Sunday, December 27, 2015

SPC Severe Thunderstorm Watch 570

WW 570 SEVERE TSTM TX 270255Z - 271000Z
WW 0570 Image

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 570
NWS STORM PREDICTION CENTER NORMAN OK
855 PM CST SAT DEC 26 2015

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
  THE EDWARDS PLATEAU OF TEXAS

* EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 855 PM
  UNTIL 400 AM CST.

* 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...STRONG/SEVERE THUNDERSTORMS WILL DEVELOP AND SPREAD
EASTWARD ACROSS THE EDWARDS PLATEAU THROUGH THE OVERNIGHT HOURS. 
THE MAIN RISKS WILL BE LARGE HAIL AND DAMAGING WINDS...THOUGH A
BRIEF TORNADO CANNOT BE RULED OUT WITH STORMS BEFORE THEY MOVE NORTH
OF A COLD FRONT SAGGING SOUTHWARD ACROSS CENTRAL TEXAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70
STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES NORTH
NORTHWEST OF JUNCTION TEXAS TO 15 MILES SOUTH SOUTHEAST OF DEL
RIO TEXAS.  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.

&&

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 450. MEAN STORM
MOTION VECTOR 22040.


...THOMPSON

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

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