

194 

WWUS20 KWNS 172153

SEL3

SPC WW 172153

NEZ000-SDZ000-180400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 313

NWS STORM PREDICTION CENTER NORMAN OK

355 PM MDT TUE JUN 17 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* TORNADO WATCH FOR PORTIONS OF

  NORTH CENTRAL NEBRASKA

  SOUTH CENTRAL SOUTH DAKOTA



* EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 355 PM UNTIL

  1000 PM MDT.



* PRIMARY THREATS INCLUDE...

  A COUPLE TORNADOES POSSIBLE

  SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 3

    INCHES IN DIAMETER POSSIBLE

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 70 MILES NORTHWEST OF MULLEN

NEBRASKA TO 35 MILES EAST NORTHEAST OF AINSWORTH NEBRASKA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU3).



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 311...



DISCUSSION...ISOLATED SUPERCELL DEVELOPMENT IS EXPECTED SOON ALONG A

STALLED BOUNDARY NEAR THE SD/NE BORDER W OF VALENTINE.  STEEP LAPSE

RATES AND LARGE CAPE ARE PRESENT IN THE MOIST ELY FLOW ACROSS NRN

NEB...WHERE DEEP-LAYER SHEAR IS SUFFICIENT FOR SUPERCELLS.  EXPECT

SLOW-MOVING SUPERCELLS THIS AFTERNOON/EVENING CAPABLE OF PRODUCING

VERY LARGE HAIL AND A COUPLE TORNADOES.



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

SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

550. MEAN STORM MOTION VECTOR 28015.





...THOMPSON

