Alert archive / California / Contra Costa County
Weather alerts in Contra Costa County, California, 2018
20 weather alerts in 2018, 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 2018. Tap one for its archive.
- Alerts
- 20
- Warnings
- 3
- Watches
- 4
- Advisories
- 13
- Busiest month
- December8 alerts
- Busiest day
- February 18, 20182 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 7, 4:33 AM PST | Wind Advisory | MTR | 46 hr |
| Jan 23, 1:35 AM PST | Tsunami Watch | AAQ | 3 hr |
| Feb 17, 7:16 PM PST | Freeze Watch | MTR | 14 hr |
| Feb 18, 9:13 AM PST | Freeze Warning | MTR | 48 hr |
| Feb 18, 4:44 PM PST | Frost Advisory | MTR | 40 hr |
| Feb 28, 4:32 AM PST | Wind Advisory | MTR | 41 hr |
| Jun 21, 11:54 AM PDT | Heat Advisory | MTR | 56 hr |
| Oct 5, 12:01 PM PDT | Fire Weather Watch | MTR | 22 hr |
| Oct 6, 10:25 AM PDT | Red Flag Warning | MTR | 55 hr |
| Nov 27, 12:29 PM PST | High Wind Watch | MTR | 24 hr |
| Nov 28, 12:12 PM PST | Wind Advisory | MTR | 25 hr |
| Nov 28, 10:36 PM PST | Areal Flood Advisory | MTR | 54 min |
| Dec 2, 4:50 PM PST | Freeze Warning | MTR | 11 hr |
| Dec 8, 9:27 PM PST | Dense Fog Advisory | MTR | 14 hr |
| Dec 11, 2:25 AM PST | Dense Fog Advisory | MTR | 8 hr |
| Dec 20, 4:30 AM PST | Dense Fog Advisory | MTR | 6 hr |
| Dec 21, 10:33 AM PST | Coastal Flood Advisory | MTR | 25 hr |
| Dec 22, 1:09 PM PST | Coastal Flood Advisory | MTR | 24 hr |
| Dec 23, 1:42 PM PST | Coastal Flood Advisory | MTR | 24 hr |
| Dec 30, 1:52 AM PST | Wind Advisory | MTR | 56 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Flooding | |
| Areal Flood Advisory | 1 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 2 |
| Freeze Watch | 1 |
| Frost Advisory | 1 |
| Wind and dust | |
| High Wind Watch | 1 |
| Wind Advisory | 4 |
| Fire | |
| Red Flag Warning | 1 |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
| Coast and beach | |
| Tsunami Watch | 1 |
| Coastal Flood Advisory | 3 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20172019
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.