Alert archive / California / 2021

Weather alerts in California, September 2021

246 weather alerts in September 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered any part of the state, so the counties below add up to more than the state.

Weather alerts by county

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

Alerts
246
Warnings
81
Watches
30
Advisories
93
Busiest day
September 9, 202137 alerts

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
Aug 31, 5:12 PM PDTFlash Flood Warning Considerable damage threatPSRImperial, Riverside6 hr
Aug 31, 5:17 PM PDTSevere Thunderstorm WarningSGXRiverside, San Diego58 min
Aug 31, 5:25 PM PDTFlash Flood Warning Considerable damage threatVEFSan Bernardino3 hr
Aug 31, 5:44 PM PDTFlash Flood Warning Considerable damage threatSGXRiverside, San Diego96 min
Aug 31, 5:58 PM PDTFlash Flood Warning Considerable damage threatPSRImperial, Riverside8 hr
Aug 31, 7:08 PM PDTFlash Flood Warning Considerable damage threatVEFSan Bernardino3 hr
Aug 31, 7:41 PM PDTFlash Flood Warning Considerable damage threatPSRImperial8 hr
Aug 31, 8:59 PM PDTHazardous Seas WarningEKA30 hr
Sep 2, 2:39 AM PDTHazardous Seas WarningEKA9 hr
Sep 2, 2:33 PM PDTSmall Craft AdvisoryEKA24 hr
Sep 2, 8:53 PM PDTSmall Craft AdvisoryLOX6 hr
Sep 3, 1:30 AM PDTBeach Hazards StatementSGXOrange, San Diego4 days
Sep 3, 2:00 AM PDTBeach Hazards StatementLOXLos Angeles4 days
Sep 3, 1:17 PM PDTExcessive Heat WatchVEFInyo, San Bernardino37 hr
Sep 3, 1:18 PM PDTExcessive Heat WatchSGXSan Bernardino37 hr
Sep 3, 1:18 PM PDTHeat AdvisorySGXOrange, Riverside, San Bernardino, San Diego9 days
Sep 3, 2:46 PM PDTSmall Craft AdvisoryMTR6 hr
Sep 3, 6:11 PM PDTSmall Craft AdvisoryLOX15 hr
Sep 4, 1:51 AM PDTSmall Craft AdvisoryMTR7 hr
Sep 4, 3:40 AM PDTExcessive Heat WatchHNX23 hr
Sep 4, 3:40 AM PDTHeat AdvisoryHNX64 hr
Sep 4, 1:48 PM PDTHeat AdvisoryLOXLos Angeles, Santa Barbara6 days
Sep 4, 1:50 PM PDTSmall Craft AdvisoryEKA67 hr
Sep 4, 2:09 PM PDTSmall Craft AdvisoryLOX55 hr
Sep 4, 2:30 PM PDTFire Weather WatchMFRModoc23 hr
Sep 4, 2:30 PM PDTRed Flag WarningMFRModoc30 hr
Sep 5, 1:50 AM PDTExcessive Heat WarningSGXSan Bernardino4 days
Sep 5, 2:02 AM PDTExcessive Heat WarningVEFInyo, San Bernardino5 days
Sep 5, 3:00 AM PDTExcessive Heat WarningHNX4 days
Sep 5, 4:26 AM PDTDense Fog AdvisoryLOX5 hr
Sep 5, 6:34 AM PDTDense Fog AdvisoryMTRMarin, Monterey, Napa, City and County of San Francisco, San Mateo, Santa Cruz and 1 more3 hr
Sep 5, 11:29 AM PDTHeat AdvisorySTO3 days
