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WWUS20 KWNS 150638

SEL5

SPC WW 150638

KSZ000-MOZ000-OKZ000-151100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 175

NWS STORM PREDICTION CENTER NORMAN OK

135 AM CDT SUN APR 15 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       EASTERN KANSAS

       EXTREME NORTHWEST MISSOURI

       CENTRAL AND NORTH CENTRAL OKLAHOMA



EFFECTIVE THIS SUNDAY MORNING FROM 135 AM UNTIL 600 AM CDT.



TORNADOES...HAIL TO 2 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 50 STATUTE

MILES EAST AND WEST OF A LINE FROM 40 MILES NORTHEAST OF FALLS

CITY NEBRASKA TO 45 MILES SOUTH SOUTHEAST OF CLINTON OKLAHOMA.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU5).



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.



OTHER WATCH INFORMATION...THIS TORNADO WATCH REPLACES TORNADO

WATCH NUMBER 170. WATCH NUMBER 170 WILL NOT BE IN EFFECT AFTER

135 AM CDT. CONTINUE...WW 171...WW 173...WW 174...



DISCUSSION...BROKEN LINE OF STORMS ALONG THE DRYLINE/COLD FRONT WILL

CONTINUE TO SPREAD EWD THROUGH THE OVERNIGHT HOURS.  A STRONG

VERTICAL SHEAR ENVIRONMENT REMAINS IN PLACE WITH SURFACE-BASED

INSTABILITY E OF THE ONGOING STORMS...THUS A RISK OF

SUPERCELLS/TORNADOES IS EXPECTED TO PERSIST FOR ANOTHER FEW HOURS.

OTHERWISE...LARGE HAIL AND DAMAGING WINDS CAN BE EXPECTED WITH THE

STRONGER STORMS IN THE BAND.



AVIATION...TORNADOES AND 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

500. MEAN STORM MOTION VECTOR 25045.





...THOMPSON

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