

571 

WWUS20 KWNS 040123

SEL1

SPC WW 040123

WIZ000-040700-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 491

NWS STORM PREDICTION CENTER NORMAN OK

825 PM CDT WED SEP 3 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  NORTHWEST WISCONSIN



* EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 825 PM

  UNTIL 200 AM CDT.



* PRIMARY THREATS INCLUDE...

  ISOLATED VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 45

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 70 MILES WEST

NORTHWEST OF EAU CLAIRE WISCONSIN TO 65 MILES EAST NORTHEAST OF

EAU CLAIRE WISCONSIN.  FOR A COMPLETE DEPICTION OF THE WATCH SEE

THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).



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 490...



DISCUSSION...A SMALL MCS COMPOSED OF A SUPERCELL AND SHORT BOWING

LINE SEGMENT IS EXPECTED TO CONTINUE EASTWARD ACROSS THE WATCH AREA

THIS EVENING INTO TONIGHT. STRONG VERTICAL SHEAR AND AT LEAST MODEST

INSTABILITY WILL SUSTAIN THESE ORGANIZED STORM MODES WHICH ARE

EXPECTED TO REMAIN SLIGHTLY DE-COUPLED FROM THE BOUNDARY LAYER.

LARGE HAIL AND DAMAGING WIND GUSTS WILL BE THE PRIMARY HAZARDS.



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 29030.





...MEAD



301 

WWUS20 KWNS 040123

SEL1

SPC WW 040123

WIZ000-040700-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 491

NWS STORM PREDICTION CENTER NORMAN OK

825 PM CDT WED SEP 3 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  NORTHWEST WISCONSIN



* EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 825 PM

  UNTIL 200 AM CDT.



* PRIMARY THREATS INCLUDE...

  ISOLATED VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 45

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 70 MILES WEST

NORTHWEST OF EAU CLAIRE WISCONSIN TO 65 MILES EAST NORTHEAST OF

EAU CLAIRE WISCONSIN.  FOR A COMPLETE DEPICTION OF THE WATCH SEE

THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).



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 490...



DISCUSSION...A SMALL MCS COMPOSED OF A SUPERCELL AND SHORT BOWING

LINE SEGMENT IS EXPECTED TO CONTINUE EASTWARD ACROSS THE WATCH AREA

THIS EVENING INTO TONIGHT. STRONG VERTICAL SHEAR AND AT LEAST MODEST

INSTABILITY WILL SUSTAIN THESE ORGANIZED STORM MODES WHICH ARE

EXPECTED TO REMAIN SLIGHTLY DE-COUPLED FROM THE BOUNDARY LAYER.

LARGE HAIL AND DAMAGING WIND GUSTS WILL BE THE PRIMARY HAZARDS.



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 29030.





...MEAD

