East Bay Interior Valleys Severe Watches & Warnings NOAA Weather Radio

Watches & Warnings

Heat Advisory
Issued: 8:50 PM PDT Jun. 21, 2018 – National Weather Service

... Heat advisory remains in effect from 11 am to 8 PM PDT

* timing... 11 am to 8 PM Saturday

* 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... 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 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 on Saturday with highs expected in the mid to upper
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 mountains.

Precautionary/preparedness actions...

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.