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WWUS20 KWNS 162041

SEL7

SPC WW 162041

COZ000-KSZ000-NMZ000-OKZ000-TXZ000-170400-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 177

NWS Storm Prediction Center Norman OK

340 PM CDT Sun May 16 2021



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Southeast Colorado

  Southwest Kansas

  Northeast New Mexico

  Oklahoma Panhandle

  Northwest Texas



* Effective this Sunday afternoon and evening from 340 PM until

  1100 PM CDT.



* Primary threats include...

  Scattered large hail and isolated very large hail events to 2

    inches in diameter possible

  Scattered damaging wind gusts to 70 mph possible

  A tornado or two possible



SUMMARY...Although deep-layer winds are not overly strong, a

semi-moist and moderately unstable environment will support

initially isolated severe thunderstorm development across southeast

Colorado, northeast New Mexico into the Texas Panhandle. Isolated

large hail is the primary risk initially. Over time, one or more

clusters of storms should evolve by early/mid evening and move

east-southeastward with increasing damaging wind potential across

the Texas Panhandle toward the Low Rolling Plains.



The severe thunderstorm watch area is approximately along and 105

statute miles north and south of a line from 70 miles west northwest

of Clayton NM to 65 miles east southeast of Borger TX. For a

complete depiction of the watch see the associated watch outline

update (WOUS64 KWNS WOU7).



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

2 inches. Extreme turbulence and surface wind gusts to 60 knots. A

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

31020.



...Guyer

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