Alert archive / California / Marin County
Weather alerts in Marin County, California, 2016
95 weather alerts in 2016, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Marin County and its neighbors
Each county as a circle sized by its count in 2016. Tap one for its archive.
- Alerts
- 95
- Warnings
- 12
- Watches
- 8
- Advisories
- 52
- Busiest month
- December20 alerts
- Busiest day
- December 16, 20166 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Marin County, 2016
| 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 | 3 | 2 | 33% | 3 | 0% |
Each office's whole area, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS San Francisco Bay Area, CA: tornado warnings | 0 | 2 | 0% | |||
| NWS San Francisco Bay Area, CA: severe thunderstorm warnings | 2 | 0 | 100% | 1 | 0% | |
| NWS San Francisco Bay Area, CA: flash flood warnings | 23 | 3 | 87% | 93 | 17% | 121 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 1, 2:52 PM PST | Freeze Warning | MTR | 11 hr |
| Jan 4, 7:10 PM PST | High Surf Advisory | MTR | 31 hr |
| Jan 5, 1:57 PM PST | Coastal Flood Advisory | MTR | 20 hr |
| Jan 5, 2:04 PM PST | Flash Flood Watch | MTR | 28 hr |
| Jan 6, 2:35 AM PST | High Surf Warning | MTR | 35 hr |
| Jan 6, 1:49 PM PST | Coastal Flood Advisory | MTR | 20 hr |
| Jan 7, 1:54 PM PST | High Surf Advisory | MTR | 19 hr |
| Jan 10, 8:09 PM PST | High Surf Advisory | MTR | 31 hr |
| Jan 15, 12:54 PM PST | High Surf Warning | MTR | 63 hr |
| Jan 16, 1:47 PM PST | Flash Flood Watch | MTR | 37 hr |
| Jan 16, 7:40 PM PST | Coastal Flood Warning | MTR | 35 hr |
| Jan 17, 7:00 PM PST | Areal Flood Advisory | MTR | 3 hr |
| Jan 19, 4:23 AM PST | Areal Flood Advisory | MTR | 5 hr |
| Jan 21, 5:23 AM PST | High Surf Advisory | MTR | 65 hr |
| Jan 21, 8:29 AM PST | Coastal Flood Advisory | MTR | 29 hr |
| Jan 22, 1:01 PM PST | Coastal Flood Advisory | MTR | 24 hr |
| Jan 27, 2:09 PM PST | High Surf Advisory | MTR | 62 hr |
| Jan 31, 2:31 AM PST | Wind Advisory | MTR | 25 hr |
| Feb 2, 8:44 PM PST | High Surf Advisory | MTR | 54 hr |
| Feb 5, 2:23 AM PST | Beach Hazards Statement | MTR | 61 hr |
| Feb 7, 8:44 PM PST | Beach Hazards Statement | MTR | 23 hr |
| Feb 9, 8:29 AM PST | Beach Hazards Statement | MTR | 12 hr |
| Feb 10, 1:24 PM PST | High Surf Advisory | MTR | 3 days |
| Feb 13, 4:31 AM PST | Dense Fog Advisory | MTR | 4 hr |
| Feb 18, 12:10 AM PST | High Surf Advisory | MTR | 32 hr |
| Feb 23, 2:04 PM PST | High Surf Advisory | MTR | 37 hr |
| Feb 25, 12:33 PM PST | High Surf Advisory | MTR | 50 hr |
| Mar 4, 3:14 AM PST | Wind Advisory | MTR | 46 hr |
| Mar 5, 3:34 AM PST | High Surf Advisory | MTR | 3 days |
| Mar 5, 7:28 AM PST | Flash Flood Watch | MTR | 15 hr |
| Mar 5, 4:17 PM PST | Areal Flood Advisory | MTR | 6 hr |
| Mar 5, 10:14 PM PST | Flash Flood Watch | MTR | 5 hr |
| Mar 6, 4:57 AM PST | Wind Advisory | MTR | 23 hr |
| Mar 6, 5:16 AM PST | Flash Flood Watch | MTR | 23 hr |
| Mar 9, 3:18 PM PST | Flash Flood Watch | MTR | 4 days |
| Mar 10, 8:35 AM PST | Areal Flood Advisory | MTR | 3 hr |
| Mar 10, 10:05 AM PST | Areal Flood Advisory | MTR | 115 min |
| Mar 10, 11:43 AM PST | Areal Flood Advisory | MTR | 3 hr |
| Mar 10, 4:56 PM PST | Areal Flood Advisory | MTR | 4 hr |
| Mar 11, 3:28 AM PST | Wind Advisory | MTR | 18 hr |
| Mar 12, 1:42 PM PST | High Surf Advisory | MTR | 54 hr |
| Mar 20, 11:08 PM PDT | High Surf Advisory | MTR | 52 hr |
| Mar 31, 12:40 PM PDT | Beach Hazards Statement | MTR | 3 days |
| Apr 13, 12:42 PM PDT | High Surf Advisory | MTR | 46 hr |
| Apr 15, 9:13 AM PDT | Beach Hazards Statement | MTR | 12 hr |
