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URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 584

NWS STORM PREDICTION CENTER NORMAN OK

530 PM CDT SAT AUG 7 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL MINNESOTA

       EASTERN NORTH DAKOTA

       FAR NORTHEASTERN SOUTH DAKOTA



EFFECTIVE THIS SATURDAY AFTERNOON AND SUNDAY MORNING FROM 530 PM

UNTIL 100 AM CDT.



TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 75 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 55 MILES WEST NORTHWEST OF

FARGO NORTH DAKOTA TO 35 MILES NORTH NORTHEAST OF MINNEAPOLIS

MINNESOTA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND 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.



DISCUSSION...TSTMS EXPECTED TO FORM IN THE NEXT 1-2 HRS NEAR WNW/ESE

ORIENTED WARM/STNRY FRONT EXTENDING FROM SE ND INTO SE MN...IN

RESPONSE TO CONTINUED SFC HEATING...WAA...AND UPR DIVERGENCE WITH

PASSING UPR IMPULSE.  GIVEN DEGREE OF CAPE /AOA 3000 J PER

KG/...MOISTURE-RICH INFLOW...AND DIFFUSE NATURE OF FRONT...POTENTIAL

WILL EXIST FOR DISCRETE SUPERCELLS WITH A RISK FOR VERY LARGE

HAIL...DMGG WINDS...AND TORNADOES.  EXPECTED SUSTAINED WAA/ASCENT

SUGGESTS LIKELIHOOD FOR STORMS TO INCREASE IN COVERAGE THROUGH MID

EVE.  THIS COULD YIELD AN MCS WITH SIZABLE BOWING SEGMENTS/HIGH

WIND.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

550. MEAN STORM MOTION VECTOR 29035.





...CORFIDI

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