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WWUS20 KWNS 261918

SEL4

SPC WW 261918

ILZ000-MOZ000-270300-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 224

NWS Storm Prediction Center Norman OK

220 PM CDT Tue Jun 26 2018



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Extreme southwestern Illinois

  East central and southeastern Missouri



* Effective this Tuesday afternoon and evening from 220 PM until

  1000 PM CDT.



* Primary threats include...

  Scattered damaging wind gusts to 70 mph likely

  Scattered large hail events to 1.5 inches in diameter possible

  A tornado or two possible



SUMMARY...Severe storms along an outflow boundary in southeastern

Missouri will likely persist and move eastward as the low levels

destabilize south of the boundary through the afternoon.  The

environment will support a mix of multicell clusters and supercells,

capable of producing large hail and damaging winds.  Farther west, a

larger cluster of storms is developing toward central Missouri, and

these storms should move along the same corridor later this

afternoon/evening, with damaging winds the primary threat.

Otherwise, given multiple storm/boundary interactions, an isolated

tornado or two will be possible.



The severe thunderstorm watch area is approximately along and 60

statute miles north and south of a line from 35 miles west northwest

of Fort Leonard Wood MO to 20 miles north northeast of Cape

Girardeau MO. For a complete depiction of the watch see the

associated watch outline update (WOUS64 KWNS WOU4).



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 220...WW 221...WW

222...WW 223...



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 550. Mean storm motion vector

29035.



...Thompson

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