Alert archive / California / Winter Storm Warnings

Winter Storm Warnings in California, 2021

71 winter storm 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 winter storm warnings reaches back to 2005.

Winter Storm Warnings by county

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

Winter Storm Warnings
71
Busiest month
December33 winter storm warnings
Busiest day
December 14, 20215 winter storm 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 2, 1:30 PM PSTWinter Storm WarningSTO60 hr
Jan 2, 1:49 PM PSTWinter Storm WarningMFRSiskiyou56 hr
Jan 3, 3:50 AM PSTWinter Storm WarningEKA42 hr
Jan 23, 1:30 PM PSTWinter Storm WarningHNX64 hr
Jan 24, 3:39 AM PSTWinter Storm WarningVEFSan Bernardino54 hr
Jan 24, 9:53 AM PSTWinter Storm WarningLOX39 hr
Jan 24, 10:12 AM PSTWinter Storm WarningSGXRiverside, San Bernardino, San Diego44 hr
Jan 24, 2:31 PM PSTWinter Storm WarningMFRSiskiyou4 days
Jan 25, 4:13 AM PSTWinter Storm WarningREVAlpine, El Dorado, Lassen, Modoc, Mono, Nevada and 3 more4 days
Jan 25, 1:44 PM PSTWinter Storm WarningVEFInyo4 days
Jan 25, 3:00 PM PSTWinter Storm WarningEKADel Norte, Humboldt, Lake, Mendocino, Trinity45 hr
Jan 25, 4:06 PM PSTWinter Storm WarningSTO4 days
Jan 26, 4:06 AM PSTWinter Storm WarningHNX3 days
Jan 26, 2:20 PM PSTWinter Storm WarningLOX3 days
Jan 27, 3:55 AM PSTWinter Storm WarningLOX56 hr
Jan 27, 12:58 PM PSTWinter Storm WarningSGXRiverside, San Bernardino50 hr
Jan 29, 3:11 PM PSTWinter Storm WarningMFRSiskiyou48 hr
Jan 30, 5:32 AM PSTWinter Storm WarningEKA66 hr
Jan 31, 2:46 PM PSTWinter Storm WarningMFRSiskiyou43 hr
Feb 1, 2:15 AM PSTWinter Storm WarningSTO41 hr
Feb 2, 8:49 PM PSTWinter Storm WarningMFRSiskiyou15 hr
Mar 8, 3:40 AM PSTWinter Storm WarningMFRSiskiyou54 hr
Mar 8, 12:27 PM PSTWinter Storm WarningHNX3 days
Mar 8, 2:25 PM PSTWinter Storm WarningSTO53 hr
Mar 8, 5:45 PM PSTWinter Storm WarningSGXRiverside, San Bernardino, San Diego4 days
Mar 8, 6:02 PM PSTWinter Storm WarningLOX3 days
Mar 13, 1:51 PM PSTWinter Storm WarningSTO50 hr
Mar 13, 2:32 PM PSTWinter Storm WarningMFRSiskiyou46 hr
Mar 17, 3:17 AM PDTWinter Storm WarningEKA38 hr
Mar 17, 11:52 AM PDTWinter Storm WarningMFRSiskiyou25 hr
Apr 23, 9:38 AM PDTWinter Storm WarningSTO65 hr
Apr 23, 11:30 AM PDTWinter Storm WarningHNX57 hr
Oct 23, 11:13 AM PDTWinter Storm WarningHNXFresno, Kern, Madera, Mariposa, Tulare, Tuolumne58 hr
Oct 23, 11:43 AM PDTWinter Storm WarningREVAlpine, El Dorado, Mono, Nevada, Placer57 hr
Oct 23, 2:07 PM PDTWinter Storm WarningVEFInyo56 hr
Oct 23, 3:42 PM PDTWinter Storm WarningSTO54 hr
Nov 7, 2:01 AM PSTWinter Storm WarningMFRSiskiyou53 hr
Nov 7, 3:35 AM PSTWinter Storm WarningEKA51 hr
Dec 10, 1:54 PM PSTWinter Storm WarningEKATrinity39 hr
