Area Forecast Discussion
Issued by NWS Los Angeles, CA

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FXUS66 KLOX 261205
AFDLOX

SOUTHWEST CALIFORNIA AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
350 AM PDT SUN APR 26 2015

AVIATION DISCUSSION UPDATED

.SYNOPSIS...

THE GUSTY WINDS WILL SHIFT MORE NORTHERLY TODAY...AND THEN NORTHEAST
BY MONDAY AS HIGH PRESSURE MOVES IN. THIS HIGH AND OFFSHORE WINDS
WILL BRING FAIR SKIES AND ABOVE NORMAL TEMPERATURES INTO MIDWEEK.
BUT THE LAST HALF OF THE WEEK WILL HAVE A COOLING TREND WITH AN
INCREASING MARINE LAYER AS A LOW APPROACHES.

&&

.SHORT TERM (TODAY-TUE)...
CALIFORNIA IS ON THE EAST SIDE OF LARGE EAST PAC RIDGE THAT EXTENDED
INTO BRITISH COLUMBIA. A DECENT NW SFC GRADIENT EXISTS BETWEEN A
LARGE EAST PACK SFC HIGH AND YESTERDAYS SFC LOW WHICH IS CURRENTLY
IN EASTERN AZ. THIS NW FLOW WILL SUSTAIN LOW END WARNING LEVEL GUSTS
IN THE VTA AND LA MTNS THIS MORNING AS WELL AS ADVISORY LEVEL GUSTS
IN THE SANTA CLARITA VLY...THE SAN FERNANDO VLY AND THE SANTA MONICA
MTNS THROUGH THIS MORNING. THESE WINDS ARE ALSO PUSHING CLOUDS INTO
THE MTN NORTH SLOPES SOME OF WHICH ARE SPILLING INTO THE CUYAMA
VALLEY. LOW END WIND WARNING GUST TO 60 MPH WILL PERSIST IN THE
MOUNTAINS THROUGH MID MORNING. WIND ADVISORIES WILL LIKE FOLLOW
CLOSE ON THE HEALS OF THE WARNING AS ANOTHER ROUND OF NORTH WINDS IS
EXPECTED TONIGHT AS A SFC HIGH MOVES ACROSS THE TOP OF THE STATE. AN
ADVISORY LEVEL SANTA ANA WIND EVENT IS FORECAST MONDAY MORNING AS
THE SFC HIGH MOVES INTO NEVADA AND SETS UP A STRONG NW GRADIENT.
WHEN THE HIGH IS OVER MT SHASTA THIS EVENING THE NORTH GRADIENTS
WILL BE STRONG ENOUGH TO PRODUCE A SUNDOWNER WITH ADVISORY LEVEL
GUSTS ACROSS THE SBA SOUTH COAST. MAX TEMPS WILL JUMP TODAY TO NEAR
NORMAL VALUES WITH THE NORTH FLOW AN THE INCREASING HGTS.

MONDAY WILL BE SUNNY AND BREEZY WITH A DECENT SANTA ANA IN PLACE.
LOOK FOR 50 TO 55 MPH GUSTS IN THE MTNS AND 40 MPH GUSTS IN THE
SANTA ANA WIND PRONE AREAS IN THE VLYS. THE RIDGE WILL CONTINUE TO
INCREASE AND WITH THE OFFSHORE FLOW MAX TEMPS WILL SOAR. THERE WILL
LIKELY BE A FEW 90 DEGREE READINGS ALONG WITH PLENTY OF HIGHS IN THE
80S.

JUST A LITTLE BIT WEAKER IN ALL REGARDS TUESDAY. LESS OFFSHORE
FLOW...LESS RIDGING. THIS WILL MAKE FOR A COOLER BUT STILL ABOVE
NORMAL DAY UNDER MOSTLY SUNNY SKIES.

.LONG TERM (WED-SAT)...
EXCITEMENT LEVELS LOW FOR THE EXTENDED FORECAST. THE UPPER RIDGE
WILL BE REPLACED BY A SLOWLY DEVELOPING TROF AND THE OFFSHORE FLOW
WILL TURN ONSHORE AND SLOWLY STRENGTHEN DURING THE PERIOD. THERE
WILL BE A LITTLE MARINE LAYER STRATUS WEDNESDAY PROBABLY CONFINED TO
THE LONG BEACH TORRANCE AREA...THE A LITTLE MORE THURSDAY. IT WILL
WILL TAKE TO FRIDAY FOR THE MARINE LAYER STRATUS PATTERN TO FULLY
DEVELOP AND OVERSPREAD THE COASTS AND INTO MOST OF THE VLYS. THIS
CLOUDY PATTERN WILL PERSIST INTO SATURDAY. MAX TEMPS WILL FALL SOME
EACH DAY REACHING NORMAL VALUES FRIDAY.

&&

.AVIATION...26/12Z.

AT 0840Z AT KLAX... THE INVERSION WAS SURFACE BASED WITH A DEPTH OF
1050 FEET AND A TEMPERATURE OF FIFTEEN DEGREES CELSIUS AT THE TOP.

OVERALL... MODERATE TO HIGH CONFIDENCE IN THE 12Z TAFS.  PATCHY MVFR
CONDITIONS MAY DEVELOP WHILE WINDS HAVE EASED OVERNIGHT... PRIMARILY
AT SAN LUIS OBISPO COUNTY SITES.  ELEVATED WINDS AT KWJF AND KPMD
WILL PERSIST INTO TOMORROW MORNING THEN INCREASE AGAIN IN THE
AFTERNOON.  OTHERWISE AND ELSEWHERE CONDITIONS WILL BE VFR.

KLAX...MODERATE TO HIGH CONFIDENCE IN THE 12Z TAF.  WINDS WILL
INCREASE AGAIN BY MIDDAY BUT CONDITIONS WILL BE VFR THROUGHOUT
THE FORECAST PERIOD.

KBUR...MODERATE TO HIGH CONFIDENCE IN THE 12Z TAF.  WINDS WILL
REMAIN LOW THIS MORNING THEN BECOME BREEZY AGAIN MIDDAY.  CONDITIONS
WILL BE VFR THROUGHOUT THE FORECAST PERIOD.

&&

.MARINE...26/300 AM

GUSTY NORTHWEST WINDS WILL CONTINUE ACROSS THE COASTAL WITH GUSTS OF
35 TO 40 KNOTS IN THE OUTER WATERS AND 20 TO 30 KNOTS IN THE WESTERN
PORTION OF THE INNER WATERS THROUGH MONDAY. THE STRONGEST WINDS WILL
BE THIS AFTERNOON THROUGH EVENING.

STEEP COMBINED SEAS WILL LIKELY BUILD TO 9 TO 12 FEET IN THE OUTER
WATERS AND 6 TO 8 FEET IN THE INNER WATERS THROUGH THE MORNING
HOURS THEN SUBSIDE LATE TONIGHT.

&&

.LOX WATCHES/WARNINGS/ADVISORIES...
HIGH WIND WARNING (SEE LAXNPWLOX).
WIND ADVISORY (SEE LAXNPWLOX).
GALE WARNING (SEE LAXMWWLOX).
SMALL CRAFT ADVISORY (SEE LAXMWWLOX).

&&
$$

PUBLIC...RORKE
AVIATION...KJ
MARINE...KJ
SYNOPSIS...SETO

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