • Ogle
  • Peoria
  • Putnam
  • Schuyler
  • Stark
  • Stephenson
  • Tazewell
  • Warren
  • Whiteside
  • Will
  • Winnebago
  • Woodford

Ways to prepare and stay safe now

Unplug electronic equipment.
Power surges from lightning can damage computers, monitors and TVs, and cause sparks that might start a fire.
If it’s safe, bring in outdoor furniture and other items that could blow away.
These may become a hazard.
Stay inside a building or car that’s not a convertible.
Rubber tires won’t protect you from lightning so avoid touching metal inside the car.
Close windows, shutters, blinds, shades, and curtains.
This will help keep out wind, rain, and broken glass.
Make sure outside doors are securely closed.
This will help keep out wind and rain.

usil (3)
Green = Flood Warning Light Pink – Severe Thunderstorm Watch Dark Pink – Red Flag Warning

What is a Severe Thunderstorm Watch?

This is issued by the National Weather Service when conditions are favorable for the development of severe thunderstorms in and close to the watch area. A severe thunderstorm by definition is a thunderstorm that produces one inch hail or larger in diameter and/or winds equal or exceed 58 miles an hour. The size of the watch can vary depending on the weather situation. They are usually issued for a duration of 4 to 8 hours. They are normally issued well in advance of the actual occurrence of severe weather. During the watch, people should review severe thunderstorm safety rules and be prepared to move a place of safety if threatening weather approaches.

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.

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