Wind Advisory 5, NWS San Francisco Bay Area, CA

000 
WWUS76 KMTR 040327
NPWMTR

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
827 PM PDT FRI APR 3 2009


CAZ006-505-508-509-040430-
/O.CAN.KMTR.WI.Y.0005.000000T0000Z-090404T0500Z/
SAN FRANCISCO-
COASTAL NORTH BAY...INCLUDING POINT REYES NATIONAL SEASHORE-
SAN FRANCISCO BAY SHORELINE-SAN FRANCISCO PENINSULA COAST-
827 PM PDT FRI APR 3 2009

...WIND ADVISORY FOR COASTAL SECTIONS OF THE SAN FRANCISCO BAY
AREA IS CANCELLED...

THE NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA HAS
CANCELLED THE WIND ADVISORY. BY 8 PM PDT WIND SPEEDS NEAR THE
COAST HAD FALLEN BELOW 35 MPH. WINDS WERE EXPECTED TO CONTINUE
TO DECREASE OVERNIGHT.

$$

DYKEMA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA CA
300 PM PDT FRI APR 3 2009

UPDATED FOR AVIATION DISCUSSION

.DISCUSSION...AS OF 2:35 PM PDT FRIDAY...SKIES ARE MOSTLY SUNNY
ACROSS THE DISTRICT WITH TEMPS IN THE MID 50S TO UPPER 60S. THERE ARE
A FEW 70S IN INTERIOR MONTEREY AND SAN BENITO COUNTIES. WINDS ARE
STILL GUSTY...ESPECIALLY ALONG THE COAST/BAYS AND IN THE HILLS. THE
GRADIENT PICTURE STILL INDC A STRONG NORTHERLY GRADIENT OF 6.4 MB
BETWEEN ARCATA-SFO AND A STRONG ONSHORE GRADIENT OF 3.0 MB BETWEEN
SFO-SAC.

SATL IMAGERY IS SHOWING THE TROF THAT WAS OVER THE DISTRICT NOW INTO
SOUTHERN NEVADA. A RIDGE IS BUILDING IN THE EASTERN PACIFIC IN
RESPONSE TO A DEEPENING TROF ALONG 150W. THE RIDGE IS MOVING ONTO THE
COAST AT THIS TIME.

DRY WEATHER ALONG WITH GRADUALLY WARMING TEMPS ARE EXPECTED OVER THE
WEEKEND AS THE RIDGE MOVES OVERHEAD. THE NAM12 KEEPS THE SIGNIFICANT
BL MOISTURE OFFSHORE...SO WOULD EXPECT LITTLE IF ANY LOW CLOUDS.
WINDS WILL ALSO DECREASE AS THE PRESSURE GRADIENT RELAXES.

MODELS ARE SHEARING THE TROF AS IT MOVES EAST...DEVELOPING A CUTOFF
LOW OFF THE CA COAST ON MONDAY. MODELS CONTINUE TO SLOW THE EASTWARD
PROGRESSION OF THE UPPER LOW...SO HAVE BACKED OFF ON THE TIMING OF
THE RAIN SHOWERS. MODELS ARE ALSO HINTING OF A MORE SOUTHERN TRACK OF
THE LOW...ESPECIALLY THE 12Z GFS. BASED ON THE SLOWER PROGRESSION...
AS WELL AS THE POTENTIAL FOR A MORE SOUTHERN TRACK HAVE DECIDED TO
GO WITH CHANCE POPS...MAINLY FOR MON NIGHT AND TUESDAY. IF THE ECMWF
VERIFIES SHOWERS COULD CONTINUE INTO WEDNESDAY. MEDIUM RANGE MODELS
ALSO DISAGREE ON THE NEXT TROF LATER IN THE UPCOMING WEEK...WITH THE
ECMWF SPLITTING THE TROF AND THE GFS KEEPING IT INTACT. THEREFORE...
HAVE MADE KEPT THE EXTENDED PARTLY CLOUDY WITH BELOW NORMAL TEMPS...
ALONG WITH A SLIGHT CHANCE OF SHOWERS AT TIMES.

&&

.AVIATION...AS OF 3:00 PM PDT FRIDAY...WITH HIGH PRESSURE AT THE
SURFACE OVER THE EAST PACIFIC AND STRONG NORTHWEST WIND ALOFT...
STRONG SURFACE ONSHORE PRESSURE GRADIENTS IN EXCESS OF 3MB ARE
PROVIDING WINDY CONDITIONS AGAIN FOR S.F.BAY AREA AND CENTRAL COAST
TERMINALS. WITH THE HIGH PRESSURE SKIES AND CLEAR AND THE STRONG N-S
PRESSURE COMPONENT IN EXCESS OF 5MB WILL CONTINUE UNRESTRICTED CIGS
AND VSBYS OVERNIGHT. PRESSURE GRADIENTS WILL WEAKEN BY LATE EVENING
AND WINDS WILL DIMINISH OVERNIGHT AND BECOME LIGHT TOWARD DAWN.

.VICINITY OF KSFO...SKIES TO REMAIN UNRESTRICTED WITH WINDS FROM THE
WNW AT 25-30KTS WITH HIGHER GUSTS TO 39KTS. WINDS TO DROP TO 15KTS BY
06Z AND LIGHT NW WIND AOB 10KTS BY 12Z.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .TNGT...GLW...PT ARENA TO PT.PIEDRAS BLANCAS 10-60 NM
          ...GLW...POINT ARENA TO PIGEON POINT 0-10 NM
                    UNTIL 11 PM
          ...GLW...POINT PINOS TO PT PIEDRAS BLANCAS 0-10 NM
          ...SCA...PIGEON POINT TO POINT PINOS 0-10 NM
          ...SCA...SF BAY UNTIL 10 PM
          ...SCA...MONTEREY BAY UNTIL 10 PM
          ...SCA...SAN FRANCISCO BAR

PUBLIC FORECAST: MHS
AVIATION/MARINE: GUDGEL

NWS ON THE WEB AT WEATHER.GOV/SANFRANCISCO

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
925 PM PDT THU APR 2 2009

CAZ006-505-508-509-031300-
SAN FRANCISCO-
COASTAL NORTH BAY...INCLUDING POINT REYES NATIONAL SEASHORE-
SAN FRANCISCO BAY SHORELINE-SAN FRANCISCO PENINSULA COAST-
925 PM PDT THU APR 2 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE COASTAL SECTIONS OF THE
SAN FRANCISCO BAY AREA.

.DAY ONE...THURSDAY NIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

STRONG NORTHWEST WINDS ARE EXPECTED ONCE AGAIN ON FRIDAY AFTERNOON
AND FRIDAY EVENING. WIND GUSTS AS HIGH AS 40 MPH ARE POSSIBLE NEAR
THE OCEAN AND BAYS.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS PER STANDARD OPERATING PROCEDURES.

DYKEMA