

000 

WWUS20 KWNS 270255

SEL6

SPC WW 270255

MTZ000-NDZ000-270900-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 756

NWS STORM PREDICTION CENTER NORMAN OK

855 PM MDT SAT JUL 26 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EASTERN MONTANA

       SOUTHWEST NORTH DAKOTA



EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 855 PM

UNTIL 300 AM MDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80

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



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 105

STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES NORTHWEST OF

GARRISON NORTH DAKOTA TO 35 MILES SOUTHEAST OF BAKER MONTANA.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU6).



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 753...WW 754...WW 755...



DISCUSSION...BAND OF INTENSE STORMS INCREASING WITHIN INSTABILITY

AXIS ACROSS NERN MT ATTM. THIS CONVECTION WAS BEING DRIVEN IN PART

BY LOW AMPLITUDE SHORT WAVE TROUGH CRESTING THE BROAD UPPER RIDGE

ACROSS THE REGION. MOIST AND UNSTABLE ELY INFLOW TO THESE STORMS

SHOULD MAINTAIN THE PROSPECT FOR UPSCALE ORGANIZATION INTO LINEAR

MCS WITH DAMAGING WINDS AND HAIL.



AVIATION...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 500. MEAN STORM

MOTION VECTOR 29035.





...CARBIN

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