A tornado watch is in effect until pm across portions of central, western and southern Illinois. Clearing skies and warming temperatures beneath a pocket of very cold air aloft will promote the development of thunderstorms this afternoon across these areas.
Additionally, wind shear is quite strong as the mid and upper level jets wrap around a tight area of low pressure moving in from the plains.
Here are the watch details.
ILLINOIS COUNTIES INCLUDED ARE
ADAMS BROWN CALHOUN CASS CHRISTIAN DE WITT FULTON GREENE HANCOCK JERSEY KNOX LOGAN MACON MACOUPIN MASON MCDONOUGH MCLEAN MENARD MONTGOMERY MORGAN PEORIA PIATT PIKE SANGAMON SCHUYLER SCOTT
URGENT - IMMEDIATE BROADCAST REQUESTED Tornado Watch Number 434 NWS Storm Prediction Center Norman OK 215 PM CST Sat Dec 1 2018 The NWS Storm Prediction Center has issued a * Tornado Watch for portions of Central Illinois East-central Missouri
* Effective this Saturday afternoon and evening from 215 PM until 700 PM CST. * Primary threats include... A couple tornadoes possible Scattered damaging wind gusts to 70 mph possible Scattered large hail events to 1.5 inches in diameter possible
SUMMARY...Thunderstorms are forming along the Mississippi River, and will spread northeastward across the watch area this afternoon. A few storms may become severe, capable of damaging winds, hail, and perhaps a few tornadoes. The tornado watch area is approximately along and 60 statute miles east and west of a line from 25 miles northeast of Peoria IL to 65 miles south southwest of Springfield IL. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU4).
PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Tornado Watch means conditions are favorable for tornadoes and severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings.
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