Alert archive / California / Orange County
Weather alerts in Orange County, California, 2019
122 weather alerts in 2019, 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 2019. Tap one for its archive.
- Alerts
- 122
- Warnings
- 18
- Watches
- 16
- Advisories
- 59
- Busiest month
- January28 alerts
- Busiest day
- February 14, 20196 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 1 tornado warnings covering Orange County in 2019 had a tornado report inside them.
Orange County, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 0 | 0 | ||||
| Flash flood warnings | 6 | 3 | 50% | 13 | 54% | 38 min |
Each office's whole area, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS San Diego, CA: tornado warnings | 1 | 0 | 100% | 0 | ||
| NWS San Diego, CA: severe thunderstorm warnings | 16 | 5 | 69% | 18 | 67% | 16 min |
| NWS San Diego, CA: flash flood warnings | 36 | 16 | 56% | 84 | 48% | 97 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 2, 2:41 AM PST | Wind Advisory | SGX | 11 hr |
| Jan 3, 2:44 AM PST | Beach Hazards Statement | SGX | 34 hr |
| Jan 4, 1:11 PM PST | High Surf Advisory | SGX | 61 hr |
| Jan 5, 9:51 PM PST | Areal Flood Advisory | SGX | 100 min |
| Jan 7, 1:31 PM PST | High Surf Advisory | SGX | 3 days |
| Jan 10, 6:57 PM PST | Beach Hazards Statement | SGX | 19 hr |
| Jan 11, 1:56 PM PST | High Surf Advisory | SGX | 46 hr |
| Jan 12, 10:23 AM PST | Areal Flood Advisory | SGX | 112 min |
| Jan 12, 4:25 PM PST | Special Weather Statement | SGX | 50 min |
| Jan 12, 5:00 PM PST | Special Weather Statement | SGX | 45 min |
| Jan 13, 1:51 PM PST | Beach Hazards Statement | SGX | 4 days |
| Jan 13, 3:00 PM PST | Flash Flood Watch | SGX | 30 hr |
| Jan 14, 12:45 PM PST | Areal Flood Advisory | SGX | 3 hr |
| Jan 15, 7:17 PM PST | Areal Flood Advisory | SGX | 5 hr |
| Jan 15, 7:19 PM PST | Flash Flood Watch | SGX | 47 hr |
| Jan 15, 8:29 PM PST | Flash Flood Warning | SGX | 3 hr |
| Jan 16, 3:57 PM PST | High Surf Advisory | SGX | 59 hr |
| Jan 16, 7:20 PM PST | Areal Flood Advisory | SGX | 115 min |
| Jan 17, 8:38 AM PST | Areal Flood Advisory | SGX | 5 hr |
| Jan 17, 1:34 PM PST | Areal Flood Advisory | SGX | 3 hr |
| Jan 19, 3:08 AM PST | Beach Hazards Statement | SGX | 3 days |
| Jan 20, 3:10 PM PST | High Wind Watch | SGX | 12 hr |
| Jan 21, 3:08 AM PST | Wind Advisory | SGX | 57 hr |
| Jan 23, 12:00 PM PST | Wind Advisory | SGX | 24 hr |
| Jan 25, 2:44 AM PST | Wind Advisory | SGX | 39 hr |
| Jan 30, 12:33 PM PST | Flash Flood Watch | SGX | 29 hr |
| Jan 31, 10:12 AM PST | Beach Hazards Statement | SGX | 9 hr |
| Jan 31, 11:20 AM PST | Areal Flood Advisory | SGX | 3 hr |
| Jan 31, 9:21 PM PST | Flash Flood Watch | SGX | 45 hr |
| Feb 1, 1:28 PM PST | Wind Advisory | SGX | 29 hr |
| Feb 1, 1:51 PM PST | Beach Hazards Statement | SGX | 40 hr |
| Feb 1, 9:54 PM PST | High Surf Advisory | SGX | 61 hr |
| Feb 2, 12:36 PM PST | Areal Flood Advisory | SGX | 3 hr |
| Feb 2, 1:30 PM PST | Flash Flood Warning | SGX | 3 hr |
