SPC Severe Thunderstorm Watch 446



WW 446 SEVERE TSTM AR LA TX 270600Z – 271100Z

WW 0446 Image


URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 446
NWS Storm Prediction Center Norman OK
1200 AM CST Thu Dec 27 2018

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Southwest Arkansas
  Northern Louisiana
  Northeast Texas

* Effective this Thursday morning from Midnight until 500 AM CST.

* Primary threats include...
  Isolated damaging wind gusts to 70 mph possible
  A tornado or two possible

SUMMARY...A squall line will continue to race east-northeastward
overnight. Although the environment is not overly moist or unstable,
very strong low-level shear will support embedded bowing segments
capable of wind damage and possibly some tornado risk.

The severe thunderstorm watch area is approximately along and 45
statute miles east and west of a line from 40 miles northeast of
Texarkana AR to 25 miles south of Shreveport LA. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU6).

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 444...WW 445...

AVIATION...A few severe thunderstorms with hail surface and aloft to
0.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 450. Mean storm motion vector
23035.

...Guyer

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