Alert archive / California / Alameda County
Weather alerts in Alameda County, California, 2021
51 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Alameda County and its neighbors
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Alerts
- 51
- Warnings
- 7
- Watches
- 4
- Advisories
- 39
- Busiest month
- December17 alerts
- Busiest day
- December 25, 20215 alerts
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.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 5, 4:02 AM PST | Dense Fog Advisory | MTR | 7 hr |
| Jan 16, 2:29 AM PST | Wind Advisory | MTR | 4 days |
| Jan 25, 2:55 AM PST | High Wind Watch | MTR | 12 hr |
| Jan 25, 2:42 PM PST | Freeze Warning | MTR | 17 hr |
| Jan 25, 2:42 PM PST | Wind Advisory | MTR | 61 hr |
| Jan 26, 11:18 PM PST | Areal Flood Advisory | MTR | 4 hr |
| Jan 27, 2:11 PM PST | Areal Flood Advisory | MTR | 5 hr |
| Feb 23, 2:36 AM PST | Wind Advisory | MTR | 49 hr |
| Mar 10, 11:36 AM PST | Special Weather Statement | MTR | 39 min |
| Mar 14, 1:04 PM PDT | Wind Advisory | MTR | 25 hr |
| May 7, 9:54 AM PDT | Red Flag Warning | MTR | 4 days |
| May 18, 4:47 AM PDT | Wind Advisory | MTR | 48 hr |
| May 28, 12:41 PM PDT | Heat Advisory | MTR | 3 days |
| Jun 6, 1:48 PM PDT | Wind Advisory | MTR | 30 hr |
| Jun 14, 1:17 PM PDT | Excessive Heat Warning | MTR | 4 days |
| Jun 14, 1:17 PM PDT | Heat Advisory | MTR | 4 days |
| Jun 18, 9:06 PM PDT | Heat Advisory | MTR | 23 hr |
| Jul 8, 3:33 AM PDT | Excessive Heat Warning | MTR | 4 days |
| Sep 8, 11:04 AM PDT | Fire Weather Watch | MTR | 22 hr |
| Sep 9, 9:30 AM PDT | Red Flag Warning | MTR | 23 hr |
| Sep 19, 9:46 AM PDT | Red Flag Warning | MTR | 34 hr |
| Oct 7, 2:21 PM PDT | Fire Weather Watch | MTR | 61 hr |
| Oct 9, 1:50 PM PDT | Wind Advisory | MTR | 54 hr |
| Oct 10, 3:03 AM PDT | Red Flag Warning | MTR | 62 hr |
| Oct 19, 1:39 PM PDT | Wind Advisory | MTR | 14 hr |
| Oct 22, 1:38 PM PDT | Wind Advisory | MTR | 57 hr |
| Oct 24, 4:15 PM PDT | Areal Flood Advisory | MTR | 10 hr |
| Nov 7, 1:24 PM PST | Wind Advisory | MTR | 38 hr |
| Nov 12, 7:37 AM PST | Dense Fog Advisory | MTR | 2 hr |
| Nov 12, 11:02 PM PST | Dense Fog Advisory | MTR | 13 hr |
| Nov 13, 9:35 PM PST | Dense Fog Advisory | MTR | 13 hr |
| Nov 15, 11:53 PM PST | Dense Fog Advisory | MTR | 11 hr |
| Nov 23, 1:46 PM PST | Frost Advisory | MTR | 19 hr |
| Nov 24, 2:49 PM PST | Frost Advisory | MTR | 18 hr |
| Dec 2, 12:37 PM PST | Coastal Flood Advisory | MTR | 3 days |
| Dec 6, 12:18 AM PST | Dense Fog Advisory | MTR | 10 hr |
| Dec 11, 12:58 PM PST | Wind Advisory | MTR | 51 hr |
| Dec 13, 5:31 AM PST | Areal Flood Advisory | MTR | 7 hr |
| Dec 13, 12:00 PM PST | Flood Watch | MTR | 13 hr |
| Dec 15, 7:14 PM PST | Wind Advisory | MTR | 8 hr |
| Dec 15, 10:43 PM PST | Areal Flood Advisory | MTR | 2 hr |
| Dec 23, 8:12 AM PST | Areal Flood Advisory | MTR | 2 hr |
| Dec 25, 8:41 AM PST | Areal Flood Advisory | MTR | 4 hr |
| Dec 25, 10:41 AM PST | Areal Flood Advisory | MTR | 2 hr |
| Dec 25, 10:44 AM PST | Areal Flood Advisory | MTR | 2 hr |
| Dec 25, 11:30 AM PST | Areal Flood Advisory | MTR | 3 hr |
| Dec 25, 12:15 PM PST | Areal Flood Advisory | MTR | 2 hr |
| Dec 27, 6:02 AM PST | Areal Flood Advisory | MTR | 3 hr |
| Dec 27, 6:35 AM PST | Areal Flood Advisory | MTR | 4 hr |
| Dec 29, 5:34 PM PST | Areal Flood Advisory | MTR | 56 min |
| Dec 29, 6:31 PM PST | Areal Flood Advisory | MTR | 89 min |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Special Weather Statement | 1 |
| Flooding | |
| Flood Watch | 1 |
| Areal Flood Advisory | 15 |
| Heat | |
| Excessive Heat Warning | 2 |
| Heat Advisory | 3 |
| Cold | |
| Freeze Warning | 1 |
| Frost Advisory | 2 |
| Wind and dust | |
| High Wind Watch | 1 |
| Wind Advisory | 12 |
| Fire | |
| Red Flag Warning | 4 |
| Fire Weather Watch | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 6 |
| Coast and beach | |
| Coastal Flood Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe 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.