Alert archive / California / Orange County
Weather alerts in Orange County, California, 2023
125 weather alerts in 2023, 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 2023. Tap one for its archive.
- Alerts
- 125
- Warnings
- 9
- Watches
- 18
- Advisories
- 72
- Busiest month
- January33 alerts
- Busiest day
- January 10, 20237 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, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 0 | 3 | 0% | |||
| Flash flood warnings | 0 | 4 | 0% |
Each office's whole area, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Hanford, CA: tornado warnings | 6 | 0 | 100% | 1 | 0% | |
| NWS Hanford, CA: severe thunderstorm warnings | 24 | 2 | 92% | 41 | 24% | 15 min |
| NWS Hanford, CA: flash flood warnings | 60 | 8 | 87% | 59 | 20% | 193 min |
| NWS Las Vegas, NV: tornado warnings | 1 | 0 | 100% | 0 | ||
| NWS Las Vegas, NV: severe thunderstorm warnings | 52 | 6 | 88% | 37 | 22% | 21 min |
| NWS Las Vegas, NV: flash flood warnings | 146 | 56 | 62% | 184 | 68% | 114 min |
| NWS San Francisco Bay Area, CA: severe thunderstorm warnings | 3 | 2 | 33% | 58 | 12% | 23 min |
| NWS San Francisco Bay Area, CA: flash flood warnings | 11 | 1 | 91% | 8 | 13% | 172 min |
| NWS Sacramento, CA: tornado warnings | 3 | 1 | 67% | 4 | 25% | 27 min |
| NWS Sacramento, CA: severe thunderstorm warnings | 24 | 6 | 75% | 39 | 56% | 18 min |
| NWS Sacramento, CA: flash flood warnings | 8 | 4 | 50% | 24 | 33% | 38 min |
| NWS Eureka, CA: tornado warnings | 0 | 1 | 0% | |||
| NWS Eureka, CA: severe thunderstorm warnings | 3 | 0 | 100% | 0 | ||
| NWS Eureka, CA: flash flood warnings | 4 | 0 | 100% | 18 | 0% | |
| NWS Los Angeles, CA: tornado warnings | 4 | 0 | 100% | 8 | 0% | |
| NWS Los Angeles, CA: severe thunderstorm warnings | 1 | 0 | 100% | 5 | 0% | |
| NWS Los Angeles, CA: flash flood warnings | 30 | 22 | 27% | 190 | 73% | 210 min |
| NWS Medford, OR: severe thunderstorm warnings | 12 | 1 | 92% | 3 | 33% | 6 min |
| NWS Medford, OR: flash flood warnings | 6 | 2 | 67% | 3 | 67% | 37 min |
| NWS San Diego, CA: tornado warnings | 2 | 0 | 100% | 0 | ||
| NWS San Diego, CA: severe thunderstorm warnings | 9 | 0 | 100% | 12 | 0% | |
| NWS San Diego, CA: flash flood warnings | 19 | 8 | 58% | 89 | 13% | 141 min |
| NWS Phoenix, AZ: severe thunderstorm warnings | 87 | 23 | 74% | 71 | 77% | 21 min |
| NWS Phoenix, AZ: flash flood warnings | 47 | 21 | 55% | 50 | 88% | 96 min |
| NWS Reno, NV: severe thunderstorm warnings | 18 | 1 | 94% | 8 | 13% | 21 min |
| NWS Reno, NV: flash flood warnings | 18 | 0 | 100% | 16 | 0% |
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 |
|---|---|---|---|
| Dec 31, 10:28 PM PST | Areal Flood Advisory | SGX | 3 hr |
