Red Flag Warning 1, NWS San Francisco Bay Area, CA

000 
WWUS86 KMTR 212205
RFWMTR

RED FLAG WARNING
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
305 PM PDT THU SEP 21 2006

...STRONG OFFSHORE WINDS AND LOW HUMIDITIES WILL DEVELOP TONIGHT
AND CONTINUE THROUGH SATURDAY CREATING CRITICAL FIRE WEATHER
CONDITIONS...

.A STRONG HIGH PRESSURE SYSTEM WILL BUILD INTO SOUTHERN OREGON AND
NORTHERN NEVADA TONIGHT SETTING UP A STRONG SURFACE PRESSURE
GRADIENT. THIS WILL GENERATE STRONG NORTH AND NORTHEAST WINDS
ACROSS THE HILLS OF THE GREATER SAN FRANCISCO BAY AREA. WARM AND
DRY AIR MOVING INTO THE DISTRICT WILL CAUSE POOR NIGHTTIME RH
RECOVERIES TONIGHT AND FRIDAY NIGHT. 

DRY AIR AND STRONG WINDS IN AREAS OF VERY LOW FUEL MOISTURE WILL
COMBINE TO PRODUCE CRITICAL FIRE WEATHER CONDITIONS.

CAZ205-207-208-265-274-275-221315-
/O.CON.KMTR.FW.W.0001.060922T0700Z-060924T0000Z/
SONOMA AND MARIN COUNTIES-THE EAST BAY HILLS-SANTA CLARA COUNTY-
NAPA COUNTY-SANTA CRUZ MOUNTAINS-SAN MATEO HILLS-
305 PM PDT THU SEP 21 2006

...RED FLAG WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO
5 PM PDT SATURDAY...

A RED FLAG WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 5
PM PDT SATURDAY FOR THE NORTH AND EAST BAYS HILLS AND THE HILLS OF
SANTA CLARA COUNTY AND FOR THE SANTA CRUZ MOUNTAINS FOR STRONG
OFFSHORE WINDS AND LOW RELATIVE HUMIDITIES.

A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS
ARE EITHER OCCURRING NOW...OR ARE IMMINENT. A COMBINATION OF
STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL
CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. STRONG NORTHEAST WINDS
WILL DEVELOP LATE TONIGHT AND CONTINUE STRONG AND GUSTY INTO
SATURDAY. STRONG WINDS COMBINED WITH RAPID DRYING AT THE LOW
LEVELS WILL PRODUCE CRITICAL FIRE WEATHER CONDITIONS. WINDS OF
20 TO 30 MPH ARE LIKELY IN THE HILLS OF THE SAN FRANCISCO BAY
AREA WITH LOCALLY HIGHER GUSTS LIKELY IN THE NORTH AND EAST BAY
HILLS. PERSONS PLANNING ACTIVITIES IN THE WARNING AREA SHOULD BE
MINDFUL OF THE POTENTIAL CRITICAL FIRE WEATHER CONDITIONS
DEVELOPING OVER THE NEXT 24 HRS.

PLEASE ADVISE THE APPROPRIATE OFFICIALS OR FIRE CREWS IN THE
FIELD OF THIS RED FLAG WARNING.

$$

000 
WWUS86 KMTR 221256
RFWMTR

RED FLAG WARNING
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
556 AM PDT FRI SEP 22 2006

...STRONG OFFSHORE WINDS AND LOW HUMIDITIES WILL CONTINUE THROUGH
SATURDAY...PRODUCING CRITICAL FIRE WEATHER CONDITIONS IN THE HILLS
AND MOUNTAINS OF THE SAN FRANCISCO BAY AREA...

.STRONG HIGH PRESSURE OVER THE GREAT BASIN WAS PRODUCING OFFSHORE
WINDS OF 20 TO 35 MPH WITH GUSTS TO NEARLY 50 MPH IN THE HILLS OF
THE NORTH AND EAST BAY EARLY FRIDAY MORNING. NORTH TO NORTHEAST
WINDS ARE FORECAST TO INCREASE FURTHER THROUGH MID-MORNING ON
FRIDAY AND ALSO SPREAD SOUTH AND WEST INTO THE SANTA CRUZ MOUNTAINS.
RELATIVE HUMIDITY VALUES IN THE HILLS DROPPED TO AS LOW AS 20
PERCENT EARLY FRIDAY MORNING. THE AIRMASS IS FORECAST TO DRY EVEN
MORE FRIDAY AFTERNOON THROUGH SATURDAY. WINDS WILL EASE SOMEWHAT FRIDAY
AFTERNOON...BUT THEN PICK UP AGAIN FRIDAY NIGHT AND REMAIN STRONG
AND GUSTY INTO SATURDAY MORNING. WINDS WILL DECREASE
SIGNIFICANTLY SATURDAY AFTERNOON AND REMAIN RELATIVELY LIGHT
THROUGH EARLY NEXT WEEK.

