Alert archive / California / Orange County
Weather alerts in Orange County, California, 2008
71 weather alerts in 2008, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Orange County and its neighbors
Each county as a circle sized by its count in 2008. Tap one for its archive.
- Alerts
- 71
- Warnings
- 22
- Watches
- 17
- Advisories
- 31
- Busiest month
- December19 alerts
- Busiest day
- December 15, 20085 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Orange County, 2008
| 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 | 9 | 3 | 67% | 4 | 75% | 15 min |
Each office's whole area, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS San Diego, CA: tornado warnings | 6 | 0 | 100% | 4 | 0% | |
| NWS San Diego, CA: severe thunderstorm warnings | 12 | 2 | 83% | 6 | 50% | 29 min |
| NWS San Diego, CA: flash flood warnings | 56 | 16 | 71% | 48 | 71% | 103 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, 12:49 AM PST | High Wind Warning | SGX | 9 hr |
| Jan 3, 1:32 PM PST | Flash Flood Watch | SGX | 52 hr |
| Jan 4, 1:20 PM PST | Wind Advisory | SGX | 67 hr |
| Jan 5, 1:25 AM PST | Flash Flood Warning | SGX | 3 hr |
| Jan 5, 4:37 AM PST | Flash Flood Warning | SGX | 4 hr |
| Jan 5, 5:18 AM PST | Dense Fog Advisory | SGX | 51 hr |
| Jan 6, 3:55 AM PST | Flash Flood Watch | SGX | 28 hr |
| Jan 13, 3:45 AM PST | High Wind Watch | SGX | 7 hr |
| Jan 13, 3:45 AM PST | Wind Advisory | SGX | 38 hr |
| Jan 13, 10:21 AM PST | High Wind Warning | SGX | 26 hr |
| Jan 14, 7:45 PM PST | High Wind Watch | SGX | 17 hr |
| Jan 15, 1:09 PM PST | High Wind Warning | SGX | 47 hr |
| Jan 15, 1:09 PM PST | Wind Advisory | SGX | 3 days |
| Jan 25, 1:32 PM PST | Flash Flood Watch | SGX | 67 hr |
| Jan 26, 1:02 PM PST | Wind Advisory | SGX | 33 hr |
| Feb 3, 2:38 AM PST | Wind Advisory | SGX | 14 hr |
| Feb 5, 3:20 AM PST | Wind Advisory | SGX | 6 hr |
| Feb 13, 4:26 AM PST | High Wind Watch | SGX | 13 hr |
| Feb 13, 5:02 PM PST | High Wind Warning | SGX | 10 hr |
| Feb 14, 1:02 PM PST | High Wind Warning | SGX | 23 hr |
| Feb 23, 3:27 AM PST | Flash Flood Watch | SGX | 30 hr |
| Feb 26, 2:16 AM PST | Wind Advisory | SGX | 10 hr |
| Mar 1, 12:06 PM PST | High Wind Watch | SGX | 21 hr |
| Mar 2, 3:28 AM PST | High Wind Warning | SGX | 34 hr |
| Mar 5, 3:45 AM PST | Wind Advisory | SGX | 24 hr |
| Mar 8, 1:33 PM PST | Wind Advisory | SGX | 22 hr |
| Mar 14, 1:59 PM PDT | Wind Advisory | SGX | 30 hr |
| Mar 16, 8:43 PM PDT | Wind Advisory | SGX | 16 hr |
| Apr 11, 1:33 PM PDT | Wind Advisory | SGX | 24 hr |
| Apr 30, 5:56 AM PDT | Dense Fog Advisory | SGX | 4 hr |
| May 6, 10:38 PM PDT | Dense Fog Advisory | SGX | 10 hr |
| May 22, 12:01 PM PDT | Flash Flood Warning | SGX | 59 min |
