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000
FXUS66 KMTR 162359
AFDMTR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
459 PM PDT SUN JUN 16 2013

.DISCUSSION...AS OF 1:45 PM PDT SUNDAY...MOSTLY SUNNY SKIES AND
MILD TEMPERATURES WERE PRESENT ACROSS THE REGION AS A BROAD UPPER
TROUGH CONTINUED TO IMPACT MUCH OF CALIFORNIA. MODERATE ONSHORE
WINDS AND A MARINE LAYER AROUND 1000 FEET KEPT TEMPERATURES COOL
ALONG THE COAST AND MILD INLAND. TEMPERATURES THIS AFTERNOON ROSE
INTO THE UPPER 50S TO MID 60S ALONG THE COAST...TO THE MID 70S TO
MID 80S INLAND. ONE OF THE WARMEST SPOTS SO FAR WAS PINNACLES
NATIONAL MONUMENT...AT 89 DEGREES. TEMPERATURES ARE FORECAST TO
RISE ANOTHER 5 DEGREES IN THE NEXT FEW HOURS.

A COOLING TREND IS FORECAST MONDAY INTO TUESDAY...AS THE UPPER LOW
MOVES EAST ONTO THE PACIFIC NORTHWEST COASTLINE...ALLOWING A
COOLER AIRMASS TO MOVE SOUTH INTO THE REGION. BY TUESDAY...DAYTIME
HIGH TEMPERATURES WILL STRUGGLE TO REACH THE MID 70S. A DEEP
MARINE LAYER NEARING 2000 FEET WITH MODERATE ONSHORE WINDS WILL
MAKE MANY LOCATIONS FEEL EVEN COOLER THAN FORECAST.

THE MIDDLE OF THE WEEK WILL BRING ANOTHER SHIFT IN THE WEATHER
PATTERN...AS THE UPPER LOW MOVES NORTHEAST FROM WA/OR ALLOWING FOR
AN UPPER LEVEL RIDGE TO MOVE SLOWLY EAST OVER CA. THIS WILL RESULT
IN A WARMING TREND...ESPECIALLY FOR THE INLAND
LOCATIONS...BEGINNING THURSDAY AND CONTINUING INTO THE WEEKEND.
THE MEDIUM RANGE MODELS CONTINUE TO BE IN GOOD AGREEMENT THAT
SATURDAY WILL BE THE WARMEST DAY OF THE WEEK...WITH INLAND
TEMPERATURES CREEPING INTO THE MID 80S TO LOW 90S. A FEW LOCATIONS
IN NORTHERN NAPA/SONOMA COUNTIES AS WELL AS FAR SOUTHERN MONTEREY
AND SAN BENITO COUNTIES MAY EVEN TOP OUT IN THE MID 90S. THESE
TEMPERATURES ARE ACTUALLY NEAR NORMAL FOR THE END OF JUNE...BUT
WILL FEEL MUCH WARMER COMPARED TO THE COOL WEATHER PATTERN AS OF
LATE.

A BIG UPDATE COMPARED TO YESTERDAY FROM THE CLIMATE PREDICTION
CENTERS 8 TO 14 DAY OUTLOOK (VALID FROM JUNE 24TH THROUGH JUNE
30TH) WHERE MUCH OF THE REGION WILL EXPERIENCE ABOVE NORMAL
TEMPERATURES.

&&

.AVIATION...AS OF 4:45 PM PDT SUNDAY...MARINE LAYER HAS BECOME
SHALLOWER AND IS NOW AROUND 1200 FEET. FLOW IS ONSHORE BUT STRATUS
IS NOT BANKED UP ALONG THE COAST WHICH SUGGESTS THE STRATUS WILL
BE LATE SPREADING INTO THE SFO BAY AREA.

VICINITY OF KSFO...VFR THROUGH THE AIRPORT EVENING RUSH HOUR.
WEST WINDS TO 25 KT GUSTING AS HIGH AS 30 KT THROUGH 04Z. CLOUDS
WILL START TO MOVE IN AFTER 06Z WITH MVFR CIGS BY 10Z.

KSFO BRIDGE APPROACH...SIMILAR TO SFO.

MONTEREY BAY AREA TERMINALS...STRATUS HAS CLEARED OUT THIS
AFTERNOON BUT LATEST SATELLITE IMAGE SHOWS CLOUDS STARTING TO FORM
AROUND PT PINOS AND THIS WILL EXPAND OVER MRY BAY. IFR CIGS OVER
MRY AND SNS BY 04Z.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...SCA...PT PINOS TO PT PIEDRAS BLANCAS 0-10 NM
             SCA...PIGEON PT TO PT PIEDRAS BLANCAS 10-60 NM
             SCA...SF BAY UNTIL 9 PM

&&

$$

PUBLIC FORECAST: RILEY
AVIATION/MARINE: W PI

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