

010 

WWUS20 KWNS 300052

SEL9

SPC WW 300052

MNZ000-300800-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 539

NWS STORM PREDICTION CENTER NORMAN OK

750 PM CDT SUN JUL 29 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHERN MINNESOTA



EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 750 PM UNTIL

300 AM CDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 40

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 15 MILES SOUTH

SOUTHWEST OF HALLOCK MINNESOTA TO 20 MILES SOUTH SOUTHEAST OF ELY

MINNESOTA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).



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...MCS OVER SERN MANITOBA IS EXPECTED TO CONTINUE SEWD

ACROSS THE INTERNATIONAL BORDER TONIGHT WITH PREFERRED STORM

DEVELOPMENT ALONG SRN/SWRN FLANK OF SYSTEM IN RESPONSE TO THE

FORMATION OF A NOCTURNAL LOW-LEVEL WIND MAXIMUM.  FARTHER E...A

SEPARATE CLUSTER OF TSTMS ONGOING ALONG OUTFLOW BOUNDARY NNE OF DLH

MAY ALSO PERSIST AS INFLOW IS ENHANCED BY THE ABOVE-MENTIONED LLJ.

SEVERE HAIL AND DAMAGING WIND GUSTS WILL BE THE PRIMARY HAZARDS WITH

THESE STORMS.



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 550. MEAN STORM

MOTION VECTOR 30030.





...MEAD

