

423 

WWUS20 KWNS 042340

SEL6

SPC WW 042340

ALZ000-GAZ000-NCZ000-TNZ000-050500-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 166

NWS Storm Prediction Center Norman OK

640 PM CDT Mon May 4 2020



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Extreme northern Alabama

  North Georgia

  Extreme southwestern North Carolina

  Much of middle and southeast Tennessee



* Effective this Monday night from 640 PM until Midnight CDT.



* Primary threats include...

  Scattered damaging winds likely with isolated significant gusts

    to 75 mph possible

  Scattered large hail and isolated very large hail events to 2

    inches in diameter possible

  A tornado or two possible



SUMMARY...Multiple storm clusters and supercells in western

Tennessee will likely undergo some upscale growth through cell

mergers/interactions the next few hours, with bow echo development

possible.  The initial supercells will pose a threat for large hail,

but damaging winds will become the more substantial threat in time.

A tornado or two with embedded circulations/mesovortices will also

be possible, mainly across middle Tennessee this evening.



The severe thunderstorm watch area is approximately along and 50

statute miles north and south of a line from 85 miles west southwest

of Nashville TN to 65 miles east of Chattanooga TN. For a complete

depiction of the watch see the associated watch outline update

(WOUS64 KWNS WOU6).



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 163...WW 164...WW 165...



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

2 inches. Extreme turbulence and surface wind gusts to 65 knots. A

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

29045.



...Thompson

