[MCD] SWOMCD

[MCD at goshenarc.org]

ACUS11 KWNS 080658
SWOMCD
SPC MCD 080657 
NVZ000-CAZ000-081300-

MESOSCALE DISCUSSION 2519
NWS STORM PREDICTION CENTER NORMAN OK
1257 AM CST WED DEC 08 2004

AREAS AFFECTED...NRN CA CASCADES

CONCERNING...HEAVY SNOW 

VALID 080657Z - 081300Z

...SNOW RATES WILL BE AT LEAST 2"/HOUR ABOVE 4000 FEET ACROSS THE
SISKIYOU/SHASTA MTNS OF NRN CA...

STRONG UPPER STORM SYSTEM CURRENTLY OFF WEST COAST WILL PROVIDE
ABUNDANT LARGE SCALE LIFT ACROSS NRN CA OVERNIGHT...WITH HEAVY
SNOWFALL LIKELY IN THE HIGHER ELEVATIONS. UPPER VERTICAL MOTION WILL
BE ENHANCED BOTH BY JET DYNAMICS AND STRONG WAA PATTERN EVIDENT IN
LATEST VAD WIND PROFILES. RECENT OBSERVATION AT BLUE RIVER OF 3
INCHES OF SNOW IN 1 HOUR SUGGESTS POTENTIAL FOR HEAVY SNOWFALL RATES
OVERNIGHT. 

THERMODYNAMICS PROFILES/FORECAST 700MB TEMPS INDICATE SNOW LEVELS
MAINLY ABOVE 4000 FEET WITH RAIN IN THE VALLEYS. IN ADDITION TO THE
THREAT OF HEAVY SNOW...A 40-45 KT LOW LEVEL JET WILL CREATE WINDY
CONDITIONS/BLOWING SNOW AT THE SURFACE.

..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...REV...MFR...STO...

38752019 39322143 41302229 41732218 41732174 40822149
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