FXUS66 KLOX 201111
AFDLOX
SOUTHWEST CALIFORNIA AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
334 AM PDT SAT SEP 20 2008
.SHORT TERM...LOW CLOUDS HAVE SPREAD INTO THE CENTRAL COAST AND 
ACROSS THE SALINAS VALLEY IN SLO COUNTY EARLY THIS MORNING. 
OTHERWISE...SKIES WERE CLEAR ACROSS THE AREA...ALTHOUGH STRATUS
MOVING RAPIDLY SEWD ACROSS THE COASTAL WATERS WAS BEGINNING TO CURL 
TOWARD THE L.A. COUNTY COAST AS AN EDDY CRCLN TRIES TO DEVELOP.
BLV THAT AT LEAST PATCHY LOW CLOUDS/FOG WILL AFFECT THE L.A. COUNTY 
CST BY DAYBREAK. WITH TEMPS AT 850/950 MB DOWN 2 TO 3 DEGREES C
ACROSS THE AREA...WOULD EXPECT MAX TEMPS TO BE DOWN A FEW DEGREES 
FROM FRI...BELOW NORMAL ACROSS THE AREA FOR THIS TIME OF YEAR. 
LOCALLY GUSTY NW TO NLY WINDS CONTD ACROSS SRN SBA COUNTY THIS
MORNING...BUT WINDS WERE BELOW ADVISORY LEVELS AND SHOULD DIMINISH 
THIS MORNING.
THE UPPER LOW OVER NRN CA WILL OPEN UP AND LIFT NEWD TODAY...BUT A 
BROAD UPPER TROUGH WILL LINGER ACROSS THE AREA THROUGH MONDAY
WITH WKLY CYCLONIC FLOW ALF. AT THE SFC DECENT LOW LVL N-S GRADS
SHOULD CAUSE SOME GUSTY WINDS ACROSS THE CENTRAL COAST AGAIN
THIS AFTERNOON...AND WITH GOOD W-E GRADS...STRONG WESTERLY WINDS
SHOULD AFFECT THE ANTELOPE VALLEY. THERE WILL BE ANOTHER ROUND
OF GUSTY WINDS THRU AND BELOW PASSES AND CANYONS OF SRN SBA COUNTY 
TONIGHT. IT LOOKS AS THOUGH NWLY FLOW WILL BECOME MORE WDSPRD ACROSS 
THE MTNS OF L.A./VTU COUNTIES TONIGHT...SO EXPECT LOCALLY STRONG 
WINDS NEAR THE INTERSTATE 5 CORRIDOR TONIGHT/SUN MORNING. IT LOOKS 
AS THOUGH WINDS WILL REMAIN BELOW ADVISORY LEVELS IN MOST AREAS.
UPSLOPE NLY FLOW SHOULD BRING SOME LOW CLOUDS TO THE NRN SLOPES OF 
THE L.A/VTU COUNTY MTNS TONIGHT/SUN MORNING. THE WRF SHOWS A 
STRONGER EDDY CRCLN TONIGHT/SUN MORNING...WITH MORE IN THE WAY OF 
LOW CLDS/FOG IN CSTL SXNS OF L.A. AND PROBABLY VTU COUNTIES. CLOUDS 
SHOULD AGAIN BE FAIRLY WDSPRD ON THE CENTRAL COAST AND IN THE SANTA 
YNEZ/SALINAS VALLEYS. WITH THE EDDY CRCLN...SOME CLOUDS MAY PUSH 
INTO THE SAN GABRIEL AND POSSIBLY SAN FERNANDO VALLEYS LATE TONIGHT 
INTO SUN MORNING. WITH LITTLE CHANGE IN HGTS/THICKNESSES ACROSS THE 
AREA ON SUN...EXPECT LITTLE CHANGE IN MAX TEMPS IN THE MTNS AND 
DESERTS. ADDITIONAL SLIGHT COOLING AT 950 MB SHOULD BRING SLIGHT 
COOLING TO COASTAL AND VALLEY AREAS ON SUNDAY. 
THE WRF SHOWS SOMEWHAT WEAKER N-S GRADS AND NWLY LOW LVL FLOW SUN 
NIGHT/MON...SO EXPECT LESS IN THE WAY OF WINDS IN THE MTNS AND 
ACROSS THE SANTA YNEZ RANGE AND THE SBA COUNTY S CST. THERE MAY BE
SLIGHTLY DEEPER INLAND PENETRATION OF THE STRATUS SUN NIGHT/MON.
WITH HEIGHTS/THICKNESSES BEGINNING TO EDGE UPWARD ON MON...THERE MAY 
BE A FEW DEGREES OF WARMING IN THE MTNS AND DESERTS...BUT WITH 950 
MB TEMPS CHANGING LITTLE...EXPECT LITTLE CHANGE IN BELOW NORMAL MAX 
TEMPS W OF THE MTNS FOR MON. 
.LONG TERM...HEIGHTS WILL RISE ACROSS THE AREA TUE AS A FLAT RIDGE 
BUILDS ALONG THE W CST. AT THE SAME TIME...LOW LVL ONSHORE GRADS 
WILL WEAKEN. EXPECT THE MARINE LAYER TO BECOME MORE SHALLOW MON 
NIGHT/TUE...WITH CLOUDS PROBABLY CONFINED TO THE CSTL PLAIN. MAX 
TEMPS SHOULD BE UP A FEW DEGREES IN MOST AREAS ON TUE...MOST 
NOTICEABLY IN THE VLYS. MODELS ARE A BIT DIFFERENT WITH THE UPPER 
PATTERN LATER IN THE WEEK...SPECIFICALLY WITH THE PLACEMENT OF THE 
UPPER HIGH WHICH IS NOW FCST TO BE SE OF THE FCST AREA AS OPPOSED TO 
RIGHT OVER THE AREA. HEIGHTS ARE STILL RATHER HIGH...AND MODELS 
STILL SHOW WEAK OFFSHORE TO NEUTRAL LOW LVL FLOW...AT LEAST WED AND 
THU MORNINGS. THEREFORE...STILL EXPECT SIGNIFICANT WARMING ON WED... 
ESPECIALLY IN THE VALLEYS...WHERE TEMPS SHOULD RISE WELL INTO THE 
90S IN WARMER LOCATIONS...THEN IT WILL CONT TO BE RATHER WARM THU 
AND FRI. MARINE LAYER SHOULD BE RATHER MINIMAL IN COVERAGE WED THRU 
MORNING...CONFINED MAINLY TO AREAS WITHIN A FEW MILES OF THE CST. 
&&
.AVIATION...20/1115Z. WILL BE UPDATED SHORTLY.
&&
.LOX WATCHES/WARNINGS/ADVISORIES...
SMALL CRAFT ADVISORY (SEE LAXMWWLOX).
&&
$$
PUBLIC...BRUNO
AVIATION...HALL
WWW.WEATHER.GOV/LOSANGELES