DRY AIR AND STRONG WINDS IN AREAS OF VERY LOW FUEL MOISTURE WILL
COMBINE TO PRODUCE CRITICAL FIRE WEATHER CONDITIONS.

CAZ205-207-208-265-274-275-222200-
/O.CON.KMTR.FW.W.0001.000000T0000Z-060924T0000Z/
SONOMA AND MARIN COUNTIES-THE EAST BAY HILLS-SANTA CLARA COUNTY-
NAPA COUNTY-SANTA CRUZ MOUNTAINS-SAN MATEO HILLS-
556 AM PDT FRI SEP 22 2006

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT SATURDAY...

A RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT SATURDAY FOR
THE NORTH AND EAST BAY HILLS...THE HILLS OF SANTA CLARA COUNTY
AND FOR THE SANTA CRUZ MOUNTAINS FOR STRONG OFFSHORE WINDS AND LOW
RELATIVE HUMIDITIES.

A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS
ARE EITHER OCCURRING NOW...OR ARE IMMINENT. A COMBINATION OF
STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL
CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. STRONG NORTHEAST WINDS
WILL CONTINUE INTO SATURDAY...ESPECIALLY IN THE HILLS. WINDS OF
20 TO 30 MPH ARE LIKELY IN THE HILLS OF THE SAN FRANCISCO BAY AREA
WITH GUSTS AS HIGH AS 50 MPH. PERSONS PLANNING ACTIVITIES IN THE
WARNING AREA SHOULD BE MINDFUL OF THE CRITICAL FIRE WEATHER
CONDITIONS OVER THE NEXT 24 TO 36 HRS.

PLEASE ADVISE THE APPROPRIATE OFFICIALS OR FIRE CREWS IN THE
FIELD OF THIS RED FLAG WARNING.

$$

DYKEMA

000 
WWUS86 KMTR 222134
RFWMTR

RED FLAG WARNING
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
234 PM PDT FRI SEP 22 2006

...A RED FLAG WARNING REMAINS IN EFFECT THROUGH SATURDAY FOR STRONG
OFFSHORE WINDS AND LOW HUMIDITIES...PRODUCING CRITICAL FIRE
WEATHER CONDITIONS IN THE HILLS AND MOUNTAINS OF THE SAN FRANCISCO
BAY AREA...

...A FIRE WEATHER WATCH HAS BEEN ISSUED FOR POTENTIALLY STRONG
EAST WINDS AND LOW HUMIDITIES FOR THE MOUNTAINS OF SOUTHERN
MONTEREY COUNTY AND SAN BENITO COUNTY.

.CURRENT WIND SPEEDS HAVE DIMINISHED SINCE THIS MORNING AND ARE
RANGING BETWEEN 10 AND 20 MPH WITH GUSTS BETWEEN 30 AND 40 MPH. WINDS
WILL SHIFT TO THE NORTHEAST TONIGHT AND INCREASE AGAIN AS THE
SURFACE LOW MOVES TO THE SOUTH. RELATIVE HUMIDITY VALUES IN THE
HILLS ARE IN THE TEENS AT MOST OB SITES THIS AFTERNOON AND
RECOVERIES ARE EXPECTED TO BE POOR AT HIGHER ELEVATION SITES
TONIGHT. WINDS WILL IN NORTHERN ZONES WILL DECREASE SIGNIFICANTLY
SATURDAY AFTERNOON AND REMAIN RELATIVELY LIGHT THROUGH EARLY NEXT
WEEK. WINDS IN THE SOUTHERN ZONE 210 WILL INCREASE OUT OF THE EAST
SATURDAY MORNING AND CONTINUE THROUGH SUNDAY.

