171  
FXUS66 KMTR 272053  
AFDMTR  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA  
153 PM PDT SAT AUG 27 2016  
   
SYNOPSIS
 
TEMPERATURES WILL REMAIN NEAR TO SLIGHTLY BELOW  
SEASONAL AVERAGES THROUGH EARLY NEXT WEEK BEFORE FURTHER COOLING  
BY MIDWEEK AS AN UPPER LEVEL TROUGH PUSHES INLAND TO OUR NORTH.  
THIS PATTERN WILL CHANGE LITTLE THROUGH LATE NEXT WEEK WITH  
CONTINUE BELOW AVERAGE TEMPERATURES AND WIDESPREAD NIGHT/MORNING  
LOW CLOUDS.  
 

 
   
DISCUSSION...AS OF 01:52 PM PDT SATURDAY
 
THE OVERALL WEATHER  
PATTERN ACROSS THE REGION WILL CHANGE VERY LITTLE THROUGH TONIGHT.  
THIS SHOULD GIVE WAY TO ANOTHER NIGHT OF LOW CLOUDS SPREADING WELL  
INLAND INTO MOST VALLEY LOCATIONS AS THE MARINE LAYER GENERALLY  
REMAINS ABOVE 2,500 FEET IN DEPTH. WITH THIS, EXPECTING A MOSTLY  
UNIFORM CLOUD DECK WITH VERY LITTLE IN THE WAY OF FOG DEVELOPMENT  
OVER INLAND AREAS.  
 
WHILE HIGH PRESSURE BUILDS SLIGHTLY TOWARD THE SOUTHERN AND CENTRAL  
CALIFORNIA COAST FROM THE SOUTHWEST ON SUNDAY, LITTLE CHANGE IS  
ANTICIPATED IN REGARDS TO TEMPERATURES. OVERALL, TEMPERATURES WILL  
REMAIN NEAR TO SLIGHTLY BELOW SEASONAL AVERAGES, ESPECIALLY INLAND.  
AS THE HIGH PRESSURE BUILDS ALOFT, MAY SEE THE MARINE LAYER COMPRESS  
SOME DURING THE DAY SUNDAY AND INTO MONDAY MORNING. AGAIN, THIS  
SHOULD RESULT IN VERY LITTLE CHANGE IN OUR WEATHER CONDITIONS  
THROUGH EARLY NEXT WEEK.  
 
INLAND TEMPERATURES WILL TREND DOWNWARD ON TUESDAY AND THROUGH  
MIDWEEK AS A MID/UPPER LEVEL TROUGH PUSHES INTO NORTHERN  
CALIFORNIA. THE FORECAST MODELS (ESPECIALLY THE GFS) SHOW A SLIGHT  
CHANCE OF PRECIPITATION OVER NORTHERN CALIFORNIA AS THE SYSTEM  
PUSHES INLAND ON TUESDAY. HOWEVER, MOISTURE WILL BE LIMITED ACROSS  
OUR REGION AND CHANCES FOR ANY MEASURABLE RAINFALL OVER THE NORTH  
BAY APPEARS LOW AT THIS TIME. THUS, WILL HOLD OFF ON ADDING A  
MENTION INTO THE FORECAST FOR NOW. HOWEVER, WILL BE WORTH KEEPING  
AN EYE ON IN THE COMING DAYS.  
 
THE LARGER SCALE TROUGH OVER THE WEST COAST WILL DEEPEN SLIGHTLY  
WEDNESDAY INTO THURSDAY AND WILL KEEP TEMPERATURES BELOW SEASONAL  
AVERAGES THROUGH AT LEAST LATE NEXT WEEK. WITH THIS, DO EXPECTED A  
CONTINUED MARINE INFLUENCE ACROSS THE REGION WITH LATE NIGHT AND  
MORNING LOW CLOUDS SPREADING WELL INLAND BEFORE GIVING WAY TO MOSTLY  
SUNNY SKIES DURING THE AFTERNOON HOURS.  
 

 
   
AVIATION...AS OF 11:00 AM PDT SATURDAY
 
MVFR CIGS ACROSS THE  
BOARD WITH HIGHER BASED MARINE STRATUS DECK IN PLACE. MARINE  
STRATUS WILL RETREAT FROM INLAND VALLEYS THROUGH THE NEXT 2 HOURS.  
GENERALLY LIGHT SOUTHERLY/SOUTHWEST WINDS THIS MORNING SHIFTING TO  
ONSHORE WINDS ALONG THE COAST BY THE AFTERNOON. THE MARINE LAYER  
WILL COMPRESS AND RESULT IN LOWER CEILINGS FOR TONIGHT AS A RESULT  
OF SHORT WAVE RIDGING DEVELOPING INTO SUNDAY.  
 
VICINITY OF KSFO...MVFR CIGS THROUGH 1845Z.  
 
SFO BRIDGE APPROACH...SIMILAR TO KSFO.  
 
MONTEREY BAY TERMINALS...MVFR THROUGH 19-20Z. SOUTHERLY WINDS MAY  
WRAP STRATUS AROUND THE NORTHERN LIP OF THE MONTEREY BAY INTO THE  
EARLY AFTERNOON.  
 

 
   
MARINE...AS OF 01:52 PM PDT SATURDAY
 
LIGHT WIND AND SEAS WILL  
CONTINUE THROUGH THE REMAINDER OF THE WEEKEND. NORTHWEST WINDS  
INCREASE EARLY INTO NEXT WEEK. A MIXED SHORT PERIOD NORTHWEST  
SWELL AND A SMALLER LONG PERIOD SOUTHERLY SWELL WILL CONTINUE TO  
MOVE THROUGH THE COASTAL WATERS.  
 

 
   
MTR WATCHES/WARNINGS/ADVISORIES
 
 
.TNGT...NONE.  
 

 
 
PUBLIC FORECAST: RGASS  
AVIATION: DRP  
MARINE: DRP  
 
VISIT US AT WWW.WEATHER.GOV/SANFRANCISCO  
 
FOLLOW US ON FACEBOOK AND TWITTER AT:  
WWW.FACEBOOK.COM/NWSBAYAREA  
WWW.TWITTER.COM/NWSBAYAREA  
 
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