Napa County, California
To view the watches and warnings information that we have available you will need to select your city, county, or state first.
Enter City, State or Zip Code to Select a Location from the List
Watch/Warnings
Click to view enlarged map

The National Weather Service's Watches, Warnings and Advisories by state counties include: Thunderstorm, Tornado, Flood, Flash Flood, Winter Storm, High Wind, Gale, Small Aircraft, High Surf, Marine, Heat, Air Quality, Ashfall, Hazardous, and Special Statements.
Weather Alerts: Napa County, California
« View county list

Fire Weather Warning
CAZ507-511-230500-
/O.UPG.KMTR.FW.A.0001.180623T1800Z-180625T0300Z/
/O.NEW.KMTR.FW.W.0001.180623T1800Z-180625T0300Z/
North Bay Mountains-East Bay Hills and the Diablo Range-
745 AM PDT Fri Jun 22 2018

...RED FLAG WARNING IN EFFECT FROM 11 AM SATURDAY TO 8 PM PDT
SUNDAY FOR GUSTY NORTH WINDS AND LOW RELATIVE
HUMIDITY FOR THE NORTH BAY MOUNTAINS AND EAST BAY HILLS...

The National Weather Service in San Francisco has issued a Red
Flag Warning, which is in effect from 11 AM Saturday to 8 PM PDT
Sunday. The Fire Weather Watch is no longer in effect.

* 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.

&&

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.


&&

$$
Heat Advisory
CAZ506>508-510>513-516>518-231400-
/O.CON.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
151 PM PDT Fri Jun 22 2018

...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...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.

&&

$$
National Weather Service

Providing "weather, water cycle, and climate forecasts and warnings for the United States, its territories, adjacent waters and ocean areas, for the protection of life and property and the enhancement of the national economy."
Weather Alerts by Type
Air Quality Alert
Aviation Weather Warning
Beach Hazard Statement
Coastal Flood Advisory
Coastal Flood Warning
Excessive Heat Warning
Fire Weather Warning
Fire Weather Watch
Flash Flood Warning
Flash Flood Watch
Flood Advisory
Flood Statement
Flood Warning
Flood Watch
Heat Advisory
Hydrologic Statement
Lake Wind Advisory
Lakeshore Flood Advisory
Rip Current Statement
Severe Thunderstorm Warning
Severe Thunderstorm Watch
Special Weather Statement
Wind Advisory
Additional Severe Weather Maps
Severe Outlook Today
Severe Outlook Today
WSI's Severe Outlook Map displays current Watches, Warnings and Advisories via County Fill colors.
Severe Outlook Tomorrow
Severe Outlook Tomorrow
WSI's Severe Outlook Forecast Map displaying projected Watches, Warnings and Advisories.
THUNDERcast
THUNDERcast
The THUNDERcast map shows areas of probability for regional or national thunderstorms for the current day.
1Km Storm Watch
1Km Storm Watch
The 1Km map allows you to view 1 kilometer (km) resolution radar imagery both nationally and regionally.
Metro Storm Watch
Metro Storm Watch
The Metro map allows you to view 1 kilometer (km) resolution radar imagery.
Advertisements