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WWUS20 KWNS 022059

SEL3

SPC WW 022059

MTZ000-NDZ000-030600-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 473

NWS STORM PREDICTION CENTER NORMAN OK

255 PM MDT MON JUL 2 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHEAST AND EAST CENTRAL MONTANA

       NORTHWEST NORTH DAKOTA



EFFECTIVE THIS MONDAY AFTERNOON FROM 255 PM UNTIL MIDNIGHT MDT.



TORNADOES...HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 135 STATUTE

MILES EAST AND WEST OF A LINE FROM 65 MILES NORTH NORTHEAST OF

WOLF POINT MONTANA TO 45 MILES WEST SOUTHWEST OF GLENDIVE

MONTANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).



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.



OTHER WATCH INFORMATION...CONTINUE...WW 472...



DISCUSSION...DISCRETE SUPERCELLS EXPECTED TO FORM IN CNTRL MT...AND

STORMS/POSSIBLE SUPERCELLS FORMING ALONG STALLED BOUNDARY INVOF THE

MT/ND/SK BORDER...MAY POSE A THREAT FOR TORNADOES LATER THIS EVENING

AS ID UPR IMPULSE CONTINUES ENEWD.  STRENGTHENING DEEP WSWLY SHEAR

AND MODEST BUT MOIST SELY LOW LEVEL FLOW MAY ENHANCE POTENTIAL FOR

LOW LEVEL STORM ROTATION/POSSIBLE TORNADOES BEFORE ACTIVITY EVOLVES

INTO A LARGER SCALE CONVECTIVE SYSTEM.



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

SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

550. MEAN STORM MOTION VECTOR 27030.





...CORFIDI

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