| Feb 2, 2:17 PM PST | Flash Flood Warning | SGX | 3 hr |
| Feb 4, 1:46 PM PST | Areal Flood Advisory | SGX | 3 hr |
| Feb 6, 2:28 PM PST | Frost Advisory | SGX | 19 hr |
| Feb 12, 2:04 PM PST | Flash Flood Watch | SGX | 51 hr |
| Feb 14, 2:32 AM PST | Wind Advisory | SGX | 35 hr |
| Feb 14, 3:10 AM PST | Areal Flood Advisory | SGX | 9 hr |
| Feb 14, 5:41 AM PST | Flash Flood Warning | SGX | 5 hr |
| Feb 14, 10:49 AM PST | Flash Flood Warning | SGX | 3 hr |
| Feb 14, 2:04 PM PST | Beach Hazards Statement | SGX | 3 days |
| Feb 14, 2:12 PM PST | Areal Flood Warning | SGX | 3 hr |
| Feb 16, 8:17 PM PST | Winter Weather Advisory | SGX | 30 hr |
| Feb 17, 2:54 AM PST | Wind Advisory | SGX | 24 hr |
| Feb 21, 1:45 PM PST | Frost Advisory | SGX | 19 hr |
| Feb 21, 3:21 PM PST | Special Weather Statement | SGX | 54 min |
| Feb 21, 4:53 PM PST | Special Weather Statement | SGX | 67 min |
| Mar 6, 1:26 AM PST | Beach Hazards Statement | SGX | 9 min |
| Mar 6, 1:35 AM PST | Beach Hazards Statement | SGX | 2 hr |
| Mar 6, 9:28 AM PST | Areal Flood Advisory | SGX | 3 hr |
| Mar 13, 1:33 PM PDT | Wind Advisory | SGX | 71 hr |
| Mar 19, 1:43 AM PDT | High Surf Advisory | SGX | 3 days |
| Mar 20, 12:08 PM PDT | Beach Hazards Statement | SGX | 7 hr |
| Mar 20, 4:20 PM PDT | Special Weather Statement | LOX | 40 min |
| Mar 22, 1:12 PM PDT | High Surf Advisory | SGX | 56 hr |
| Apr 8, 1:55 PM PDT | Wind Advisory | SGX | 36 hr |
| Apr 9, 1:49 PM PDT | Beach Hazards Statement | SGX | 28 hr |
| Apr 12, 2:09 AM PDT | Beach Hazards Statement | SGX | 17 hr |
| May 6, 4:28 PM PDT | Special Weather Statement | SGX | 92 min |
| May 13, 11:54 AM PDT | High Surf Advisory | SGX | 53 hr |
| May 19, 1:51 PM PDT | Beach Hazards Statement | SGX | 43 hr |
| May 21, 1:05 PM PDT | Beach Hazards Statement | SGX | 36 hr |
| May 22, 1:49 PM PDT | Special Weather Statement | SGX | 41 min |
| May 22, 3:11 PM PDT | Areal Flood Advisory | SGX | 3 hr |
| Jun 10, 7:57 PM PDT | Heat Advisory | SGX | 24 hr |
| Jun 30, 6:06 PM PDT | Beach Hazards Statement | SGX | 7 days |
| Jul 9, 3:31 PM PDT | Beach Hazards Statement | SGX | 25 hr |
| Jul 16, 4:33 AM PDT | Dense Fog Advisory | SGX | 3 hr |
| Aug 12, 2:26 PM PDT | Heat Advisory | SGX | 3 days |
| Aug 22, 1:06 PM PDT | Beach Hazards Statement | SGX | 4 days |
| Sep 3, 1:10 PM PDT | Heat Advisory | SGX | 55 hr |
| Sep 5, 12:17 PM PDT | Special Weather Statement | SGX | 43 min |
| Sep 5, 12:32 PM PDT | Special Weather Statement | SGX | 28 min |
| Oct 7, 1:47 PM PDT | Fire Weather Watch | SGX | 24 hr |
| Oct 8, 1:42 PM PDT | Red Flag Warning | SGX | 3 days |
| Oct 21, 3:04 PM PDT | Fire Weather Watch | SGX | 22 hr |
| Oct 22, 3:23 AM PDT | Heat Advisory | SGX | 14 hr |
| Oct 22, 1:11 PM PDT | Red Flag Warning | SGX | 3 days |
| Oct 23, 3:24 PM PDT | High Wind Warning | SGX | 47 hr |
| Oct 24, 6:51 AM PDT | Heat Advisory | SGX | 34 hr |
| Oct 25, 2:17 PM PDT | Fire Weather Watch | SGX | 43 hr |
| Oct 26, 11:29 AM PDT | High Wind Watch | SGX | 16 hr |
