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WWUS20 KWNS 130121

SEL5

SPC WW 130121

ILZ000-INZ000-MOZ000-130800-



URGENT - IMMEDIATE BROADCAST REQUESTED

Tornado Watch Number 575

NWS Storm Prediction Center Norman OK

825 PM CDT Mon Aug 12 2019



The NWS Storm Prediction Center has issued a



* Tornado Watch for portions of

  Central Illinois

  Western and central Indiana

  Extreme eastern Missouri



* Effective this Monday night and Tuesday morning from 825 PM

  until 300 AM CDT.



* Primary threats include...

  A couple tornadoes possible

  Scattered damaging winds likely with isolated significant gusts

    to 75 mph possible

  Isolated large hail events to 1.5 inches in diameter possible



SUMMARY...Increasingly focus band of convection has formed over

central IL, along with isolated, potentially severe convection

northwest of STL, all moving into a favorable environment for

supercells and bow echoes.  Activity should progress

east-southeastward over the watch area, with all severe types

possible.



The tornado watch area is approximately along and 45 statute miles

north and south of a line from 60 miles northwest of Alton IL to 30

miles south southeast of Indianapolis IN. For a complete depiction

of the watch see the associated watch outline update (WOUS64 KWNS

WOU5).



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.



&&



AVIATION...Tornadoes and a few severe thunderstorms with hail

surface and aloft to 1.5 inches. Extreme turbulence and surface wind

gusts to 65 knots. A few cumulonimbi with maximum tops to 550. Mean

storm motion vector 28030.



...Edwards

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