Area Forecast Discussion
Issued by NWS San Francisco Bay Area, CA

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FXUS66 KMTR 112148
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
248 PM PDT FRI JUL 11 2014

.SYNOPSIS...A WARMING TREND IS EXPECTED ACROSS INLAND AREAS
BEGINNING THIS WEEKEND AND INTO EARLY NEXT WEEK AS HIGH PRESSURE
BUILDS OVER CENTRAL CALIFORNIA. NEAR-COASTAL SITES WILL CONTINUE
TO EXPERIENCE ONSHORE FLOW AND NEAR-NORMAL CONDITIONS.

&&

.DISCUSSION...AS OF 2:48 PM PDT FRIDAY...THE MARINE LAYER IS STILL
VERY DEEP WITH THE FORT ORD PROFILER INDICATING A DEPTH OF NEAR 3400
FEET. LOW CLOUDS HAVE CLEARED FROM MOST OF THE LANDMASS...ALTHOUGH
STRATUS PERSISTS ALONG THE BIG SUR COAST AS WELL AS OVER MOST OF
SAN FRANCISCO AND MARIN COUNTY AS WELL AS FAR WESTERN SONOMA
COUNTY. EXPECTING THE LOW CLOUDS TO RETURN THIS EVENING AND SPREAD
INLAND EARLY ONCE AGAIN.

THE UPPER LEVEL LOW JUST OFF THE NORTHERN CALIFORNIA COAST WILL
CONTINUE TO PULL NORTHWARD AWAY FROM THE REGION DURING THE WEEKEND.
THIS WILL ALLOW THE UPPER LEVEL RIDGE TO BUILD BACK WEST OVER
CENTRAL CALIFORNIA AND NEVADA...RESULTING IN A SLIGHT WARMING
TREND THROUGH THIS WEEKEND...ESPECIALLY ACROSS INLAND AREAS. WHILE
INLAND AREAS WILL WARM INTO THE 90S TO A FEW DEGREES ABOVE THE
CENTURY MARK...ONSHORE FLOW WILL INCREASE AND KEEP TEMPERATURES
NEAR NORMAL AT THE IMMEDIATE COAST THROUGH EARLY NEXT WEEK.

MEDIUM RANGE FORECAST MODELS INDICATE THAT THE UPPER LEVEL RIDGE
WILL BEGIN TO WEAKEN BEGINNING THE MIDDLE PART OF NEXT WEEK AND
ALLOW INLAND TEMPERATURES TO COOL SLIGHTLY. DRY CONDITIONS WILL
PERSIST.

&&

.AVIATION...AS OF 10:25 AM PDT FRIDAY...SOUTH FLOW AND DEEP MARINE
LAYER HAS GIVEN SIMILAR RESULTS TO YESTERDAY. CIGS CONTINUE TO
GRADUALLY CLEAR. EXPECT VFR CONDITIONS THIS AFTERNOON. FLOW BEGINS
TO BECOME MORE ONSHORE FLOW TONIGHT SO EXPECT CIGS AT ALL
TERMINALS...INCLUDING KSFO. CONF IS MEDIUM-HIGH.

VICINITY OF KSFO...S-SW FLOW CONTINUED TO SAVE KSFO ONCE AGAIN.
VFR CONDITIONS THIS AFTERNOON WITH SW FLOW EARLY BECOMING MORE W
THIS AFTERNOON. BEST CHANCE FOR CIGS WILL BE TONIGHT AS FLOW
BECOMES MORE ONSHORE. BROUGHT CIGS BACK AFTER 06Z.

KSFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...CIGS SLOWLY ROLLING BACK TO COAST
WITH CIGS CLEARING 1830-19Z. VFR THIS AFTERNOON. CIGS RETURN EARLY
THIS EVENING.

&&

.MARINE...AS OF 02:43 PM PDT FRIDAY...SOUTHERLY FLOW WILL BECOME
MORE WESTERLY OVER THE WATERS THIS EVENING AND OVERNIGHT AS A LOW
PRESSURE SYSTEM MOVES INLAND. NORTHWEST FLOW INCREASES OVER THE
WEEKEND AS HIGH PRESSURE BUILDS OVER THE EASTERN PACIFIC.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...SCA...SF BAY NORTH OF THE BAY BRIDGE UNTIL 9 PM

&&

$$

PUBLIC FORECAST: SIMS
AVIATION/MARINE: MM

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