« View county listFire Weather Watch
North Bay Mountains-East Bay Hills and the Diablo Range-
1018 AM PDT Thu Jun 21 2018
...FIRE WEATHER WATCH IN EFFECT FROM SATURDAY MORNING THROUGH
SUNDAY EVENING FOR GUSTY NORTH WINDS AND LOW RELATIVE HUMIDITY
FOR FIRE WEATHER ZONES 507 AND 511...
The National Weather Service in San Francisco has issued a Fire
Weather Watch, which is in effect from Saturday morning through
* AFFECTED AREA...North Bay Mountains, East Bay Hills and the
* 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
* HIGHEST THREAT...Elevations above 1000ft, 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 Fire Weather Watch means that critical fire weather conditions
are forecast to occur. Listen for later forecasts and possible
Red Flag Warnings.
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
1154 AM PDT Thu Jun 21 2018
...HEAT ADVISORY IN EFFECT FROM 11 AM TO 8 PM PDT SATURDAY...
The National Weather Service in San Francisco has issued a Heat
Advisory, which is in effect from 11 AM to 8 PM PDT Saturday.
* TIMING... 11 AM TO 8 PM SATURDAY
* LOCATIONS... Most of the inland Greater San Francisco Bay Area
(excluding coastal areas and the San Francisco peninsula
itself), 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... Temperatures will generally be 15 to 20 degrees
above normal on Saturday. 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 Napa, Sonoma, and possibly Contra Costa counties may
surpass 105 degrees. The urban areas of San Francisco and
Oakland are excluded from this heat advisory, however, but are
still forecast to hover in the mid to upper 80s range on
Saturday while San Jose will hover in 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, leading to increased necessity of water
rescues. Exacerbation of severe fire weather conditions,
especially in the North and East Bay hills and mountains.
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.