Weather Alerts for Big Bear Valley

Issued by the National Weather Service

Heat Advisory  HEAT ADVISORY   Heat Advisory
BIG BEAR VALLEY

Areas Affected:
East Bay Hills and the Diablo Range - East Bay Interior Valleys - Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park - North Bay Interior Valleys - North Bay Mountains - San Francisco Bay Shoreline - Santa Clara Valley Including San Jose - Santa Cruz Mountains - Santa Lucia Mountains and Los Padres National Forest - Southern Salinas Valley, Arroyo Seco and Lake San Antonio
Effective: Sat, 6/23 11:00am Updated: Fri, 6/22 1:22am Urgency: Expected
Expires: Sat, 6/23 8:00pm Severity: Minor Certainty: Likely

 
Details:
...HEAT ADVISORY REMAINS 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), 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.

Information:
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.

Fire Weather Watch  FIRE WEATHER WATCH   Fire Weather Watch
BIG BEAR VALLEY

Areas Affected:
East Bay Hills and the Diablo Range - North Bay Mountains
Effective: Sat, 6/23 11:00am Updated: Fri, 6/22 1:22am Urgency: Future
Expires: Sun, 6/24 8:00pm Severity:  Moderate  Certainty: Possible

 
Details:
...Gusty northerly winds coupled with hot temperatures and low
humidity values Saturday through Sunday evening...
.High pressure building along the coast will build inland through
the weekend and bring a combination of gusty northerly winds, hot
temperatures, and low humidity values late morning Saturday
through Sunday evening. Northerly winds will be 15 to 30 mph with
gusts up to 40 mph. Humidities will drop into the low to mid teens
or locally into the single digits with poor overnight recoveries.
Temperatures in the mid to upper 90s as well as isolated triple
digit readings are expected on Saturday which will exacerbate
existing severe fire weather conditions due to gusty north winds
and low humidities. The areas of greatest concern will be located
in higher terrain of northern and eastern Napa and Sonoma county
as well as throughout the Diablo Range. Any fire starts may spread
rapidly in these conditions. Avoid activities that may lead to
fire ignition, including lawn work, driving on grass, tossing
cigarettes, lighting campfire or fireworks, especially during
Saturday and Sunday afternoons.
...FIRE WEATHER WATCH REMAINS IN EFFECT FROM SATURDAY MORNING
THROUGH SUNDAY EVENING FOR GUSTY NORTH WINDS AND LOW RELATIVE
HUMIDITY FOR FIRE WEATHER ZONES 507 AND 511...
* AFFECTED AREA...North Bay Mountains, East Bay Hills and the
Diablo Range
* 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.
* 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.

Information:
A Fire Weather Watch means that critical fire weather conditions
are forecast to occur. Listen for later forecasts and possible
Red Flag Warnings.