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3 products issued by NWS for: 4 Miles WSW Pleasant Hill CA
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Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service San Francisco CA
1203 PM PDT Thu Jun 21 2018

CAZ006-506>513-516>518-528>530-220700-
San Francisco-North Bay Interior Valleys-North Bay Mountains-
San Francisco Bay Shoreline-San Francisco Peninsula Coast-
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-
Northern Salinas Valley/Hollister Valley and Carmel Valley-
Northern Monterey Bay-Southern Monterey Bay and Big Sur Coast-
1203 PM PDT Thu Jun 21 2018

This hazardous weather outlook is for the San Francisco Bay Area.

.DAY ONE...This Afternoon and Tonight

Quiet weather today with overnight low clouds primarily along the
coast and just inland.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Building high pressure over the West Coast will allow for warming
temperatures on Friday and Saturday. Temperatures will likely
reach the 90s to 100s across interior areas as well as parts of
the South Bay. This hot temperatures will lead to widespread
moderate and locally high potential heat risks. A heat advisory is
in effect for Saturday when the highest temperatures are
expected. Cooler temperatures are expected along the immediate
Pacific coast.

In addition to the hot conditions, northerly winds are expected to
develop across the North Bay Mountains late Friday, resulting in
elevated Fire Weather concerns. A fire weather watch is in effect
from midday Saturday through Sunday evening.


.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated at this time.


$$



Heat Advisory

URGENT - WEATHER MESSAGE
National Weather Service San Francisco Bay Area
1154 AM PDT Thu Jun 21 2018

CAZ506>508-510>513-516>518-220500-
/O.NEW.KMTR.HT.Y.0001.180623T1800Z-180624T0300Z/
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.

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.

&&

$$



Fire Weather Watch

URGENT - FIRE WEATHER MESSAGE
National Weather Service San Francisco CA
1018 AM PDT Thu Jun 21 2018

...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 mid to low 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.

CAZ507-511-220500-
/O.NEW.KMTR.FW.A.0001.180623T1800Z-180625T0300Z/
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
Sunday evening.

* 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.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$



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NOAA National Weather Service
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Silver Spring, MD 20910
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Page last modified: May 16, 2007
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