Alert archive / California / Mendocino County
Weather alerts in Mendocino County, California, 2018
113 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Mendocino County and its neighbors
Each county as a circle sized by its count in 2018. Tap one for its archive.
- Alerts
- 113
- Warnings
- 27
- Watches
- 17
- Advisories
- 58
- Busiest month
- March23 alerts
- Busiest day
- April 6, 20185 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Mendocino County, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 0 | 0 | ||||
| Flash flood warnings | 1 | 1 | 0% | 1 | 100% | 9 min |
Each office's whole area, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Eureka, CA: tornado warnings | 0 | 1 | 0% | |||
| NWS Eureka, CA: flash flood warnings | 1 | 1 | 0% | 4 | 25% | 9 min |
An office's figures cover every county it serves, including across state lines.
Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.
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 11, 9:27 AM PST | Beach Hazards Statement | EKA | 18 hr |
| Jan 12, 3:48 AM PST | Beach Hazards Statement | EKA | 63 hr |
| Jan 16, 2:27 PM PST | High Surf Warning | EKA | 56 hr |
| Jan 18, 10:55 PM PST | High Surf Advisory | EKA | 12 hr |
| Jan 23, 1:35 AM PST | Tsunami Watch | AAQ | 3 hr |
| Jan 23, 2:19 PM PST | Winter Weather Advisory | EKA | 60 hr |
| Jan 24, 9:03 AM PST | Flood Watch | EKA | 7 hr |
| Jan 24, 10:21 AM PST | Areal Flood Warning | EKA | 3 hr |
| Jan 24, 10:52 AM PST | Areal Flood Advisory | EKA | 113 min |
| Feb 18, 3:59 AM PST | Hard Freeze Watch | EKA | 22 hr |
| Feb 18, 4:17 AM PST | High Surf Advisory | EKA | 32 hr |
| Feb 19, 2:19 AM PST | Hard Freeze Warning | EKA | 31 hr |
| Feb 21, 3:22 AM PST | Hard Freeze Watch | EKA | 34 hr |
| Feb 22, 1:49 PM PST | Hard Freeze Warning | EKA | 19 hr |
| Feb 27, 3:10 AM PST | Winter Storm Watch | EKA | 24 hr |
| Feb 27, 3:44 PM PST | Winter Storm Warning | EKA | 3 days |
| Mar 1, 2:53 AM PST | Winter Weather Advisory | EKA | 35 hr |
| Mar 1, 2:09 PM PST | Beach Hazards Statement | EKA | 32 hr |
| Mar 2, 9:12 PM PST | Winter Weather Advisory | EKA | 31 hr |
| Mar 4, 2:11 AM PST | Beach Hazards Statement | EKA | 38 hr |
| Mar 4, 2:17 PM PST | Frost Advisory | EKA | 19 hr |
| Mar 5, 1:18 AM PST | Freeze Warning | EKA | 8 hr |
| Mar 5, 2:26 PM PST | Frost Advisory | EKA | 19 hr |
| Mar 14, 4:19 AM PDT | Winter Weather Advisory | EKA | 56 hr |
| Mar 16, 3:38 AM PDT | Freeze Watch | EKA | 11 hr |
| Mar 16, 2:12 PM PDT | Frost Advisory | EKA | 19 hr |
| Mar 17, 2:10 PM PDT | Frost Advisory | EKA | 19 hr |
| Mar 17, 2:10 PM PDT | Freeze Warning | EKA | 19 hr |
| Mar 18, 2:03 PM PDT | Frost Advisory | EKA | 19 hr |
| Mar 18, 2:03 PM PDT | Freeze Warning | EKA | 19 hr |
