Small Craft Advisory 230, NWS San Francisco Bay Area, CA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
230 AM PDT FRI APR 1 2011

.DISCUSSION...AS OF 2:30 AM PDT FRIDAY...IT IS VERY MILD THIS
MORNING ACROSS THE CWA. IN FACT TEMPERATURES HAVE WARMED SINCE
MIDNIGHT HERE IN MONTEREY AND IT IS 60 DEGREES NOW. AROUND THE
DISTRICT TEMPERATURES ARE CURRENTLY RANGING FROM THE MID 50S TO
LOWER 60S...GENERALLY A FEW DEGREES WARMER THAN YESTERDAY AT THIS
TIME. THE UPPER RIDGE THAT HAS BROUGHT RECORD WARMTH TO THE AREA
WILL BEGIN WEAKENING AND EDGE EASTWARD TODAY AS AN UPPER TROUGH
APPROACHES THE COAST FROM THE WEST. THIS TROUGH WILL SWITCH THE
WIND DIRECTION FROM OFFSHORE TO ONSHORE AND ALSO BRING SHARPLY
COOLER TEMPERATURES TO THE AREA. HIGHS TODAY ARE EXPECTED TO BE JUST
SLIGHTLY COOLER THAN THOSE ON THURSDAY...BUT BY SATURDAY HIGHS ARE
EXPECTED TO BE 10 TO 15 DEGREES COOLER THAN THOSE TODAY. MOISTURE
WITH THIS TROUGH SHOULD REMAIN TO THE NORTH...BUT A SLIGHT CHANCE
OF RAIN IS STILL POSSIBLE ACROSS MAINLY THE NORTH BAY ON SATURDAY
AND SATURDAY NIGHT. BY SUNDAY HIGH PRESSURE WILL BEGIN REBUILDING
OVER THE EASTERN PACIFIC WITH WARMER TEMPERATURES AGAIN BY MONDAY
AND TUESDAY. ANOTHER WEAK TROUGH TO BRING RAIN CHANCES TO THE
DISTRICT ON WEDNESDAY WITH ANOTHER SYSTEM POSSIBLE FOR LATE IN THE
WEEK.

&&

.MARINE...AS OF 2:30 PM PDT THURSDAY...A STORM SYSTEM WILL MOVE
THROUGH EARLY IN THE WEEKEND FOLLOWED BY BUILDING HIGH PRESSURE ON
SATURDAY. MODEL GUIDANCE CONTINUES TO SHOW THAT NORTHERLY WINDS WILL
INCREASE RAPIDLY SATURDAY AFTERNOON...WITH GALE FORCE GUSTS TO 35
KNOTS POSSIBLE. THE STRONGEST WINDS WILL OCCUR OVERNIGHT SATURDAY
INTO SUNDAY AFTERNOON...WITH GALE FORCE GUSTS TO OVER 40 KNOTS
POSSIBLE. STRONGEST WINDS WILL BE OVER THE OUTER WATERS. WINDS WILL
REMAIN STRONG THROUGH AT LEAST MONDAY MORNING BEFORE DIMINISHING
SIGNIFICANTLY.

IN ADDITION TO STRONG WINDS...NORTH TO NORTHWEST SEAS WILL BUILD
THROUGH THE WEEKEND.  THE LARGEST SWELLS WILL OCCUR OVERNIGHT
SATURDAY NIGHT INTO SUNDAY...WHEN COMBINED SEAS REACH 15 TO 17 FEET.
SEAS WILL BEGIN TO SUBSIDE LATE SUNDAY INTO MONDAY.

WEATHER CONDITIONS OVER THE COASTAL WATERS WILL BE HAZARDOUS TO
MARINERS OVER THE WEEKEND. STRONG WINDS AND CHAOTIC SEAS WILL OCCUR
AND MARINERS ARE URGED TO MONITOR THE FORECAST FOR THE LATEST
INFORMATION.

&&

.AVIATION...AS OF 10:30 PM PDT THURSDAY...VFR. LIGHT WINDS.

VICINITY OF KSFO...VFR.

KSFO BRIDGE APPROACH...VFR.

MONTEREY BAY AREA TERMINALS...VFR.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TDA...SCA...PT ARENA TO PIGEON PT 10-60 NM.
               ...PT ARENA TO PT REYES 0-10 NM.
&&

PUBLIC FORECAST: SIMS
AVIATION/MARINE: 17