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URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 537
NWS Storm Prediction Center Norman OK
925 PM CDT Sun Sep 18 2022

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Northern and central Illinois

* Effective this Sunday night and Monday morning from 925 PM
  until 400 AM CDT.

* Primary threats include...
  Scattered large hail likely with isolated very large hail events
    to 2 inches in diameter possible
  Scattered damaging wind gusts to 70 mph possible

SUMMARY...Clusters of supercells near the Mississippi River will
continue to move east-southeastward through the overnight hours into
northern and central Illinois, with some upscale growth possible. 
Large hail will be the primary initial threat, while damaging winds
will be possible with the more intense supercells and any larger
clusters that evolve from the ongoing storms.

The severe thunderstorm watch area is approximately along and 70
statute miles east and west of a line from 40 miles west northwest
of Marseilles IL to 50 miles south southeast of Springfield IL. For
a co*plete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU7).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A Severe Thunderstorm Watch means conditions are
favorable for 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. Severe thunderstorms can and occasionally do produce
tornadoes.

&&

OTHER WATCH INFORMATION...c*NTINUE...WW 536...

AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector
29035.

...Thompson