[MCD] SWOMCD

[MCD at goshenarc.org]

ACUS11 KWNS 081305
SWOMCD
SPC MCD 081305 
IDZ000-ORZ000-081900-

MESOSCALE DISCUSSION 2520
NWS STORM PREDICTION CENTER NORMAN OK
0705 AM CST WED DEC 08 2004

AREAS AFFECTED...W CNTRL/BOISE MTNS OF ID

CONCERNING...HEAVY SNOW 

VALID 081305Z - 081900Z

...PERIODS OF HEAVY SNOW ARE EXPECTED TO DEVELOP THIS MORNING INTO
AFTN ACROSS THE W CNTRL MTNS OF ID THROUGH THE CAMAS REGION MAINLY
ABOVE 5000 FEET...

LATEST WV IMAGERY SUGGESTS NOSE OF MID LEVEL JET HAS ADVANCED TO THE
BLUE/WALLOWA MTNS OF NE ORE...WITH 60 KT WLY FLOW BEING SAMPLED JUST
ABOVE 500 MB AT BOISE...AND OVER 100 KT OBSERVED WITHIN THE PAST TWO
HOURS AT MEDFORD...WHICH HAS INCREASED FROM 60 KT AT 06Z. IN
ADDITION...VERY STRONG SLY LOW LEVEL JET IS FOCUSING MOISTURE ACROSS
THE HIGHER ELEVATIONS IN W CNTRL ID. THE STRONGEST DIVERGENCE
ASSOCIATED WITH THE LEFT EXIT REGION OF THE UPPER JET WILL SPREAD
FROM ERN ORE/WA INTO THE SRN TWO-THIRDS OF ID THROUGH 18Z.

LATEST SNOW LEVELS ARE ABOVE 5000 FEET PER 12Z BOI SOUNDING/CURRENT
SFC OBSERVATIONS. AS MID LEVEL TROUGH MOVES THROUGH THE AREA...WINDS
WILL BECOME MORE WLY...INCREASING OROGRAPHIC ASCENT. STRONG WAA
PATTERN WILL FAVOR INCREASING SNOW LEVELS...ESPECIALLY AFTER 18Z.
HOWEVER...FAVORED DENDRITIC GROWTH REGION IS FORECAST TO CONTINUE
ACROSS THE WCNTRL MTNS OF ID THROUGH AT LEAST 18Z WITH SNOWFALL
RATES OF 2"/HR ABOVE 5000 FEET.

..TAYLOR.. 12/08/2004

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

...NOTICE...
SPC WINTER WEATHER MESOSCALE DISCUSSIONS WILL BE ISSUED ON A 
SCHEDULED BASIS...FOUR TIMES A DAY...BETWEEN 00-01 UTC...
06-07 UTC...12-13 UTC...AND 18-19 UTC AS SIGNIFICANT SHORT
RANGE WINTER WEATHER EVENTS UNFOLD.  THIS SCHEDULE WILL BE
USED FROM DECEMBER 1 THROUGH FEBRUARY 28 TO ALLOW PARTNERS
AND USERS TO BETTER ANTICIPATE THE TIMING OF SPC WINTER WEATHER
MESOSCALE DISCUSSIONS.

ATTN...WFO...PIH...MSO...BOI...PDT...

43211352 43111501 44111624 44491724 44981746 45341719
45411647 45061534 43731345 

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