| Oct 26, 1:19 PM PDT | Red Flag Warning | SGX | 53 hr |
| Oct 27, 3:46 AM PDT | High Wind Warning | SGX | 32 hr |
| Oct 27, 1:00 PM PDT | Fire Weather Watch | SGX | 25 hr |
| Oct 28, 1:45 PM PDT | Red Flag Warning | SGX | 3 days |
| Oct 28, 2:05 PM PDT | High Wind Watch | SGX | 19 hr |
| Oct 29, 9:05 AM PDT | High Wind Warning | SGX | 51 hr |
| Nov 6, 2:51 AM PST | Dense Fog Advisory | SGX | 5 hr |
| Nov 7, 3:41 AM PST | Dense Fog Advisory | SGX | 4 hr |
| Nov 7, 8:03 AM PST | Dense Fog Advisory | SGX | 117 min |
| Nov 8, 12:08 AM PST | Dense Fog Advisory | SGX | 8 hr |
| Nov 13, 2:07 AM PST | Dense Fog Advisory | SGX | 7 hr |
| Nov 16, 9:28 AM PST | Red Flag Warning | SGX | 33 hr |
| Nov 18, 1:40 PM PST | Flash Flood Watch | SGX | 59 hr |
| Nov 19, 2:21 PM PST | Beach Hazards Statement | SGX | 46 hr |
| Nov 24, 12:42 PM PST | Beach Hazards Statement | SGX | 5 days |
| Nov 24, 1:40 PM PST | Winter Storm Watch | SGX | 24 hr |
| Nov 24, 1:50 PM PST | Flash Flood Watch | SGX | 4 days |
| Nov 25, 1:16 PM PST | Winter Storm Warning | SGX | 4 days |
| Nov 25, 8:07 PM PST | Wind Advisory | SGX | 11 hr |
| Nov 27, 7:36 PM PST | Wind Advisory | SGX | 19 hr |
| Nov 28, 7:56 AM PST | Areal Flood Advisory | SGX | 3 hr |
| Nov 28, 8:34 AM PST | Flash Flood Warning | SGX | 3 hr |
| Nov 28, 11:27 AM PST | Areal Flood Advisory | SGX | 3 hr |
| Dec 1, 1:30 AM PST | High Surf Advisory | SGX | 57 hr |
| Dec 3, 1:07 PM PST | Flash Flood Watch | SGX | 29 hr |
| Dec 4, 7:55 AM PST | Areal Flood Advisory | SGX | 6 hr |
| Dec 6, 1:49 AM PST | High Surf Advisory | SGX | 3 days |
| Dec 10, 1:34 PM PST | Beach Hazards Statement | SGX | 48 hr |
| Dec 12, 1:28 PM PST | High Surf Advisory | SGX | 13 hr |
| Dec 13, 2:55 AM PST | High Surf Advisory | SGX | 58 hr |
| Dec 15, 1:58 PM PST | Wind Advisory | SGX | 61 hr |
| Dec 16, 2:52 PM PST | High Wind Warning | SGX | 31 hr |
| Dec 23, 3:47 AM PST | Areal Flood Advisory | SGX | 6 hr |
| Dec 25, 3:11 AM PST | Wind Advisory | SGX | 29 hr |
| Dec 25, 10:42 PM PST | Areal Flood Advisory | SGX | 7 hr |
| Dec 26, 12:05 AM PST | Tornado Warning | SGX | 9 min |
| Dec 26, 3:07 AM PST | Areal Flood Advisory | SGX | 4 hr |
| Dec 30, 10:52 AM PST | Wind Advisory | SGX | 29 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 | |
| Tornado Warning | 1 |
| Special Weather Statement | 9 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 6 |
| Flash Flood Watch | 8 |
| Areal Flood Advisory | 19 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 1 |
| Heat | |
| Heat Advisory | 5 |
| Cold | |
| Frost Advisory | 2 |
| Wind and dust | |
| High Wind Warning | 4 |
| High Wind Watch | 3 |
| Wind Advisory | 14 |
| Fire | |
| Red Flag Warning | 5 |
| Fire Weather Watch | 4 |
| Fog and smoke | |
| Dense Fog Advisory | 6 |
| Coast and beach | |
| High Surf Advisory | 12 |
| Beach Hazards Statement | 20 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20182020
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.