[MCD] SWOMCD

Mon Nov 28 12:53:30 UTC 2005

ACUS11 KWNS 281251
SWOMCD
SPC MCD 281251 
CAZ000-281745-

MESOSCALE DISCUSSION 2493
NWS STORM PREDICTION CENTER NORMAN OK
0651 AM CST MON NOV 28 2005

AREAS AFFECTED...NRN CA

CONCERNING...HEAVY SNOW 

VALID 281251Z - 281745Z

SNOW RATES AT OR ABOVE 1" PER HOUR WILL DEVELOP BETWEEN 15 AND 18
UTC AS AREA OF PRECIPITATION CLEARLY VISIBLE ON IR IMAGERY MOVES
ONSHORE THIS MORNING. JET STREAK AROUND 65 KTS EMBEDDED WITHIN
STRONG WESTERLY FLOW REACHES THE NRN CA COAST AROUND 17 UTC PER 11
UTC RUC FORECAST. FORECAST SOUNDINGS SHOW SHALLOW LAYER OF WARM AIR
NEAR THE SURFACE WITH 12 UTC TEMPERATURES RANGING FROM 32F AT YREKA
TO 42F AT REDDING. DEEP SATURATED AIR MASS WITH UPWARD MOTION
THROUGH THE DENDRITIC GROWTH ZONE WILL AID THE SNOWFALL RATES.
ACCUMULATING SNOW SHOULD BEGIN AROUND 2500 FEET MSL AND LOWER TO
ABOUT 2000 FEET MSL BY 18 UTC AS SLIGHT WET BULB COOLING OCCURS AND
PRECIPITATION INTENSITY INCREASES. ISOLATED HIGHER ELEVATION VALLEYS
COULD EXPERIENCE AN HOUR OR TWO OF FREEZING RAIN BEFORE CHANGING
OVER TO RAIN OR SNOW. THE PREDOMINATE PRECIPITATION TYPE BY 18 UTC
WILL BE SNOW WITH RATES OF 1 INCH PER HOUR ABOVE 2000 FEET MSL.

..BRIGHT.. 11/28/2005

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

...NOTICE...
SPC WINTER WEATHER MESOSCALE DISCUSSIONS WILL BE ISSUED ON A
SCHEDULED BASIS FROM DECEMBER 1 THROUGH FEBRUARY 28...FOUR
TIMES A DAY...BETWEEN 00-01 UTC...06-07 UTC...12-13 UTC...
AND 18-19 UTC FOR SIGNIFICANT SHORT RANGE WINTER WEATHER EVENTS.

ATTN...WFO...REV...MFR...STO...EKA...

41052328 41702267 41652199 40772108 40142071 39842103
40202217 40632269 40582323 

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