Sep 5, 12:07 PM PDTHeat AdvisoryHNX56 hr
Sep 5, 1:24 PM PDTFire Weather WatchMFRModoc25 hr
Sep 5, 8:10 PM PDTHeat AdvisoryLOXLos Angeles24 hr
Sep 6, 1:55 AM PDTHeat AdvisoryHNX67 hr
Sep 6, 2:01 AM PDTSmall Craft AdvisoryMTR31 hr
Sep 6, 2:32 AM PDTSmall Craft AdvisoryLOX24 hr
Sep 6, 10:01 AM PDTHeat AdvisoryHNX3 days
Sep 6, 10:19 AM PDTExcessive Heat WarningLOX58 hr
Sep 6, 12:12 PM PDTExcessive Heat WarningPSRImperial, Riverside, San Bernardino3 days
Sep 6, 2:00 PM PDTRed Flag WarningMFRModoc, Siskiyou30 hr
Sep 6, 2:32 PM PDTSmall Craft AdvisoryMTR8 days
Sep 7, 2:05 AM PDTSmall Craft AdvisoryMTR4 days
Sep 7, 8:49 AM PDTSmall Craft AdvisoryEKA60 hr
Sep 7, 1:13 PM PDTHeat AdvisorySGXSan Diego5 days
Sep 8, 3:20 AM PDTDense Fog AdvisoryLOX5 hr
Sep 8, 7:50 AM PDTHeat AdvisoryEKALake12 hr
Sep 8, 7:50 AM PDTExcessive Heat WarningHNXKern13 hr
Sep 8, 7:50 AM PDTHeat AdvisoryHNXFresno, Kern, Kings, Madera, Mariposa, Merced and 1 more36 hr
Sep 8, 9:17 AM PDTSmall Craft AdvisoryLOX18 hr
Sep 8, 10:58 AM PDTFire Weather WatchSTO23 hr
Sep 8, 11:04 AM PDTFire Weather WatchMTRAlameda, Contra Costa, Marin, Napa, Sonoma22 hr
Sep 8, 11:14 AM PDTFire Weather WatchREVEl Dorado, Lassen, Nevada, Placer, Plumas, Sierra23 hr
Sep 8, 12:43 PM PDTFire Weather WatchEKA21 hr
Sep 8, 2:31 PM PDTFire Weather WatchMFRModoc, Siskiyou23 hr
Sep 8, 8:42 PM PDTRed Flag WarningMFRModoc, Siskiyou44 hr
Sep 8, 8:47 PM PDTSmall Craft AdvisoryMTR5 days
Sep 9, 3:53 AM PDTRed Flag WarningEKA25 hr
Sep 9, 9:15 AM PDTSmall Craft AdvisoryLOX3 days
Sep 9, 9:30 AM PDTRed Flag WarningMTRAlameda, Contra Costa, Marin, Napa, Sonoma23 hr
Sep 9, 9:48 AM PDTRed Flag WarningSTO37 hr
Sep 9, 10:33 AM PDTRed Flag WarningREVEl Dorado, Lassen, Nevada, Placer, Plumas, Sierra36 hr
Sep 9, 12:40 PM PDTSpecial Weather StatementSGX50 min
Sep 9, 1:05 PM PDTSevere Thunderstorm WarningSGXSan Bernardino40 min
Sep 9, 1:19 PM PDTSevere Thunderstorm Warning Considerable damage threatSGXSan Bernardino22 min
Sep 9, 1:20 PM PDTLake Wind AdvisoryREVAlpine, El Dorado, Nevada, Placer31 hr
Sep 9, 1:21 PM PDTSpecial Weather StatementPSRRiverside24 min
Sep 9, 1:29 PM PDTSevere Thunderstorm WarningPSRRiverside46 min
Sep 9, 1:47 PM PDTSevere Thunderstorm WarningVEFSan Bernardino58 min
Sep 9, 1:58 PM PDTSpecial Weather StatementPSRRiverside32 min
Sep 9, 2:00 PM PDTSevere Thunderstorm WarningPSRRiverside45 min
Sep 9, 2:12 PM PDTAreal Flood AdvisorySGXSan Diego3 hr
Sep 9, 2:14 PM PDTSpecial Weather StatementHNXKern46 min
Sep 9, 2:31 PM PDTSpecial Weather StatementPSRRiverside29 min
