065
FXUS66 KMTR 301933
AFDMTR
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
1233 PM PDT SUN AUG 30 2026
..NEW SHORT TERM, LONG TERM
KEY MESSAGES
UPDATED AT 1232 PM PDT SUN AUG 30 2026
- SLIGHT CHANCE FOR COASTAL DRIZZLE DURING THE NIGHT AND MORNING
HOURS THROUGH TUESDAY MORNING
- COOLING TREND CONTINUES THROUGH AT LEAST MIDWEEK
SHORT TERM
ISSUED AT 1232 PM PDT SUN AUG 30 2026
(THIS EVENING THROUGH MONDAY NIGHT)
STRATUS HAS RETREATED TO THE COAST AS OF EARLY AFTERNOON WITH
MOSTLY SUNNY SKIES ACROSS THE INTERIOR. THUS, TEMPERATURES INLAND
TEMPERATURES WILL WARM INTO THE 70S TO MID 80S AND THE LOWER 90S
ACROSS THE FAR INTERIOR. MEANWHILE, PERSISTENT ONSHORE FLOW AND
THE MARINE LAYER WILL MAINTAIN COOLER CONDITIONS NEAR THE COAST,
GENERALLY REACHING INTO THE 60S.
THE MARINE LAYER IS LIKELY TO DEEPEN OVERNIGHT TO AROUND 2000
FEET AND WITH AN INCREASED POTENTIAL FOR COASTAL DRIZZLE TONIGHT
AND INTO MIDMORNING ON MONDAY. EXPECTING A SLOWER CLEARING OF
STRATUS MONDAY MORNING AS TROUGHING OFF OF THE PACIFIC NORTHWEST
COAST DEVELOPS AND DEEPENS. AS SUCH, AFTERNOON MAXIMUM
TEMPERATURES WILL BE 5 TO 15 DEGREES BELOW AVERAGE. HEADING INTO
MONDAY NIGHT, ANOTHER ROUND OF NIGHT/MORNING DRIZZLE IS EXPECTED
ALONG THE COAST AND IN THE FAVORED UPSLOPE REGIONS.
LONG TERM
ISSUED AT 1232 PM PDT SUN AUG 30 2026
(TUESDAY THROUGH NEXT SATURDAY)
TUESDAY IS NOW FORECAST TO BE THE COOLEST DAY OF THE WEEK WITH
AFTERNOON TEMPERATURES SOME 10 TO 20 DEGREES BELOW NORMAL FOR THIS
TIME OF YEAR. TEMPERATURES REMAIN BELOW SEASONAL AVERAGES
THROUGHOUT MUCH OF NEXT WEEK WITH THE POTENTIAL FOR RAIN
PARTICULARLY ACROSS THE NORTH BAY LATE WEEK AS A WEAK FRONTAL
BOUNDARY SAGS SOUTHWARD ACROSS THE REGION. THIS IS AS A CUT-OFF
LOW DEVELOPS OFF OF THE NORTHERN CALIFORNIA COAST TUESDAY WITH
TROUGHING PERSISTING THROUGH THE REMAINDER OF THE WEEK AND
POTENTIALLY INTO NEXT WEEKEND. STILL KEEPING AN EYE ON THE
TROPICAL EASTERN PACIFIC AS IT REMAINS FAIRLY ACTIVE FOR ANY
MOISTURE THAT MAY BE BROUGHT NORTHWARD INTO CALIFORNIA.
AVIATION
(18Z TAFS)
ISSUED AT 1143 AM PDT SUN AUG 30 2026
WIDESPREAD VFR WITH CLEAR SKIES PREVAILS THIS AFTERNOON AS MODERATE
ONSHORE WINDS INCREASE. THE MARINE LAYER WAS ABOUT 200 FEET DEEPER
THIS MORNING COMPARED TO YESTERDAY (1400 FT TO 1600 FT) AND WILL
CONTINUE TO DEEPEN TONIGHT, RESULTING IN MVFR CEILINGS AT MOST
TERMINALS. LOW CONFIDENCE ON WHETHER STRATUS WILL REACH THE INTERIOR
EAST AND SOUTH BAY VALLEY TERMINALS, THEREFORE THE TAF HINTS AT THE
POTENTIAL WITH SCT DECKS. COASTAL SITES DEVELOP LOW-END MVFR
CEILINGS AROUND SUNSET, MEANWHILE THE REST OF THE SITES DEVELOP MVFR
CEILINGS OVERNIGHT. STRATUS SHOULD RECEDE TO THE COAST BY LATE
MONDAY MORNING. OVERALL, MEDIUM CONFIDENCE ON THE EXACT ARRIVAL OF
STRATUS.
VICINITY OF SFO...VFR PREVAILS THIS AFTERNOON WITH MODERATE WESTERLY
BREEZES. DECREASED POTENTIAL FOR STRONG GUSTS THIS AFTERNOON, THOUGH
CANNOT FULLY RULE OUT AN OCCASIONAL 20 KT GUST. AS WINDS EASE
OVERNIGHT, MVFR STRATUS IS EXPECTED TO DEVELOP AT BOTH SFO AND OAK
WHICH THEN PERSIST UNTIL LATE MONDAY MORNING AS MODERATE WINDS
INCREASE.
SFO BRIDGE APPROACH...SIMILAR TO SFO.
MONTEREY BAY TERMINALS...NORTHWEST TO WEST WINDS PREVAIL THROUGH THE
TAF PERIOD. VFR CONDITIONS THIS AFTERNOON WITH MEDIUM CONFIDENCE FOR
MVFR CEILINGS TO DEVELOP RIGHT BEFORE SUNSET, THOUGH THEY MAY ARRIVE
AS LATE AS 9 PM PDT TONIGHT. STRATUS PERSISTS OVERNIGHT WITH THE
POTENTIAL FOR COASTAL DRIZZLE EARLY MONDAY MORNING. IF COASTAL
DRIZZLE OCCURS, ANTICIPATE A REDUCTION TO VISIBILITY AROUND 4-6SM.
MARINE
(TODAY THROUGH FRIDAY)
ISSUED AT 918 AM PDT SUN AUG 30 2026
NORTHWEST BREEZES REMAIN FRESH WITH STRONG TO NEAR GALE FORCE
GUSTS TODAY AND GRADUALLY DIMINISH TO GENTLE BREEZES BY MONDAY.
WIND DRIVEN ROUGH SEAS SUBSIDE TO MODERATE BY MONDAY INTO THE REST
OF THE WEEK. THE LONG PERIOD SOUTHERLY SWELL ALSO DECREASES TODAY
INTO EARLY MONDAY MORNING.
MTR WATCHES/WARNINGS/ADVISORIES
CA...NONE.
PZ...SMALL CRAFT ADVISORY UNTIL 3 AM PDT MONDAY FOR PT ARENA TO PT
REYES 0-10 NM.
SMALL CRAFT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR PIGEON PT
TO PT PINOS 10-60 NM-PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM.
SMALL CRAFT ADVISORY UNTIL 9 AM PDT MONDAY FOR PT ARENA TO PT
REYES 10-60 NM.
SHORT TERM...RGASS
LONG TERM....RGASS
AVIATION...NAVARRETE
MARINE...NAVARRETE
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