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.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 31, 5:12 PM PDT | Flash Flood Warning | PSR | Imperial, Riverside | 6 hr |
| Aug 31, 5:17 PM PDT | Severe Thunderstorm Warning | SGX | Riverside, San Diego | 58 min |
| Aug 31, 5:25 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 31, 5:44 PM PDT | Flash Flood Warning | SGX | Riverside, San Diego | 96 min |
| Aug 31, 5:58 PM PDT | Flash Flood Warning | PSR | Imperial, Riverside | 8 hr |
| Aug 31, 7:08 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 31, 7:41 PM PDT | Flash Flood Warning | PSR | Imperial | 8 hr |
| Aug 31, 8:59 PM PDT | Hazardous Seas Warning | EKA | 30 hr | |
| Sep 2, 2:39 AM PDT | Hazardous Seas Warning | EKA | 9 hr | |
| Sep 2, 2:33 PM PDT | Small Craft Advisory | EKA | 24 hr | |
| Sep 2, 8:53 PM PDT | Small Craft Advisory | LOX | 6 hr | |
| Sep 3, 1:30 AM PDT | Beach Hazards Statement | SGX | Orange, San Diego | 4 days |
| Sep 3, 2:00 AM PDT | Beach Hazards Statement | LOX | Los Angeles | 4 days |
| Sep 3, 1:17 PM PDT | Excessive Heat Watch | VEF | Inyo, San Bernardino | 37 hr |
| Sep 3, 1:18 PM PDT | Excessive Heat Watch | SGX | San Bernardino | 37 hr |
| Sep 3, 1:18 PM PDT | Heat Advisory | SGX | Orange, Riverside, San Bernardino, San Diego | 9 days |
| Sep 3, 2:46 PM PDT | Small Craft Advisory | MTR | 6 hr | |
| Sep 3, 6:11 PM PDT | Small Craft Advisory | LOX | 15 hr | |
| Sep 4, 1:51 AM PDT | Small Craft Advisory | MTR | 7 hr | |
| Sep 4, 3:40 AM PDT | Excessive Heat Watch | HNX | 23 hr | |
| Sep 4, 3:40 AM PDT | Heat Advisory | HNX | 64 hr | |
| Sep 4, 1:48 PM PDT | Heat Advisory | LOX | Los Angeles, Santa Barbara | 6 days |
| Sep 4, 1:50 PM PDT | Small Craft Advisory | EKA | 67 hr | |
| Sep 4, 2:09 PM PDT | Small Craft Advisory | LOX | 55 hr | |
| Sep 4, 2:30 PM PDT | Fire Weather Watch | MFR | Modoc | 23 hr |
| Sep 4, 2:30 PM PDT | Red Flag Warning | MFR | Modoc | 30 hr |
| Sep 5, 1:50 AM PDT | Excessive Heat Warning | SGX | San Bernardino | 4 days |
| Sep 5, 2:02 AM PDT | Excessive Heat Warning | VEF | Inyo, San Bernardino | 5 days |
| Sep 5, 3:00 AM PDT | Excessive Heat Warning | HNX | 4 days | |
| Sep 5, 4:26 AM PDT | Dense Fog Advisory | LOX | 5 hr | |
| Sep 5, 6:34 AM PDT | Dense Fog Advisory | MTR | Marin, Monterey, Napa, City and County of San Francisco, San Mateo, Santa Cruz and 1 more | 3 hr |
| Sep 5, 11:29 AM PDT | Heat Advisory | STO | 3 days | |
| Sep 5, 12:07 PM PDT | Heat Advisory | HNX | 56 hr | |
| Sep 5, 1:24 PM PDT | Fire Weather Watch | MFR | Modoc | 25 hr |
| Sep 5, 8:10 PM PDT | Heat Advisory | LOX | Los Angeles | 24 hr |
| Sep 6, 1:55 AM PDT | Heat Advisory | HNX | 67 hr | |
| Sep 6, 2:01 AM PDT | Small Craft Advisory | MTR | 31 hr | |
| Sep 6, 2:32 AM PDT | Small Craft Advisory | LOX | 24 hr | |