Sep 9, 2:31 PM PDTSevere Thunderstorm WarningVEFSan Bernardino59 min
Sep 9, 2:34 PM PDTFlash Flood Warning Considerable damage threatSGXSan Bernardino3 hr
Sep 9, 2:38 PM PDTSpecial Weather StatementHNX22 min
Sep 9, 2:44 PM PDTMesoscale DiscussionSPCKern, San Bernardino2 hr
Sep 9, 2:54 PM PDTSevere Thunderstorm WarningSGXSan Bernardino66 min
Sep 9, 3:07 PM PDTSpecial Weather StatementHNX23 min
Sep 9, 3:10 PM PDTSevere Thunderstorm WarningSGXRiverside, San Bernardino50 min
Sep 9, 3:25 PM PDTSpecial Weather StatementSGX50 min
Sep 9, 3:29 PM PDTSpecial Weather StatementHNX46 min
Sep 9, 3:29 PM PDTFlash Flood Warning Considerable damage threatSGXRiverside, San Bernardino2 hr
Sep 9, 3:42 PM PDTSpecial Weather StatementPSRRiverside33 min
Sep 9, 3:46 PM PDTAreal Flood AdvisorySGXRiverside3 hr
Sep 9, 3:57 PM PDTSpecial Weather StatementHNX33 min
Sep 9, 4:15 PM PDTSpecial Weather StatementPSRRiverside45 min
Sep 9, 4:19 PM PDTSpecial Weather StatementHNXKern26 min
Sep 9, 4:33 PM PDTFlash Flood Warning Considerable damage threatSGXRiverside88 min
Sep 9, 4:35 PM PDTSpecial Weather StatementHNX25 min
Sep 9, 4:35 PM PDTSevere Thunderstorm WarningSGXRiverside, San Bernardino55 min
Sep 9, 5:02 PM PDTSpecial Weather StatementHNX28 min
Sep 9, 5:06 PM PDTSpecial Weather StatementHNXKern24 min
Sep 9, 5:07 PM PDTAreal Flood AdvisoryLOXLos Angeles3 hr
Sep 9, 5:14 PM PDTSpecial Weather StatementPSRRiverside31 min
Sep 9, 5:27 PM PDTAreal Flood AdvisoryREVLassen63 min
Sep 9, 5:42 PM PDTSpecial Weather StatementHNXTulare33 min
Sep 9, 5:47 PM PDTFlash Flood Warning Considerable damage threatPSRRiverside3 hr
Sep 9, 5:52 PM PDTSpecial Weather StatementPSRRiverside23 min
Sep 9, 6:08 PM PDTSpecial Weather StatementHNX37 min
Sep 9, 7:38 PM PDTSpecial Weather StatementHNXTulare22 min
Sep 9, 8:29 PM PDTSpecial Weather StatementHNXFresno46 min
Sep 9, 9:14 PM PDTSmall Craft AdvisoryEKA8 days
Sep 10, 12:01 AM PDTAreal Flood AdvisoryLOXLos Angeles18 min
Sep 10, 12:19 AM PDTFlash Flood WarningLOXLos Angeles3 hr
Sep 10, 1:48 AM PDTExcessive Heat WarningVEFSan Bernardino4 days
Sep 10, 2:19 AM PDTExcessive Heat WarningPSRImperial, Riverside, San Bernardino4 days
Sep 10, 3:28 AM PDTSmall Craft AdvisoryMTR42 hr
Sep 10, 9:01 AM PDTSmall Craft AdvisoryLOX48 hr
Sep 10, 1:15 PM PDTAreal Flood AdvisorySGXRiverside, San Diego3 hr
Sep 10, 2:24 PM PDTFlash Flood Warning Considerable damage threatSGXSan Diego2 hr
Sep 10, 3:06 PM PDTSpecial Weather StatementSGXSan Diego54 min
Sep 10, 3:13 PM PDTAreal Flood AdvisorySGXRiverside108 min
