Alert archive / California / Red Flag Warnings / 2020

Red Flag Warnings in California, September 2020

35 red flag warnings in September 2020. 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 red flag warnings reaches back to 2005.

Red Flag Warnings by county

Each county as a circle sized by its count in September 2020. Tap one for its archive.

Red Flag Warnings
35
Busiest day
September 6, 20209 red flag warnings

Over time

By day

Days in UTC, the clock the archive keeps.

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
Sep 3, 12:39 PM PDTRed Flag WarningMFRModoc31 hr
Sep 4, 10:15 AM PDTRed Flag WarningSGXRiverside, San Bernardino, San Diego56 hr
Sep 4, 1:58 PM PDTRed Flag WarningMFRModoc30 hr
Sep 5, 10:05 AM PDTRed Flag WarningLOX60 hr
Sep 5, 8:22 PM PDTRed Flag WarningMFRModoc, Siskiyou4 days
Sep 6, 5:41 AM PDTRed Flag WarningMFRModoc, Siskiyou66 hr
Sep 6, 8:14 AM PDTRed Flag WarningREVEl Dorado, Lassen, Madera, Modoc, Mono, Nevada and 3 more60 hr
Sep 6, 1:00 PM PDTRed Flag WarningHNXFresno, Kern, Madera, Mariposa, Tulare, Tuolumne3 days
Sep 6, 1:16 PM PDTRed Flag WarningVEFInyo, San Bernardino, Tulare3 days
Sep 6, 2:10 PM PDTRed Flag WarningSTO3 days
Sep 6, 2:16 PM PDTRed Flag WarningEKA70 hr
Sep 6, 2:32 PM PDTRed Flag WarningMTRSan Mateo, Santa Clara, Santa Cruz65 hr
Sep 6, 2:44 PM PDTRed Flag WarningPSRImperial, Riverside, San Bernardino57 hr
Sep 7, 1:09 PM PDTRed Flag WarningSGXOrange, Riverside, San Bernardino, San Diego55 hr
Sep 7, 3:20 PM PDTRed Flag WarningLOXLos Angeles51 hr
Sep 9, 10:15 AM PDTRed Flag WarningPSRImperial, Riverside7 hr
Sep 9, 2:59 PM PDTRed Flag WarningMFRSiskiyou29 hr
Sep 11, 2:32 PM PDTRed Flag WarningMFRModoc, Siskiyou54 hr
Sep 13, 1:52 PM PDTRed Flag WarningMFRModoc, Siskiyou31 hr
Sep 13, 2:27 PM PDTRed Flag WarningSTO30 hr
Sep 13, 7:51 PM PDTRed Flag WarningREVLassen, Modoc, Plumas, Sierra24 hr
Sep 14, 1:04 PM PDTRed Flag WarningMFRModoc, Siskiyou31 hr
Sep 15, 2:39 PM PDTRed Flag WarningMFRModoc, Siskiyou29 hr
Sep 16, 1:34 PM PDTRed Flag WarningMFRModoc30 hr
Sep 16, 3:12 PM PDTRed Flag WarningREVEl Dorado, Lassen, Madera, Modoc, Mono, Nevada and 3 more53 hr
Sep 16, 3:12 PM PDTRed Flag WarningREVLassen, Modoc53 hr
Sep 25, 3:27 AM PDTRed Flag WarningMTRAlameda, Contra Costa, Marin, Napa, Sonoma4 days
Sep 25, 10:08 AM PDTRed Flag WarningSTO3 days
Sep 25, 10:12 AM PDTRed Flag WarningEKA3 days
Sep 26, 2:38 PM PDTRed Flag WarningMFRModoc, Siskiyou67 hr
Sep 27, 1:03 PM PDTRed Flag WarningSGXRiverside, San Bernardino, San Diego52 hr
Sep 27, 3:05 PM PDTRed Flag WarningLOXLos Angeles26 hr
Sep 30, 9:07 AM PDTRed Flag WarningMTRMonterey, San Mateo, Santa Clara, Santa Cruz69 hr
Sep 30, 2:41 PM PDTRed Flag WarningLOX18 hr
Sep 30, 4:28 PM PDTRed Flag WarningEKA52 hr

By county

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

Nearby

Alerts in force nowTornadoes on recordThe radar archive20192021

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. Warning verification from the Mesonet's Cow. Rebuilt daily.