

125 

WWUS20 KWNS 202246

SEL6

SPC WW 202246

IAZ000-MNZ000-WIZ000-210300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 506

NWS STORM PREDICTION CENTER NORMAN OK

545 PM CDT SAT SEP 20 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  NORTHERN IOWA

  SOUTHEAST MINNESOTA

  WESTERN WISCONSIN



* EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 545 PM UNTIL

  1000 PM CDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  ISOLATED LARGE HAIL EVENTS TO 1 INCH IN DIAMETER POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80

STATUTE MILES EAST AND WEST OF A LINE FROM 60 MILES NORTH OF LA

CROSSE WISCONSIN TO 25 MILES SOUTHEAST OF MASON CITY IOWA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU6).



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 503...WW 504...WW 505...



DISCUSSION...LOOSELY ORGANIZED BAND OF STRONG TO SVR TSTMS AHEAD OF

LEAD IMPULSE ASSOCIATED WITH AMPLIFYING N CNTRL U.S. UPR TROUGH

EXPECTED TO MAINTAIN SUFFICIENT STRENGTH TO POSE AN ISOLD TO SCTD

DMGG WIND THREAT THROUGH AT LEAST MID EVE AS THE LINE CONTINUES SEWD

IN SE MN/SW WI AND NRN IA. LINE MAY BE AUGMENTED BY DEVELOPMENT OF

ADDITIONAL DISCRETE STORMS AHEAD OF THE LINE. GIVEN 50+ KT WNW DEEP

SHEAR AND RELATIVELY COOL MID-LVL TEMPS...SETUP ALSO MAY YIELD

STORMS WITH MARGINALLY SVR HAIL DESPITE ONSET OF NIGHTFALL.



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

TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.

A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 350. MEAN STORM MOTION

VECTOR 30035.





...CORFIDI



959 

WWUS20 KWNS 202246

SEL6

SPC WW 202246

IAZ000-MNZ000-WIZ000-210300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 506

NWS STORM PREDICTION CENTER NORMAN OK

545 PM CDT SAT SEP 20 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  NORTHERN IOWA

  SOUTHEAST MINNESOTA

  WESTERN WISCONSIN



* EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 545 PM UNTIL

  1000 PM CDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  ISOLATED LARGE HAIL EVENTS TO 1 INCH IN DIAMETER POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80

STATUTE MILES EAST AND WEST OF A LINE FROM 60 MILES NORTH OF LA

CROSSE WISCONSIN TO 25 MILES SOUTHEAST OF MASON CITY IOWA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU6).



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 503...WW 504...WW 505...



DISCUSSION...LOOSELY ORGANIZED BAND OF STRONG TO SVR TSTMS AHEAD OF

LEAD IMPULSE ASSOCIATED WITH AMPLIFYING N CNTRL U.S. UPR TROUGH

EXPECTED TO MAINTAIN SUFFICIENT STRENGTH TO POSE AN ISOLD TO SCTD

DMGG WIND THREAT THROUGH AT LEAST MID EVE AS THE LINE CONTINUES SEWD

IN SE MN/SW WI AND NRN IA. LINE MAY BE AUGMENTED BY DEVELOPMENT OF

ADDITIONAL DISCRETE STORMS AHEAD OF THE LINE. GIVEN 50+ KT WNW DEEP

SHEAR AND RELATIVELY COOL MID-LVL TEMPS...SETUP ALSO MAY YIELD

STORMS WITH MARGINALLY SVR HAIL DESPITE ONSET OF NIGHTFALL.



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

TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.

A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 350. MEAN STORM MOTION

VECTOR 30035.





...CORFIDI