Sep 10, 4:03 PM PDTSevere Thunderstorm WarningPSRImperial42 min
Sep 10, 4:22 PM PDTFlash Flood Warning Considerable damage threatPSRImperial5 hr
Sep 10, 5:11 PM PDTDust Storm AdvisoryPSRImperial94 min
Sep 11, 2:30 AM PDTSmall Craft AdvisoryMTR24 hr
Sep 11, 2:35 AM PDTHeat AdvisoryLOXLos Angeles17 hr
Sep 11, 2:35 AM PDTWind AdvisoryLOX24 hr
Sep 11, 3:05 AM PDTGale WatchEKA24 hr
Sep 11, 3:05 AM PDTSmall Craft AdvisoryEKA5 days
Sep 12, 2:01 AM PDTBeach Hazards StatementSGXSan Diego4 days
Sep 12, 2:01 AM PDTHigh Surf AdvisorySGXOrange4 days
Sep 12, 2:36 AM PDTGale WarningEKA48 hr
Sep 12, 5:11 AM PDTBeach Hazards StatementLOXLos Angeles4 days
Sep 12, 10:42 AM PDTFire Weather WatchEKA17 hr
Sep 12, 10:42 AM PDTFire Weather WatchMFRSiskiyou3 hr
Sep 12, 1:56 PM PDTRed Flag WarningMFRSiskiyou41 hr
Sep 12, 2:13 PM PDTSmall Craft AdvisoryLOX37 hr
Sep 13, 3:01 AM PDTSmall Craft AdvisoryLOX24 hr
Sep 13, 3:39 AM PDTRed Flag WarningEKA26 hr
Sep 14, 2:43 AM PDTSmall Craft AdvisoryMTR18 hr
Sep 14, 2:59 AM PDTHazardous Seas WarningEKA21 hr
Sep 14, 2:52 PM PDTSmall Craft AdvisoryMTR66 hr
Sep 15, 3:27 AM PDTGale WarningEKA36 hr
Sep 15, 3:27 AM PDTHazardous Seas WarningEKA47 hr
Sep 15, 1:33 PM PDTFire Weather WatchREVLassen, Modoc46 hr
Sep 15, 1:33 PM PDTFire Weather WatchREVMadera, Mono69 hr
Sep 15, 8:06 PM PDTHazardous Seas WarningEKA7 hr
Sep 16, 2:19 PM PDTFlash Flood WatchMFRSiskiyou49 hr
Sep 16, 2:41 PM PDTWind AdvisoryMFRModoc56 hr
Sep 17, 3:07 AM PDTSmall Craft AdvisoryMTR6 hr
Sep 17, 9:27 AM PDTFire Weather WatchHNXFresno, Kern, Tulare7 hr
Sep 17, 11:25 AM PDTFire Weather WatchSTO48 hr
Sep 17, 11:35 AM PDTRed Flag WarningREVLassen, Modoc32 hr
Sep 17, 11:38 AM PDTLake Wind AdvisoryREVAlpine, El Dorado, Nevada, Placer32 hr
Sep 17, 12:50 PM PDTFire Weather WatchMTR45 hr
Sep 17, 2:16 PM PDTGale WatchLOX24 hr
Sep 17, 2:16 PM PDTSmall Craft AdvisoryLOX54 hr
Sep 17, 2:38 PM PDTFire Weather WatchEKA44 hr
Sep 17, 2:40 PM PDTSpecial Weather StatementPSRRiverside50 min
Sep 17, 3:08 PM PDTSevere Thunderstorm WarningPSRRiverside52 min
Sep 17, 3:17 PM PDTAreal Flood AdvisoryPSRRiverside25 min
Sep 17, 3:33 PM PDTFlash Flood Warning Considerable damage threatPSRRiverside5 hr
Sep 17, 4:11 PM PDTSpecial Weather StatementPSRImperial49 min
Sep 17, 4:25 PM PDTSpecial Weather StatementPSRRiverside50 min
Sep 17, 4:47 PM PDTRed Flag WarningHNXFresno, Kern, Tulare51 hr
Sep 17, 5:09 PM PDTSpecial Weather StatementPSRImperial51 min
Sep 17, 5:41 PM PDTAreal Flood AdvisoryPSRImperial, Riverside2 hr
