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

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000
FXUS66 KMTR 200549
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
1049 PM PDT TUE AUG 19 2014

.SYNOPSIS...WIDESPREAD NIGHT AND MORNING LOW CLOUDS AND FOG WITH
LOCAL COASTAL DRIZZLE...CLEARING TO NEAR THE COAST AND BAYS BY
AFTERNOON. OTHERWISE MOSTLY CLEAR AND DRY...ASIDE FROM SOME HIGH
CLOUDS AT TIMES. AFTERNOON TEMPERATURES WILL GENERALLY BE NEAR TO
SOMEWHAT BELOW SEASONAL NORMS.

&&

.DISCUSSION...AS OF 9:30 PM PDT TUESDAY...AN UPPER LEVEL LOW OFF
THE CENTRAL COAST CAUSED THE MARINE LAYER TO DEEPEN TO OVER 3000
FEET. SOME MEASURABLE DRIZZLE WAS REPORTED ALONG THE COAST WITH
HALF MOON BAY RECEIVING .05 INCHES AND MRY .04 INCHES. THE MARINE
AIR EXTENDED WELL INLAND AS EVEN THE WARMEST INLAND LOCATIONS HAD
HIGHS IN THE 80S.

COASTAL DRIZZLE IS EXPECTED ALONG THE COAST AGAIN TONIGHT BUT
WITH THE UPPER LOW MOVING INTO THE SOUTHERN CALIFORNIA COASTAL
WATERS...MEASURABLE DRIZZLE WILL BE LESS COMMON. THERE IS A VERY
SLIGHT CHANCE OF MOISTURE FROM THE SOUTHERN SIERRA WRAPPING
AROUND THE UPPER LOW INTO SOUTHERN MONTEREY AND SAN BENITO
COUNTIES OVERNIGHT.

BY WEDNESDAY THE UPPER LOW WILL BE KICKED EASTWARD BY A DEEPENING
UPPER TROUGH OVER THE PACIFIC NORTHWEST. THE MARINE LAYER WILL
MOST LIKELY MIX OUT ON WEDNESDAY ALLOWING INLAND AREAS TO WARM UP
SLIGHTLY. THE MARINE LAYER WILL REFORM WEDNESDAY NIGHT AT A LOWER
HEIGHT SO THERE WILL BE LESS INLAND PENETRATION OF THE STRATUS.
INLAND TEMPERATURES WILL SLOWLY WARM BACK TO NEAR NORMAL VALUES
THURSDAY INTO FRIDAY WHILE COASTAL AREAS MAY COOL SLIGHTLY AS THE
STRATUS DECK WILL BE A LITTLE THICKER.

NEAR NORMAL TEMPERATURES ARE EXPECTED THIS WEEKEND AS THE UPPER
TROUGH CONTINUES OVER THE GREAT BASIN. THE UPPER TROUGH FINALLY
MOVES FURTHER EAST EARLY NEXT WEEK TO ALLOW MORE WARMING OVER THE
AREA.

&&

.AVIATION...AS OF 10:45 PM PDT TUESDAY...ONSHORE WINDS WILL USHER
IN LOW CLOUDS AGAIN OVERNIGHT. MVFR CIGS ARE FORECAST WITH LOCAL
IFR POSSIBLE TONIGHT AND WED MORNING.

VICINITY OF KSFO...LOW CLOUDS ARE EXPECTED TO ARRIVE BY 10Z.

KSFO BRIDGE APPROACH...SIMILAR TO KSFO.

MONTEREY BAY AREA TERMINALS...MVFR CIGS TONIGHT. LOW CLOUDS ARE
EXPECTED TO MIX OUT BY LATE WED MORNING.

&&

.MARINE...AS OF 3:00 PM PDT TUESDAY...MODERATE NORTHWESTERLY WINDS
ACROSS THE NORTHERN OUTER WATERS TONIGHT INTO WEDNESDAY AND OVER
PORTIONS OF SAN FRANCISCO BAY DURING THE AFTERNOONS. OTHERWISE
GENERALLY LIGHT WINDS AND SEAS WILL CONTINUE. MODERATE PERIOD
SOUTH SWELL MOVES INTO THE WATERS LATER THIS WEEK DUE TO STORMS IN
THE TROPICAL PACIFIC.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...SCA...PT ARENA TO PT REYES 10-60 NM

&&

$$

PUBLIC FORECAST: W PI
AVIATION: CANEPA
MARINE: AC

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