| Sep 6, 10:01 AM PDT | Heat Advisory | HNX | 3 days | |
| Sep 6, 10:19 AM PDT | Excessive Heat Warning | LOX | 58 hr | |
| Sep 6, 12:12 PM PDT | Excessive Heat Warning | PSR | Imperial, Riverside, San Bernardino | 3 days |
| Sep 6, 2:00 PM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 30 hr |
| Sep 6, 2:32 PM PDT | Small Craft Advisory | MTR | 8 days | |
| Sep 7, 2:05 AM PDT | Small Craft Advisory | MTR | 4 days | |
| Sep 7, 8:49 AM PDT | Small Craft Advisory | EKA | 60 hr | |
| Sep 7, 1:13 PM PDT | Heat Advisory | SGX | San Diego | 5 days |
| Sep 8, 3:20 AM PDT | Dense Fog Advisory | LOX | 5 hr | |
| Sep 8, 7:50 AM PDT | Heat Advisory | EKA | Lake | 12 hr |
| Sep 8, 7:50 AM PDT | Excessive Heat Warning | HNX | Kern | 13 hr |
| Sep 8, 7:50 AM PDT | Heat Advisory | HNX | Fresno, Kern, Kings, Madera, Mariposa, Merced and 1 more | 36 hr |
| Sep 8, 9:17 AM PDT | Small Craft Advisory | LOX | 18 hr | |
| Sep 8, 10:58 AM PDT | Fire Weather Watch | STO | 23 hr | |
| Sep 8, 11:04 AM PDT | Fire Weather Watch | MTR | Alameda, Contra Costa, Marin, Napa, Sonoma | 22 hr |
| Sep 8, 11:14 AM PDT | Fire Weather Watch | REV | El Dorado, Lassen, Nevada, Placer, Plumas, Sierra | 23 hr |
| Sep 8, 12:43 PM PDT | Fire Weather Watch | EKA | 21 hr | |
| Sep 8, 2:31 PM PDT | Fire Weather Watch | MFR | Modoc, Siskiyou | 23 hr |
| Sep 8, 8:42 PM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 44 hr |
| Sep 8, 8:47 PM PDT | Small Craft Advisory | MTR | 5 days | |
| Sep 9, 3:53 AM PDT | Red Flag Warning | EKA | 25 hr | |
| Sep 9, 9:15 AM PDT | Small Craft Advisory | LOX | 3 days | |
| Sep 9, 9:30 AM PDT | Red Flag Warning | MTR | Alameda, Contra Costa, Marin, Napa, Sonoma | 23 hr |
| Sep 9, 9:48 AM PDT | Red Flag Warning | STO | 37 hr | |
| Sep 9, 10:33 AM PDT | Red Flag Warning | REV | El Dorado, Lassen, Nevada, Placer, Plumas, Sierra | 36 hr |
| Sep 9, 12:40 PM PDT | Special Weather Statement | SGX | 50 min | |
| Sep 9, 1:05 PM PDT | Severe Thunderstorm Warning | SGX | San Bernardino | 40 min |
| Sep 9, 1:19 PM PDT | Severe Thunderstorm Warning | SGX | San Bernardino | 22 min |
| Sep 9, 1:20 PM PDT | Lake Wind Advisory | REV | Alpine, El Dorado, Nevada, Placer | 31 hr |
| Sep 9, 1:21 PM PDT | Special Weather Statement | PSR | Riverside | 24 min |
| Sep 9, 1:29 PM PDT | Severe Thunderstorm Warning | PSR | Riverside | 46 min |
| Sep 9, 1:47 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 58 min |
| Sep 9, 1:58 PM PDT | Special Weather Statement | PSR | Riverside | 32 min |
| Sep 9, 2:00 PM PDT | Severe Thunderstorm Warning | PSR | Riverside | 45 min |
| Sep 9, 2:12 PM PDT | Areal Flood Advisory | SGX | San Diego | 3 hr |
| Sep 9, 2:14 PM PDT | Special Weather Statement | HNX | Kern | 46 min |
