868  
FXUS66 KMTR 101612  
AFDMTR  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE SAN FRANCISCO CA  
912 AM PDT SUN AUG 10 2025  
   
..NEW UPDATE, MARINE, FIRE WEATHER  
 
   
KEY MESSAGES  
 
UPDATED AT 200 AM PDT SUN AUG 10 2025  
 
- MODERATE HEATRISK CONTINUES THROUGH MONDAY FOR PORTIONS OF NORTH,  
EAST, AND SOUTH BAY COUNTIES AND INTERIOR MONTEREY AND SAN BENITO  
COUNTIES.  
 
- ELEVATED FIRE WEATHER CONCERNS PERSIST GIVEN THE WARM AND DRY  
CONDITIONS, WITH BREEZY WINDS EACH AFTERNOON AND EVENING.  
 
- PATTERN CHANGE TUESDAY, WITH COOLER WEATHER AND COASTAL DRIZZLE  
RETURNING TO THE FORECAST.  
 
 
   
UPDATE  
 
ISSUED AT 906 AM PDT SUN AUG 10 2025  
 
SATELLITE IMAGERY SHOWS STRATUS MIXING OUT ACROSS THE COASTAL  
VALLEYS, WITH HIGH-LEVEL SMOKE FROM THE GIFFORD FIRE DRIFTING  
NORTHWARD THROUGH THE CENTRAL COAST AND THE BAY AREA. PATCHY DENSE  
FOG WAS REPORTED EARLIER THIS MORNING, WITH MORE RECENT REPORTS  
SHOWING CONDITIONS IMPROVING ACROSS THE REGION. OTHERWISE, THE  
FORECAST REMAINS UNCHANGED WITH HOT AND DRY CONDITIONS BEING THE  
MAIN AREA OF FOCUS FOR THE NEXT COUPLE OF DAYS.  
 
DIALH  
 
 
   
SHORT TERM  
 
ISSUED AT 200 AM PDT SUN AUG 10 2025  
(TODAY AND TONIGHT)  
 
STARTING ANOTHER FORECAST DISCUSSION, WITH YOU GUESSED IT, SATELLITE  
OBSERVATION! THE PICTURE FROM SPACE SHOWS THE STRATUS HAS SPREAD  
SUBSTANTIALLY FARTHER INLAND, INFILTRATING PORTIONS OF THE NORTH,  
EAST, AND SOUTH BAY REGIONS AND A GOOD PORTION OF THE CENTRAL COAST.  
STRATUS WILL CONTINUE TO SNAKE IT'S WAY INTO THE REGION THIS MORNING,  
BEFORE QUICKLY RETREATING BACK TO THE COAST AFTER SUNRISE. IT'S  
ANOTHER, WASH, RINSE, REPEAT FORECAST! SUNNY SKIES AND SUMMER HEAT  
RETURNS FOR INTERIOR LOCATIONS, AS TEMPERATURES RISE INTO THE LOW  
90S TO NEAR 103. IF YOU PLAN ON BEING OUTDOORS IN THIS HEAT, WHETHER  
FOR WORK OR FOR PLAY, PLEASE CONSIDER TAKING SOME HEAT SAFETY  
ACTIONS. CONSIDER WEARING SUNSCREEN, TAKING BREAKS, STAYING  
HYDRATED, REDUCING YOUR TIME OUTDOORS, OR WEARING LIGHTER AND/OR  
LOOSER FITTED CLOTHING.  
 
 
   
LONG TERM  
 
ISSUED AT 200 AM PDT SUN AUG 10 2025  
(MONDAY THROUGH SATURDAY)  
 
WARMER INLAND WEATHER CONTINUES THROUGH MONDAY, WITH A PATTER CHANGE  
BEGINNING ON TUESDAY. UPPER LEVEL RIDGING BREAKS DOWN AS AN UPPER  
LEVEL TROUGH MOVES INTO THE PACNW. WIDESPREAD COOLING IS EXPECTED BY  
WEDNESDAY AND WILL CONTINUE THROUGH FRIDAY, MODERATING SOME BY THE  
WEEKEND. TROUGHING WILL LEAD TO WIDESPREAD STRATUS AND DRIZZLE  
DURING THE OVERNIGHT AND EARLY MORNING HOURS.  
 