Sep 18, 3:00 AM PDTSmall Craft AdvisoryMTR24 hr
Sep 18, 3:00 AM PDTSmall Craft AdvisoryMTR60 hr
Sep 18, 2:07 PM PDTGale WarningLOX12 hr
Sep 18, 4:23 PM PDTWind AdvisoryHNXKern30 hr
Sep 19, 1:43 AM PDTLake Wind AdvisoryREVAlpine, El Dorado, Nevada, Placer20 hr
Sep 19, 3:23 AM PDTSmall Craft AdvisoryEKA54 hr
Sep 19, 9:06 AM PDTGale WarningLOX11 hr
Sep 19, 9:46 AM PDTRed Flag WarningMTRAlameda, Contra Costa34 hr
Sep 19, 10:21 AM PDTRed Flag WarningEKA40 hr
Sep 19, 10:58 AM PDTRed Flag WarningSTO45 hr
Sep 19, 1:19 PM PDTWind AdvisoryLOX18 hr
Sep 19, 8:00 PM PDTSmall Craft AdvisoryLOX13 hr
Sep 20, 3:09 AM PDTWind AdvisorySTO13 hr
Sep 20, 9:09 AM PDTSmall Craft AdvisoryLOX6 hr
Sep 20, 12:33 PM PDTHeat AdvisorySGXOrange, Riverside, San Bernardino, San Diego55 hr
Sep 20, 1:25 PM PDTHeat AdvisoryLOXLos Angeles55 hr
Sep 21, 2:56 AM PDTSmall Craft AdvisoryLOX6 hr
Sep 21, 8:30 PM PDTSmall Craft AdvisoryMTR25 hr
Sep 21, 8:32 PM PDTSmall Craft AdvisoryEKA60 hr
Sep 22, 2:47 AM PDTSmall Craft AdvisoryLOX30 hr
Sep 22, 5:09 AM PDTDense Fog AdvisoryLOX4 hr
Sep 23, 1:13 PM PDTSpecial Weather StatementPSRRiverside47 min
Sep 23, 2:48 PM PDTSpecial Weather StatementPSRRiverside42 min
Sep 23, 7:44 PM PDTSmall Craft AdvisoryMTR25 hr
Sep 24, 7:10 AM PDTSpecial Weather StatementPSRImperial50 min
Sep 24, 7:28 AM PDTAreal Flood AdvisoryPSRImperial46 min
Sep 24, 7:33 AM PDTSevere Thunderstorm WarningPSRImperial42 min
Sep 24, 8:00 AM PDTSpecial Weather StatementPSRImperial45 min
Sep 24, 8:14 AM PDTFlash Flood Warning Considerable damage threatPSRImperial4 hr
Sep 24, 8:18 AM PDTSpecial Weather StatementPSRImperial42 min
Sep 24, 8:56 AM PDTFlash Flood WatchSGXRiverside, San Diego10 hr
Sep 24, 9:03 AM PDTFlash Flood WatchPSRImperial, Riverside, San Bernardino10 hr
Sep 24, 11:08 AM PDTBeach Hazards StatementSGXOrange, San Diego8 hr
Sep 24, 12:00 PM PDTFire Weather WatchREVEl Dorado, Lassen, Madera, Modoc, Mono, Nevada and 3 more64 hr
Sep 24, 12:13 PM PDTSevere Thunderstorm WarningSGXSan Diego31 min
Sep 24, 12:21 PM PDTFlash Flood Warning Considerable damage threatSGXSan Diego56 min
Sep 24, 1:24 PM PDTSevere Thunderstorm WarningSGXSan Diego51 min
Sep 24, 1:28 PM PDTFlash Flood Warning Considerable damage threatSGXSan Diego2 hr
Sep 24, 1:49 PM PDTAreal Flood AdvisoryVEFSan Bernardino3 hr
Sep 24, 2:09 PM PDTFlash Flood Warning Considerable damage threatSGXSan Diego3 hr
Sep 24, 2:11 PM PDTSevere Thunderstorm WarningVEFSan Bernardino49 min
Sep 24, 2:18 PM PDTAreal Flood AdvisoryVEFSan Bernardino3 hr
