Weather

290 
fxus66 klox 102030 
afdlox 


Southwest California area forecast discussion 
National Weather Service Los Angeles/Oxnard California 
130 PM PDT Friday Oct 10 2008 


Short term (today-mon)...upper low dropping south through northern California 
bringing snow to the northern Sierra is expected to be centered over southern 
Nevada Sat morning. With this trajectory being a little farther west 
than earlier models had indicated, it appears that the core of 
strongest winds aloft will also be farther west over the ocean and 
western sba County. For this reason have left the High Wind Warning 
in effect for the sba County mountains. However, further east over 
the vtu/la County mountains the support aloft isn't quite as strong 
and with the exception of the usual one or two sites above the 
Interstate 5 corridor which will still gust at or above 60 tonight, 
the vast majority of the vtu/la mountains should be below warning levels. 
Other areas in the Wind Advisory include the Antelope Valley, 
central coast, and southern sba County. 


Another issue to watch tonight is the possibility for showers across 
extreme eastern la County, particularly the San Gabriel Mountains models 
are pretty dry across the area but with heights rapidly falling and 
strong cold air advection it won't take much to generate a shower or 
two. Have decided to add a slight chance of showers to the eastern san 
Gabriels and some clouds and 10 probability of precipitation to the eastern San Gabriel valley 
tonight just in case. 


Winds will start to taper off Saturday morning but remain breezy in 
most areas through the day. It will be a cool day everywhere, 
especially in the mountains and Antelope Valley, with highs 15-25 degrees 
below normals. 


Patchy frost is possible during the early morning hours each of the 
next few days across interior slow County and the Cuyama Valley as 
winds drop off and cold air settles in. In the Antelope Valley winds 
will be too strong tonight to get frost, but lows will likely dip to 
near 30 sun and Monday mornings. 


Gradients will start turning offshore Sat night with weak northeast 
winds developing in the mountains and valleys late Sat night and Sunday. 
The offshore flow and warm air advection will cause temperatures to warmup 
several degrees Sunday, but highs still will be 5-10 degrees below 
normal, especially over the mountains and deserts where the warming trend 
will be much slower to take hold. 


Offshore flow really increases Sunday night and Monday morning. 
Northeast winds are expected to reach advisory levels in the vtu/la 
valleys and perhaps the coast as well, and possibly low end warning 
levels in the la/vtu mountains warming trend to continue with highs up 
5-10 degrees from sunday's levels. 


Long term (tue-fri)...gradients remain strongly offshore Tuesday 
but upper support is weaker so winds are not expected to be quite as 
strong. However, the warming trend will continue with highs well 
into the 80s and lower 90s for most coastal and valley areas. High 
pressure starts to break down Wednesday and Thursday but gradients are expected 
to remain at least weakly offshore so skies are expected to remain 
clear and highs at or above normals in most areas. May have some 
cooling right at the coast due to an earlier sea breeze, otherwise 
temperatures should remain about the same. A little more cooling expected 
Friday as models show a trough over California. 


&& 


Aviation...10/2020z. 


Other than a few clouds in eastern la County...skies were clear 
across the forecast area. Skies will likely remain clear through 
Saturday at all the taf sites. The only weather concern will be 
locally gusty winds and possible low level wind shear at the favored 
locations...such as kbur...kvny...and ksba. 


Klax...high confidence in clear skies through Thursday. 


Kbur...high confidence in clear skies through Thursday. Low level 
wind shear possible late this afternoon and tonight. 


&& 


Lox watches/warnings/advisories... 
High Wind Warning (see laxnpwlox). 
Red flag warning (see laxrfwlox). 
Fire Weather Watch (see laxrfwlox). 
Wind Advisory (see laxnpwlox). 
Gale Warning (see laxmwwlox). 
Small Craft Advisory (see laxmwwlox). 
Special Weather Statement (see laxspslox). 


&& 


$$ 


Public...Wofford 
aviation...Sweet 


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