Alert archive / California / Alameda County / 2021
Weather alerts in Alameda County, California, December 2021
17 weather alerts in December 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
- Alerts
- 17
- Warnings
- 0
- Watches
- 1
- Advisories
- 16
- Busiest day
- December 25, 20215 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 | Lasted |
|---|---|---|---|
| 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 |
|---|---|
| Flooding | |
| Flood Watch | 1 |
| Areal Flood Advisory | 12 |
| Wind and dust | |
| Wind Advisory | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 1 |
| Coast and beach | |
| Coastal Flood Advisory | 1 |
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. Warning verification from the Mesonet's Cow. Rebuilt daily.