000
FXUS66 KSGX 101108
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
310 AM PST WED MAR 10 2010

.SYNOPSIS...
ANOTHER COLD LOW PRESSURE SYSTEM WILL MOVE QUICKLY SOUTHEASTWARD
THROUGH THE GREAT BASIN TODAY BRINGING ANOTHER ROUND OF STRONG GUSTY
NORTHWEST WINDS IN THE MOUNTAINS AND DESERTS. WARMER WITH WEAKER
OFFSHORE WINDS ON THURSDAY. FAIR AND WARMER UNDER HIGH PRESSURE ON
FRIDAY. A TROUGH OF LOW PRESSURE MOVING INLAND TO THE NORTH ON
SATURDAY WILL BRING COOLING AND SOME CLOUDS WITH SLOW WARMING ON
SUNDAY. GREATER WARMING EARLY NEXT WEEK TO WELL ABOVE SEASONAL
AVERAGES AS HIGH PRESSURE BUILDS STRONGLY OVER THE INTERIOR WEST.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

.SHORT TERM (TODAY THROUGH FRIDAY)...
A TROUGH OF LOW PRESSURE ALONG THE PACIFIC NORTHWEST AND NORTHERN
CALIFORNIA WILL MOVE QUICKLY SOUTHEASTWARD AND AMPLIFY THROUGH THE
GREAT BASIN INTO ARIZONA BY LATE AFTERNOON. THE SOUTHERN END OF A
BAND OF MID AND HIGH LEVEL MOISTURE AHEAD OF THIS UPPER TROUGH MOVED
THROUGH NORTHERN PORTIONS OF THE FORECAST AREA DURING THE LATE
EVENING...POSSIBLY BRINGING A FEW FLURRIES OR LIGHT SNOW SHOWERS TO
THE SAN BERNARDINO MOUNTAINS. THE MAIN IMPACT OF THIS TROUGH FOR
SOUTHWEST CALIFORNIA WILL BE TO CONTINUE THE COOL WEATHER TODAY AND
TO BRING ANOTHER ROUND OF STRONG...GUSTY NORTHWEST WINDS FOR THE
MOUNTAINS AND DESERTS THROUGH EARLY EVENING. WARMING TO WITHIN A FEW
DEGREES OF SEASONAL AVERAGES FOR THURSDAY WITH WEAKER OFFSHORE
WINDS. HIGH PRESSURE OVER CALIFORNIA WILL BRING WARMING TO NEAR
SEASONAL LEVELS FOR FRIDAY.

&&

.LONG TERM (SATURDAY THROUGH TUESDAY)...
YET ANOTHER CLOSED LOW PRESSURE SYSTEM WILL MOVE SOUTHEASTWARD
THROUGH THE GREAT BASIN ON SATURDAY AND INTO NEW MEXICO ON SUNDAY.
THIS WILL BRING COOLING AND MORE CLOUDS ON SATURDAY WITH WARMING ON
SUNDAY TO NEAR TO A FEW DEGREES ABOVE SEASONAL AVERAGES. HIGH
PRESSURE BUILDS STRONGLY OVER THE INTERIOR WEST FOR EARLY NEXT WEEK
WHICH SHOULD WARM TEMPERATURES TO SEVERAL DEGREES ABOVE SEASONAL
AVERAGES. COMBINED WITH WEAK OFFSHORE FLOW ON MONDAY...TEMPERATURES
COULD WARM TO NEAR 80 NOT TOO FAR INLAND FROM THE COAST.

&&

.AVIATION...
101030Z...MOSTLY CLEAR TODAY AS A DRY COOL AIR MASS SWEEPS IN FROM
THE NW. SOME RESIDUAL CLOUDS WITH BASE AROUND 4000 FT MAY LINGER ON
THE SAN DIEGO MOUNTAINS THIS MORNING. A BRIEF PERIOD OF 2000 FT
STRATUS IS POSSIBLE OVER KSAN THIS EVENING...OTHERWISE CONTINUED
MOSTLY CLEAR. WINDS WILL INCREASE MID MORNING THROUGH THIS AFTERNOON
OVER THE FLATS. STRONG GUSTY WINDS WILL CONTINUE OVER THE MOUNTAINS
WITH ASSOCIATED UP AND DOWN DRAFTS AND LOW LEVEL WIND SHEAR THROUGH
THE AFTERNOON.CLEAR SKIES AND LIGHT WINDS EXPECTED THURSDAY.

&&

.MARINE...
100400Z...STRONG GUSTY WEST TO NORTHWEST WINDS AND HAZARDOUS SEAS AT
OR ABOVE 10 FT WILL CONTINUE INTO THIS EVENING. WINDS WILL INCREASE
THIS MORNING AND CONTINUE THROUGH AFTERNOON...DECREASING IN THE
EVENING. SMALL CRAFT ADVISORY CONTINUES THROUGH THIS EVENING. SURF
UP TO 6 FEET WILL CONTINUE...DECREASING THURSDAY AND FRIDAY.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...WIND ADVISORY UNTIL 10 PM PST THIS EVENING FOR THE APPLE AND
     LUCERNE VALLEYS...COACHELLA VALLEY...RIVERSIDE COUNTY
     MOUNTAINS...SAN BERNARDINO COUNTY MOUNTAINS...SAN DIEGO
     COUNTY DESERTS...SAN DIEGO COUNTY MOUNTAINS.

PZ...SMALL CRAFT ADVISORY FOR WINDS UNTIL 8 PM PST THIS EVENING FOR
     THE WATERS FROM SAN MATEO POINT TO THE MEXICAN BORDER
     EXTENDING 30 TO 60 NM OUT INCLUDING SAN CLEMENTE ISLAND.

     SMALL CRAFT ADVISORY FOR WINDS UNTIL 8 PM PST THIS EVENING FOR
     THE COASTAL WATERS FROM SAN MATEO POINT TO THE MEXICAN
     BORDER AND OUT 30 NM.


&&

$$

PUBLIC...MARTIN
AVIATION/MARINE...MACKECHNIE

NWS ON THE WEB AT WEATHER.GOV/SANDIEGO

NWS SGX Office Area Forecast Discussion