Monday, March 27, 2017

SPC Severe Thunderstorm Watch 90

WW 90 SEVERE TSTM AL AR LA MS 271855Z - 280200Z
WW 0090 Image

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 90
NWS Storm Prediction Center Norman OK
155 PM CDT Mon Mar 27 2017

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Northern and central Alabama
  Far southeast Arkansas
  Far northeast Louisiana
  Central Mississippi

* Effective this Monday afternoon and evening from 155 PM until
  900 PM CDT.

* Primary threats include...
  Scattered large hail and isolated very large hail events to 2.5
    inches in diameter possible
  Scattered damaging wind gusts to 70 mph possible
  A tornado or two possible

SUMMARY...Severe thunderstorms will continue to increase from
northeast Louisiana and central Mississippi into western and
northern Alabama. Steep lapse rates and moderate vertical shear will
support the potential for well-organized storms including supercells
capable of large hail, damaging winds and possibly a tornado (mainly
across northern Alabama).

The severe thunderstorm watch area is approximately along and 60
statute miles north and south of a line from 30 miles northeast of
Gadsden AL to 50 miles south southwest of Greenville MS. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU0).

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 89...

AVIATION...A few severe thunderstorms with hail surface and aloft to
2.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
24030.

...Guyer

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from SPC Forecast Products http://ift.tt/GzSLlF

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