

347 

WWUS20 KWNS 202009

SEL9

SPC WW 202009

COZ000-KSZ000-NEZ000-210400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 359

NWS STORM PREDICTION CENTER NORMAN OK

310 PM CDT SUN JUN 20 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       PARTS OF NORTHEAST COLORADO

       LARGE PART OF NORTHERN KANSAS

       PARTS OF SOUTHERN NEBRASKA



EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 310 PM UNTIL

1100 PM CDT.



TORNADOES...HAIL TO 4 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 25 MILES WEST NORTHWEST OF

BURLINGTON COLORADO TO 40 MILES EAST OF CONCORDIA KANSAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU9).



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 356...WW 357...WW 358...



DISCUSSION...WITH EXTREME INSTABILITY IN PLACE...MLCAPES AOA 4000

J/KG...AND RAPIDLY DISSIPATING CINH...SEVERE STORMS EXPECTED TO

DEVELOP ACROSS THE WATCH VICINITY OF E/W BOUNDARY.  VEERING SHEAR

PROFILES ALONG AND N OF BOUNDARY SUPPORT SUPERCELLS WHICH WILL

INCLUDES VERY LARGE HAIL AND AT LEAST AN ISOLATED TORNADO THREAT.

STORMS WILL GROW UPSCALE BY THIS EVENING WITH AN INCREASING THREAT

OF  ORGANIZED WIND DAMAGE DEVELOP EWD ACROSS NRN KS/SRN NEB.



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

SURFACE AND ALOFT TO 4 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

650. MEAN STORM MOTION VECTOR 25025.





...HALES

