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URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 245
NWS Storm Prediction Center Norman OK
415 AM CDT Fri May 19 2017
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
* Effective this Friday morning from 415 AM until 1000 AM CDT.
* Primary threats include...
Isolated damaging wind gusts to 70 mph possible
Isolated large hail events to 1.5 inches in diameter possible
SUMMARY...A fast-moving cluster of storms will likely continue to
pose a risk for isolated damaging wind gusts and some hail as it
moves toward far eastern Missouri (including the St Louis Metro
area) into western Illinois.
The severe thunderstorm watch area is approximately along and 55
statute miles east and west of a line from 30 miles north of Alton
IL to 10 miles southwest of Farmington MO. For a complete depiction
of the watch see the associated watch outline update (WOUS64 KWNS
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
OTHER WATCH INFORMATION...CONTINUE...WW 244...
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