| Jan 2, 9:32 PM PST | Beach Hazards Statement | SGX | 24 hr |
| Jan 3, 12:31 PM PST | Flood Watch | SGX | 51 hr |
| Jan 3, 12:59 PM PST | Wind Advisory | SGX | 53 hr |
| Jan 3, 9:19 PM PST | Coastal Flood Advisory | SGX | 69 hr |
| Jan 3, 9:19 PM PST | High Surf Advisory | SGX | 69 hr |
| Jan 5, 10:09 AM PST | Areal Flood Advisory | SGX | 118 min |
| Jan 5, 12:10 PM PST | Areal Flood Advisory | SGX | 118 min |
| Jan 6, 1:13 PM PST | Beach Hazards Statement | SGX | 49 hr |
| Jan 8, 12:35 PM PST | Flood Watch | SGX | 50 hr |
| Jan 9, 7:40 AM PST | Wind Advisory | SGX | 40 hr |
| Jan 9, 1:25 PM PST | High Surf Advisory | SGX | 8 days |
| Jan 9, 9:46 PM PST | Areal Flood Advisory | SGX | 116 min |
| Jan 10, 8:44 AM PST | Areal Flood Advisory | SGX | 4 hr |
| Jan 10, 10:34 AM PST | Special Weather Statement | SGX | 41 min |
| Jan 10, 11:06 AM PST | Special Weather Statement | SGX | 39 min |
| Jan 10, 11:20 AM PST | Special Weather Statement | SGX | 40 min |
| Jan 10, 11:24 AM PST | Areal Flood Advisory | SGX | 3 hr |
| Jan 10, 12:13 PM PST | Areal Flood Advisory | SGX | 2 hr |
| Jan 13, 1:15 PM PST | Flood Watch | SGX | 37 hr |
| Jan 13, 1:30 PM PST | Wind Advisory | SGX | 4 days |
| Jan 14, 1:02 PM PST | Areal Flood Advisory | SGX | 10 hr |
| Jan 14, 3:17 PM PST | Areal Flood Advisory | SGX | 9 hr |
| Jan 15, 2:22 PM PST | Wind Advisory | SGX | 31 hr |
| Jan 18, 1:40 PM PST | Beach Hazards Statement | SGX | 5 days |
| Jan 21, 2:46 AM PST | High Wind Watch | SGX | 11 hr |
| Jan 21, 1:22 PM PST | High Wind Warning | SGX | 51 hr |
| Jan 21, 1:22 PM PST | Wind Advisory | SGX | 51 hr |
| Jan 23, 8:34 PM PST | Beach Hazards Statement | SGX | 53 hr |
| Jan 24, 1:02 PM PST | High Wind Watch | SGX | 13 hr |
| Jan 25, 2:22 AM PST | High Wind Warning | SGX | 43 hr |
| Jan 25, 2:22 AM PST | Wind Advisory | SGX | 43 hr |
| Jan 30, 12:52 PM PST | Wind Advisory | SGX | 27 hr |
| Feb 1, 2:30 AM PST | Wind Advisory | SGX | 10 hr |
| Feb 9, 2:22 AM PST | Wind Advisory | SGX | 35 hr |
| Feb 10, 12:53 PM PST | Beach Hazards Statement | SGX | 50 hr |
| Feb 13, 3:25 AM PST | Wind Advisory | SGX | 42 hr |
| Feb 13, 6:49 PM PST | Beach Hazards Statement | SGX | 37 hr |
| Feb 20, 2:53 AM PST | Wind Advisory | SGX | 65 hr |
| Feb 20, 3:30 AM PST | Winter Storm Watch | SGX | 16 hr |
| Feb 20, 1:14 PM PST | High Surf Advisory | SGX | 61 hr |
| Feb 20, 7:47 PM PST | Winter Storm Warning | SGX | 5 days |
| Feb 22, 1:35 PM PST | Flood Watch | SGX | 3 days |
| Feb 23, 3:03 AM PST | Wind Advisory | SGX | 51 hr |
| Feb 23, 10:28 AM PST | Special Weather Statement | SGX | 32 min |
| Feb 23, 12:42 PM PST | Special Weather Statement | SGX | 33 min |
| Feb 24, 2:19 PM PST | Areal Flood Advisory | SGX | 3 hr |
