

515 

WWUS20 KWNS 300605

SEL1

SPC WW 300605

NEZ000-301300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 371

NWS STORM PREDICTION CENTER NORMAN OK

105 AM CDT MON JUN 30 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  CENTRAL NEBRASKA



* EFFECTIVE THIS MONDAY MORNING FROM 105 AM UNTIL 800 AM CDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 3

    INCHES IN DIAMETER POSSIBLE

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 25 MILES NORTH

NORTHWEST OF NORTH PLATTE NEBRASKA TO 40 MILES SOUTH OF NORFOLK

NEBRASKA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).



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 369...WW 370...



DISCUSSION...TWO PRIMARY/INITIAL AREAS OF STG-SVR TSTMS ARE

EVIDENT...MOVING EWD FROM SWRN NEB AND NEWER CONVECTION NW-NNE BBW

THAT MAY HAVE MORE SUSTAINED/INTENSE RISK OF SVR THROUGH REMAINDER

PRE-DAWN HOURS.  EACH IS EXPECTED TO MOVE EWD INTO AIR MASS

CHARACTERIZED BY RICH LOW-LEVEL MOISTURE AND VERY STEEP

DEEP-TROPOSPHERIC LAPSE RATES ABOVE SHALLOW-NEAR-SFC STABLE

LAYER...AND 3000-4000 K/KG MUCAPE.  FOR ADDITIONAL DETAILS ON SRN

TSTM AREA REF SPC MESOSCALE DISCUSSION 1207.  PER COORD W/WFO

OAX...NEW WW MAY BE REQUIRED LATER THIS MORNING AND FARTHER E IN ERN

NEB AS CONVECTIVE/DESTABILIZATION TRENDS WARRANT.



AVIATION...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 600. MEAN STORM

MOTION VECTOR 27025.





...EDWARDS

