

753 

WWUS20 KWNS 182157

SEL0

SPC WW 182157

MNZ000-WIZ000-LSZ000-190500-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 420

NWS STORM PREDICTION CENTER NORMAN OK

455 PM CDT THU JUL 18 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  NORTHERN MINNESOTA

  NORTHWEST WISCONSIN

  LAKE SUPERIOR



* EFFECTIVE THIS THURSDAY AFTERNOON FROM 455 PM UNTIL MIDNIGHT

  CDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL SIGNIFICANT DAMAGING WIND GUSTS TO 75 MPH POSSIBLE

  SEVERAL VERY LARGE HAIL EVENTS TO 3 INCHES IN DIAMETER POSSIBLE

  A FEW TORNADOES POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 50

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

OF BEMIDJI MINNESOTA TO 50 MILES NORTHEAST OF GRAND MARAIS

MINNESOTA.  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.



&&



DISCUSSION...THUNDERSTORMS ARE BEGINNING TO FORM ALONG THE COLD

FRONT OVER NORTHERN MN.  THIS ACTIVITY SHOULD TRACK EASTWARD ACROSS

THE WATCH AREA THROUGH THE EVENING.  A FEW SUPERCELLS AND BOW

STRUCTURES ARE POSSIBLE WITH A RISK OF VERY LARGE HAIL AND DAMAGING

WINDS.



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

TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65

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

MOTION VECTOR 27035.





...HART

