ZCZC SPCSWOMCD ALL
ACUS11 KWNS 092051 
SPC MCD 092051 
MTZ000-092215-

MESOSCALE DISCUSSION 0852
NWS STORM PREDICTION CENTER NORMAN OK
0351 PM CDT THU JUN 09 2016

AREAS AFFECTED...PORTIONS OF CNTRL/ERN MT

CONCERNING...SEVERE THUNDERSTORM WATCH 239...

VALID 092051Z - 092215Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 239
CONTINUES.

SUMMARY...SCATTERED SUPERCELLS WILL CONTINUE MOVING ACROSS PORTIONS
OF CNTRL/ERN MT THIS AFTERNOON. SVR HAIL...SOME POSSIBLY SIGNIFICANT
/DIAMETER 2 INCHES OR GREATER/...MAY ACCOMPANY THIS ACTIVITY. A
TORNADO OR TWO WILL ALSO BE POSSIBLE.

DISCUSSION...SCATTERED SUPERCELLS WILL CONTINUE SPREADING ENEWD/EWD
ACROSS PORTIONS OF CNTRL MT FROM MEAGHER COUNTY TO FERGUS
COUNTY...SPREADING INTO PETROLEUM COUNTY AND EVENTUALLY EWD INTO
PARTS OF GARFIELD AND VALLEY COUNTIES. THE PRESENCE OF 1000-2000
J/KG OF MLCAPE WITH 50-65 KT OF EFFECTIVE BULK SHEAR WILL MAINTAIN
SUPERCELL STRUCTURES WITH SVR HAIL -- SOME POSSIBLY SIGNIFICANT --
AND SVR WIND POTENTIAL. SFC OBSERVATIONS AT LEWISTOWN AND JORDAN
INDICATE DEWPOINTS HOLDING IN THE MIDDLE/UPPER 50S WITH A NORTH
WIND...IMPLYING SUPPORT OF AMPLE MOISTURE/BUOYANCY WITH AN ELONGATED
HODOGRAPH. DESPITE WEAK LOW-LEVEL FLOW...HODOGRAPH CURVATURE/LONG
LENGTH THROUGH A DEEP LAYER WILL SUPPORT THE RISK FOR A TORNADO OR
TWO WITH THE AFOREMENTIONED CONVECTION RESIDING NEAR/N OF A
QUASI-STATIONARY BOUNDARY. OTHER MORE ISOLATED SUPERCELLS NEAR/E OF
HAVRE AND NEAR BOZEMAN WILL ALSO POSE A SVR RISK WHILE SPREADING
EWD.

..COHEN.. 06/09/2016

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...BYZ...GGW...TFX...

LAT...LON   45721168 47401113 48820828 48870532 48520434 47050426
            46270539 45590929 45151130 45721168 

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