SPC Severe Thunderstorm Watch 632

SPC Severe Thunderstorm Watch 632

WW 632 SEVERE TSTM IL MO 120640Z – 121500Z

Severe Thunderstorm Watch Number 632
NWS Storm Prediction Center Norman OK
140 AM CDT Sat Aug 12 2023

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of
Central and southern Illinois
Eastern Missouri

* Effective this Saturday morning from 140 AM until 1000 AM CDT.

* Primary threats include…
Isolated very large hail events to 2 inches in diameter possible
Isolated damaging wind gusts to 70 mph possible

SUMMARY…Clusters of organized thunderstorms should move eastward
to southeastward out of northern MO, posing a continued threat for
large hail and damaging to severe gusts after exiting watch 631.
Conditional potential exists for upscale growth of a
better-organized, wind-producing complex.

The severe thunderstorm watch area is approximately along and 55
statute miles either side of a line from 55 miles north northwest of
Saint Louis MO to 60 miles south southeast of Mattoon IL. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU2).


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



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


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