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URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 423
NWS Storm Prediction Center Norman OK
545 PM CDT Wed Jul 19 2017
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
* Effective this Wednesday afternoon from 545 PM until Midnight
* Primary threats include...
Widespread damaging winds likely with isolated significant gusts
to 80 mph possible
Isolated very large hail events to 2 inches in diameter possible
A tornado or two possible
SUMMARY...A fast-moving linear convective system will continue to
race east/southeastward across the region this evening with the
possibility of widespread damaging wind gusts, along with some hail
and a brief MCS-embedded tornado risk.
The severe thunderstorm watch area is approximately along and 60
statute miles north and south of a line from 50 miles west northwest
of Dubuque IA to 50 miles south southeast of Racine WI. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU3).
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 420...WW 421...WW 422...
AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 70 knots. A
few cumulonimbi with maximum tops to 600. Mean storm motion vector