

000 

WWUS20 KWNS 301739

SEL7

SPC WW 301739

KSZ000-MOZ000-010100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 697

NWS STORM PREDICTION CENTER NORMAN OK

1240 PM CDT SUN SEP 30 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EASTERN KANSAS

       WESTERN MISSOURI



EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 1240 PM UNTIL

800 PM CDT.



HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80

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



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 115

STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES SOUTH

SOUTHEAST OF CHANUTE KANSAS TO 60 MILES NORTH NORTHEAST OF SAINT

JOSEPH MISSOURI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).



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.



DISCUSSION...FAST-MOVING BROKEN SQUALL LINE EXPECTED TO FORM AHEAD

OF STRONG COLD FRONT SURGING EAST THIS AFTERNOON. ENVIRONMENT AHEAD

OF THE LINE OF STORMS SHOULD BECOME INCREASINGLY FAVORABLE FOR

SEVERE STORMS WITH HIGH WINDS AND HAIL GIVEN NWD/NEWD SURGE OF MID

60S DEWPOINTS AND DEVELOPMENT OF MODEST DIURNAL INSTABILITY.

STRENGTHENING WIND FIELDS AND FORCING SHOULD SUPPORT LINE SEGMENTS

AND PERHAPS A FEW SUPERCELLS SPREADING RAPIDLY NEWD AT UP TO 50KT

WHILE ENTIRE LINE/FRONT ADVANCES EWD AT ABOUT 30-40KT.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70 KNOTS.

A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM MOTION

VECTOR 25040.





...CARBIN

