FXUS66 KSGX 222121
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
200 PM PST TUE DEC 22 2009
.SYNOPSIS...
STRONG WINDS WILL DECREASE TONIGHT AS A LOW PRESSURE SYSTEM MOVES
OUT OF THE REGION. HIGH PRESSURE ALOFT AND OFFSHORE FLOW WILL BRING
FAIR SKIES AND WARMER WEATHER FOR THE REST OF THE WEEK. LOCAL
OFFSHORE WINDS THROUGH AND BELOW MOUNTAIN CANYONS AND PASSES CAN BE
EXPECTED MAINLY DURING THE MORNINGS WEDNESDAY THROUGH FRIDAY.
ANOTHER WEATHER SYSTEM WILL BRING A CHANCE OF SHOWERS SUNDAY AND
MONDAY.
&&
.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
SHOWERS ENDED THIS MORNING AND SKIES WERE GRADUALLY CLEARING TODAY.
THE WINDS HAVE BEEN STRONG GUSTING OVER 35 MPH AT THE COAST AND IN
THE MOUNTAINS AND DESERTS. THESE WINDS WILL DECREASE TONIGHT BUT
CONTINUE BRISK OVER THE SAN BERNARDINO MOUNTAIN RIDGES AND THE
COASTAL WATERS TONIGHT AS THE FLOW TURNS NORTHERLY. HIGH PRESSURE
ALOFT WILL BUILD WEDNESDAY INTO FRIDAY WITH SOME OFFSHORE SURFACE
PRESSURE GRADIENTS DEVELOPING EACH NIGHT. THEY WILL PRODUCE SOME
OFFSHORE WINDS MAINLY THROUGH AND BELOW THE PASSES AND CANYONS. THAT
OFFSHORE FLOW WILL KEEP US IN A COOLER AIR MASS SO OUR HIGH PRESSURE
WARMING TREND WILL AMOUNT TO TEMPERATURES ONLY PEAKING IN THE 60S
THIS WEEK. OVER THE WEEKEND CLOUDS WILL INCREASE IN ADVANCE OF A WET
LOW PRESSURE SYSTEM APPROACHING FROM THE PACIFIC. YESTERDAY THE GFS
MODEL SHOWED RAIN WHILE THE EURO STAYED MOSTLY DRY. TODAY THE GFS IS
MOSTLY DRY AND THE EURO SHOWS RAIN. FOR NOW WE CARRY A CHANCE OF
RAIN MAINLY FOR LATER SUNDAY AND MONDAY...BUT OF COURSE THE DETAILS
ARE REALLY SKETCHY.
&&
.AVIATION...
222000Z...SCATTERED TO BROKEN LAYERS OF STRATOCU WITH BASES BETWEEN
2500 AND 3500 FEET MSL WILL REMAIN OVER THE AREA THROUGH THE NIGHT
BECOMING MOSTLY CLEAR AROUND SUNRISE ON WEDNESDAY. SOME MOUNTAIN
OBSCUREMENT WILL CONTINUE THROUGH THE NIGHT.
GUSTY WEST TO NORTHWEST WINDS ACROSS THE MOUNTAINS WILL CAUSE
MOUNTAIN WAVE AND ROTOR ACTIVITY OVER THE EASTERN DESERTS NEAR KPSP
AND KTRM THROUGH THE AFTERNOON. GUSTY WEST WINDS CAN BE EXPECTED
MOST AIRPORTS WEST OF THE MOUNTAINS THROUGH THIS AFTERNOON AS WELL.
HORTON
&&
.MARINE...
GALE WARNINGS FOR THE OUTER WATERS AND SMALL CRAFT ADVISORY FOR THE
INNER WATERS WILL CONTINUE THROUGH THE EVENING. WINDS SHOULD
DIMINISH AFTER MIDNIGHT. STEEP SHORT-PERIOD 9 FT SWELL WILL CREATE
HAZARDOUS SEAS THROUGH THE EVENING.
&&
.SGX WATCHES/WARNINGS/ADVISORIES...
WIND ADVISORY UNTIL 9 PM IN THE MOUNTAINS AND DESERTS...SEE
LAXNPWSGX.
GALE WARNING UNTIL 2 AM WEDNESDAY IN THE OUTER COASTAL WATERS...SEE
LAXMWWSGX.
SMALL CRAFT ADVISORY UNTIL 2 AM WEDNESDAY IN THE INNER COASTAL
WATERS...SEE LAXMWWSGX.
MARINE WEATHER STATEMENT UNTIL 4 PM IN THE COASTAL WATERS...SEE
LAXMWSSGX.
&&
$$
PUBLIC...MM
AVIATION/MARINE...HORTON
