SWOMCD
SPC MCD 032154
IDZ000-MTZ000-UTZ000-NVZ000-ORZ000-032300-
MESOSCALE DISCUSSION 1418
NWS STORM PREDICTION CENTER NORMAN OK
0454 PM CDT FRI JUL 03 2009
AREAS AFFECTED...NERN NV...ERN OR...SRN/CNTRL ID...NWRN UT
CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY
VALID 032154Z - 032300Z
ISOLD STRONG TO SEVERE STORMS WILL CONTINUE TO DEVELOP THIS
AFTERNOON...WITH PRIMARY THREATS OF DMGG WINDS AND HEAVY RAINFALL.
RAINFALL RATES MAY EXCEED ONE INCH AN HOUR AT TIMES. DUE TO ISOLD
NATURE...A WW IS NOT ANTICIPATED.
RELATIVELY STAGNANT PATTERN IS ONCE AGAIN FAVORABLE FOR ISOLD STRONG
TO SEVERE STORMS THIS AFTERNOON AROUND THE PERIPHERY OF A FLATTENING
UPPER RIDGE TO THE SOUTH AND EAST. A VORTICITY MAXIMUM NOW MOVING
NEWD INTO NERN CA/WRN NV HAS PROVIDED FAVORABLE ASCENT FOR CLUSTERS
OF STORMS ACROSS THE HIGHER TERRAIN OF NV/OR/ID IN COMBINATION WITH
WELL ABOVE NORMAL PWAT/MOISTURE. MLCAPE NEAR 750 TO 1000 J/KG AND
NEARLY STRAIGHT LINE HODOGRAPHS WILL BE SUPPORTIVE OF OCCASIONAL
ROTATION/SPLITTING CELLS. DESPITE RELATIVELY HIGH WBZ
HEIGHTS...MARGINAL TO SEVERE HAIL WILL BE POSSIBLE IN STRONGER
CORES. STEEP LOW LEVEL LAPSE RATES WILL FAVOR DMGG WINDS...WITH
OUTFLOWS ACCELERATING TOWARDS THE LOWER VALLEYS WHERE
TEMPERATURE/DEW POINT SPREADS AND INSTABILITY ARE GREATER. DMGG WIND
GUSTS MAY OCCUR WELL REMOVED FROM THUNDERSTORMS. GIVEN HIGH MOISTURE
CONTENT AND SOMEWHAT WEAK FLOW...HEAVY RAINFALL WITH RATES AOA AN
INCH AN HOUR ARE POSSIBLE.
..HURLBUT.. 07/03/2009
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...TFX...SLC...PIH...MSO...BOI...LKN...
LAT...LON 40291421 39161458 39221577 39891635 40861691 41721788
42021879 42741906 43521936 44041812 43961627 44051457
44391286 44301161 43021159 42151220 40291421
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