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WWUS20 KWNS 270307

SEL3

SPC WW 270307

COZ000-KSZ000-NEZ000-NMZ000-OKZ000-TXZ000-271000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 193

NWS STORM PREDICTION CENTER NORMAN OK

905 PM MDT THU APR 26 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EASTERN COLORADO

       WESTERN KANSAS

       FAR SOUTHWEST NEBRASKA

       FAR NORTHEAST NEW MEXICO

       THE WESTERN AND CENTRAL OKLAHOMA

       THE NORTHERN TEXAS PANHANDLE



EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 905 PM

UNTIL 400 AM MDT.



HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70

STATUTE MILES EAST AND WEST OF A LINE FROM 55 MILES NORTH OF

AKRON COLORADO TO 30 MILES SOUTHEAST OF DALHART TEXAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU3).



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 192...



DISCUSSION...CLUSTERS/BANDS OF TSTMS EXPECTED TO FORM OVER FAR NE NM

AND S CNTRL/SE CO LATER THIS EVE AS STRONG HEIGHT FALLS SWEEP NEWD

AHEAD OF POTENT FOUR CORNERS UPR VORT.  LOW LVL MOISTURE WILL

CONTINUE TO INCREASE IN WW AREA AS APPROACH OF VORT MAINTAINS CO LEE

LOW.  LOW LVL LAPSE RATES HAVE BEEN SOMEWHAT DIMINISHED BY

CONVECTION THAT OCCURRED OVER THE TX/OK PANHANDLES AND SE CO/SW KS

EARLIER TNGT...AND NOCTURNAL COOLING WILL LIMIT SFC-BASED BUOYANCY.

BUT THESE NEGATIVE FACTORS FOR CONVECTIVE DEVELOPMENT MAY BE OFFSET

BY LOW LVL MOISTURE DEPOSITED BY THE STORMS...AND BY THE CONTINUING

PRESENCE OF UPSLOPE COMPONENT TO THE FLOW.  SETUP MAY YIELD A FEW

EMBEDDED SUSTAINED STORMS/ROTATING STRUCTURES CAPABLE OF DOWNWARD

MOMENTUM TRANSPORT/HIGH WIND...AND POSSIBLY A  TORNADO...IN ADDITION

TO HAIL.



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 450. MEAN STORM

MOTION VECTOR 20045.





...CORFIDI

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