WWUS20 KWNS 211817

SEL8  

SPC WW 211817

ILZ000-INZ000-KYZ000-220200-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 508

NWS Storm Prediction Center Norman OK

120 PM CDT Tue Jul 21 2026



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of 

  Far Southern Illinois

  Far Southern Indiana

  Kentucky



* Effective this Tuesday afternoon and evening from 120 PM until

  900 PM CDT.



* Primary threats include...

  Widespread damaging wind gusts to 70 mph likely

  Scattered large hail events to 1.5 inches in diameter possible

  A tornado or two possible



SUMMARY...Thunderstorms coverage and intensity is expected to

increase this afternoon along a cold front pushing southeastward

into the region. Very warm and moist conditions ahead of the front

will support robust buoyancy, with moderate vertical shear in place

as well. Initial supercells could produce all severe hazards,

including isolated large hail and potentially even a brief tornado.

A trend towards a more linear mode is anticipated with time, with

damaging gusts as the primary severe risk.



The severe thunderstorm watch area is approximately along and 60

statute miles north and south of a line from 30 miles east northeast

of Lexington KY to 30 miles north northwest of Paducah KY. For a

complete depiction of the watch see the associated watch outline

update (WOUS64 KWNS WOU8).



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...CONTINUE...WW 506...WW 507...



AVIATION...A few severe thunderstorms with hail surface and aloft to

1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A

few cumulonimbi with maximum tops to 500. Mean storm motion vector

29030.



...Mosier