538
FXUS66 KMTR 010803
AFDMTR
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
103 AM PDT WED APR 1 2026
..NEW SHORT TERM, LONG TERM
KEY MESSAGES
UPDATED AT 102 AM PDT WED APR 1 2026
- COOLER CONDITIONS CONTINUE THROUGH THURSDAY.
- LIGHT RAIN TODAY THROUGH EARLY THURSDAY MORNING.
- A WARMING TREND BEGINS ON FRIDAY AND CONTINUES INTO THE
WEEKEND.
- OFFSHORE FLOW RETURNS FRIDAY, WITH 40-50MPH WIND GUSTS EXPECTED
FOR INTERIOR NORTH BAY MOUNTAINS.
SHORT TERM
ISSUED AT 102 AM PDT WED APR 1 2026
(TODAY AND TONIGHT)
THE NEXT ROUND OF BENEFICIAL RAIN WILL MOVE INTO THE NORTH BAY
DURING THE MORNING HOURS AND WILL GRADUALLY SPREAD SOUTH THE CENTRAL
COAST BY THE LATE AFTERNOON AND EVENING HOURS. AMOUNTS HAVE COME UP
SINCE THE LAST FORECAST, WITH THE NORTH BAY MOUNTAINS HAVING THE
POTENTIAL TO SEE UP TO 0.25-0.75", UP TO 1.0" FOR THE INTERIOR
RANGES, AND AROUND 0.10-.25" OF RAIN FOR THE VALLEYS. THE SAN
FRANCISCO PENINSULA TO SANTA CRUZ COUNTY IS FORECAST TO SEE AROUND
0.1-.30" WITH UP TO 0.5" FOR THE SANTA CRUZ MOUNTAINS. INTERIOR EAST
AND SOUTH BAY VALLEYS WILL BE CLOSE TO 0.05-0.15" OF RAIN, WHILE THE
DIABLO RANGE AND THE BERKELEY AND SAN LEANDRO HILLS MAY SEE UP TO
0.5". FOR INTERIOR MONTEREY AND SAN BENITO COUNTIES, AMOUNTS WILL BE
LOWER AND IN THE 0.0-0.15" RANGE WHILE ALONG THE COAST AND INTO THE
SANTA LUCIAS AMOUNTS FROM 0.10-0.30". IF TRAVELING TODAY, BE MINDFUL
THAT THE ROADWAYS MAY BE SLICK.
IN ADDITION TO THE RAIN, SOUTHWESTERLY WINDS WILL GRADUALLY PICK UP
AND BECOME BREEZY WITH GUSTS UP TO 20-30 MPH, UP TO 40 MPH IN AREAS
OF HIGHER TERRAIN. WINDS ARE EXPECTED TO BECOME WEST-NORTHWEST
WINDS EXPECTED BY LATE WEDNESDAY INTO EARLY THURSDAY MORNING.
LONG TERM
ISSUED AT 102 AM PDT WED APR 1 2026
(THURSDAY THROUGH TUESDAY)
CONDITIONS BEGIN TO DRY UP ON THURSDAY, AS COLD FRONT EXITS THE
REGION AND THE PARENT UPPER LOW MOVES INTO THE INTERMOUNTAIN WEST.
HIGH PRESSURE BUILDS INTO THE EASTERN PACIFIC WHICH WILL BING DRIER
INTO THE REGION. THE PRESSURE GRADIENT BETWEEN THESE TWO SYSTEM WILL
TIGHTEN ON FRIDAY, BRINGING WARMING TEMPERATURES AND GUSTY OFFSHORE
WINDS. THE STRONGEST WINDS WILL BE ACROSS THE NORTH BAY INTERIOR
MOUNTAINS AND EAST AND SOUTH BAY MOUNTAINS WITH 40-50MPH WIND GUSTS
EXPECTED FOR INTERIOR NORTH BAY MOUNTAINS. WARMER WEATHER CONTINUES
INTO THE WEEKEND.
AVIATION
(06Z TAFS)
ISSUED AT 939 PM PDT TUE MAR 31 2026
VFR IS EXPECTED TO PREVAIL UNTIL EARLY WEDNESDAY MORNING IN THE
WAKE OF SCATTERED SHOWERS ACROSS OUR AREA EARLIER TODAY. ONE
EXCEPTION IS KAPC THAT IS ALREADY MVFR AND IS EXPECTED TO REMAIN
SO THROUGH THE FORECAST PERIOD. KSTS WILL FOLLOW SUIT LATER DURING
THE OVERNIGHT HOURS.
VICINITY OF SFO...BAY AREA TERMINALS ARE EXPECTED TO BE VFR UNTIL
LATER IN THE OVERNIGHT HOURS WHEN CIGS DROP TO MVFR AND ARE
EXPECTED TO REMAIN MVFR THROUGH THE REMAINDER OF THE FORECAST
PERIOD. LIGHT RAIN WILL INCREASE IN COVERAGE FROM LATE MORNING
THROUGH THE AFTERNOON HOURS WITH BREEZY SOUTHWEST WINDS OUT AHEAD
OF A COLD FRONT THAT ARRIVES LATER WEDNESDAY NIGHT.
SFO BRIDGE APPROACH...SIMILAR TO SFO.
MONTEREY BAY TERMINALS...VFR IS EXPECTED TO PREVAIL THROUGH THE
FORECAST PERIOD WITH A CHANCE OF MVFR CIGS IN THE HOURS
SURROUNDING SUNRISE. THERE IS A SLIGHT CHANCE OF LIGHT RAIN LATE
IN THE TAF PERIOD BUT CONFIDENCE IS TOO LOW FOR MENTION IN THE TAF
ATTM.
MARINE
(TONIGHT THROUGH NEXT MONDAY)
ISSUED AT 939 PM PDT TUE MAR 31 2026
FRESH TO MODERATE SOUTHWESTERLY BREEZES TONIGHT OUT AHEAD OF A
COLD FRONT WILL BECOME NORTHWEST BEHIND THE COLD FRONT AS IT
PASSES THROUGH OUR AREA LATE IN THE DAY WEDNESDAY INTO THE EVENING
HOURS. STRONG NORTHERLY BREEZES WILL DEVELOP BY THURSDAY
AFTERNOON AND PERSIST THROUGH FRIDAY WITH MODERATE SEAS BUILDING
TO BECOME ROUGH WITH WIDESPREAD HAZARDOUS CONDITIONS. CONDITIONS
IMPROVE FOR THE WEEKEND.
MTR WATCHES/WARNINGS/ADVISORIES
CA...NONE.
PZ...SMALL CRAFT ADVISORY FROM 3 PM THIS AFTERNOON TO 3 AM PDT FRIDAY
FOR MRY BAY-PIGEON PT TO PT PINOS 0-10 NM-PIGEON PT TO PT
PINOS 10-60 NM-PT ARENA TO PT REYES 0-10 NM-PT ARENA TO PT
REYES 10-60 NM-PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM-PT
REYES TO PIGEON PT 0-10 NM-SF BAY N OF BAY BRIDGE.
SHORT TERM...KR
LONG TERM....KR
AVIATION...JM
MARINE...JM
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