WATCHES: Severe Thunderstorm Watch Number 193

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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