WEATHER »
  • Red Flag Warning for San Francisco County, California
  • Red Flag Warning issued October 12 at 5:45AM PDT until October 12 at 5:00PM PDT by NWS
  • Effective: Thursday, October 12, 2017 at 5:45 a.m.
  • Expires: Thursday, October 12, 2017 at 5 p.m.
  • ...RED FLAG WARNING THROUGH THURSDAY AFTERNOON FOR ELEVATIONS
    ABOVE 1000 FEET IN THE SAN FRANCISCO BAY AREA AS WELL AS
    ELEVATIONS ABOVE 1000 FEET ACROSS MONTEREY COUNTY AND SAN BENITO
    COUNTY...
    ...FIRE WEATHER WATCH IN EFFECT FROM FRIDAY AFTERNOON THROUGH
    SATURDAY EVENING FOR GUSTY OFFSHORE WIND AND LOW HUMIDITY FOR
    NORTH BAY MOUNTAINS AND DIABLO RANGE...
    .Low humidity and gusty northerly winds will combine with dry
    fuels to produce critical fire weather conditions, especially
    across higher elevations of the North Bay Mountains, East Bay
    Hills, Santa Cruz Mountains, the Santa Lucia Mountains, and the
    mountains of San Benito County and Interior Monterey County.
    Another round of very dry conditions and gusty offshore winds
    will arrive late Friday though early Saturday for the North Bay
    Mountains and Diablo Range.
    ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT THIS
    AFTERNOON FOR WIND AND LOW HUMIDITY FOR FIRE WEATHER ZONES 512,
    517, AND 518...
    * AFFECTED AREA...Fire weather zones 512, 517, and 518.
    * WIND...North to northeast winds of 15 to 25 mph with isolated gusts
    to 45 mph, especially at elevations above 1500 ft.
    * HUMIDITY...Minimum daytime values between 10-20 percent with
    night time recovery values between 25-35 percent, especially
    in elevations above 1500 ft.
    * HIGHEST THREAT...The Santa Lucia Range above the Big Sur
    Coast as well as higher ridges and peaks elsewhere across
    Monterey and San Benito Counties.
    * IMPACTS...Any fires that develop will likely spread rapidly.
    Outdoor burning is not recommended.

  • Red Flag Warning for San Francisco County, California
  • Red Flag Warning issued August 06 at 9:06PM PDT until August 07 at 11:00AM PDT by NWS
  • Effective: Thursday, August 6, 2015 at 9:06 p.m.
  • Expires: Friday, August 7, 2015 at 11 a.m.
  • ...RED FLAG WARNING IN EFFECT THROUGH 11 AM FRIDAY FOR THE ENTIRE
    SAN FRANCISCO BAY AREA AND MONTEREY BAY AREA FOR DRY
    THUNDERSTORMS...
    .AN UPPER LEVEL LOW NEAR THE BIG SUR COAST HAS COMBINED WITH
    SUBTROPICAL MOISTURE TO PRODUCE SCATTERED THUNDERSTORMS ACROSS
    SANTA CRUZ AND WESTERN MONTEREY COUNTY ON THURSDAY EVENING. THESE
    STORMS ARE EXPECTED TO MOVE TO THE NORTH AND EAST OVERNIGHT AND
    POSSIBLY IMPACT MUCH OF THE SAN FRANCISCO BAY AREA. INDIVIDUAL
    THUNDERSTORMS ARE MOVING RAPIDLY TO THE NORTH-NORTHEAST AT ABOUT
    40 MPH WHICH MEANS PRECIPITATION ACCUMULATION IS PROBABLY LIGHT.
    THUS...THERE IS A HIGH LIKELIHOOD FOR DRY LIGHTNING AND THE
    POTENTIAL FOR FIRE STARTS. THUNDERSTORM ACTIVITY IS FORECAST TO
    MOSTLY END BY FRIDAY MORNING EXCEPT PERHAPS A FEW ISOLATED
    LINGERING THUNDERSTORMS OVER THE EASTERN PART OF THE DISTRICT
    THROUGH MID MORNING.
    ...RED FLAG WARNING FOR DRY THUNDERSTORMS REMAINS IN EFFECT UNTIL
    11 AM PDT FRIDAY FOR FIRE WEATHER ZONES 509... 511...512...513...
    516...517...518...528...529 AND 530...
    * AFFECTED AREA...FIRE WEATHER ZONES 509...511...512...513...
    516...517...518...528...529 AND 530.
    * TIMING...SCATTERED THUNDERSTORMS WILL CONTINUE THROUGH THURSDAY
    NIGHT...AND SHOULD END BY MID MORNING FRIDAY.
    * THUNDERSTORMS...THUNDERSTORMS ARE EXPECTED TO PRODUCE
    SIGNIFICANT LIGHTNING ACTIVITY WITH A HIGH LIKELIHOOD OF DRY
    LIGHTNING.
    * IMPACTS...ANY FIRES THAT DEVELOP WILL LIKELY SPREAD RAPIDLY.
    WINDS CAN CHANGE SUDDENLY IN THE VICINITY OF THUNDERSTORMS.

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