FXUS65 KSLC 141625
AFDSLC

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
925 AM MST MON DEC 14 2009

.SYNOPSIS...HIGH PRESSURE WILL BRIEFLY DEVELOP OVER THE AREA
THIS AFTERNOON THROUGH TONIGHT. A MILD WESTERLY FLOW WILL FOLLOW
FOR TUESDAY AND PERSIST ACROSS THE REGION THROUGH MOST OF THE
WEEK. A SERIES OF PACIFIC SYSTEMS IN THIS FLOW WILL GRAZE
NORTHERN UTAH LATER TUESDAY THROUGH THURSDAY.

&&

.DISCUSSION...THE BROAD UPPER TROF THAT BROUGHT SIGNIFICANT PRECIP
TO THE CWA HAS SHIFTED EAST THIS MORNING AS THE UPSTREAM RIDGE
MOVES ONTO THE WEST COAST. LINGERING INSTABILITY IN THE WNW FLOW
OVER UT HAS KEPT CLOUDS OVER THE NORTH AND SCATTERED SNOW SHOWERS
GOING OVER THE NRN MTNS. SKIES HAVE CLEARED ACROSS THE SOUTH AND
PATCHY FOG WAS NOTED IN THE EASTERN VALLEYS. 

THE DEPTH OF THE INSTABILITY SHOULD CONTINUE TO DECREASE THRU THE
REST OF THE DAY AND SKIES WILL GRADUALLY CLEAR OVER THE NORTH. 

THE UPSTREAM RIDGE AXIS SHIFTS OVERHEAD TOMORROW AND MOISTURE
STREAMING INTO THE PACNW SAGS INTO NRN UT. WE REMAIN AT THE SRN
FRINGE OF THIS STREAM BUT COULD SEE A LITTLE PRECIP ACROSS THE FAR
N TUE NIGHT INTO WED WITH SNOW LEVELS NEAR 6500 FT. 

EXPECT INVERSIONS TO BECOME STRONG IN THE ERN VALLEYS THIS WEEK WHILE
CLOUDS WILL KEEP THE NORTH FROM GETTING TOO STAGNANT.

CURRENT PACKAGE ON TRACK AND NO UPDATES PLANNED AT THIS TIME.

&&

.AVIATION...VFR CONDITIONS WITH CIGS ABOVE 6000 FT AGL ARE
EXPECTED AT THE SLC TERMINAL TODAY. HOWEVER...THERE IS A 30
PERCENT CHANCE OF PERIODS OF CIGS BELOW 6000 FT BEFORE 18Z IN
LIGHT SNOW SHOWERS. SOUTHEAST WINDS ARE EXPECTED TO SHIFT TO THE
NORTHWEST BETWEEN 18Z AND 20Z.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...NONE.
WY...NONE.

&&

$$

WILENSKY/TRAPHAGAN

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