MESOSCALE DISCUSSION 2083
   NWS STORM PREDICTION CENTER NORMAN OK
   0252 PM CDT MON AUG 29 2011
   
   AREAS AFFECTED...S-CNTRL MT...N-CNTRL WY
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 291952Z - 292115Z
   
   THE THREAT FOR ISOLATED SEVERE WINDS/MARGINAL HAIL WILL INCREASE
   THIS AFTERNOON AS SCATTERED TSTMS APPROACH A WARM/DEEPLY-MIXED
   ENVIRONMENT ACROSS S-CNTRL MT INTO FAR NRN WY. OVERALL SETUP APPEARS
   MARGINALLY FAVORABLE FOR A SEVERE TSTM WATCH ISSUANCE DURING THE
   NEXT FEW HOURS.
   
   A WEAKENING BUT PERSISTENT MID-LEVEL CIRCULATION EVIDENT ACROSS WRN
   MT SHOULD PROGRESS EWD ACROSS THE STATE THROUGH THIS EVENING.
   ASSOCIATED FORCED ASCENT AND DIURNAL HEATING HAS FOSTERED INCREASING
   TSTM COVERAGE ACROSS THE HIGHER TERRAIN OF SWRN MT INTO NWRN WY.
   ASOS AND MESONET OBSERVATIONS CONFIRM TEMPERATURES LARGELY IN THE
   80S DOWNSTREAM IN S-CNTRL MT AND N-CNTRL WY WHERE NEARLY FULL
   INSOLATION HAS OCCURRED. WITH SURFACE DEW POINT DEPRESSIONS AROUND
   30 TO 40 DEG F...THIS STEEP LOW-LEVEL LAPSE RATE ENVIRONMENT ALONG
   WITH A BELT OF MODERATE EFFECTIVE SHEAR /FROM 25 TO 35 KT/ SHOULD
   PROVE FAVORABLE FOR ORGANIZED CLUSTERS/OCCASIONAL SUPERCELL
   STRUCTURES WITH THE PRIMARY THREAT BEING SEVERE WIND GUSTS.
   
   ..GRAMS.. 08/29/2011
   
   
   ATTN...WFO...UNR...BYZ...GGW...RIW...TFX...
   
   LAT...LON   44840917 45710911 46790942 47440973 47570927 47140755
               46120633 45290577 44860557 44480574 44120595 44020674
               43950758 44080838 44840917