

920 

WWUS20 KWNS 232013

SEL7

SPC WW 232013

KSZ000-NEZ000-240400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 87

NWS STORM PREDICTION CENTER NORMAN OK

305 PM CDT WED APR 23 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  WESTERN...NORTHERN AND CENTRAL KANSAS

  CENTRAL AND EAST CENTRAL NEBRASKA



* EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 305 PM

  UNTIL 1100 PM CDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED DAMAGING WIND GUSTS TO 70 MPH LIKELY

  SCATTERED LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 75

STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES NORTHWEST OF

COLUMBUS NEBRASKA TO 75 MILES SOUTH OF HILL CITY KANSAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU7).



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...SFC-BASED TSTMS EXPECTED TO FORM IN THE NEXT HOUR OR

TWO ALONG/NEAR COLD FRONT ARCING SSW FROM CNTRL NEB INTO N CNTRL/NW

KS AS SFC HEATING AND MODEST MOISTURE RETURN FURTHER DESTABILIZE

REGION. ANTICIPATED THERMODYNAMIC ENVIRONMENT...ALONG WITH 40-45 KT

SWLY 700-700 MB FLOW AHEAD OF WEAK IMPULSE APPROACHING FROM THE

CNTRL HIGH PLNS...MAY PROMOTE RELATIVELY HIGH-BASED STORMS WITH A

POTENTIAL FOR BOTH SVR HAIL AND DMGG WIND. THE STORMS MAY GROW INTO

A CLUSTER/SQLN THIS EVE THAT STRADDLES THE KS-NEB BORDER. THIS MCS

COULD POSE A CONTINUED RISK FOR SVR WEATHER AS IT MOVES GENERALLY

ESE THROUGH LATER TNGT.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 22525.





...CORFIDI