| Sep 9, 2:31 PM PDT | Special Weather Statement | PSR | Riverside | 29 min |
| Sep 9, 2:31 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 59 min |
| Sep 9, 2:34 PM PDT | Flash Flood Warning | SGX | San Bernardino | 3 hr |
| Sep 9, 2:38 PM PDT | Special Weather Statement | HNX | 22 min | |
| Sep 9, 2:44 PM PDT | Mesoscale Discussion | SPC | Kern, San Bernardino | 2 hr |
| Sep 9, 2:54 PM PDT | Severe Thunderstorm Warning | SGX | San Bernardino | 66 min |
| Sep 9, 3:07 PM PDT | Special Weather Statement | HNX | 23 min | |
| Sep 9, 3:10 PM PDT | Severe Thunderstorm Warning | SGX | Riverside, San Bernardino | 50 min |
| Sep 9, 3:25 PM PDT | Special Weather Statement | SGX | 50 min | |
| Sep 9, 3:29 PM PDT | Special Weather Statement | HNX | 46 min | |
| Sep 9, 3:29 PM PDT | Flash Flood Warning | SGX | Riverside, San Bernardino | 2 hr |
| Sep 9, 3:42 PM PDT | Special Weather Statement | PSR | Riverside | 33 min |
| Sep 9, 3:46 PM PDT | Areal Flood Advisory | SGX | Riverside | 3 hr |
| Sep 9, 3:57 PM PDT | Special Weather Statement | HNX | 33 min | |
| Sep 9, 4:15 PM PDT | Special Weather Statement | PSR | Riverside | 45 min |
| Sep 9, 4:19 PM PDT | Special Weather Statement | HNX | Kern | 26 min |
| Sep 9, 4:33 PM PDT | Flash Flood Warning | SGX | Riverside | 88 min |
| Sep 9, 4:35 PM PDT | Special Weather Statement | HNX | 25 min | |
| Sep 9, 4:35 PM PDT | Severe Thunderstorm Warning | SGX | Riverside, San Bernardino | 55 min |
| Sep 9, 5:02 PM PDT | Special Weather Statement | HNX | 28 min | |
| Sep 9, 5:06 PM PDT | Special Weather Statement | HNX | Kern | 24 min |
| Sep 9, 5:07 PM PDT | Areal Flood Advisory | LOX | Los Angeles | 3 hr |
| Sep 9, 5:14 PM PDT | Special Weather Statement | PSR | Riverside | 31 min |
| Sep 9, 5:27 PM PDT | Areal Flood Advisory | REV | Lassen | 63 min |
| Sep 9, 5:42 PM PDT | Special Weather Statement | HNX | Tulare | 33 min |
| Sep 9, 5:47 PM PDT | Flash Flood Warning | PSR | Riverside | 3 hr |
| Sep 9, 5:52 PM PDT | Special Weather Statement | PSR | Riverside | 23 min |
| Sep 9, 6:08 PM PDT | Special Weather Statement | HNX | 37 min | |
| Sep 9, 7:38 PM PDT | Special Weather Statement | HNX | Tulare | 22 min |
| Sep 9, 8:29 PM PDT | Special Weather Statement | HNX | Fresno | 46 min |
| Sep 9, 9:14 PM PDT | Small Craft Advisory | EKA | 8 days | |
| Sep 10, 12:01 AM PDT | Areal Flood Advisory | LOX | Los Angeles | 18 min |
| Sep 10, 12:19 AM PDT | Flash Flood Warning | LOX | Los Angeles | 3 hr |
| Sep 10, 1:48 AM PDT | Excessive Heat Warning | VEF | San Bernardino | 4 days |
| Sep 10, 2:19 AM PDT | Excessive Heat Warning | PSR | Imperial, Riverside, San Bernardino | 4 days |
| Sep 10, 3:28 AM PDT | Small Craft Advisory | MTR | 42 hr | |
| Sep 10, 9:01 AM PDT | Small Craft Advisory | LOX | 48 hr | |
