Alert archive / California / Freeze Warnings

Freeze Warnings in California, 2021

45 freeze warnings in 2021. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of freeze warnings reaches back to 2005.

Freeze Warnings by county

Each county as a circle sized by its count in 2021. Tap one for its archive.

Freeze Warnings
45
Busiest month
March15 freeze warnings
Busiest day
December 10, 20216 freeze warnings

Over time

By month

The alerts

Every alert, in the order issued. Times are local, Pacific Time. Each opens its own page with the text, the map, the radar and the sounding.

IssuedProductOfficeCountiesLasted
Jan 25, 2:42 PM PSTFreeze WarningMTRAlameda, Contra Costa, Marin, Monterey, Napa, Santa Clara and 1 more17 hr
Feb 28, 3:10 PM PSTFreeze WarningEKALake, Mendocino17 hr
Mar 1, 6:34 PM PSTFreeze WarningEKALake, Mendocino14 hr
Mar 4, 1:07 AM PSTFreeze WarningEKALake, Mendocino7 hr
Mar 6, 3:32 AM PSTFreeze WarningEKALake, Mendocino29 hr
Mar 7, 2:04 PM PSTFreeze WarningEKALake, Mendocino17 hr
Mar 10, 2:31 PM PSTFreeze WarningEKA18 hr
Mar 11, 1:04 PM PSTFreeze WarningEKALake, Mendocino20 hr
Mar 12, 1:43 PM PSTFreeze WarningEKALake, Mendocino19 hr
Mar 13, 12:36 PM PSTFreeze WarningEKALake, Mendocino18 hr
Mar 15, 1:38 PM PDTFreeze WarningEKADel Norte, Humboldt, Mendocino19 hr
Mar 16, 1:27 PM PDTFreeze WarningEKALake, Mendocino20 hr
Mar 20, 2:30 PM PDTFreeze WarningEKAMendocino18 hr
Mar 22, 3:28 AM PDTFreeze WarningEKALake, Mendocino30 hr
Mar 23, 2:04 PM PDTFreeze WarningEKALake, Mendocino19 hr
Mar 25, 2:12 PM PDTFreeze WarningEKALake, Mendocino19 hr
Mar 29, 2:24 PM PDTFreeze WarningEKAHumboldt, Lake, Mendocino19 hr
Apr 26, 2:10 PM PDTFreeze WarningEKALake, Mendocino, Trinity18 hr
May 20, 2:40 AM PDTFreeze WarningREVLassen, Modoc, Plumas, Sierra12 hr
Jun 6, 1:13 PM PDTFreeze WarningMFRModoc, Siskiyou19 hr
Jun 8, 12:09 PM PDTFreeze WarningEKAHumboldt, Lake, Trinity21 hr
Jun 9, 12:04 PM PDTFreeze WarningEKALake, Mendocino, Trinity21 hr
Sep 27, 2:20 PM PDTFreeze WarningMFRModoc, Siskiyou44 hr
Oct 8, 1:52 PM PDTFreeze WarningMFRSiskiyou19 hr
Oct 8, 8:21 PM PDTFreeze WarningVEF12 hr
Oct 10, 2:30 AM PDTFreeze WarningREVLassen, Modoc, Plumas, Sierra3 days
Oct 11, 1:36 PM PDTFreeze WarningMFRSiskiyou19 hr
Oct 11, 2:11 PM PDTFreeze WarningEKADel Norte, Humboldt, Lake, Mendocino19 hr
Oct 13, 2:15 PM PDTFreeze WarningEKAHumboldt, Lake, Mendocino, Trinity19 hr
Nov 21, 10:25 PM PSTFreeze WarningEKAMendocino12 hr
Nov 23, 2:30 AM PSTFreeze WarningEKADel Norte, Humboldt25 hr
Nov 24, 2:02 PM PSTFreeze WarningLOX19 hr
Nov 25, 2:05 PM PSTFreeze WarningLOX19 hr
Dec 9, 3:23 AM PSTFreeze WarningEKAHumboldt, Mendocino30 hr
Dec 10, 1:05 AM PSTFreeze WarningVEFSan Bernardino31 hr
Dec 10, 1:13 AM PSTFreeze WarningPSRImperial, Riverside, San Bernardino31 hr
Dec 10, 2:00 AM PSTFreeze WarningHNXFresno, Kern, Kings, Madera, Mariposa, Merced and 1 more31 hr
Dec 10, 3:08 AM PSTFreeze WarningLOXSanta Barbara29 hr
Dec 10, 1:42 PM PSTFreeze WarningMTRMarin, Monterey, Napa, San Benito, Sonoma18 hr
Dec 10, 2:59 PM PSTFreeze WarningEKAHumboldt, Lake, Mendocino18 hr
Dec 11, 1:23 PM PSTFreeze WarningPSRImperial, Riverside19 hr
Dec 11, 5:35 PM PSTFreeze WarningMTRMonterey, San Benito14 hr
Dec 14, 9:47 PM PSTFreeze WarningLOXLos Angeles11 hr
Dec 18, 12:08 AM PSTFreeze WarningLOX9 hr
Dec 29, 3:24 AM PSTFreeze WarningEKADel Norte, Humboldt, Mendocino30 hr

By county

Every county with at least one alert. A county page lists each alert that covered it.

The busiest days

Days with the most alerts issued, by UTC date.

  1. December 10, 20216freeze warnings
  2. October 11, 20212freeze warnings
  3. January 25, 20211freeze warnings
  4. February 28, 20211freeze warnings
  5. March 2, 20211freeze warnings
  6. March 4, 20211freeze warnings
  7. March 6, 20211freeze warnings
  8. March 7, 20211freeze warnings
  9. March 10, 20211freeze warnings
  10. March 11, 20211freeze warnings
  11. March 12, 20211freeze warnings
  12. March 13, 20211freeze warnings

Nearby

Alerts in force nowTornadoes on recordThe radar archive20202022

Sources

National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Rebuilt daily.