

424 

WWUS20 KWNS 092109

SEL0

SPC WW 092109

COZ000-KSZ000-NEZ000-100400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 500

NWS STORM PREDICTION CENTER NORMAN OK

405 PM CDT TUE SEP 9 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  FAR EASTERN COLORADO

  NORTHWEST KANSAS

  SOUTHWEST NEBRASKA



* EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 405 PM UNTIL

  1100 PM CDT.



* PRIMARY THREATS INCLUDE...

  ISOLATED VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  A TORNADO OR TWO POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 90

STATUTE MILES EAST AND WEST OF A LINE FROM 15 MILES NORTHWEST OF

NORTH PLATTE NEBRASKA TO 65 MILES SOUTHEAST OF GOODLAND KANSAS.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU0).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



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 499...



DISCUSSION...TSTMS EXPECTED TO INCREASE ALONG AND E OF SE-MOVING

COLD FRONT IN NE CO...AND ALONG W-E BOUNDARY STRADDLING THE KS-NEB

BORDER...AND POSSIBLY ALONG N-S LEE TROUGH IN WRN KS AS SYNOPTIC

SCALE LOW DEEPENS/CONSOLIDATES OVER REGION. AREA SHEAR/BUOYANCY

ENVIRONMENTS APPEAR FAVORABLE FOR SUSTAINED STORMS/POSSIBLE

SUPERCELLS WITH SVR HAIL/WIND...ESPECIALLY ALONG AND N OF KS-NEB

BORDER BOUNDARY...WHERE SOMEWHAT BACKED LOW-LVL FLOW WILL EXIST AND

MAY ENHANCE POTENTIAL FOR LOW-LVL STORM ROTATION.



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 24025.





...CORFIDI



542 

WWUS20 KWNS 092109

SEL0

SPC WW 092109

COZ000-KSZ000-NEZ000-100400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 500

NWS STORM PREDICTION CENTER NORMAN OK

405 PM CDT TUE SEP 9 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  FAR EASTERN COLORADO

  NORTHWEST KANSAS

  SOUTHWEST NEBRASKA



* EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 405 PM UNTIL

  1100 PM CDT.



* PRIMARY THREATS INCLUDE...

  ISOLATED VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  A TORNADO OR TWO POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 90

STATUTE MILES EAST AND WEST OF A LINE FROM 15 MILES NORTHWEST OF

NORTH PLATTE NEBRASKA TO 65 MILES SOUTHEAST OF GOODLAND KANSAS.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU0).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



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 499...



DISCUSSION...TSTMS EXPECTED TO INCREASE ALONG AND E OF SE-MOVING

COLD FRONT IN NE CO...AND ALONG W-E BOUNDARY STRADDLING THE KS-NEB

BORDER...AND POSSIBLY ALONG N-S LEE TROUGH IN WRN KS AS SYNOPTIC

SCALE LOW DEEPENS/CONSOLIDATES OVER REGION. AREA SHEAR/BUOYANCY

ENVIRONMENTS APPEAR FAVORABLE FOR SUSTAINED STORMS/POSSIBLE

SUPERCELLS WITH SVR HAIL/WIND...ESPECIALLY ALONG AND N OF KS-NEB

BORDER BOUNDARY...WHERE SOMEWHAT BACKED LOW-LVL FLOW WILL EXIST AND

MAY ENHANCE POTENTIAL FOR LOW-LVL STORM ROTATION.



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 24025.





...CORFIDI