Dec 10, 2:11 PM PSTWinter Storm WarningREVAlpine, El Dorado, Lassen, Mono, Nevada, Placer and 2 more4 days
Dec 10, 2:33 PM PSTWinter Storm WarningSTO4 days
Dec 10, 3:52 PM PSTWinter Storm WarningMFRModoc, Siskiyou4 days
Dec 11, 1:18 PM PSTWinter Storm WarningVEFInyo3 days
Dec 11, 1:19 PM PSTWinter Storm WarningHNXFresno, Kern, Madera, Mariposa, Tulare, Tuolumne3 days
Dec 12, 5:17 AM PSTWinter Storm WarningEKADel Norte, Humboldt, Trinity41 hr
Dec 13, 1:12 AM PSTWinter Storm WarningLOX43 hr
Dec 13, 3:53 AM PSTWinter Storm WarningSGXRiverside, San Bernardino44 hr
Dec 13, 11:29 PM PSTWinter Storm WarningSTO16 hr
Dec 14, 1:41 PM PSTWinter Storm WarningREVAlpine, El Dorado, Nevada, Placer44 hr
Dec 14, 2:12 PM PSTWinter Storm WarningMFRSiskiyou36 hr
Dec 14, 2:21 PM PSTWinter Storm WarningEKADel Norte, Humboldt, Lake, Mendocino, Trinity32 hr
Dec 14, 3:03 PM PSTWinter Storm WarningSTO43 hr
Dec 15, 8:04 AM PSTWinter Storm WarningHNXFresno, Madera, Mariposa, Tulare, Tuolumne29 hr
Dec 20, 2:35 PM PSTWinter Storm WarningSTO7 days
Dec 20, 2:59 PM PSTWinter Storm WarningHNXFresno, Kern, Madera, Mariposa, Tulare, Tuolumne7 days
Dec 20, 3:23 PM PSTWinter Storm WarningREVAlpine, El Dorado, Lassen, Modoc, Mono, Nevada and 3 more7 days
Dec 21, 1:00 AM PSTWinter Storm WarningVEFInyo5 days
Dec 21, 4:11 AM PSTWinter Storm WarningMFRSiskiyou51 hr
Dec 21, 1:40 PM PSTWinter Storm WarningEKA41 hr
Dec 23, 5:38 AM PSTWinter Storm WarningMFRModoc, Siskiyou4 days
Dec 23, 1:17 PM PSTWinter Storm WarningEKADel Norte, Humboldt, Lake, Mendocino, Trinity4 days
Dec 23, 10:03 PM PSTWinter Storm WarningSGXRiverside, San Bernardino14 hr
Dec 24, 9:00 PM PSTWinter Storm WarningSGXRiverside, San Bernardino32 hr
Dec 24, 9:20 PM PSTWinter Storm WarningLOX31 hr
Dec 26, 1:03 PM PSTWinter Storm WarningVEFInyo30 hr
Dec 26, 1:40 PM PSTWinter Storm WarningSGXRiverside, San Bernardino, San Diego37 hr
Dec 26, 2:19 PM PSTWinter Storm WarningLOX32 hr
Dec 28, 3:33 AM PSTWinter Storm WarningSTO42 hr
Dec 28, 1:26 PM PSTWinter Storm WarningSGXRiverside, San Bernardino, San Diego55 hr
Dec 28, 1:49 PM PSTWinter Storm WarningVEFInyo54 hr
Dec 28, 2:23 PM PSTWinter Storm WarningLOX54 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 14, 20215winter storm warnings
  2. January 24, 20214winter storm warnings
  3. October 23, 20214winter storm warnings
  4. December 10, 20214winter storm warnings
  5. December 28, 20214winter storm warnings
  6. January 25, 20213winter storm warnings
  7. January 26, 20213winter storm warnings
  8. March 8, 20213winter storm warnings
  9. December 20, 20213winter storm warnings
  10. December 21, 20213winter storm warnings
  11. December 26, 20213winter storm warnings
  12. January 2, 20212winter storm 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.