DRY AIR AND STRONG WINDS IN AREAS OF VERY LOW FUEL MOISTURE WILL
COMBINE TO PRODUCE CRITICAL FIRE WEATHER CONDITIONS.

CAZ205-207-208-265-274-275-231245-
/O.CON.KMTR.FW.W.0001.000000T0000Z-060924T0000Z/
SONOMA AND MARIN COUNTIES-THE EAST BAY HILLS-SANTA CLARA COUNTY-
NAPA COUNTY-SANTA CRUZ MOUNTAINS-SAN MATEO HILLS-
234 PM PDT FRI SEP 22 2006

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT SATURDAY...

A RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT SATURDAY. 

A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS
ARE EITHER OCCURRING NOW...OR ARE IMMINENT. A COMBINATION OF
STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL
CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. STRONG NORTHEAST WINDS
WILL CONTINUE INTO SATURDAY...ESPECIALLY IN THE HILLS. WINDS OF
20 TO 30 MPH ARE LIKELY IN THE HILLS OF THE SAN FRANCISCO BAY
AREA WITH GUSTS AS HIGH AS 50 MPH. PERSONS PLANNING ACTIVITIES IN
THE WARNING AREA SHOULD BE MINDFUL OF THE CRITICAL FIRE WEATHER
CONDITIONS OVER THE NEXT 24 TO 36 HRS.

PLEASE ADVISE THE APPROPRIATE OFFICIALS OR FIRE CREWS IN THE
FIELD OF THIS RED FLAG WARNING.

$$

CAZ210-231245-
/O.NEW.KMTR.FW.A.0003.060923T1300Z-060925T0100Z/
THE SALINAS VALLEY AND PINNACLES NM-
234 PM PDT FRI SEP 22 2006

...FIRE WEATHER WATCH IN EFFECT FROM SATURDAY MORNING THROUGH
SUNDAY AFTERNOON...

THE NATIONAL WEATHER SERVICE IN SAN FRANCISCO HAS ISSUED A FIRE
WEATHER WATCH...WHICH IS IN EFFECT FROM SATURDAY MORNING THROUGH
SUNDAY AFTERNOON. 

WINDS ARE EXPECTED TO INCREASE FROM THE EAST TO CRITICAL LEVELS
SATURDAY...ALONG WITH RELATIVE HUMIDITIES IN THE LOW TEENS DURING
THE DAY...WILL POTENTIALLY CREATE CRITICAL FIRE WEATHER CONDITIONS
FROM SATURDAY THROUGH SUNDAY AFTERNOON.

A FIRE WEATHER WATCH MEANS THAT CRITICAL FIRE WEATHER CONDITIONS
ARE FORECAST TO OCCUR. LISTEN FOR LATER FORECASTS AND POSSIBLE
RED FLAG WARNINGS.

$$

MORRISON

000 
WWUS86 KMTR 230923
RFWMTR

RED FLAG WARNING
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
223 AM PDT SAT SEP 23 2006

...A RED FLAG WARNING REMAINS IN EFFECT THROUGH THIS AFTERNOON FOR STRONG
OFFSHORE WINDS AND LOW HUMIDITIES...PRODUCING CRITICAL FIRE WEATHER
CONDITIONS IN THE HILLS AND MOUNTAINS OF THE SAN FRANCISCO BAY
AREA...

...A FIRE WEATHER WATCH REMAINS IN EFFECT FOR TONIGHT AND SUNDAY
FOR POTENTIALLY STRONG NORTHEAST WINDS AND LOW HUMIDITIES FOR THE
MOUNTAINS OF SOUTHERN MONTEREY COUNTY AND SAN BENITO COUNTY...

...THE FIRE WEATHER WATCH THAT HAD BEEN IN EFFECT FOR TODAY FOR
THE MOUNTAINS OF SOUTHERN MONTEREY COUNTY AND SAN BENITO COUNTY
HAS BEEN CANCELED...