| Apr 16, 10:16 PM PDT | Beach Hazards Statement | MTR | 23 hr |
| Apr 20, 3:12 AM PDT | Beach Hazards Statement | MTR | 44 hr |
| Apr 23, 3:05 AM PDT | Beach Hazards Statement | MTR | 17 hr |
| Apr 24, 2:25 AM PDT | Wind Advisory | MTR | 22 hr |
| Apr 30, 12:10 PM PDT | Beach Hazards Statement | MTR | 9 hr |
| May 31, 1:33 AM PDT | Beach Hazards Statement | MTR | 67 hr |
| Jun 22, 7:29 PM PDT | Beach Hazards Statement | MTR | 3 days |
| Jul 1, 7:29 PM PDT | Beach Hazards Statement | MTR | 10 hr |
| Jul 2, 5:39 AM PDT | Beach Hazards Statement | MTR | 62 hr |
| Sep 17, 2:00 PM PDT | Beach Hazards Statement | MTR | 39 hr |
| Sep 23, 10:21 AM PDT | Heat Advisory | MTR | 58 hr |
| Sep 23, 10:21 AM PDT | Heat Advisory | MTR | 3 days |
| Oct 7, 11:47 AM PDT | Beach Hazards Statement | MTR | 3 days |
| Oct 12, 2:08 AM PDT | Coastal Flood Advisory | MTR | 67 hr |
| Oct 12, 2:08 AM PDT | High Surf Advisory | MTR | 67 hr |
| Oct 14, 2:03 PM PDT | Wind Advisory | MTR | 31 hr |
| Oct 14, 10:27 PM PDT | Coastal Flood Advisory | MTR | 65 hr |
| Oct 15, 3:10 AM PDT | Beach Hazards Statement | MTR | 24 hr |
| Nov 2, 2:48 AM PDT | High Surf Advisory | MTR | 60 hr |
| Nov 4, 8:34 PM PDT | High Surf Advisory | MTR | 37 hr |
| Nov 6, 8:59 AM PST | Beach Hazards Statement | MTR | 5 hr |
| Nov 7, 1:33 PM PST | High Surf Advisory | MTR | 65 hr |
| Nov 13, 11:04 PM PST | Dense Fog Advisory | MTR | 11 hr |
| Nov 16, 3:32 PM PST | Frost Advisory | MTR | 16 hr |
| Nov 17, 1:24 PM PST | Frost Advisory | MTR | 19 hr |
| Nov 18, 11:22 AM PST | Wind Advisory | MTR | 27 hr |
| Nov 18, 8:44 PM PST | High Surf Advisory | MTR | 42 hr |
| Nov 23, 3:54 AM PST | Beach Hazards Statement | MTR | 4 days |
| Nov 27, 10:51 PM PST | Beach Hazards Statement | MTR | 14 hr |
| Nov 28, 12:59 PM PST | High Surf Advisory | MTR | 29 hr |
| Dec 3, 6:24 AM PST | Beach Hazards Statement | MTR | 12 hr |
| Dec 12, 7:06 PM PST | Coastal Flood Statement | MTR | 65 hr |
| Dec 13, 10:00 AM PST | Flash Flood Watch | MTR | 60 hr |
| Dec 14, 4:19 AM PST | High Wind Watch | MTR | 23 hr |
| Dec 14, 6:07 PM PST | Areal Flood Advisory | MTR | 12 hr |
| Dec 15, 3:40 AM PST | Wind Advisory | MTR | 21 hr |
| Dec 15, 10:24 AM PST | Areal Flood Advisory | MTR | 6 hr |
| Dec 15, 12:57 PM PST | Flash Flood Warning | MTR | 4 hr |
| Dec 15, 4:13 PM PST | Flash Flood Warning | MTR | 3 hr |
| Dec 15, 4:16 PM PST | Areal Flood Advisory | MTR | 3 hr |
| Dec 15, 5:08 PM PST | Flash Flood Warning | MTR | 3 hr |
| Dec 16, 7:14 AM PST | Frost Advisory | MTR | 49 hr |
| Dec 16, 7:14 AM PST | Freeze Warning | MTR | 25 hr |
| Dec 16, 7:14 AM PST | Freeze Warning | MTR | 49 hr |
| Dec 18, 12:14 PM PST | Freeze Warning | MTR | 20 hr |
| Dec 18, 7:15 PM PST | Frost Advisory | MTR | 13 hr |
| Dec 19, 10:01 AM PST | Beach Hazards Statement | MTR | 8 hr |
| Dec 20, 1:19 PM PST | Beach Hazards Statement | MTR | 29 hr |
| Dec 24, 12:10 PM PST | Freeze Warning | MTR | 20 hr |
| Dec 26, 10:56 PM PST | Freeze Warning | MTR | 10 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Flooding | |
| Flash Flood Warning | 3 |
| Flash Flood Watch | 7 |
| Areal Flood Advisory | 10 |
| Heat | |
| Heat Advisory | 2 |
| Cold | |
| Freeze Warning | 6 |
| Frost Advisory | 4 |
| Wind and dust | |
| High Wind Watch | 1 |
| Wind Advisory | 8 |
| Fog and smoke | |
| Dense Fog Advisory | 2 |
| Coast and beach | |
| Coastal Flood Warning | 1 |
| High Surf Warning | 2 |
| Coastal Flood Advisory | 6 |
| High Surf Advisory | 20 |
| Beach Hazards Statement | 22 |
| Coastal Flood Statement | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20152017
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.