[MCD] SWOMCD

[MCD at goshenarc.org]

ACUS11 KWNS 071302
SWOMCD
SPC MCD 071301 
CAZ000-NVZ000-071800-

MESOSCALE DISCUSSION 0040
NWS STORM PREDICTION CENTER NORMAN OK
0701 AM CST FRI JAN 07 2005

AREAS AFFECTED...SIERRAS/SISKIYOUS/KLAMATH MTNS OF CA

CONCERNING...HEAVY SNOW AND NEAR BLIZZARD CONDITIONS 

VALID 071301Z - 071800Z

HEAVY SNOWFALL ACCOMPANIED BY INCREASINGLY STRONG WINDS EXPECTED
ACROSS THE SIERRAS/SISKIYOUS/KLAMATH MTNS OF NRN/CNTRL CA THIS
MORNING. WHILE 1.5-2.0 IN/HR RATES WILL BE COMMON...RELATIVELY
HEAVIEST SNOW LIKELY TO MATERIALIZE ACROSS THE CNTRL/SRN SIERRAS
THROUGH THE AFTERNOON...WITH VERY HEAVY SNOW RATES OF 2.0-4.0 IN/HR
POSSIBLE ABOVE 5000 FT LEVEL.

WATER VAPOR/INFRARED SATELLITE IMAGERY EARLY THIS MORNING PORTRAYS
COMPACT SHORTWAVE TROUGH OFF THE CNTRL CA COAST NEAR 35N/125W...WITH
COOLING CLOUD TOPS/MOIST PLUME EXPANDING EWD THROUGH CNTRL CA.
OBSERVATIONAL TRENDS/NUMERICAL GUIDANCE SUGGESTS STRONG DYNAMIC
ASCENT WILL OVERSPREAD MUCH OF CA THIS MORNING...WITH QUICK ONSET OF
HEAVY SNOWFALL FROM THE SISKIYOUS/KLAMATH MTNS INTO THE SRN SIERRAS.
CONSISTENT WITH 12Z OAK RAOB...09Z RUC SOUNDINGS SUGGEST SWLY WINDS
IN 1.5-4.0 KM LAYER INCREASING TO 40-65 KTS BY MID/LATE
MORNING...WITH CORRESPONDING OROGRAPHIC LIFT CONTRIBUTING TO STRONG
UVVS.

MESONET OBSERVATIONS EARLY THIS MORNING DEPICT FREEZING LEVELS
RANGING FROM AROUND 3000-3500 FT ACROSS THE NRN MTNS OF CA TO
4500-5000 FT ACROSS THE SRN SIERRAS. 12Z OAK RAOB FEATURES MOIST
PRECIP WATER VALUE OF 0.8 IN...INDICATIVE OF DEEP MOISTURE/DENDRITIC
PROFILES WHICH WILL CONTRIBUTE TO HEAVY SNOWFALL ACROSS THE
MOUNTAINOUS TERRAIN OF CA THROUGH AFTERNOON.

..GUYER.. 01/07/2005

...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.

ATTN...WFO...VEF...REV...HNX...MFR...STO...EKA...

40572199 40732240 40342275 39912257 39842268 39782316
40142322 40732349 41482325 41622268 41472223 40502088
39052000 37711872 36291782 35931757 35591790 35711845
36821915 37812015 38952056 

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