Alert archive / California / Monterey County
Weather alerts in Monterey County, California, 2012
68 weather alerts in 2012, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Monterey County and its neighbors
Each county as a circle sized by its count in 2012. Tap one for its archive.
- Alerts
- 68
- Warnings
- 12
- Watches
- 5
- Advisories
- 35
- Busiest month
- November13 alerts
- Busiest day
- November 30, 20125 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Monterey County, 2012
| 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 | 3 | 0% | 3 | 67% | 69 min |
Each office's whole area, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS San Francisco Bay Area, CA: severe thunderstorm warnings | 3 | 0 | 100% | 1 | 0% | |
| NWS San Francisco Bay Area, CA: flash flood warnings | 17 | 3 | 82% | 10 | 20% | 69 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 5, 2:40 AM PST | High Surf Advisory | MTR | 39 hr |
| Jan 15, 8:08 PM PST | Freeze Watch | MTR | 7 hr |
| Jan 16, 3:19 AM PST | Freeze Watch | MTR | 24 hr |
| Jan 16, 3:19 AM PST | Freeze Warning | MTR | 29 hr |
| Jan 17, 3:22 AM PST | Freeze Warning | MTR | 30 hr |
| Jan 20, 10:14 AM PST | High Surf Advisory | MTR | 48 hr |
| Jan 22, 2:33 AM PST | Wind Advisory | MTR | 27 hr |
| Jan 26, 5:04 AM PST | High Surf Advisory | MTR | 10 hr |
| Jan 26, 3:16 PM PST | High Surf Advisory | MTR | 3 hr |
| Feb 5, 1:55 PM PST | High Wind Watch | MTR | 13 hr |
| Feb 6, 2:53 AM PST | Wind Advisory | MTR | 31 hr |
| Feb 7, 1:52 PM PST | High Surf Advisory | MTR | 25 hr |
| Feb 13, 9:13 AM PST | High Surf Advisory | MTR | 30 hr |
| Feb 29, 4:54 AM PST | High Surf Advisory | MTR | 28 hr |
| Mar 5, 2:35 AM PST | Wind Advisory | MTR | 44 hr |
| Mar 6, 2:14 PM PST | Freeze Warning | MTR | 15 hr |
| Mar 7, 5:00 PM PST | Freeze Warning | MTR | 15 hr |
| Mar 16, 8:50 PM PDT | Areal Flood Advisory | MTR | 115 min |
| Mar 16, 11:03 PM PDT | Areal Flood Advisory | MTR | 87 min |
| Mar 17, 2:58 AM PDT | High Surf Advisory | MTR | 41 hr |
| Mar 30, 3:01 AM PDT | High Surf Advisory | MTR | 35 hr |
| Mar 31, 2:30 PM PDT | High Surf Warning | MTR | 25 hr |
| Apr 1, 3:06 PM PDT | High Surf Advisory | MTR | 17 hr |
| Apr 4, 3:20 AM PDT | Frost Advisory | MTR | 24 hr |
| Apr 5, 8:17 PM PDT | Frost Advisory | MTR | 12 hr |
| May 16, 11:20 AM PDT | Beach Hazards Statement | MTR | 5 days |
| May 21, 11:27 AM PDT | Beach Hazards Statement | MTR | 48 hr |
| May 23, 11:55 AM PDT | Beach Hazards Statement | MTR | 6 days |
| May 29, 11:31 AM PDT | Beach Hazards Statement | MTR | 17 days |
| Jun 15, 2:24 PM PDT | Beach Hazards Statement | MTR | 3 days |
| Jun 19, 11:09 AM PDT | Beach Hazards Statement | MTR | 14 days |
| Aug 4, 11:08 AM PDT | Red Flag Warning | MTR | 7 hr |
| Aug 29, 6:04 PM PDT | Beach Hazards Statement | MTR | 3 days |
| Sep 3, 3:02 AM PDT | Dense Fog Advisory | MTR | 6 hr |
| Sep 6, 2:55 PM PDT | Beach Hazards Statement | MTR | 3 days |
| Sep 21, 2:04 PM PDT | Beach Hazards Statement | MTR | 4 days |
| Sep 23, 7:09 AM PDT | Dense Fog Advisory | MTR | 3 hr |
| Sep 25, 3:29 PM PDT | Beach Hazards Statement | MTR | 6 hr |
| Sep 28, 10:57 AM PDT | Excessive Heat Watch | MTR | 40 hr |
| Sep 28, 2:23 PM PDT | Beach Hazards Statement | MTR | 63 hr |
| Oct 12, 2:52 AM PDT | Beach Hazards Statement | MTR | 14 hr |
| Oct 12, 6:05 PM PDT | Beach Hazards Statement | MTR | 14 hr |
| Oct 15, 9:40 PM PDT | Beach Hazards Statement | MTR | 32 hr |
| Oct 29, 3:16 AM PDT | Dense Fog Advisory | MTR | 5 hr |
| Oct 29, 8:49 AM PDT | Beach Hazards Statement | MTR | 14 hr |
| Oct 29, 1:20 PM PDT | Dense Fog Advisory | MTR | 20 hr |
| Nov 5, 9:30 AM PST | Coastal Flood Warning | MTR | 10 min |
| Nov 5, 9:40 AM PST | Beach Hazards Statement | MTR | 30 hr |
| Nov 9, 6:42 PM PST | Frost Advisory | MTR | 13 hr |
| Nov 10, 10:13 AM PST | Frost Advisory | MTR | 22 hr |
| Nov 27, 3:39 AM PST | Wind Advisory | MTR | 34 hr |
| Nov 29, 3:14 AM PST | High Surf Advisory | MTR | 54 hr |
| Nov 29, 11:22 AM PST | Flash Flood Watch | MTR | 3 days |
| Nov 29, 11:23 AM PST | Wind Advisory | MTR | 27 hr |
| Nov 30, 8:27 AM PST | Areal Flood Advisory | MTR | 3 hr |
| Nov 30, 9:29 AM PST | Flash Flood Warning | MTR | 61 min |
| Nov 30, 10:38 AM PST | Flash Flood Warning | MTR | 82 min |
| Nov 30, 11:25 AM PST | Areal Flood Advisory | MTR | 3 hr |
| Nov 30, 11:59 AM PST | Flash Flood Warning | MTR | 3 hr |
| Dec 2, 9:20 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 18, 3:04 AM PST | Freeze Warning | MTR | 29 hr |
| Dec 19, 2:09 PM PST | Freeze Warning | MTR | 19 hr |
| Dec 21, 2:51 AM PST | High Surf Advisory | MTR | 35 hr |
| Dec 22, 1:41 PM PST | Wind Advisory | MTR | 24 hr |
| Dec 23, 8:11 PM PST | Areal Flood Advisory | MTR | 94 min |
| Dec 27, 12:39 PM PST | High Surf Advisory | MTR | 57 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 | 1 |
| Areal Flood Advisory | 6 |
| Heat | |
| Excessive Heat Watch | 1 |
| Cold | |
| Freeze Warning | 6 |
| Freeze Watch | 2 |
| Frost Advisory | 6 |
| Wind and dust | |
| High Wind Watch | 1 |
| Wind Advisory | 6 |
| Fire | |
| Red Flag Warning | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 4 |
| Coast and beach | |
| Coastal Flood Warning | 1 |
| High Surf Warning | 1 |
| High Surf Advisory | 13 |
| Beach Hazards Statement | 16 |
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.