

605 

WWUS20 KWNS 180125

SEL7

SPC WW 180125

KSZ000-MOZ000-180800-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 497

NWS STORM PREDICTION CENTER NORMAN OK

820 PM CDT FRI JUN 17 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL AND EASTERN KANSAS

       WESTERN AND CENTRAL MISSOURI



EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 820 PM

UNTIL 300 AM CDT.



HAIL TO 3 INCHES 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 80

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 25 MILES SOUTH OF

RUSSELL KANSAS TO 65 MILES NORTHEAST OF SPRINGFIELD 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.



OTHER WATCH INFORMATION...CONTINUE...WW 492...WW 493...WW

494...WW 495...WW 496...



DISCUSSION...TSTMS JUST FORMING IN CNTRL KS EXPECTED TO INCREASE

MARKEDLY IN COVERAGE/STRENGTH OVER THE NEXT FEW HOURS AS

WAA/MOISTURE INFLOW FOCUS ALONG/ATOP WEAK WNW/ESE OUTFLOW BOUNDARY

ACROSS REGION.  VERY UNSTABLE AIR AND VEERING/INTENSIFYING LLJ

SUGGEST THAT STORMS WILL FAIRLY QUICKLY EVOLVE INTO ONE OR TWO LARGE

CLUSTERS.  THESE SHOULD MOVE/DEVELOP GENERALLY ESE WITH AN ATTENDANT

THREAT FOR BOWING SEGMENTS WITH HIGH WIND AND...ESPECIALLY THROUGH

MIDNIGHT...LARGE HAIL.  SOME THREAT ALSO WILL EXIST FOR

TORNADOES...MAINLY IN S CNTRL KS THROUGH MID TO PERHAPS LATE

EVE...WHERE ONE OR TWO SEMI-DISCRETE STORMS MAY DEVELOP IN NE

QUADRANT OF S CNTRL KS THERMALLY-ENHANCED SFC LOW /WHERE ICT VWP

SHOWS STRONGLY-BACKED LOW LVL FLOW/.  IF THIS SCENARIO DOES INDEED

MATERIALIZE...PARTS OF WW MAY REQUIRE UPGRADE TO TORNADO LATER THIS

EVE.



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

TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 600. MEAN STORM

MOTION VECTOR 25025.





...CORFIDI