| Sep 10, 1:15 PM PDT | Areal Flood Advisory | SGX | Riverside, San Diego | 3 hr |
| Sep 10, 2:24 PM PDT | Flash Flood Warning | SGX | San Diego | 2 hr |
| Sep 10, 3:06 PM PDT | Special Weather Statement | SGX | San Diego | 54 min |
| Sep 10, 3:13 PM PDT | Areal Flood Advisory | SGX | Riverside | 108 min |
| Sep 10, 4:03 PM PDT | Severe Thunderstorm Warning | PSR | Imperial | 42 min |
| Sep 10, 4:22 PM PDT | Flash Flood Warning | PSR | Imperial | 5 hr |
| Sep 10, 5:11 PM PDT | Dust Storm Advisory | PSR | Imperial | 94 min |
| Sep 11, 2:30 AM PDT | Small Craft Advisory | MTR | 24 hr | |
| Sep 11, 2:35 AM PDT | Heat Advisory | LOX | Los Angeles | 17 hr |
| Sep 11, 2:35 AM PDT | Wind Advisory | LOX | 24 hr | |
| Sep 11, 3:05 AM PDT | Gale Watch | EKA | 24 hr | |
| Sep 11, 3:05 AM PDT | Small Craft Advisory | EKA | 5 days | |
| Sep 12, 2:01 AM PDT | Beach Hazards Statement | SGX | San Diego | 4 days |
| Sep 12, 2:01 AM PDT | High Surf Advisory | SGX | Orange | 4 days |
| Sep 12, 2:36 AM PDT | Gale Warning | EKA | 48 hr | |
| Sep 12, 5:11 AM PDT | Beach Hazards Statement | LOX | Los Angeles | 4 days |
| Sep 12, 10:42 AM PDT | Fire Weather Watch | EKA | 17 hr | |
| Sep 12, 10:42 AM PDT | Fire Weather Watch | MFR | Siskiyou | 3 hr |
| Sep 12, 1:56 PM PDT | Red Flag Warning | MFR | Siskiyou | 41 hr |
| Sep 12, 2:13 PM PDT | Small Craft Advisory | LOX | 37 hr | |
| Sep 13, 3:01 AM PDT | Small Craft Advisory | LOX | 24 hr | |
| Sep 13, 3:39 AM PDT | Red Flag Warning | EKA | 26 hr | |
| Sep 14, 2:43 AM PDT | Small Craft Advisory | MTR | 18 hr | |
| Sep 14, 2:59 AM PDT | Hazardous Seas Warning | EKA | 21 hr | |
| Sep 14, 2:52 PM PDT | Small Craft Advisory | MTR | 66 hr | |
| Sep 15, 3:27 AM PDT | Gale Warning | EKA | 36 hr | |
| Sep 15, 3:27 AM PDT | Hazardous Seas Warning | EKA | 47 hr | |
| Sep 15, 1:33 PM PDT | Fire Weather Watch | REV | Lassen, Modoc | 46 hr |
| Sep 15, 1:33 PM PDT | Fire Weather Watch | REV | Madera, Mono | 69 hr |
| Sep 15, 8:06 PM PDT | Hazardous Seas Warning | EKA | 7 hr | |
| Sep 16, 2:19 PM PDT | Flash Flood Watch | MFR | Siskiyou | 49 hr |
| Sep 16, 2:41 PM PDT | Wind Advisory | MFR | Modoc | 56 hr |
| Sep 17, 3:07 AM PDT | Small Craft Advisory | MTR | 6 hr | |
| Sep 17, 9:27 AM PDT | Fire Weather Watch | HNX | Fresno, Kern, Tulare | 7 hr |
| Sep 17, 11:25 AM PDT | Fire Weather Watch | STO | 48 hr | |
| Sep 17, 11:35 AM PDT | Red Flag Warning | REV | Lassen, Modoc | 32 hr |
| Sep 17, 11:38 AM PDT | Lake Wind Advisory | REV | Alpine, El Dorado, Nevada, Placer | 32 hr |
| Sep 17, 12:50 PM PDT | Fire Weather Watch | MTR | 45 hr | |
| Sep 17, 2:16 PM PDT | Gale Watch | LOX | 24 hr | |
| Sep 17, 2:16 PM PDT | Small Craft Advisory | LOX | 54 hr | |
| Sep 17, 2:38 PM PDT | Fire Weather Watch | EKA | 44 hr | |
