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WWUS20 KWNS 141623

SEL3

SPC WW 141623

ALZ000-MSZ000-TNZ000-150000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 153

NWS STORM PREDICTION CENTER NORMAN OK

1125 AM CDT WED MAY 14 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  NORTHERN ALABAMA

  FAR NORTHEAST MISSISSIPPI

  WESTERN AND MIDDLE TENNESSEE



* EFFECTIVE THIS WEDNESDAY MORNING AND EVENING FROM 1125 AM UNTIL

  700 PM CDT.



* PRIMARY THREATS INCLUDE...

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  ISOLATED LARGE HAIL EVENTS TO 1 INCH IN DIAMETER POSSIBLE

  A TORNADO OR TWO POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80

STATUTE MILES EAST AND WEST OF A LINE FROM 15 MILES SOUTH

SOUTHEAST OF MUSCLE SHOALS ALABAMA TO 45 MILES NORTHEAST OF

NASHVILLE TENNESSEE.  FOR A COMPLETE DEPICTION OF THE WATCH SEE

THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).



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.



&&



DISCUSSION...THUNDERSTORMS ARE EXPECTED TO INCREASE IN COVERAGE AND

INTENSITY THIS AFTERNOON AHEAD OF A SHORT-WAVE TROUGH AND ASSOCIATED

SURFACE LOW TRACKING NORTHEAST ACROSS THE REGION. THE COMBINATION OF

A MOIST AND MODERATELY UNSTABLE AIR MASS WITH A VERTICALLY VEERING

WIND PROFILE AND 40-45 KT OF DEEP-LAYER SHEAR INDICATE A RISK FOR

SUPERCELLS AND BOWING STRUCTURES CAPABLE OF DAMAGING WIND GUSTS AND

PERHAPS A TORNADO OR TWO.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.

A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM MOTION

VECTOR 22030.





...MEAD

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