.NORTHEAST WINDS WITH SPEEDS BETWEEN 10 AND 20 MPH AND LOCAL GUSTS
TO 30 MPH ARE NOW OCCURRING IN THE HILLS OF THE SAN FRANCISCO BAY
AREA. THESE WINDS ARE EXPECTED TO INCREASE SLIGHTLY OVER THE NEXT
SEVERAL HOURS AND THEN DECREASE DURING THE DAY ON SATURDAY.
RELATIVE HUMIDITY VALUES IN THE HILLS ARE CURRENTLY ONLY IN THE
UPPER TEENS AND LOWER 20S AND ARE EXPECTED TO DROP TO THE LOWER
TEENS BY AFTERNOON. WINDS IN NORTHERN ZONES WILL DECREASE
SIGNIFICANTLY DURING THE AFTERNOON AND THEN REMAIN RELATIVELY
LIGHT THROUGH EARLY NEXT WEEK. WINDS IN THE SOUTHERN ZONE 210 ARE
EXPECTED TO INCREASE OUT OF THE NORTHEAST SATURDAY NIGHT AND
CONTINUE INTO SUNDAY.

DRY AIR AND STRONG WINDS IN AREAS OF VERY LOW FUEL MOISTURE WILL
COMBINE TO PRODUCE CRITICAL FIRE WEATHER CONDITIONS.

CAZ205-207-208-265-274-275-231730-
/O.CON.KMTR.FW.W.0001.000000T0000Z-060924T0000Z/
SONOMA AND MARIN COUNTIES-THE EAST BAY HILLS-SANTA CLARA COUNTY-
NAPA COUNTY-SANTA CRUZ MOUNTAINS-SAN MATEO HILLS-
223 AM PDT SAT SEP 23 2006

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT THIS
AFTERNOON...

A RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT THIS
AFTERNOON. 

A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS
ARE EITHER OCCURRING NOW...OR ARE IMMINENT. A COMBINATION OF
STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL
CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. MODERATELY STRONG
NORTHEAST WINDS WILL CONTINUE ON SATURDAY...ESPECIALLY IN THE
HILLS. WINDS OF 10 TO 20 MPH ARE LIKELY IN THE HILLS OF THE SAN
FRANCISCO BAY AREA WITH LOCAL GUSTS AS HIGH AS 35 MPH. PERSONS
PLANNING ACTIVITIES IN THE WARNING AREA SHOULD BE MINDFUL OF THE
CRITICAL FIRE WEATHER CONDITIONS OVER THE NEXT 24 HRS.

PLEASE ADVISE THE APPROPRIATE OFFICIALS OR FIRE CREWS IN THE
FIELD OF THIS RED FLAG WARNING.

$$

CAZ210-231730-
/O.EXT.KMTR.FW.A.0003.060924T0100Z-060925T0100Z/
THE SALINAS VALLEY AND PINNACLES NM-
223 AM PDT SAT SEP 23 2006

...FIRE WEATHER WATCH NOW IN EFFECT FROM THIS EVENING THROUGH
SUNDAY AFTERNOON...

A FIRE WEATHER WATCH IS NOW IN EFFECT FROM THIS EVENING THROUGH
SUNDAY AFTERNOON.

WINDS ARE NOW EXPECTED TO REMAIN LIGHT TODAY AND THEN INCREASE
FROM THE NORTHEAST TO NEAR CRITICAL LEVELS TONIGHT AND SUNDAY...
ALONG WITH CONTINUING LOW RELATIVE HUMIDITIES. THIS WILL
POTENTIALLY CREATE CRITICAL FIRE WEATHER CONDITIONS FROM SATURDAY
EVENING THROUGH SUNDAY AFTERNOON.

A FIRE WEATHER WATCH MEANS THAT CRITICAL FIRE WEATHER CONDITIONS
ARE FORECAST TO OCCUR. LISTEN FOR LATER FORECASTS AND POSSIBLE
RED FLAG WARNINGS.

$$

BLIER

000 
WWUS86 KMTR 232202
RFWMTR

RED FLAG WARNING
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
302 PM PDT SAT SEP 23 2006

...RED FLAG WARNING FOR THE HILLS AND MOUNTAINS OF THE SAN
FRANCISCO BAY AREA HAS BEEN CANCELLED...

...RED FLAG WARNING HAS BEEN ISSUED FOR THE INTERIOR OF MONTEREY
COUNTY AND SAN BENITO COUNTY...INCLUDING PINNACLES NATIONAL
MONUMENT...THROUGH SUNDAY AFTERNOON FOR MODERATE SOUTHEAST WINDS
AND LOW RELATIVE HUMIDITIES...