| Sep 17, 2:40 PM PDT | Special Weather Statement | PSR | Riverside | 50 min |
| Sep 17, 3:08 PM PDT | Severe Thunderstorm Warning | PSR | Riverside | 52 min |
| Sep 17, 3:17 PM PDT | Areal Flood Advisory | PSR | Riverside | 25 min |
| Sep 17, 3:33 PM PDT | Flash Flood Warning | PSR | Riverside | 5 hr |
| Sep 17, 4:11 PM PDT | Special Weather Statement | PSR | Imperial | 49 min |
| Sep 17, 4:25 PM PDT | Special Weather Statement | PSR | Riverside | 50 min |
| Sep 17, 4:47 PM PDT | Red Flag Warning | HNX | Fresno, Kern, Tulare | 51 hr |
| Sep 17, 5:09 PM PDT | Special Weather Statement | PSR | Imperial | 51 min |
| Sep 17, 5:41 PM PDT | Areal Flood Advisory | PSR | Imperial, Riverside | 2 hr |
| Sep 18, 3:00 AM PDT | Small Craft Advisory | MTR | 24 hr | |
| Sep 18, 3:00 AM PDT | Small Craft Advisory | MTR | 60 hr | |
| Sep 18, 2:07 PM PDT | Gale Warning | LOX | 12 hr | |
| Sep 18, 4:23 PM PDT | Wind Advisory | HNX | Kern | 30 hr |
| Sep 19, 1:43 AM PDT | Lake Wind Advisory | REV | Alpine, El Dorado, Nevada, Placer | 20 hr |
| Sep 19, 3:23 AM PDT | Small Craft Advisory | EKA | 54 hr | |
| Sep 19, 9:06 AM PDT | Gale Warning | LOX | 11 hr | |
| Sep 19, 9:46 AM PDT | Red Flag Warning | MTR | Alameda, Contra Costa | 34 hr |
| Sep 19, 10:21 AM PDT | Red Flag Warning | EKA | 40 hr | |
| Sep 19, 10:58 AM PDT | Red Flag Warning | STO | 45 hr | |
| Sep 19, 1:19 PM PDT | Wind Advisory | LOX | 18 hr | |
| Sep 19, 8:00 PM PDT | Small Craft Advisory | LOX | 13 hr | |
| Sep 20, 3:09 AM PDT | Wind Advisory | STO | 13 hr | |
| Sep 20, 9:09 AM PDT | Small Craft Advisory | LOX | 6 hr | |
| Sep 20, 12:33 PM PDT | Heat Advisory | SGX | Orange, Riverside, San Bernardino, San Diego | 55 hr |
| Sep 20, 1:25 PM PDT | Heat Advisory | LOX | Los Angeles | 55 hr |
| Sep 21, 2:56 AM PDT | Small Craft Advisory | LOX | 6 hr | |
| Sep 21, 8:30 PM PDT | Small Craft Advisory | MTR | 25 hr | |
| Sep 21, 8:32 PM PDT | Small Craft Advisory | EKA | 60 hr | |
| Sep 22, 2:47 AM PDT | Small Craft Advisory | LOX | 30 hr | |
| Sep 22, 5:09 AM PDT | Dense Fog Advisory | LOX | 4 hr | |
| Sep 23, 1:13 PM PDT | Special Weather Statement | PSR | Riverside | 47 min |
| Sep 23, 2:48 PM PDT | Special Weather Statement | PSR | Riverside | 42 min |
| Sep 23, 7:44 PM PDT | Small Craft Advisory | MTR | 25 hr | |
| Sep 24, 7:10 AM PDT | Special Weather Statement | PSR | Imperial | 50 min |
| Sep 24, 7:28 AM PDT | Areal Flood Advisory | PSR | Imperial | 46 min |
| Sep 24, 7:33 AM PDT | Severe Thunderstorm Warning | PSR | Imperial | 42 min |
| Sep 24, 8:00 AM PDT | Special Weather Statement | PSR | Imperial | 45 min |
| Sep 24, 8:14 AM PDT | Flash Flood Warning | PSR | Imperial | 4 hr |
| Sep 24, 8:18 AM PDT | Special Weather Statement | PSR | Imperial | 42 min |
| Sep 24, 8:56 AM PDT | Flash Flood Watch | SGX | Riverside, San Diego | 10 hr |
