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WWUS20 KWNS 010533

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SPC WW 010533

ARZ000-OKZ000-011200-



URGENT - IMMEDIATE BROADCAST REQUESTED

Tornado Watch Number 50

NWS Storm Prediction Center Norman OK

1135 PM CST Tue Feb 28 2017



The NWS Storm Prediction Center has issued a



* Tornado Watch for portions of

  Western and northern Arkansas

  South-central and southeastern Oklahoma



* Effective this Tuesday night and Wednesday morning from 1135 PM

  until 600 AM CST.



* Primary threats include...

  A couple tornadoes possible

  Isolated very large hail events to 2 inches in diameter possible

  Isolated damaging wind gusts to 70 mph possible



SUMMARY...Convection is increasing in coverage and intensity ahead

of a cold front over parts of southern and southeastern OK, and

should move eastward to east-northeastward.  Activity will cross a

favorable cape/shear parameter space for supercells and small bows

with a risk of all severe-storm hazards.  See SPC mesoscale

discussion 230 for initial meteorological details.



The tornado watch area is approximately along and 50 statute miles

north and south of a line from 10 miles south of Ardmore OK to 25

miles north northeast of Batesville AR. For a complete depiction of

the watch see the associated watch outline update (WOUS64 KWNS

WOU0).



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 44...WW 45...WW 46...WW

47...WW 48...WW 49...



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 24035.



...Edwards

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