Sep 24, 2:41 PM PDTSevere Thunderstorm WarningSGXSan Diego64 min
Sep 24, 2:59 PM PDTSpecial Weather StatementSGXSan Diego61 min
Sep 24, 3:14 PM PDTSpecial Marine WarningSGX91 min
Sep 24, 3:20 PM PDTSevere Thunderstorm WarningSGXSan Diego55 min
Sep 24, 3:30 PM PDTMesoscale DiscussionSPCSan Diego90 min
Sep 24, 3:47 PM PDTSpecial Weather StatementSGXOrange58 min
Sep 24, 3:56 PM PDTSpecial Marine WarningSGX94 min
Sep 24, 4:20 PM PDTSpecial Marine WarningLOX85 min
Sep 24, 4:40 PM PDTSpecial Marine WarningSGX65 min
Sep 24, 4:55 PM PDTSpecial Marine WarningLOX65 min
Sep 24, 5:18 PM PDTSpecial Marine WarningSGX57 min
Sep 25, 2:20 AM PDTSmall Craft AdvisoryMTR8 days
Sep 25, 5:00 AM PDTFire Weather WatchMFRModoc9 hr
Sep 25, 2:12 PM PDTRed Flag WarningMFRModoc29 hr
Sep 25, 3:03 PM PDTSmall Craft AdvisoryMTR11 hr
Sep 26, 2:43 AM PDTSmall Craft AdvisoryLOX54 hr
Sep 26, 9:28 AM PDTRed Flag WarningREVEl Dorado, Lassen, Madera, Modoc, Mono, Nevada and 3 more42 hr
Sep 26, 12:36 PM PDTLake Wind AdvisoryREVAlpine, El Dorado, Nevada, Placer39 hr
Sep 26, 2:02 PM PDTSmall Craft AdvisoryMTR12 hr
Sep 26, 3:16 PM PDTSmall Craft AdvisoryEKA66 hr
Sep 26, 8:48 PM PDTGale WatchLOX19 hr
Sep 27, 12:08 AM PDTWind AdvisoryHNXKern47 hr
Sep 27, 2:26 AM PDTSmall Craft AdvisoryMTR4 days
Sep 27, 3:01 AM PDTFreeze WatchMFRModoc, Siskiyou11 hr
Sep 27, 3:15 AM PDTFrost AdvisoryEKALake, Mendocino, Trinity30 hr
Sep 27, 3:42 AM PDTWind AdvisoryLOX47 hr
Sep 27, 9:21 AM PDTSmall Craft AdvisoryLOX6 hr
Sep 27, 11:31 AM PDTBeach Hazards StatementMTRMarin, Monterey, City and County of San Francisco, San Mateo, Santa Cruz, Sonoma35 hr
Sep 27, 2:20 PM PDTFreeze WarningMFRModoc, Siskiyou44 hr
Sep 27, 3:38 PM PDTGale WarningLOX35 hr
Sep 28, 2:40 AM PDTSmall Craft AdvisoryMTR48 hr
Sep 28, 2:48 AM PDTSmall Craft AdvisoryLOX48 hr
Sep 28, 2:50 AM PDTRed Flag WarningSTO17 hr
Sep 28, 3:43 AM PDTFrost AdvisoryMFRSiskiyou30 hr
Sep 28, 1:04 PM PDTFrost AdvisoryEKAHumboldt, Mendocino, Trinity20 hr
Sep 28, 2:26 PM PDTWind AdvisoryLOX12 hr
Sep 28, 5:50 PM PDTFire Weather WatchMTR17 hr
Sep 29, 10:27 AM PDTRed Flag WarningMTR22 hr
Sep 29, 2:18 PM PDTGale WatchEKA24 hr
Sep 29, 2:18 PM PDTSmall Craft AdvisoryEKA4 days
Sep 29, 2:18 PM PDTHazardous Seas WatchEKA24 hr
Sep 30, 2:40 PM PDTGale WarningEKA30 hr
Sep 30, 2:40 PM PDTHazardous Seas WarningEKA48 hr

By product

Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.

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 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.