Alert archive / California / Contra Costa County
Weather alerts in Contra Costa County, California, 2012
21 weather alerts in 2012, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Contra Costa County and its neighbors
Each county as a circle sized by its count in 2012. Tap one for its archive.
- Alerts
- 21
- Warnings
- 2
- Watches
- 2
- Advisories
- 16
- Busiest month
- December6 alerts
- Busiest day
- January 16, 20122 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 3, 6:03 AM PST | Dense Fog Advisory | MTR | 4 hr |
| Jan 15, 8:08 PM PST | Freeze Watch | MTR | 7 hr |
| Jan 16, 3:19 AM PST | Freeze Warning | MTR | 29 hr |
| Feb 8, 5:06 AM PST | Dense Fog Advisory | MTR | 4 hr |
| Mar 5, 2:35 AM PST | Wind Advisory | MTR | 44 hr |
| Mar 16, 8:50 PM PDT | Areal Flood Advisory | MTR | 115 min |
| Apr 12, 4:16 AM PDT | Areal Flood Advisory | MTR | 89 min |
| Apr 13, 10:53 AM PDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 5, 10:46 AM PDT | Red Flag Warning | MTR | 16 hr |
| Sep 28, 10:57 AM PDT | Excessive Heat Watch | MTR | 40 hr |
| Oct 29, 3:16 AM PDT | Dense Fog Advisory | MTR | 5 hr |
| Nov 26, 3:52 AM PST | Dense Fog Advisory | MTR | 5 hr |
| Nov 27, 3:39 AM PST | Wind Advisory | MTR | 34 hr |
| Nov 30, 8:27 AM PST | Areal Flood Advisory | MTR | 3 hr |
| Nov 30, 11:25 AM PST | Areal Flood Advisory | MTR | 3 hr |
| Dec 1, 10:23 AM PST | Wind Advisory | MTR | 26 hr |
| Dec 2, 7:19 AM PST | Areal Flood Advisory | MTR | 3 hr |
| Dec 13, 2:10 PM PST | Frost Advisory | MTR | 18 hr |
| Dec 18, 3:04 AM PST | Frost Advisory | MTR | 29 hr |
| Dec 19, 6:09 PM PST | Wind Advisory | MTR | 40 hr |
| Dec 22, 1:41 PM PST | Wind Advisory | MTR | 24 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 | |
| Mesoscale Discussion | 1 |
| Flooding | |
| Areal Flood Advisory | 5 |
| Heat | |
| Excessive Heat Watch | 1 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Frost Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 5 |
| Fire | |
| Red Flag Warning | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 4 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20112013
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.