

902 

WWUS20 KWNS 220021

SEL4

SPC WW 220021

OKZ000-220700-



URGENT - IMMEDIATE BROADCAST REQUESTED

Tornado Watch Number 504

NWS Storm Prediction Center Norman OK

720 PM CDT Sat Oct 21 2017



The NWS Storm Prediction Center has issued a



* Tornado Watch for portions of

  Eastern Oklahoma



* Effective this Saturday night and Sunday morning from 720 PM

  until 200 AM CDT.



* Primary threats include...

  A couple tornadoes possible

  Scattered damaging wind gusts to 70 mph possible

  Isolated very large hail events to 2 inches in diameter possible



SUMMARY...Ongoing semi-discrete supercell thunderstorms across

southwest Oklahoma should continue to move toward east-central

Oklahoma this evening while additional linearly organized storms

continue to intensify near a cold front. Damaging winds will be the

most prevalent risk, but some tornado potential will exist as well,

particularly as the low-level jet continues to strengthen this

evening.



The tornado watch area is approximately along and 55 statute miles

east and west of a line from 5 miles south of Durant OK to 25 miles

east northeast of Bartlesville OK. For a complete depiction of the

watch see the associated watch outline update (WOUS64 KWNS WOU4).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



REMEMBER...A Tornado Watch means conditions are favorable for

tornadoes and 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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 502...WW 503...



AVIATION...Tornadoes and 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 500. Mean

storm motion vector 22035.



...Guyer

