Extreme Cold Warning in Napa County, California
Issued by the National Weather Service and archived by Claims Pages
EXPIRED
2/18/2026 11:25:00 PM (UTC)
Urgency: Expected
Severity: Severe
Certainty: Likely
2/18/2026 11:25:00 PM until 2/19/2026 3:00:00 PM
* WHAT...Very cold conditions with sub-freezing temperatures in the
mid-20s to low-30s expected.
* WHERE...The East Bay Hills and Valleys, Interior Monterey County
and the Santa Lucia Range, Most of San Benito County and the
Cholame Hills in Southeast Monterey County, North Bay Interior
Mountains, North Bay Interior Valleys, Eastern Santa Clara Hills,
and Southern Salinas Valley/Arroyo Seco and Lake San Antonio.
* WHEN...From 1 AM to 9 AM PST Friday.
* IMPACTS...Cold conditions will be hazardous to sensitive
populations such as unhoused individuals. Cold conditions may
damage or kill sensitive crops, plants, and vegetation if
appropriate precautions are not taken. Prolonged exposure to the
cold conditions will lead to hypothermia for people, pets, and
livestock.