| Mar 21, 2:37 PM PDT | Winter Storm Watch | EKA | 13 hr |
| Mar 22, 3:28 AM PDT | Winter Storm Warning | EKA | 29 hr |
| Mar 23, 3:40 AM PDT | Winter Storm Warning | EKA | 11 hr |
| Mar 23, 2:33 PM PDT | Winter Storm Watch | EKA | 13 hr |
| Mar 24, 3:57 AM PDT | Winter Storm Warning | EKA | 25 hr |
| Mar 24, 3:57 AM PDT | Winter Weather Advisory | EKA | 25 hr |
| Mar 25, 3:43 AM PDT | Frost Advisory | EKA | 29 hr |
| Mar 25, 3:43 AM PDT | Freeze Warning | EKA | 29 hr |
| Mar 27, 2:26 AM PDT | Frost Advisory | EKA | 7 hr |
| Apr 2, 2:05 PM PDT | Frost Advisory | EKA | 19 hr |
| Apr 5, 12:25 PM PDT | Flood Watch | EKA | 40 hr |
| Apr 6, 8:40 AM PDT | River Flood Warning | EKA | 36 hr |
| Apr 6, 8:56 AM PDT | River Flood Advisory | EKA | 36 hr |
| Apr 6, 11:01 AM PDT | Areal Flood Advisory | EKA | 3 hr |
| Apr 6, 2:01 PM PDT | Areal Flood Advisory | EKA | 2 hr |
| Apr 6, 4:09 PM PDT | Areal Flood Advisory | EKA | 14 hr |
| Apr 11, 3:21 PM PDT | Special Weather Statement | EKA | 39 min |
| Apr 12, 3:21 PM PDT | Frost Advisory | EKA | 17 hr |
| Apr 15, 2:11 PM PDT | Freeze Watch | EKA | 13 hr |
| Apr 16, 3:15 AM PDT | Frost Advisory | EKA | 31 hr |
| Apr 16, 3:15 AM PDT | Freeze Warning | EKA | 31 hr |
| Apr 18, 3:26 AM PDT | Frost Advisory | EKA | 30 hr |
| Apr 18, 3:26 AM PDT | Freeze Warning | EKA | 30 hr |
| Apr 24, 3:54 AM PDT | Beach Hazards Statement | EKA | 11 hr |
| Jun 22, 1:25 PM PDT | Heat Advisory | EKA | 32 hr |
| Jun 30, 2:14 AM PDT | Heat Advisory | EKA | 18 hr |
| Jul 1, 2:39 AM PDT | Heat Advisory | EKA | 17 hr |
| Jul 15, 4:01 AM PDT | Heat Advisory | EKA | 5 days |
| Jul 16, 3:56 AM PDT | Heat Advisory | EKA | 4 days |
| Jul 19, 3:18 PM PDT | Heat Advisory | EKA | 30 hr |
| Jul 24, 3:34 AM PDT | Heat Advisory | EKA | 67 hr |
| Jul 24, 10:09 AM PDT | Beach Hazards Statement | EKA | 31 hr |
| Jul 27, 3:23 AM PDT | Heat Advisory | EKA | 41 hr |
| Jul 29, 3:15 AM PDT | Heat Advisory | EKA | 17 hr |
| Sep 11, 2:06 PM PDT | Frost Advisory | EKA | 18 hr |
| Oct 3, 9:54 AM PDT | Flash Flood Watch | EKA | 9 hr |
| Oct 3, 1:01 PM PDT | Flash Flood Warning | EKA | 3 hr |
| Oct 14, 11:56 AM PDT | Wind Advisory | EKA | 17 hr |
| Oct 15, 9:11 AM PDT | Beach Hazards Statement | EKA | 62 hr |
| Oct 15, 2:38 PM PDT | Frost Advisory | EKA | 18 hr |
| Oct 16, 2:24 PM PDT | Frost Advisory | EKA | 19 hr |
| Oct 17, 2:09 PM PDT | Frost Advisory | EKA | 19 hr |
| Oct 18, 2:39 PM PDT | Frost Advisory | EKA | 18 hr |
| Oct 20, 2:50 PM PDT | Frost Advisory | EKA | 18 hr |
| Oct 29, 4:25 AM PDT | Freeze Watch | EKA | 10 hr |
| Oct 29, 2:29 PM PDT | Frost Advisory | EKA | 19 hr |
| Oct 29, 2:29 PM PDT | Freeze Warning | EKA | 19 hr |
| Oct 30, 2:40 PM PDT | Frost Advisory | EKA | 19 hr |
