[MCD] SWOMCD

[MCD at goshenarc.org]

ACUS11 KWNS 071826
SWOMCD
SPC MCD 071825 
CAZ000-NVZ000-072230-

MESOSCALE DISCUSSION 0041
NWS STORM PREDICTION CENTER NORMAN OK
1225 PM CST FRI JAN 07 2005

AREAS AFFECTED...MTNS OF CA...AND ELEVATIONS DOWN TO 1000 FT IN NRN
CA

CONCERNING...HEAVY SNOW 

VALID 071825Z - 072230Z

HEAVY SNOW WILL IMPACT MUCH OF THE SIERRA MTNS...THE COASTAL RANGES
OF SRN CA...AND THE MT SHASTA REGION. SNOW LEVELS ARE EXPECTED TO
FALL TO NEAR 1000 FT ACROSS FAR N-CENTRAL CA BY 00Z...WITH SNOW
LEVELS RANGING FROM 2500-4000 FT ACROSS THE REMAINDER OF THE
DISCUSSION AREA.

AT 18Z...PARENT UPPER TROUGH REMAINS QUASI-STATIONARY OFF THE WA
COAST. WELL-DEFINED VORT CENTER ON SATELLITE IMAGERY IS EMBEDDED IN
STRONG WESTERLIES SOUTH OF THE PARENT TROUGH...AND IS MOVING ONSHORE
ALONG THE CENTRAL CA COAST. THIS FEATURE WILL TRACK ENEWD AT 30-35KT
REACHING FAR WRN NV BY 08/00Z. DEEP-LAYER PVA COMBINED WITH SWLY
WINDS OF 60-80KT BETWEEN 2-4KM WILL LEAD TO HEAVY SNOW ALONG MUCH OF
THE SIERRA MTNS DURING THE NEXT 6 HRS. RUC 3-HRLY LIQUID EQUIVALENT
AMOUNTS EXCEED 0.5" ACROSS MUCH OF THIS REGION BETWEEN 18-21Z...AND
AGAIN BETWEEN 21-00Z. CONDITIONS SUGGEST SNOWFALL RATES OF
2-3"/HR...ESPECIALLY ALONG OROGRAPHICALLY FAVORED WRN SLOPES.

ACROSS FAR NRN CA...SNOW LEVELS SHOULD FALL BETWEEN 21-00Z AS
MID-LEVEL COLD POOL CURRENTLY OFFSHORE ROTATES EWD. STEEPENING LAPSE
RATES SUGGEST THE POTENTIAL FOR CONVECTIVE SNOW SHOWERS WITH SNOW
LEVELS DOWN TO 1-2 KFT BY 08/00Z ACROSS THE FAR NRN SACRAMENTO
VALLEY AND ADJACENT FOOTHILLS. THE 12Z ETA MODEL SOUNDINGS INDICATE
THE POTENTIAL FOR SNOW AT RDD AROUND 23Z.

FAR SRN PORTION OF FRONTAL PRECIPITATION BAND IS AFFECTING THE
COASTAL MTNS OF SRN CA AT 18Z. OROGRAPHIC LIFT SHOULD RESULT IN
LOCAL HEAVY SNOW ABOVE 2500 FT. ISOLATED LIGHTNING STRIKES HAVE BEEN
NOTED DURING THE PAST SEVERAL HOURS IN THE COASTAL BASIN AND
CONVECTIVE NATURE OF SNOW MAY LEAD BRIEFLY TO 1-2"/HR RATES THROUGH
22Z BEFORE TAPERING OFF.

..BANACOS.. 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...LOX...SGX...

40022255 39662250 39362252 39212271 39402305 39802338
40492374 41022379 41522356 41802315 41942250 41862169
41472121 40792077 39501999 38271899 37501849 36501801
35681807 35681860 36281879 37091929 37882005 38712066
39412109 40252157 40632184 40662216 40552247 40312261 

34951894 34951932 34881965 34741962 34621944 34551910
34531887 34611881 34831876 

34521766 34521798 34471834 34341831 34221813 34181780
34181763 34231745 34431745 

34431662 34431694 34381730 34251727 34121709 34091676
34091659 34141641 34341641 

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