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WWUS20 KWNS 202031

SEL0

SPC WW 202031

COZ000-NEZ000-WYZ000-210300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 160

NWS STORM PREDICTION CENTER NORMAN OK

235 PM MDT TUE MAY 20 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  NORTHEAST COLORADO

  NEBRASKA PANHANDLE

  SOUTHEAST WYOMING



* EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 235 PM UNTIL

  900 PM MDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2

    INCHES IN DIAMETER POSSIBLE

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  A TORNADO OR TWO POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 65

STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES NORTHEAST OF

DOUGLAS WYOMING TO 20 MILES WEST SOUTHWEST OF LIMON COLORADO.

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.



&&



DISCUSSION...ISOLATED THUNDERSTORMS ARE FORMING ON THE FRONT RANGE

FROM SOUTHEAST WY INTO NORTH CENTRAL CO.  A FEW OF THESE STORMS ARE

EXPECTED TO BECOME SEVERE AND TRACK EASTWARD ACROSS THE WATCH AREA

THIS AFTERNOON AND EVENING.  SUFFICIENT DEEP LAYER VERTICAL SHEAR

AND INSTABILITY WILL POSE RISK OF SUPERCELLS CAPABLE OF PRIMARILY

LARGE 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 450. MEAN STORM

MOTION VECTOR 27030.





...HART

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