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213 

WWUS20 KWNS 032013

SEL9

SPC WW 032013

NEZ000-040400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 209

NWS STORM PREDICTION CENTER NORMAN OK

210 PM MDT TUE JUN 3 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* TORNADO WATCH FOR PORTIONS OF

  WESTERN NEBRASKA



* EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 210 PM UNTIL

  1000 PM MDT.



* PRIMARY THREATS INCLUDE...

  A COUPLE TORNADOES POSSIBLE

  ISOLATED SIGNIFICANT DAMAGING WIND GUSTS TO 80 MPH POSSIBLE

  ISOLATED VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 25 MILES WEST NORTHWEST OF

SCOTTSBLUFF NEBRASKA TO 45 MILES EAST OF MULLEN NEBRASKA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU9).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND 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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 207...WW 208...



DISCUSSION...STRONG TO LOCALLY EXTREME INSTABILITY BENEATH GRADUALLY

ERODING CAP SHOULD FUEL ISOLATED INTENSE TSTM DEVELOPMENT ACROSS

PARTS OF WRN NEB OVER THE NEXT SEVERAL HOURS. REMAINING INHIBITION

APPEARS TO BE ERODING AS LARGE SCALE ASCENT SPREADS EAST FROM THE

ROCKIES/HIGH PLAINS AND STRONG SFC HEATING RESULTS IN A DEEPENING

AND WELL-MIXED BOUNDARY LAYER. STRENGTHENING LOW LEVEL SELY FLOW AND

A VEERING PROFILE THROUGH THE STORM UPDRAFT LAYER SHOULD CONTRIBUTE

TO MESOCYCLONE DEVELOPMENT AND PERSISTENCE WITH A COUPLE OF

TORNADOES POSSIBLE. AMOUNT OF STORM COVERAGE STILL SOMEWHAT IN

QUESTION GIVEN MAGNITUDE OF CAPPING AND WARMER AIR ALOFT.

HOWEVER...CONDITIONAL THREAT IS SUFFICIENT ENOUGH TO WARRANT TORNADO

WATCH AT THIS TIME.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 28035.





...CARBIN

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