099 
fxus66 kmtr 081706 
afdmtr 


Area forecast discussion 
National Weather Service San Francisco Bay area California 
905 am PST Thursday Jan 8 2009 


Discussion...as of 9:00 am PST Thursday...fog continues in the 
valleys of the district...with a little patch of fog along the 
coast near Monterey. Elsewhere skies are mostly cloudy in the North 
Bay and partly cloudy elsewhere outside of the fog. A weakening 
cold front is moving into the North Bay with little if any rain. 


The cold front moving through he North Bay has been rapidly falling 
apart as it loses upper level support. Have updated the forecast to 
cut back on the probability of precipitation...leaving a slight chance north of the Golden 
Gate. Fog should also begin to clear this afternoon as the lower 
levels become more mixed. 


After today...ridging builds into the West Coast for the next 7 to 
10 days. This will bring above normal temperatures and dry weather. The flow 
will be offshore...however how much clear skies there will be in the 
north and East Bay valleys will depend if the fog mixes out of the 
Central Valley. Regardless...no rain is in sight for quite a while. 


&& 


Aviation...as of 4:10 am PST Thursday...low level moisture 
will maintain cloudy conditions across the Bay area including the 
north and East Bay regions and the Santa Clara Valley until midday. 
However conditions remain VFR with ceilings hovering around 600-800 
feet with the exception being ksts which has vlifr ceilings of 100 feet. 
Visibilities have lowered to 3-5 sm across the Bay area with lower visibilities 
over ksts. Temporary ceilings are anticipated over kmry around sunrise 
this morning. A weak frontal system that is approaching the region is 
quickly dissipate. A slight chance of a shower is possible near 
ksts but is not expected any further S. High pressure will build 
in behind the dissipating front ushering in a drier airmass and 
clearer skies by this afternoon. 


&& 


Mtr watches/warnings/advisories... 
... Coastal waters. 




&& 


$$ 


Public forecast: mhs 
aviation/marine: CW 


National Weather Service on the web at weather.Gov/sanfrancisco