

981 

WWUS20 KWNS 202300

SEL7

SPC WW 202300

KSZ000-NEZ000-210700-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 607

NWS STORM PREDICTION CENTER NORMAN OK

555 PM CDT MON JUL 20 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL AND WESTERN KANSAS

       SOUTHWEST NEBRASKA



EFFECTIVE THIS MONDAY AFTERNOON AND TUESDAY MORNING FROM 555 PM

UNTIL 200 AM CDT.



TORNADOES...HAIL TO 2.5 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 95 STATUTE

MILES EAST AND WEST OF A LINE FROM 25 MILES NORTH OF MCCOOK

NEBRASKA TO 45 MILES SOUTH SOUTHEAST OF WICHITA KANSAS.  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.



OTHER WATCH INFORMATION...CONTINUE...WW 606...



DISCUSSION...TSTMS/SUPERCELLS EXPECTED TO FORM ALONG AND NE OF NW-SE

STNRY FRONT OVER CNTRL KS AS LARGE SCALE ASCENT PERSISTS/POSSIBLY

INCREASES IN ASSOCIATION WITH A SERIES OF IMPULSES MOVING SEWD

WITHIN AMPLIFYING LARGER SCALE TROUGH.  OTHER STORMS/SUPERCELLS

EXPECTED TO CONTINUE MOVING GENERALLY S OR SSE ALONG AND BEHIND COLD

FRONT NOW OVER WRN NEB.



INCREASINGLY MOIST LOW LVL ENVIRONMENT INVOF STNRY FRONT...AND

STRENGTHENING LLJ SUGGEST POTENTIAL FOR TORNADOES...GIVEN DISCRETE

STORMS.  OTHERWISE...COMBINATION OF INCREASING LARGE SCALE ASCENT...

MOISTURE INFLOW...AND MDT SSWLY LLJ SHOULD SUPPORT EVENTUAL

EVOLUTION INTO A LARGE...FORWARD-PROPAGATING MCS.  EMBEDDED BOWING

SEGMENTS/SUPERCELLS MAY POSE A THREAT FOR SVR WIND/HAIL AND PERHAPS

ISOLD TORNADOES INTO LATE TONIGHT/EARLY TUESDAY.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

550. MEAN STORM MOTION VECTOR 33030.





...CORFIDI

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