Logo

Napa County Alerts
Noaa Logo 2
NOAA's National Weather Service
Each location shows all alerts on one page
WARNINGS - WATCHES - ADVISORIES - STATEMENTS
Updates every 15 Minutes
Alert Summary | Alert RSS Feed | Alert Archives | Icon key
Updated:February 20, 2026 3:30 pm PST

Cold Weather Advisory COLD WEATHER ADVISORY  
Napa County

  Effective: Fri, 2/20 12:00pm Severity:  Moderate 
  Updated: February 20, 2026 3:30 pm Urgency: Expected
  Expires: Sat, 2/21 4:00am Certainty: Likely

Areas Affected: North Bay Interior Mountains - North Bay Interior Valleys - East Bay Interior Valleys - Santa Clara Valley Including San Jose - Northern Salinas Valley/Hollister Valley and Carmel Valley
 
Alert Details:
* WHAT...Cold conditions with temperatures as low as 33 expected.
Slightly warmer conditions will be found across portions of the
northern Salinas Valley and Carmel Valley where low temperatures
range from 36 to 40 degrees.

* WHERE...The Santa Clara Valley, North Bay Interior Valleys and
Mountains, East Bay Interior Valleys, and Northern Salinas Valley
and Hollister Valley.

* WHEN...From 1 AM to 9 AM PST Saturday.

* IMPACTS...Cold conditions will be hazardous to sensitive
populations such as unhoused individuals. Prolonged exposure to the
cold conditions will lead to hypothermia for people, pets, and
livestock. Cold conditions may damage or kill sensitive crops,
plants, and vegetation if appropriate precautions are not taken.

Information:
Make frequent checks on older family, friends, and neighbors and
ensure that they have adequate shelter and/or warmth.

Check with your local, city, or county officials for information on
available warming centers.

Be sure to dress in layers if outdoors. Make sure that pets and
livestock have adequate food, unfrozen water, and warmth. Cover or
tend to sensitive crops, plants, and vegetation.