| Feb 25, 1:12 AM PST | Areal Flood Advisory | SGX | 11 hr |
| Feb 25, 1:19 PM PST | Beach Hazards Statement | SGX | 11 hr |
| Feb 25, 5:25 PM PST | Winter Weather Advisory | SGX | 11 hr |
| Feb 28, 3:03 AM PST | Wind Advisory | SGX | 39 hr |
| Feb 28, 4:15 AM PST | Winter Weather Advisory | SGX | 40 hr |
| Mar 1, 1:29 PM PST | Frost Advisory | SGX | 19 hr |
| Mar 10, 3:00 PM PST | Areal Flood Advisory | SGX | 3 hr |
| Mar 10, 4:51 PM PST | Areal Flood Advisory | SGX | 4 hr |
| Mar 13, 1:02 PM PDT | Flood Watch | SGX | 48 hr |
| Mar 14, 10:04 PM PDT | Areal Flood Advisory | SGX | 6 hr |
| Mar 14, 11:31 PM PDT | Areal Flood Advisory | SGX | 5 hr |
| Mar 15, 4:36 AM PDT | Areal Flood Advisory | SGX | 3 hr |
| Mar 15, 4:37 AM PDT | Areal Flood Advisory | SGX | 3 hr |
| Mar 19, 3:00 AM PDT | High Wind Watch | SGX | 26 hr |
| Mar 20, 2:07 AM PDT | High Surf Advisory | SGX | 4 days |
| Mar 20, 4:45 AM PDT | High Wind Warning | SGX | 47 hr |
| Mar 20, 1:13 PM PDT | Flood Watch | SGX | 48 hr |
| Mar 21, 5:34 PM PDT | Areal Flood Advisory | SGX | 116 min |
| Mar 21, 7:39 PM PDT | Special Weather Statement | LOX | 36 min |
| Mar 21, 8:32 PM PDT | Special Weather Statement | SGX | 43 min |
| Mar 26, 1:27 PM PDT | Wind Advisory | SGX | 25 hr |
| Mar 30, 9:06 AM PDT | Special Weather Statement | SGX | 39 min |
| Apr 2, 2:55 AM PDT | Wind Advisory | SGX | 48 hr |
| Apr 2, 12:28 PM PDT | High Surf Advisory | SGX | 47 hr |
| Apr 9, 1:51 PM PDT | Dense Fog Advisory | SGX | 20 hr |
| Apr 10, 2:30 PM PDT | Dense Fog Advisory | SGX | 19 hr |
| May 4, 10:15 AM PDT | Special Weather Statement | SGX | 30 min |
| May 16, 1:22 PM PDT | Beach Hazards Statement | SGX | 3 days |
| Jul 8, 2:21 PM PDT | Excessive Heat Warning | SGX | 15 days |
| Jul 18, 12:57 PM PDT | Heat Advisory | SGX | 4 days |
| Jul 25, 3:49 AM PDT | Dense Fog Advisory | SGX | 5 hr |
| Jul 26, 3:12 AM PDT | Dense Fog Advisory | SGX | 5 hr |
| Aug 17, 1:31 PM PDT | Flood Watch | SGX | 4 days |
| Aug 18, 8:29 AM PDT | Tropical Storm Watch | SGX | 12 hr |
| Aug 18, 1:12 PM PDT | High Surf Advisory | SGX | 71 hr |
| Aug 18, 8:22 PM PDT | Tropical Storm Warning | SGX | 54 hr |
| Aug 20, 8:16 AM PDT | Areal Flood Advisory | SGX | 2 hr |
| Aug 20, 3:11 PM PDT | Areal Flood Advisory | SGX | 2 hr |
| Aug 20, 4:05 PM PDT | Areal Flood Advisory | SGX | 2 hr |
| Aug 25, 1:30 PM PDT | Excessive Heat Watch | SGX | 24 hr |
| Aug 26, 1:09 PM PDT | Heat Advisory | SGX | 4 days |
| Sep 1, 1:37 PM PDT | Beach Hazards Statement | SGX | 29 hr |
| Sep 2, 6:33 PM PDT | High Surf Advisory | SGX | 3 days |
| Sep 7, 9:00 PM PDT | High Surf Advisory | SGX | 65 hr |
| Sep 12, 12:05 PM PDT | Beach Hazards Statement | SGX | 70 hr |
