

300 

WWUS20 KWNS 092248

SEL8

SPC WW 092248

COZ000-KSZ000-NEZ000-100600-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 408

NWS STORM PREDICTION CENTER NORMAN OK

445 PM MDT WED JUL 9 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  NORTHEAST COLORADO

  NORTHWEST KANSAS

  WESTERN...CENTRAL...AND NORTHERN NEBRASKA



* EFFECTIVE THIS WEDNESDAY AFTERNOON FROM 445 PM UNTIL MIDNIGHT

  MDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED DAMAGING WIND GUSTS TO 70 MPH LIKELY

  SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2

    INCHES IN DIAMETER POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 150

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

MULLEN NEBRASKA TO 55 MILES WEST SOUTHWEST OF HILL CITY KANSAS.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU8).



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 407...



DISCUSSION...TSTMS...INCLUDING OCCASIONAL SUPERCELLS WITH SVR

HAIL...EXPECTED TO CONTINUE FORMING NE OF FRONT STALLED NW-SE ACROSS

CNTRL NEB. OTHER STORMS...INCLUDING SUPERCELLS...ALSO MAY FORM LATER

THIS EVE CLOSER TO THE BOUNDARY IN CNTRL NEB IN RESPONSE TO

CONTINUED LOW-LVL DESTABILIZATION AND TO ASCENT WITH CNTRL PLNS UPR

IMPULSE. THESE STORMS ALSO MAY POSE A RISK FOR LARGE HAIL...DMGG

WIND...AND PERHAPS A TORNADO GIVEN DEGREE OF LOW-LVL BUOYANCY AND

SIZABLE/CURVED HODOGRAPHS. FINALLY...OTHER STORMS/CLUSTERS EXPECTED

TO CONTINUE FORMING THROUGH THE EVE IN WEAKLY CONFLUENT/SLIGHTLY

UPSLOPE FLOW OVER NE CO/WRN NEB.

EXPECTED NOCTURNAL STRENGTHENING OF MDT...SLY LLJ...AND CONTINUED SE

MOVEMENT OF UPR IMPULSE...SUGGEST POTENTIAL FOR UPSCALE GROWTH INTO

AN MCS OR TWO...WITH AN ATTENDANT RISK FOR LOCALLY DMGG WIND/SVR

HAIL.



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 500. MEAN STORM

MOTION VECTOR 31025.





...CORFIDI