.NORTHEAST WINDS AT THE HIGHER ELEVATIONS OF THE SAN FRANCISCO BAY
AREA SUBSIDED ON SATURDAY. BY MID AFTERNOON...WINDS IN THE HILLS
WERE GENERALLY LESS THAN 15 MPH. WINDS ARE EXPECTED TO DECREASE
FURTHER THROUGH THE EVENING HOURS. THEREFORE THE RED FLAG WARNING
HAS BEEN CANCELLED.

SOUTHEAST WINDS INCREASED ACROSS INTERIOR MONTEREY COUNTY AND SAN
BENITO COUNTY EARLY SATURDAY AFTERNOON...WHILE RELATIVE HUMIDITY
VALUES DROPPED AS LOW AS 10 PERCENT. WINDS MAY SUBSIDE BRIEFLY
LATE THIS AFTERNOON AND EVENING...BUT ARE THEN EXPECTED TO
INCREASE OVERNIGHT. VERY POOR RELATIVE HUMIDITY RECOVERIES ARE
EXPECTED OVERNIGHT SATURDAY NIGHT. MODERATE SOUTHEAST WINDS AND
VERY LOW RELATIVE HUMIDITIES ARE EXPECTED TO PERSIST ACROSS
INTERIOR MONTEREY COUNTY AND SAN BENITO COUNTY THROUGH EARLY
SUNDAY AFTERNOON. DRY AIR AND STRONG WINDS IN AREAS OF VERY LOW
FUEL MOISTURE WILL COMBINE TO PRODUCE CRITICAL FIRE WEATHER
CONDITIONS.

CAZ205-207-208-265-274-275-232315-
/O.CAN.KMTR.FW.W.0001.000000T0000Z-060924T0000Z/
SONOMA AND MARIN COUNTIES-THE EAST BAY HILLS-SANTA CLARA COUNTY-
NAPA COUNTY-SANTA CRUZ MOUNTAINS-SAN MATEO HILLS-
302 PM PDT SAT SEP 23 2006

...RED FLAG WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN SAN FRANCISCO HAS CANCELLED THE
RED FLAG WARNING FOR THE HILLS AND MOUNTAINS OF THE SAN FRANCISCO
BAY AREA. BY MID AFTERNOON SATURDAY...OFFSHORE WINDS HAD DECREASED TO
GENERALLY LESS THAN 15 MPH. WINDS ARE EXPECTED TO CONTINUE
TRENDING DOWN THROUGH THE EVENING HOURS. THEREFORE THE RED FLAG
WARNING HAS BEEN CANCELLED.

WINDS WILL PROBABLY INCREASE SLIGHTLY OVERNIGHT SATURDAY NIGHT...BUT
ARE NOT EXPECTED TO BE NEARLY AS STRONG AS WHAT WAS OBSERVED THE
PAST TWO NIGHTS AND FIRE WEATHER CONDITIONS ARE NOT EXPECTED TO
REACH CRITICAL LEVELS.

$$

CAZ210-241045-
/O.UPG.KMTR.FW.A.0003.060924T0100Z-060925T0100Z/
/O.NEW.KMTR.FW.W.0002.060923T2202Z-060925T0100Z/
THE SALINAS VALLEY AND PINNACLES NM-
302 PM PDT SAT SEP 23 2006

...RED FLAG WARNING IN EFFECT UNTIL 6 PM PDT SUNDAY FOR THE HIGHER
ELEVATIONS OF INTERIOR MONTEREY COUNTY AND SAN BENITO COUNTY FOR 
LOW RELATIVE HUMIDITY AND MODERATE SOUTHEAST WINDS...

THE NATIONAL WEATHER SERVICE IN SAN FRANCISCO HAS ISSUED A RED
FLAG WARNING...WHICH IS IN EFFECT UNTIL 6 PM PDT SUNDAY...FOR SAN
BENITO COUNTY AND THE INTERIOR OF MONTEREY COUNTY. THE FIRE WEATHER
WATCH IS NO LONGER IN EFFECT FOR THESE AREAS.

