

000 

WWUS20 KWNS 210245

SEL7

SPC WW 210245

KSZ000-210900-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 627

NWS STORM PREDICTION CENTER NORMAN OK

945 PM CDT MON AUG 20 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL AND SOUTHERN KANSAS



EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 945 PM UNTIL

400 AM CDT.



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 105

STATUTE MILES EAST AND WEST OF A LINE FROM 5 MILES WEST NORTHWEST

OF SALINA KANSAS TO 20 MILES SOUTH OF MEDICINE LODGE KANSAS.  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.



OTHER WATCH INFORMATION...THIS SEVERE THUNDERSTORM WATCH REPLACES

SEVERE THUNDERSTORM WATCH NUMBER 622. WATCH NUMBER 622 WILL NOT

BE IN EFFECT AFTER 945 PM CDT. CONTINUE...WW 624...WW 625...WW

626...



DISCUSSION...WIDELY SCTD INTENSE TSTMS/MARGINAL SUPERCELLS ARE

PERSISTING ACROSS CNTRL AND SRN KS THIS EVENING DESPITE NOCTURNAL

INCREASE IN CIN.  ACTIVITY IS LIKELY BEING FED BY BROAD AND VERY

MOIST 30 KT SSWLY LLJ.  ISOLATED POCKETS OF STRONG TO SVR STORMS MAY

CONTINUE TO DEVELOP/REFORM OVER THE REGION THROUGH EARLY TUESDAY AS

UPLIFT FOCUSES ON STORM OUTFLOW.  AREA THERMODYNAMIC PROFILES /PER

EVENING RAOBS/ APPEAR SUPPORTIVE OF STRONG DOWNDRAFTS AND SVR HAIL

GIVEN PRESENCE OF A SUSTAINED STORM.



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 500. MEAN STORM

MOTION VECTOR 31020.





...CORFIDI

