FXUS66 KMFR 151701
AFDMFR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MEDFORD OR
900 AM PST TUE DEC 15 2009

.DISCUSSION...
A SLOW MOVING COLD FRONT THAT WILL START TO MOVE INLAND LATE
THIS MORNING. HIGH WINDS AT THE COAST WILL BEGIN TO DIMINISH
AS THE FRONT PUSHES INLAND AND WILL TAPER OFF IN THE AFTERNOON.

MODERATE TO HEAVY SNOWS FALLING IN THE MT SHASTA AREA WILL
CONTINUE INTO THE AFTERNOON THEN DIMINISH LATE AFTERNOON AS
A WAVE ON THE COLD FRONT MOVES NORTH RESULTING IN DECREASED
WINDS AND SNOW FALL RATES. SNOW LEVELS ARE FAIRLY HIGH WITH 
THIS SYSTEM WITH ACCUMULATING SNOW OCCURRING ABOVE 4500 TO 5000
FEET. STRONG WINDS WILL CONTINUE AROUND SILVER LAKE THROUGH
THE AFTERNOON UNTIL THE WAVE ON THE FRONT MOVES FURTHER NORTH.

TONIGHT WINDS DECREASE OVER THE REGION AND PRECIPITATION 
BECOMES LIGHT. THE COLD FRONT BECOMES QUITE WEAK BUT WEAK
MID LEVEL DISTURBANCES KEEPS LIGHT PRECIPITATION GOING THROUGH
WEDNESDAY.

THURSDAY A WARM FRONT BRING MORE LIGHT PRECIPITATION WITH SNOW
LEVELS AROUND 5000 FEET. THURSDAY NIGHT A WEAK COLD FRONT MOVES
THROUGH THE AREA. FRIDAY AND SATURDAY WEAK MID LEVEL DISTURBANCES
KEEP THE REGION CLOUDY AND THERE WILL BE LIGHT PRECIPITATION OFF
AND ON.

NEXT MONDAY AND TUESDAY A STRONGER LOW PRESSURE SYSTEM WILL LIKELY
AFFECT OUR AREA.

&&

.AVIATION...WITH A SLOW MOVING COLD FRONT ACROSS THE REGION 
GENERALLY MVFR CIGS AND VSBY IN RAIN AND SNOW AREA WIDE THROUGH 
TODAY AND TONIGHT. IFR CIGS VSBY IN SNOW OVER THE HIGHER TERRAIN. 
ALSO...LOCAL LOW LEVEL WIND SHEAR WILL AFFECT THE COAST AND INLAND 
PROTECTED VALLEYS AS UPPER WINDS REMAIN STRONG THROUGH THIS EVENING. 
CONDITIONS WILL IMPROVE WEDNESDAY.

&&

.MFR WATCHES/WARNINGS/ADVISORIES...
OR...WINTER WEATHER ADVISORY UNTIL 10 PM PST THIS EVENING FOR ORZ030-
     ORZ031.
     HIGH WIND WARNING UNTIL 10 PM PST THIS EVENING FOR ORZ031.
     HIGH WIND WARNING UNTIL 1 PM PST THIS AFTERNOON FOR ORZ021-
     ORZ022.
     WINTER WEATHER ADVISORY UNTIL 3 PM PST THIS AFTERNOON FOR 
     ORZ027-ORZ028-ORZ029.

CA...WINTER WEATHER ADVISORY UNTIL 10 PM PST THIS EVENING FOR CAZ085.
     WINTER WEATHER ADVISORY UNTIL 3 PM PST THIS AFTERNOON FOR 
     CAZ084.
     WINTER STORM WARNING UNTIL 3 PM PST THIS AFTERNOON FOR CAZ082-
     CAZ083.
     WIND ADVISORY UNTIL 10 PM PST THIS EVENING FOR CAZ081.

PACIFIC COASTAL WATERS...GALE WARNING UNTIL 10 PM PST THIS EVENING 
     FOR PZZ350-PZZ356-PZZ370-PZZ376.
     HAZARDOUS SEAS WARNING UNTIL 4 AM PST THURSDAY FOR 
     PZZ350-PZZ356-PZZ370-PZZ376.

$$

11