SOUTHEAST WINDS INCREASED OVER THE WARNING AREA ON SATURDAY
AFTERNOON...WHILE RELATIVE HUMIDITY VALUES DECREASED. BETWEEN 1
AND 2 PM PDT WIND SPEEDS OF 15 MPH WITH GUSTS AS HIGH AS 35 MPH
WERE OBSERVED AT ELEVATIONS ABOVE 1500 FEET. AT THE SAME TIME
RELATIVE HUMIDITY VALUES HAD DROPPED AS LOW AS 10 PERCENT...AND
EVEN LOWER. WINDS MAY EASE SOME LATER THIS AFTERNOON AND
EVENING...BUT ARE THEN EXPECTED TO INCREASE ONCE AGAIN
OVERNIGHT...WITH BREEZY CONDITIONS FORECAST TO PERSIST INTO EARLY
SUNDAY AFTERNOON. SOUTHEAST WINDS 15 TO 25 MPH ARE EXPECTED LATE
TONIGHT AND SUNDAY MORNING...WITH GUSTS OF 40 MPH LIKELY OVER
EXPOSED RIDGES. VERY POOR RELATIVE HUMIDITY RECOVERIES ARE
EXPECTED OVERNIGHT.

A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS
ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF
STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL
CREATE EXPLOSIVE FIRE GROWTH POTENTIAL.

$$

DYKEMA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
337 AM PDT THU SEP 21 2006

.DISCUSSION...AN UPPER TROUGH BRUSHING ACROSS THE NORTHERN PORTION
OF THE STATE HAS BROUGHT SOME HIGH CLOUDS ACROSS THE NORTHERN
ZONES...BUT OTHER THAN THAT...SATELLITE IMAGERY SHOWS NO STRATUS
ACROSS THE DISTRICT. THE UPPER TROUGH THAT IS MOVING THROUGH WILL
SERVE TO RAMP UP THE NORTHERLY SURFACE PRESSURE GRADIENTS ACROSS
THE STATE BY TONIGHT. RIGHT NOW GRADIENTS ARE STILL ONSHORE WITH 1.8
MB BETWEEN SFO AND SAC...AND 1.5 MB FROM SFO AND WMC. THESE WILL
CHANGE...THOUGH...BY TONIGHT AS A SURFACE HIGH BUILDS OVER THE GREAT
BASIN AND LOW PRESSURE EDGES TOWARDS THE CENTRAL CALIFORNIA COAST.
BY FRIDAY MORNING...THE 00Z GFS FEATURES A 12 MB SURFACE PRESSURE
GRADIENT BETWEEN WINNEMUCCA AND SAN FRANCISCO...WHILE THE 06Z WRF
HAS A 10 MB OFFSHORE GRADIENT FOR THAT SAME TIME. ALREADY WINDS
ACROSS THE HIGHEST PEAKS OF THE EAST BAY HILLS ARE GUSTING TO NEAR
30 MPH...AND THESE ARE EXPECTED TO INCREASE BY AT LEAST 10 MPH BY
TOMORROW AT THIS TIME. THEREFORE...A HIGH WIND WATCH WILL BE ISSUED
WITH THE MORNING PUBLIC FORECAST PACKAGE FOR THE NORTH AND EAST BAY
HILLS FOR TONIGHT THROUGH NOON FRIDAY...AS WINDS ARE EXPECTED TO
DECREASE BY THEN. WINDS WILL RAMP BACK UP AGAIN FRIDAY NIGHT INTO
SATURDAY AS THE WRF AND THE GFS BOTH INDICATE STRONGER OFFSHORE
GRADIENTS BY SATURDAY MORNING...BUT THE CORRESPONDING WRF 925 MB WIND
SPEEDS ARE NOT AS STRONG.

OFFSHORE FLOW THROUGH SATURDAY WILL RESULT IN WARMER TEMPERATURES
NEAR THE COAST WITH LITTLE CHANGE IN THE HIGH TEMPS INLAND WITH
LITTLE CHANGE IN THE TEMPERATURE OF THE AIRMASS ALOFT EXPECTED.
WINDS IN THE HILLS WILL EASE BY LATE SATURDAY AND ARE NOT EXPECTED
TO BE A PROBLEM FOR THE REMAINDER OF THE FORECAST PERIOD. BUT LIGHT
OFFSHORE FLOW IS FORECAST TO CONTINUE THROUGH THE REST OF THE
FORECAST PERIOD AS A WEAK SURFACE RIDGE REMAINS OVER THE GREAT BASIN
AND A WEAK TROUGH STAYS OFFSHORE. A BENEFIT TO THE OFFSHORE FLOW
WILL BE CONTINUED CLEAR SKIES THROUGH THE PERIOD.

