

337 

WWUS20 KWNS 312359

SEL1

SPC WW 312359

IAZ000-MNZ000-WIZ000-010700-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 481

NWS STORM PREDICTION CENTER NORMAN OK

700 PM CDT SUN AUG 31 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  NORTHERN IOWA

  EASTERN AND SOUTHERN MINNESOTA

  WESTERN WISCONSIN



* EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 700 PM

  UNTIL 200 AM CDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED DAMAGING WINDS AND ISOLATED SIGNIFICANT GUSTS TO 75

    MPH POSSIBLE

  ISOLATED VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE

  A TORNADO OR TWO POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 65

STATUTE MILES EAST AND WEST OF A LINE FROM 25 MILES EAST OF FORT

DODGE IOWA TO 45 MILES NORTH OF MINNEAPOLIS MINNESOTA.  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 479...WW 480...



DISCUSSION...STRENGTHENING CONVECTION ALSO IS INCREASING IN COVERAGE

ALONG/AHEAD OF SFC COLD-FRONTAL ZONE ACROSS PORTIONS CENTRAL/SRN MN

AND NWRN IA...WHILE OTHER STG-SVR TSTMS ARE EXPECTED TO VOE INTO

THIS AREA FROM WW 479 DOMAIN.  CLUSTERED TO QUASI-LINEAR STORM MODES

SHOULD PREDOMINATE...WITH LARGE HAIL AND DAMAGING GUSTS EXPECTED.  A

TORNADO CANNOT BE RULED OUT...HOWEVER.



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

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65

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

MOTION VECTOR 25025.





...EDWARDS



969 

WWUS20 KWNS 312359

SEL1

SPC WW 312359

IAZ000-MNZ000-WIZ000-010700-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 481

NWS STORM PREDICTION CENTER NORMAN OK

700 PM CDT SUN AUG 31 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  NORTHERN IOWA

  EASTERN AND SOUTHERN MINNESOTA

  WESTERN WISCONSIN



* EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 700 PM

  UNTIL 200 AM CDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED DAMAGING WINDS AND ISOLATED SIGNIFICANT GUSTS TO 75

    MPH POSSIBLE

  ISOLATED VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE

  A TORNADO OR TWO POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 65

STATUTE MILES EAST AND WEST OF A LINE FROM 25 MILES EAST OF FORT

DODGE IOWA TO 45 MILES NORTH OF MINNEAPOLIS MINNESOTA.  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 479...WW 480...



DISCUSSION...STRENGTHENING CONVECTION ALSO IS INCREASING IN COVERAGE

ALONG/AHEAD OF SFC COLD-FRONTAL ZONE ACROSS PORTIONS CENTRAL/SRN MN

AND NWRN IA...WHILE OTHER STG-SVR TSTMS ARE EXPECTED TO VOE INTO

THIS AREA FROM WW 479 DOMAIN.  CLUSTERED TO QUASI-LINEAR STORM MODES

SHOULD PREDOMINATE...WITH LARGE HAIL AND DAMAGING GUSTS EXPECTED.  A

TORNADO CANNOT BE RULED OUT...HOWEVER.



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

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65

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

MOTION VECTOR 25025.





...EDWARDS

