The northwest suburbs, including Arlington Heights and southern Buffalo Grove in Cook County, are at the north end of a large TORNADO WATCH zone effective until 7:00 p.m. CDT.
TORNADO WATCH 321 IS IN EFFECT UNTIL 700 PM CDT FOR THE
FOLLOWING LOCATIONS (COUNTIES)
CASS, CHAMPAIGN, CHRISTIAN
COOK, DE WITT, DOUGLAS
DUPAGE, FORD, GRUNDY
IROQUOIS, KANKAKEE, LIVINGSTON
LOGAN, MACON, MASON
MCLEAN, MENARD, MORGAN
MOULTRIE, PIATT, SANGAMON
SCOTT, SHELBY, TAZEWELL
VERMILION, WILL, WOODFORD
The Tornado Watch was activated at 12:05 p.m. CDT on Saturday, June 26, 2021 by the NWS Storm Prediction Center in Norman Oklahoma.
Tornado Watch Defined
Be Prepared! Stay alert for possible Tornado Warning activations by tornado sirens, cellphone alerts, and news media alerts. Tornadoes are possible in and near the watch area. Review and discuss your emergency plans and check supplies and your safe room. Make sure cellphone batteries are charged and other important devices are properly equipped with fresh batteries. Be ready to act quickly if a warning is issued or you suspect a tornado is approaching. Acting early helps to save lives! Watches are issued by the Storm Prediction Center for counties where tornadoes may occur. The watch area is typically large, covering numerous counties or even states where a tornado or tornados may occur.
Tornado Warning Defined
A tornado has been sighted or indicated by weather radar. There is imminent danger to life and property. Move to an interior room on the lowest floor of a sturdy building. Avoid windows. If in a mobile home, a vehicle, or outdoors, move to the closest substantial shelter and protect yourself from flying debris. Warnings are issued by your local forecast office. Compared to a Tornado Watch, Tornado Warnings typically encompass a much smaller area (around the size of a city or small county) that may be impacted by a tornado identified by a forecaster on radar or by a trained spotter or law enforcement officer who is watching the storm.
NOTE: Tornado Warnings cover a precise area, but sometimes provide a very short warning time before a tornado strikes and causes harm. Even within the precise area, some areas may receive little damage; however tornados can make unpredictable turns within the precise area of a Tornado Warning.
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Tornado Outlook Defined
As part of the Day 1 Convective Outlook, the NWS Storm Prediction Center issues an SPC DAY 1 TORNADO OUTLOOK, usually covering a period of about 5 or more hours. A map shows zones where there is probability of a tornado within 25 miles within a point on the map. A Tornado Probability Legend indicates 2%, 5%, 10%, 15%, 30%, 45%, 60% and Significant probability. In Illinois, most outlooks are in the 2% to 5% range.