| May 22, 12:55 PM PDT | Flash Flood Warning | SGX | 2 hr |
| May 22, 6:10 PM PDT | Flash Flood Warning | SGX | 104 min |
| May 22, 6:18 PM PDT | Flash Flood Warning | SGX | 87 min |
| May 23, 1:53 PM PDT | Dense Fog Advisory | SGX | 19 hr |
| Oct 11, 9:02 AM PDT | Fire Weather Watch | SGX | 19 hr |
| Oct 12, 2:56 AM PDT | High Wind Warning | SGX | 57 hr |
| Oct 12, 2:56 AM PDT | Wind Advisory | SGX | 57 hr |
| Oct 12, 3:45 AM PDT | Red Flag Warning | SGX | 6 days |
| Oct 14, 11:57 AM PDT | Wind Advisory | SGX | 7 hr |
| Oct 21, 8:48 AM PDT | Red Flag Warning | SGX | 8 days |
| Oct 21, 9:07 PM PDT | Wind Advisory | SGX | 20 hr |
| Nov 11, 12:54 PM PST | Fire Weather Watch | SGX | 48 hr |
| Nov 13, 12:55 PM PST | Red Flag Warning | SGX | 3 days |
| Nov 13, 1:17 PM PST | High Wind Watch | SGX | 14 hr |
| Nov 13, 1:17 PM PST | Wind Advisory | SGX | 49 hr |
| Nov 14, 5:45 AM PST | High Wind Warning | SGX | 32 hr |
| Nov 24, 1:00 PM PST | Flash Flood Watch | SGX | 3 days |
| Nov 25, 10:00 PM PST | Mesoscale Discussion | SPC | 2 hr |
| Nov 26, 12:40 AM PST | Flash Flood Warning | SGX | 5 hr |
| Nov 26, 12:55 AM PST | Areal Flood Advisory | SGX | 5 hr |
| Dec 1, 6:13 PM PST | Dense Fog Advisory | SGX | 15 hr |
| Dec 4, 1:55 AM PST | Dense Fog Advisory | SGX | 5 hr |
| Dec 5, 6:44 AM PST | Wind Advisory | SGX | 7 hr |
| Dec 8, 1:19 PM PST | High Wind Watch | SGX | 7 hr |
| Dec 8, 1:39 PM PST | Wind Advisory | SGX | 32 hr |
| Dec 8, 8:32 PM PST | High Wind Warning | SGX | 21 hr |
| Dec 10, 7:15 AM PST | Wind Advisory | SGX | 6 hr |
| Dec 14, 5:33 AM PST | Flash Flood Watch | SGX | 36 hr |
| Dec 15, 6:42 AM PST | Flash Flood Warning | SGX | 6 hr |
| Dec 15, 7:11 AM PST | Areal Flood Advisory | SGX | 5 hr |
| Dec 15, 10:14 AM PST | Flash Flood Warning | SGX | 3 hr |
| Dec 15, 10:30 AM PST | Areal Flood Advisory | SGX | 3 hr |
| Dec 15, 1:47 PM PST | Areal Flood Advisory | SGX | 88 min |
| Dec 15, 6:16 PM PST | Flash Flood Watch | SGX | 6 hr |
| Dec 16, 9:14 AM PST | Flash Flood Watch | SGX | 35 hr |
| Dec 17, 8:39 AM PST | Wind Advisory | SGX | 10 hr |
| Dec 17, 12:35 PM PST | High Wind Warning | SGX | 6 hr |
| Dec 23, 4:48 AM PST | Flash Flood Watch | SGX | 43 hr |
| Dec 25, 4:32 PM PST | Areal Flood Advisory | SGX | 98 min |
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 | |
| Flash Flood Warning | 9 |
| Flash Flood Watch | 9 |
| Areal Flood Advisory | 5 |
| Wind and dust | |
| High Wind Warning | 10 |
| High Wind Watch | 6 |
| Wind Advisory | 20 |
| Fire | |
| Red Flag Warning | 3 |
| Fire Weather Watch | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 6 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20072009
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.