

684 

WWUS20 KWNS 150342

SEL3

SPC WW 150342

KSZ000-NEZ000-151000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 663

NWS STORM PREDICTION CENTER NORMAN OK

1040 PM CDT TUE SEP 14 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHERN AND WESTERN KANSAS

       SOUTH CENTRAL NEBRASKA



EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 1040 PM

UNTIL 500 AM CDT.



HAIL TO 2 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 80

STATUTE MILES EAST AND WEST OF A LINE FROM 10 MILES NORTH

NORTHWEST OF KEARNEY NEBRASKA TO 40 MILES EAST OF GARDEN CITY

KANSAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).



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 661...WW 662...



DISCUSSION...NW KS SUPERCELL COMPLEX/MCS EXPECTED TO MOVE GENERALLY

SEWD...WITH EMBEDDED SUPERCELLS OCCASIONALLY MOVING MORE SSEWD.

INCREASING LOW LVL MOISTURE WITH SWD EXTENT MAY COMPENSATE FOR

SOMEWHAT WEAKER MID LVL FLOW TO SUPPORT CONTINUED SUPERCELL

DEVELOPMENT.  OTHER STORMS MAY FORM IN STRENGTHENING WAA ZONE E OF

COMPLEX ACROSS S CNTRL NEB.  WHILE DMGG WIND AND SVR HAIL SHOULD BE

THE PRIMARY SVR THREATS...A TORNADO OR TWO CANNOT BE RULED OUT GIVEN

MODERATE/MOIST LLJ.



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

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 31025.





...CORFIDI