| Oct 30, 2:40 PM PDT | Freeze Warning | EKA | 19 hr |
| Nov 6, 3:42 AM PST | Frost Advisory | EKA | 12 hr |
| Nov 6, 3:17 PM PST | Frost Advisory | EKA | 18 hr |
| Nov 6, 3:17 PM PST | Freeze Warning | EKA | 18 hr |
| Nov 7, 3:53 AM PST | Frost Advisory | EKA | 29 hr |
| Nov 7, 3:53 AM PST | Freeze Warning | EKA | 29 hr |
| Nov 8, 2:12 PM PST | Frost Advisory | EKA | 7 hr |
| Nov 8, 2:12 PM PST | Freeze Warning | EKA | 19 hr |
| Nov 9, 12:52 PM PST | Frost Advisory | EKA | 20 hr |
| Nov 9, 7:52 PM PST | Freeze Warning | EKA | 13 hr |
| Nov 10, 3:18 PM PST | Freeze Warning | EKA | 18 hr |
| Nov 11, 9:17 PM PST | Freeze Warning | EKA | 12 hr |
| Nov 12, 3:01 PM PST | Frost Advisory | EKA | 18 hr |
| Nov 19, 1:03 PM PST | Flash Flood Watch | EKA | 4 days |
| Nov 19, 1:11 PM PST | Frost Advisory | EKA | 20 hr |
| Nov 20, 2:50 PM PST | Wind Advisory | EKA | 23 hr |
| Nov 21, 2:19 PM PST | High Wind Watch | EKA | 13 hr |
| Nov 25, 8:40 PM PST | Beach Hazards Statement | EKA | 24 hr |
| Nov 26, 9:00 PM PST | High Surf Advisory | EKA | 38 hr |
| Nov 27, 2:04 PM PST | Flash Flood Watch | EKA | 50 hr |
| Nov 27, 2:10 PM PST | Wind Advisory | EKA | 56 hr |
| Dec 2, 4:30 AM PST | Freeze Watch | EKA | 7 hr |
| Dec 2, 11:42 AM PST | Freeze Warning | EKA | 21 hr |
| Dec 4, 3:33 AM PST | Beach Hazards Statement | EKA | 4 days |
| Dec 14, 2:17 PM PST | High Surf Warning | EKA | 3 days |
| Dec 16, 3:34 PM PST | Areal Flood Advisory | EKA | 116 min |
| Dec 17, 8:57 PM PST | High Surf Advisory | EKA | 16 hr |
| Dec 19, 9:06 AM PST | High Surf Advisory | EKA | 18 hr |
| Dec 21, 7:44 PM PST | Frost Advisory | EKA | 12 hr |
| Dec 24, 2:08 AM PST | Flash Flood Watch | EKA | 16 hr |
| Dec 25, 2:52 AM PST | Frost Advisory | EKA | 30 hr |
| Dec 27, 11:28 AM PST | Frost Advisory | EKA | 22 hr |
| Dec 27, 10:45 PM PST | Freeze Warning | EKA | 10 hr |
| Dec 28, 3:17 AM PST | Beach Hazards Statement | EKA | 41 hr |
| Dec 28, 3:08 PM PST | Frost Advisory | EKA | 18 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 | |
| Special Weather Statement | 1 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 1 |
| River Flood Warning | 1 |
| Flash Flood Watch | 4 |
| Flood Watch | 2 |
| Areal Flood Advisory | 5 |
| River Flood Advisory | 1 |
| Winter | |
| Winter Storm Warning | 4 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 5 |
| Heat | |
| Heat Advisory | 9 |
| Cold | |
| Freeze Warning | 16 |
| Hard Freeze Warning | 2 |
| Freeze Watch | 4 |
| Hard Freeze Watch | 2 |
| Frost Advisory | 30 |
| Wind and dust | |
| High Wind Watch | 1 |
| Wind Advisory | 3 |
| Coast and beach | |
| High Surf Warning | 2 |
| Tsunami Watch | 1 |
| High Surf Advisory | 5 |
| Beach Hazards Statement | 10 |
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.