&&

.AVIATION...A DRY NORTHERLY FLOW CONTINUES WITH CLEAR SKIES. VFR
CONDITIONS WITH THE OFFSHORE FLOW THROUGH TONIGHT.

&&

.FIRE WEATHER...IN COORDINATION WITH NEIGHBORING WEATHER OFFICES...
THE FIRE WEATHER WATCH FOR THE NORTH AND EAST BAY HILLS...THE DIABLO
RANGE...SANTA CRUZ MOUNTAINS AND THE HILLS OF SAN MATEO COUNTY FROM
LATE TONIGHT THROUGH SATURDAY WILL BE CONVERTED TO A RED FLAG
WARNING WITHIN THE NEXT FEW HOURS. MODEL OUTPUT CONTINUES TO SUPPORT
RIDGETOP WINDS OF 15 TO 30 MPH DURING THE WATCH PERIOD WITH GUSTS TO
40 MPH OR POSSIBLY HIGHER. FORECAST WINDS AND RH VALUES WILL PRODUCE
CRITICAL FIRE WEATHER CONDITIONS.

WINDS SHOULD EASE BY LATE SATURDAY AND REMAIN RELATIVELY LIGHT
THEREAFTER. BUT...THE AIRMASS WILL REMAIN VERY DRY THROUGH THE
END OF THE FORECAST PERIOD AS LIGHT OFFSHORE FLOW IS EXPECTED TO
PERSIST.

&&

MTR WATCHES/WARNINGS/ADVISORIES...
    .TDA...SCA...PT ARENA TO PIEDRAS BLANCAS...AND SF BAY (AFTN).
    .LATE TNGT THRU NOON FRI...HIGH WIND WATCH NORTH AND EAST
                               BAY MOUNTAINS.
    .LATE TNGT THRU SAT...FIRE WEATHER WATCH...ALL HILLS AND
                          MOUNTAINS OF THE SF BAY AREA (WILL BE
                          CONVERTED TO RED FLAG WARNING BY 6 AM).

PUBLIC FORECAST: ANDERSON
AVIATION/MARINE: STROBIN
FIRE WEATHER:    ANDERSON

NWS ON THE WEB AT WEATHER.GOV/SANFRANCISCO

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
619 PM PDT WED SEP 20 2006

CAZ506-507-510>512-211300-
NORTH BAY INTERIOR VALLEYS-NORTH BAY MOUNTAINS-
EAST BAY INTERIOR VALLEYS-EAST BAY HILLS AND THE DIABLO RANGE-
SANTA CRUZ MOUNTAINS-
619 PM PDT WED SEP 20 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE NORTH AND EAST BAY HILLS
...THE DIABLO RANGE...THE SANTA CRUZ MOUNTAINS...AND THE SAN MATEO
HILLS.

.DAY ONE...WEDNESDAY NIGHT

NO HAZARDOUS WEATHER IS EXPECTED.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH WEDNESDAY

A FIRE WEATHER WATCH IS IN EFFECT FROM MIDNIGHT THURSDAY NIGHT
THROUGH 5 PM SATURDAY. (SEE SFORFWMTR FOR DETAILS).  STRONG
NORTHEAST WINDS AND LOW HUMIDITIES WILL COMBINE TO CAUSE EXTREME FIRE
WEATHER CONDITIONS BEGINNING LATE THURSDAY NIGHT AND CONTINUING
THROUGH THE DAY SATURDAY.  THE STRONGEST WINDS WILL DEVELOP IN THE
NORTH AND EAST BAY HILLS THURSDAY NIGHT AND FRIDAY MORNING WITH
POSSIBLE GUSTS TO 50 MPH.  WINDS WILL DIMINISH SOMEWHAT DURING THE
DAY FRIDAY BUT WILL LIKELY INCREASE AGAIN LATE FRIDAY NIGHT INTO
SATURDAY MORNING. PERSONS PLANNING OUTDOOR ACTIVITIES IN THE FIRE
WEATHER WATCH AREA SHOULD BE VERY MINDFUL OF THE EXTREME FIRE
CONDITIONS. IT IS LIKELY A RED FLAG WARNING WILL BE ISSUED FOR THE
WATCH AREA BY THURSDAY MORNING.

.SPOTTER INFORMATION STATEMENT...

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

DYKEMA