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WWUS20 KWNS 082004

SEL9

SPC WW 082004

IAZ000-ILZ000-MOZ000-090200-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 89

NWS Storm Prediction Center Norman OK

305 PM CDT Wed Apr 8 2020



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Southeast Iowa

  Western and Central Illinois

  Eastern Missouri



* Effective this Wednesday afternoon and evening from 305 PM

  until 900 PM CDT.



* Primary threats include...

  Scattered damaging winds likely with isolated significant gusts

    to 80 mph possible

  Scattered large hail likely with isolated very large hail events

    to 2.5 inches in diameter possible

  A tornado or two possible



SUMMARY...Storms will quickly increase and intensify near/ahead of a

southeast-accelerating cold front. The environment is favorable for

initial supercells capable of large hail. Damaging winds will also

become an increasing concern by early evening as storms tend to

merge and organize into a fast-moving line particularly across

central/southeast Illinois.



The severe thunderstorm watch area is approximately along and 105

statute miles east and west of a line from 55 miles north of

Bloomington IL to 45 miles south southwest of Saint Louis MO. For a

complete depiction of the watch see the associated watch outline

update (WOUS64 KWNS WOU9).



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 87...WW 88...



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

2.5 inches. Extreme turbulence and surface wind gusts to 70 knots. A

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

29040.



...Guyer

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