| Sep 27, 5:02 AM PDT | Dense Fog Advisory | SGX | 4 hr |
| Oct 4, 9:08 PM PDT | Heat Advisory | SGX | 70 hr |
| Oct 6, 6:56 PM PDT | Dense Fog Advisory | SGX | 15 hr |
| Oct 7, 10:41 PM PDT | Dense Fog Advisory | SGX | 10 hr |
| Oct 11, 12:55 PM PDT | Wind Advisory | SGX | 26 hr |
| Oct 16, 1:11 PM PDT | Heat Advisory | SGX | 3 days |
| Oct 17, 9:13 PM PDT | Dense Fog Advisory | SGX | 13 hr |
| Oct 18, 8:35 PM PDT | Dense Fog Advisory | SGX | 12 hr |
| Oct 19, 11:22 AM PDT | Beach Hazards Statement | SGX | 34 hr |
| Oct 19, 8:52 PM PDT | Dense Fog Advisory | SGX | 12 hr |
| Oct 26, 1:44 PM PDT | High Wind Watch | SGX | 23 hr |
| Oct 27, 1:09 PM PDT | High Wind Warning | SGX | 3 days |
| Oct 27, 1:09 PM PDT | Wind Advisory | SGX | 4 days |
| Nov 3, 8:28 PM PDT | Dense Fog Advisory | SGX | 11 hr |
| Nov 5, 8:55 PM PST | Dense Fog Advisory | SGX | 12 hr |
| Nov 7, 12:54 PM PST | Wind Advisory | SGX | 49 hr |
| Nov 15, 8:57 AM PST | Beach Hazards Statement | SGX | 10 hr |
| Nov 15, 1:52 PM PST | Special Weather Statement | SGX | 38 min |
| Nov 18, 11:38 AM PST | High Wind Watch | SGX | 24 hr |
| Nov 19, 11:44 AM PST | High Wind Warning | SGX | 50 hr |
| Nov 19, 11:44 AM PST | Wind Advisory | SGX | 54 hr |
| Nov 24, 1:15 PM PST | Beach Hazards Statement | SGX | 69 hr |
| Dec 5, 1:10 PM PST | Beach Hazards Statement | SGX | 61 hr |
| Dec 8, 12:07 PM PST | Wind Advisory | SGX | 51 hr |
| Dec 19, 1:01 PM PST | Flood Watch | SGX | 25 hr |
| Dec 20, 1:48 AM PST | Flood Watch | SGX | 12 hr |
| Dec 20, 1:54 PM PST | Flood Watch | SGX | 56 hr |
| Dec 21, 6:47 PM PST | Beach Hazards Statement | SGX | 15 hr |
| Dec 21, 11:29 PM PST | Areal Flood Advisory | SGX | 116 min |
| Dec 22, 10:37 AM PST | Beach Hazards Statement | SGX | 5 hr |
| Dec 26, 12:52 PM PST | High Surf Advisory | SGX | 54 hr |
| Dec 27, 1:41 PM PST | High Surf Warning | SGX | 5 days |
| Dec 27, 9:01 PM PST | Coastal Flood Advisory | SGX | 4 days |
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 | 10 |
| Flooding | |
| Flood Watch | 10 |
| Areal Flood Advisory | 22 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 2 |
| Heat | |
| Excessive Heat Warning | 1 |
| Excessive Heat Watch | 1 |
| Heat Advisory | 4 |
| Cold | |
| Frost Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 5 |
| High Wind Watch | 5 |
| Wind Advisory | 20 |
| Fog and smoke | |
| Dense Fog Advisory | 12 |
| Tropical | |
| Tropical Storm Warning | 1 |
| Tropical Storm Watch | 1 |
| Coast and beach | |
| High Surf Warning | 1 |
| Coastal Flood Advisory | 2 |
| High Surf Advisory | 9 |
| Beach Hazards Statement | 16 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20222024
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.