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WWUS20 KWNS 212140

SEL0

SPC WW 212140

ALZ000-GAZ000-NCZ000-SCZ000-220600-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 300

NWS Storm Prediction Center Norman OK

540 PM EDT Sat Jul 21 2018



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Eastern Alabama

  Northern and central Georgia

  Western North Carolina

  Western South Carolina



* Effective this Saturday afternoon and Sunday morning from 540

  PM until 200 AM EDT.



* Primary threats include...

  Scattered damaging winds likely with isolated significant gusts

    to 75 mph possible

  Scattered large hail likely with isolated very large hail events

    to 3 inches in diameter possible

  A tornado or two possible



SUMMARY...Strong mid/high-level northwesterly winds by mid/late-July

standards will continue to overspread a moist and moderate to

strongly unstable air mass across the region, including some areas

that were impacted by early-day storms. This will include the

potential for some supercells capable of large hail and damaging

winds with storms expected to generally spread southeastward through

the evening.



The severe thunderstorm watch area is approximately along and 75

statute miles north and south of a line from 40 miles west northwest

of Auburn AL to 35 miles east southeast of Spartanburg SC. For a

complete depiction of the watch see the associated watch outline

update (WOUS64 KWNS WOU0).



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.



&&



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

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

few cumulonimbi with maximum tops to 600. Mean storm motion vector

31030.



...Guyer

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