 
   
AVIATION  
 
(12Z TAFS)  
ISSUED AT 433 AM PDT SUN AUG 10 2025  
 
CURRENTLY A MIXED BAG OF LIFR-VFR AT THE TERMINALS WITH A MARINE  
LAYER OF ABOUT 1,300 FEET. WITH THE EXCEPTION OF HAF, HIGH  
CONFIDENCE IN WIDESPREAD VFR THIS AFTERNOON WITH LOW STRATUS  
STICKING CLOSE TO THE COAST. LITTLE CHANGE IN THE OVERALL PATTERN  
WILL YIELD SIMILAR CONDITIONS TONIGHT AS WHAT IS CURRENTLY UNDERWAY.  
 
VICINITY OF SFO...CURRENTLY VFR WITH WESTERLY FLOW WITH LOW STRATUS  
QUICKLY CLOSING IN ON THE TERMINAL. HIGH CONFIDENCE IN VFR BY THE  
AFTERNOON WITH MODERATE (40%) CONFIDENCE ON A SUB-VFR CEILING  
LIKELY ON THE CUSP OF MVFR/IFR RETURNING TO THE TERMINAL TONIGHT.  
WESTERLY WINDS WILL PREVAIL THROUGH THE TAF PERIOD.  
 
SFO BRIDGE APPROACH...SIMILAR TO SFO.  
 
MONTEREY BAY TERMINALS...CURRENTLY LIFR WITH NORTHERLY FLOW AT MRY  
AND IFR AND CALM AT SNS. VFR WILL BE ACHIEVED BRIEFLY THIS AFTERNOON  
WITH MODERATE (60%) CONFIDENCE ON CEILINGS ON THE CUSP OF  
LIFR/IFR RETURNING TO BOTH TERMINALS TONIGHT.  
 
 
   
MARINE  
 
(TODAY THROUGH FRIDAY)  
ISSUED AT 906 AM PDT SUN AUG 10 2025  
 
A GENTLE TO MODERATE BREEZE AND MODERATE SEAS WILL PREVAIL THROUGH  
TUESDAY WITH DIURNALLY DRIVEN AFTERNOON SEA BREEZE GUSTS UP TO 25  
KNOTS THROUGH THE DELTA. WINDS INCREASE AND SEAS BUILD WEDNESDAY  
WITH FRESH TO STRONG NORTHWESTERLY BREEZES AND ROUGH SEAS ON TAP  
FOR THE OUTER WATERS AND COASTAL JET REGIONS.  
 
 
   
FIRE WEATHER  
 
ISSUED AT 906 AM PDT SUN AUG 10 2025  
 
NOT MUCH CHANGE TO THE FORECAST FOR THE NEXT COUPLE OF DAYS, WITH  
HOT AND DRY CONDITIONS PERSISTING THROUGH MONDAY AND BREEZY AND  
GUSTY ONSHORE WINDS EACH AFTERNOON AND EVENING, BOTH LEADING TO  
CURING FUELS AND THE POSSIBILITY OF RAPIDLY SPREADING FIRES SHOULD  
ONE START. POOR OVERNIGHT HUMIDITY RECOVERIES IN THE HIGHER  
TERRAIN WILL CONTRIBUTE TO THE FIRE WEATHER THREATS. AS AN UPPER  
LEVEL RIDGE BREAKS DOWN, THE GUSTY AFTERNOON WINDS WILL LINGER,  
POSSIBLE THROUGH THE MIDDLE OF THE UPCOMING WORK WEEK. HOWEVER,  
THE COOLING TEMPERATURES AND DEEPENING MARINE LAYER WILL HELP TO  
MITIGATE FIRE WEATHER THREATS, AND BY THE END OF THE WORK WEEK A  
TROUGH SHOULD BRING TEMPERATURES BELOW SEASONAL AVERAGES ACROSS  
THE REGION.  
 
DIALH  
 
 
   
MTR WATCHES/WARNINGS/ADVISORIES  
 
CA...NONE.  
PZ...SMALL CRAFT ADVISORY FROM 1 PM THIS AFTERNOON TO 11 PM PDT THIS  
EVENING FOR SF BAY N OF BAY BRIDGE.  
 
 
 
 
 
SHORT TERM...KR  
LONG TERM....KR  
AVIATION...SARMENT  
MARINE...CANEPA  
 
VISIT US AT WWW.WEATHER.GOV/SANFRANCISCO  
 
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