WWUS20 KWNS 121848
SEL7
SPC WW 121848
COZ000-KSZ000-NEZ000-130200-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 157
NWS STORM PREDICTION CENTER NORMAN OK
1250 PM MDT THU APR 12 2012

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF 

       EASTERN COLORADO
       WESTERN KANSAS
       SOUTHWEST NEBRASKA

EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 1250 PM UNTIL
800 PM MDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE
MILES EAST AND WEST OF A LINE FROM 50 MILES NORTHWEST OF IMPERIAL
NEBRASKA TO 45 MILES EAST SOUTHEAST OF LAMAR COLORADO.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU7).

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.

DISCUSSION...THUNDERSTORMS ARE EXPECTED TO INTENSIFY THIS AFTERNOON
OVER EASTERN CO AND TRACK EASTWARD INTO WESTERN KS/SOUTHWEST NEB. 
THIS REGION IS WITHIN A CORRIDOR OF MODERATE CAPE AND STEEP LAPSE
RATES...ALONG WITH FAVORABLE LOW LEVEL AND DEEP LAYER SHEAR.  STORMS
ARE FORECAST TO QUICKLY BECOME SUPERCELLULAR WITH A RISK OF VERY
LARGE HAIL AND A FEW TORNADOES.  INCREASING WIND FIELDS THROUGH THE
LATE AFTERNOON AND EVENING WOULD SUPPORT A RISK OF STRONG 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
450. MEAN STORM MOTION VECTOR 27030.


...HART