| Sep 24, 9:03 AM PDT | Flash Flood Watch | PSR | Imperial, Riverside, San Bernardino | 10 hr |
| Sep 24, 11:08 AM PDT | Beach Hazards Statement | SGX | Orange, San Diego | 8 hr |
| Sep 24, 12:00 PM PDT | Fire Weather Watch | REV | El Dorado, Lassen, Madera, Modoc, Mono, Nevada and 3 more | 64 hr |
| Sep 24, 12:13 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 31 min |
| Sep 24, 12:21 PM PDT | Flash Flood Warning | SGX | San Diego | 56 min |
| Sep 24, 1:24 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 51 min |
| Sep 24, 1:28 PM PDT | Flash Flood Warning | SGX | San Diego | 2 hr |
| Sep 24, 1:49 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 3 hr |
| Sep 24, 2:09 PM PDT | Flash Flood Warning | SGX | San Diego | 3 hr |
| Sep 24, 2:11 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 49 min |
| Sep 24, 2:18 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 3 hr |
| Sep 24, 2:41 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 64 min |
| Sep 24, 2:59 PM PDT | Special Weather Statement | SGX | San Diego | 61 min |
| Sep 24, 3:14 PM PDT | Special Marine Warning | SGX | 91 min | |
| Sep 24, 3:20 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 55 min |
| Sep 24, 3:30 PM PDT | Mesoscale Discussion | SPC | San Diego | 90 min |
| Sep 24, 3:47 PM PDT | Special Weather Statement | SGX | Orange | 58 min |
| Sep 24, 3:56 PM PDT | Special Marine Warning | SGX | 94 min | |
| Sep 24, 4:20 PM PDT | Special Marine Warning | LOX | 85 min | |
| Sep 24, 4:40 PM PDT | Special Marine Warning | SGX | 65 min | |
| Sep 24, 4:55 PM PDT | Special Marine Warning | LOX | 65 min | |
| Sep 24, 5:18 PM PDT | Special Marine Warning | SGX | 57 min | |
| Sep 25, 2:20 AM PDT | Small Craft Advisory | MTR | 8 days | |
| Sep 25, 5:00 AM PDT | Fire Weather Watch | MFR | Modoc | 9 hr |
| Sep 25, 2:12 PM PDT | Red Flag Warning | MFR | Modoc | 29 hr |
| Sep 25, 3:03 PM PDT | Small Craft Advisory | MTR | 11 hr | |
| Sep 26, 2:43 AM PDT | Small Craft Advisory | LOX | 54 hr | |
| Sep 26, 9:28 AM PDT | Red Flag Warning | REV | El Dorado, Lassen, Madera, Modoc, Mono, Nevada and 3 more | 42 hr |
| Sep 26, 12:36 PM PDT | Lake Wind Advisory | REV | Alpine, El Dorado, Nevada, Placer | 39 hr |
| Sep 26, 2:02 PM PDT | Small Craft Advisory | MTR | 12 hr | |
| Sep 26, 3:16 PM PDT | Small Craft Advisory | EKA | 66 hr | |
| Sep 26, 8:48 PM PDT | Gale Watch | LOX | 19 hr | |
| Sep 27, 12:08 AM PDT | Wind Advisory | HNX | Kern | 47 hr |
| Sep 27, 2:26 AM PDT | Small Craft Advisory | MTR | 4 days | |
| Sep 27, 3:01 AM PDT | Freeze Watch | MFR | Modoc, Siskiyou | 11 hr |
| Sep 27, 3:15 AM PDT | Frost Advisory | EKA | Lake, Mendocino, Trinity | 30 hr |
| Sep 27, 3:42 AM PDT | Wind Advisory | LOX | 47 hr | |
| Sep 27, 9:21 AM PDT | Small Craft Advisory | LOX | 6 hr | |
