SWOMCD
SPC MCD 092154
MTZ000-WYZ000-092300-
MESOSCALE DISCUSSION 1631
NWS STORM PREDICTION CENTER NORMAN OK
0454 PM CDT MON AUG 09 2010
AREAS AFFECTED...NW WY AND SCNTRL MT
CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
VALID 092154Z - 092300Z
SUB-SYNOPTIC IMPULSE OVER THE UPPER SNAKE RIVER VALLEY IS EXPECTED
TO CONTINUE NE INTO NWRN WY AND SCNTRL MT THIS EVENING. DEEP-LAYER
FLOW WITHIN THE ERN PERIPHERY OF THIS FEATURE WAS CHARACTERIZED BY
SWLYS OF 30-55 KT IN THE 700-500 MB LAYER WITH MODEST LOW-LEVEL
TURNING. EVEN WITH THE FAVORABLE MASS CONVERGENCE AND SUPERCELL
WIND PROFILES IN PLACE...STORMS HAVE BEEN STRUGGLING A
BIT...PROBABLY DUE TO THE MODEST BUOYANCY IN PLACE. NONETHELESS...
INVERTED-V LOW-LEVEL THERMODYNAMIC PROFILES MAY AUGMENT DOWNDRAFTS
AS STORMS MOVE ENE OFF THE HIGHER TERRAIN INTO NWRN WY AND SCNTRL MT
THIS EVENING. THIS WILL BE PARTICULARLY THE CASE WITH ANY LINE
SEGMENTS THAT CAN BECOME ORIENTED PARALLEL WITH THE MEAN SWLY FLOW
REGIME.
..RACY.. 08/09/2010
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...BYZ...RIW...TFX...
LAT...LON 44441082 46181100 46620893 46690716 46610598 46020584
44930785 43100886 42811099 44441082
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