MESO: Mesoscale Discussion 1442

ACUS11 KWNS 172322
SWOMCD
SPC MCD 172321
MTZ000-180015-

MESOSCALE DISCUSSION 1442
NWS STORM PREDICTION CENTER NORMAN OK
0621 PM CDT TUE JUN 17 2008

AREAS AFFECTED...PARTS OF CENTRAL MT

CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE

VALID 172321Z - 180015Z

RECENT RADAR IMAGERY SUGGESTS STORMS ARE INTENSIFYING ACROSS PARTS
OF CENTRAL MT. A WW IS POSSIBLE WITHIN THE HR.

REGIONAL RADAR MOSAIC SHOWS THAT HIGH-BASED STORMS HAVE DEVELOPED
ACROSS MT THE PAST FEW HOURS. 23Z SURFACE ANALYSIS SHOWS A LOW
PRESSURE TROUGH ACROSS CENTRAL AND SWRN MT WITH TEMPS IN THE
80S/DEWPTS IN THE 40S. STEEP LOW LEVEL LAPSE RATES DEVELOPED AS A
RESULT OF STRONG DIABATIC HEATING...SUPPORTING MARGINAL TO MODERATE
INSTABILITY /500-1500 J/KG MLCAPE/. THE STRONGER STORMS WILL BE
CAPABLE OF DAMAGING WINDS AND LARGE HAIL. THE MAGNITUDE OF SHEAR
AND FORCING ASSOCIATED WITH THE UPPER IMPULSE OVER THE NRN ROCKIES
REGION SUGGESTS THE SEVERE THREAT SHOULD PERSIST THROUGH THE
EVENING.

..SMITH.. 06/17/2008

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

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

46431273 46891283 47451227 48431190 48761115 49020981
48440812 47690809 47000856 46190926 45690987 45361088
45281164 45421209 45831246 46091261

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