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WWUS20 KWNS 221636

SEL2

SPC WW 221636

KSZ000-MOZ000-NEZ000-230000-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 162

NWS STORM PREDICTION CENTER NORMAN OK

1140 AM CDT SUN APR 22 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHEAST KANSAS

       EXTREME NORTHWEST MISSOURI

       SOUTHEAST NEBRASKA



EFFECTIVE THIS SUNDAY MORNING AND EVENING FROM 1140 AM UNTIL 700

PM 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 75 STATUTE

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

NEBRASKA TO 25 MILES EAST OF MANHATTAN KANSAS.  FOR A COMPLETE

DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE

(WOUS64 KWNS WOU2).



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...ENVIRONMENT EXPECTED TO BECOME INCREASINGLY SUPPORTIVE

OF RELATIVELY LOW-TOPPED ROTATING STORMS ACROSS FROM SOUTHEAST

NEB/NORTHEAST KS EAST TO EXTREME NORTHWEST MO THROUGH THE AFTERNOON

AS DEEP-LAYER CYCLONE TRANSITIONS ENEWD ACROSS THE REGION. POCKETS

OF STRONGER SURFACE HEATING WITHIN SYSTEM DRY SLOT WILL CONTRIBUTE

TO CONTINUED DESTABILIZATION AND INCREASING STORM COVERAGE AND

INTENSITY. IN ADDITION TO COOLING ALOFT AND ADEQUATE DEEP-LAYER

SHEAR FOR HAIL STORMS...ENHANCED LOW LEVEL SHEAR NEAR THE LOW...AND

UPDRAFT STRETCHING IN AREAS WITH GREATER LOW-LEVEL CAPE SHOULD LEAD

TO A GREATER CHANCE FOR SOME TORNADIC CELLS.



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

400. MEAN STORM MOTION VECTOR 20035.





...CARBIN/CORFIDI

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