

829 

WWUS20 KWNS 220051

SEL5

SPC WW 220051

TXZ000-220700-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 505

NWS Storm Prediction Center Norman OK

750 PM CDT Sat Oct 21 2017



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  North Texas



* Effective this Saturday night and Sunday morning from 750 PM

  until 200 AM CDT.



* Primary threats include...

  Isolated very large hail events to 2 inches in diameter possible

  Isolated damaging wind gusts to 70 mph possible

  A tornado or two possible



SUMMARY...Scattered semi-discrete storms should continue to

intensify across western parts of North Texas this evening with more

extensive development occurring as the cold front continues to

overtake the dryline through late evening and overnight. Bouts of

severe hail will initially be possible, although locally damaging

wind gusts should become more prevalent by late evening and

overnight as storms trend more linear. Some tornado risk cannot be

entirely ruled out, particularly across far north Texas areas closer

to the Red River.



The severe thunderstorm watch area is approximately along and 45

statute miles north and south of a line from 25 miles west southwest

of Abilene TX to 70 miles east southeast of Sherman TX. For a

complete depiction of the watch see the associated watch outline

update (WOUS64 KWNS WOU5).



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 502...WW 503...WW 504...



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

27025.



...Guyer