| Sep 27, 11:31 AM PDT | Beach Hazards Statement | MTR | Marin, Monterey, City and County of San Francisco, San Mateo, Santa Cruz, Sonoma | 35 hr |
| Sep 27, 2:20 PM PDT | Freeze Warning | MFR | Modoc, Siskiyou | 44 hr |
| Sep 27, 3:38 PM PDT | Gale Warning | LOX | 35 hr | |
| Sep 28, 2:40 AM PDT | Small Craft Advisory | MTR | 48 hr | |
| Sep 28, 2:48 AM PDT | Small Craft Advisory | LOX | 48 hr | |
| Sep 28, 2:50 AM PDT | Red Flag Warning | STO | 17 hr | |
| Sep 28, 3:43 AM PDT | Frost Advisory | MFR | Siskiyou | 30 hr |
| Sep 28, 1:04 PM PDT | Frost Advisory | EKA | Humboldt, Mendocino, Trinity | 20 hr |
| Sep 28, 2:26 PM PDT | Wind Advisory | LOX | 12 hr | |
| Sep 28, 5:50 PM PDT | Fire Weather Watch | MTR | 17 hr | |
| Sep 29, 10:27 AM PDT | Red Flag Warning | MTR | 22 hr | |
| Sep 29, 2:18 PM PDT | Gale Watch | EKA | 24 hr | |
| Sep 29, 2:18 PM PDT | Small Craft Advisory | EKA | 4 days | |
| Sep 29, 2:18 PM PDT | Hazardous Seas Watch | EKA | 24 hr | |
| Sep 30, 2:40 PM PDT | Gale Warning | EKA | 30 hr | |
| Sep 30, 2:40 PM PDT | Hazardous Seas Warning | EKA | 48 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 18 |
| Mesoscale Discussion | 2 |
| Special Weather Statement | 34 |
| Flooding | |
| Flash Flood Warning | 18 |
| Flash Flood Watch | 3 |
| Areal Flood Advisory | 12 |
| Heat | |
| Excessive Heat Warning | 8 |
| Excessive Heat Watch | 3 |
| Heat Advisory | 14 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Frost Advisory | 3 |
| Wind and dust | |
| Dust Storm Advisory | 1 |
| Lake Wind Advisory | 4 |
| Wind Advisory | 8 |
| Fire | |
| Red Flag Warning | 18 |
| Fire Weather Watch | 18 |
| Fog and smoke | |
| Dense Fog Advisory | 4 |
| Coast and beach | |
| High Surf Advisory | 1 |
| Beach Hazards Statement | 6 |
| Marine | |
| Gale Warning | 6 |
| Hazardous Seas Warning | 6 |
| Special Marine Warning | 6 |
| Gale Watch | 4 |
| Hazardous Seas Watch | 1 |
| Small Craft Advisory | 46 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Riverside County35
- San Bernardino County25
- San Diego County22
- Imperial County18
- Modoc County15
- Kern County10
- Los Angeles County9
- Siskiyou County9
- El Dorado County8
- Nevada County8
- Placer County8
- Lassen County7
- Orange County6
- Tulare County5
- Marin County4
- Sonoma County4
- Fresno County4
- Madera County4
- Plumas County4
- Sierra County4
- Alpine County4
- Napa County3
- Alameda County3
- Contra Costa County3
- Mono County3
- Inyo County2
- Monterey County2
- City and County of San Francisco2
- San Mateo County2
- Santa Cruz County2
- Lake County2
- Mendocino County2
- Trinity County2
- Santa Barbara County1
- Kings County1
- Mariposa County1
- Merced County1
- Humboldt County1
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.