« View county listFire Weather Warning
North Bay Mountains-East Bay Hills and the Diablo Range-
1249 PM PDT Sat Jun 23 2018
...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT SUNDAY FOR
GUSTY NORTH WINDS AND LOW RELATIVE HUMIDITY FOR THE NORTH BAY
MOUNTAINS AND EAST BAY HILLS...
* WIND...Northerly winds of 15 to 30 mph with gusts to 40 mph.
Isolated highest terrain could see locally higher winds.
* HUMIDITY...Minimum humidity readings of 10 to 20% will be
common during the day, with the driest locations dropping
into the single digit range during the warmest, driest,
windiest times of the day. Overnight humidity recoveries will
be poor and less than 30%.
* HIGHEST THREAT...Elevations above 1000 feet, especially in
the extreme northern and eastern portions of the North Bay
Mountains and East Bay Hills
* IMPACTS...Any fires that develop will likely spread rapidly.
Outdoor burning or other activities that may lead to fire
creation is not recommended.
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 can
contribute to extreme fire behavior.
North Bay Interior Valleys-North Bay Mountains-
San Francisco Bay Shoreline-East Bay Interior Valleys-
East Bay Hills and the Diablo Range-Santa Cruz Mountains-
Santa Clara Valley Including San Jose-
Southern Salinas Valley/Arroyo Seco and Lake San Antonio-
Santa Lucia Mountains and Los Padres National Forest-
Mountains Of San Benito County And Interior Monterey County
Including Pinnacles National Park-
Including the cities of Santa Rosa, South Santa Rosa, Napa,
San Rafael, Petaluma, Novato, Rohnert Park, Angwin,
Lagunitas-Forest Knolls, Woodacre, Oakland, Fremont, Hayward,
Daly City, Berkeley, Concord, Antioch, Livermore, Walnut Creek,
Pleasanton, Pittsburg, San Ramon, Blackhawk, Scotts Valley,
Boulder Creek, Day Valley, San Jose, Greenfield, and King City
1251 PM PDT Sat Jun 23 2018
...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING...
* TIMING...UNTIL 8 PM THIS EVENING.
* LOCATIONS...Most of the inland Greater San Francisco Bay Area
(excluding coastal areas), inland Monterey county, and inland
San Benito county. For the San Francisco Bay Shoreline...main
heat risk is primarily from Redwood City to Cupertino.
* TEMPERATURES...Widespread temperatures in the mid 90s to low
100s in the impacted areas are expected. The hottest inland
locations such as Pinnacles National Park and the extreme inland
portions of Napa, Sonoma, and possibly Contra Costa counties may
surpass 105 degrees. The cities of San Francisco and Oakland are
excluded from this heat advisory, but will be very warm this
afternoon with highs expected in the low to mid 80s. San Jose,
which is included in the advisory, is forecast reach the mid to
upper 90s. For the San Francisco Bay Shoreline, the main heat
risks are generally from Redwood City to Cupertino where triple
digit temperatures are forecast, while other areas of the
shoreline will be noticeably cooler.
* IMPACTS...Moderate to high risk of heat related illness,
especially for vulnerable populations during the day Saturday.
Increased number of visitors to coastal communities and
beaches to escape heat, potentially resulting in increased
water rescues. Exacerbation of critical fire weather
conditions, especially in the North and East Bay hills and
A Heat Advisory means that a period of hot temperatures is
expected. Hot temperatures will create a situation in which heat
illnesses are possible. Drink plenty of fluids...stay in an air-
conditioned room...stay out of the sun...and check up on
relatives and neighbors.