

231 

WWUS20 KWNS 222027

SEL3

SPC WW 222027

COZ000-KSZ000-NEZ000-230400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 473

NWS STORM PREDICTION CENTER NORMAN OK

325 PM CDT FRI AUG 22 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  NORTHEAST COLORADO

  NORTHWEST KANSAS

  SOUTHWEST AND SOUTH-CENTRAL NEBRASKA



* EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 325 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 70

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 45 MILES SOUTH

SOUTHWEST OF AKRON COLORADO TO 5 MILES EAST SOUTHEAST OF GRAND

ISLAND NEBRASKA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).



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.



&&



DISCUSSION...THUNDERSTORMS ARE EXPECTED TO INCREASE IN COVERAGE AND

INTENSITY TO THE NORTH OF A SURFACE LOW AND ASSOCIATED STATIONARY

FRONT AS DEEP-LAYER ASCENT IS ENHANCED BY THE APPROACH OF A

SHORT-WAVE TROUGH. THE COMBINATION OF A MOIST AND MODERATELY

UNSTABLE AIR MASS AND VERTICALLY VEERING WIND PROFILE WILL PROMOTE

ORGANIZED STORM MODES INCLUDING SUPERCELLS CAPABLE OF LARGE HAIL AND

PERHAPS A TORNADO OR TWO. WITH TIME...STORMS MAY GROW UPSCALE INTO A

NORTHEAST-MOVING BOWING MCS CAPABLE OF DAMAGING WINDS AND HAIL.



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 23025.





...MEAD



848 

WWUS20 KWNS 222027

SEL3

SPC WW 222027

COZ000-KSZ000-NEZ000-230400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 473

NWS STORM PREDICTION CENTER NORMAN OK

325 PM CDT FRI AUG 22 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  NORTHEAST COLORADO

  NORTHWEST KANSAS

  SOUTHWEST AND SOUTH-CENTRAL NEBRASKA



* EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 325 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 70

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 45 MILES SOUTH

SOUTHWEST OF AKRON COLORADO TO 5 MILES EAST SOUTHEAST OF GRAND

ISLAND NEBRASKA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).



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.



&&



DISCUSSION...THUNDERSTORMS ARE EXPECTED TO INCREASE IN COVERAGE AND

INTENSITY TO THE NORTH OF A SURFACE LOW AND ASSOCIATED STATIONARY

FRONT AS DEEP-LAYER ASCENT IS ENHANCED BY THE APPROACH OF A

SHORT-WAVE TROUGH. THE COMBINATION OF A MOIST AND MODERATELY

UNSTABLE AIR MASS AND VERTICALLY VEERING WIND PROFILE WILL PROMOTE

ORGANIZED STORM MODES INCLUDING SUPERCELLS CAPABLE OF LARGE HAIL AND

PERHAPS A TORNADO OR TWO. WITH TIME...STORMS MAY GROW UPSCALE INTO A

NORTHEAST-MOVING BOWING MCS CAPABLE OF DAMAGING WINDS AND HAIL.



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 23025.





...MEAD

