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

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings030%
Flash flood warnings040%

Each office's whole area, 2023

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Hanford, CA: tornado warnings60100%10%
NWS Hanford, CA: severe thunderstorm warnings24292%4124%15 min
NWS Hanford, CA: flash flood warnings60887%5920%193 min
NWS Las Vegas, NV: tornado warnings10100%0
NWS Las Vegas, NV: severe thunderstorm warnings52688%3722%21 min
NWS Las Vegas, NV: flash flood warnings1465662%18468%114 min
NWS San Francisco Bay Area, CA: severe thunderstorm warnings3233%5812%23 min
NWS San Francisco Bay Area, CA: flash flood warnings11191%813%172 min
NWS Sacramento, CA: tornado warnings3167%425%27 min
NWS Sacramento, CA: severe thunderstorm warnings24675%3956%18 min
NWS Sacramento, CA: flash flood warnings8450%2433%38 min
NWS Eureka, CA: tornado warnings010%
NWS Eureka, CA: severe thunderstorm warnings30100%0
NWS Eureka, CA: flash flood warnings40100%180%
NWS Los Angeles, CA: tornado warnings40100%80%
NWS Los Angeles, CA: severe thunderstorm warnings10100%50%
NWS Los Angeles, CA: flash flood warnings302227%19073%210 min
NWS Medford, OR: severe thunderstorm warnings12192%333%6 min
NWS Medford, OR: flash flood warnings6267%367%37 min
NWS San Diego, CA: tornado warnings20100%0
NWS San Diego, CA: severe thunderstorm warnings90100%120%
NWS San Diego, CA: flash flood warnings19858%8913%141 min
NWS Phoenix, AZ: severe thunderstorm warnings872374%7177%21 min
NWS Phoenix, AZ: flash flood warnings472155%5088%96 min
NWS Reno, NV: severe thunderstorm warnings18194%813%21 min
NWS Reno, NV: flash flood warnings180100%160%

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.

IssuedProductOfficeLasted
Dec 31, 10:28 PM PSTAreal Flood AdvisorySGX3 hr
Jan 2, 9:32 PM PSTBeach Hazards StatementSGX24 hr
Jan 3, 12:31 PM PSTFlood WatchSGX51 hr
Jan 3, 12:59 PM PSTWind AdvisorySGX53 hr
Jan 3, 9:19 PM PSTCoastal Flood AdvisorySGX69 hr
Jan 3, 9:19 PM PSTHigh Surf AdvisorySGX69 hr
Jan 5, 10:09 AM PSTAreal Flood AdvisorySGX118 min
Jan 5, 12:10 PM PSTAreal Flood AdvisorySGX118 min
Jan 6, 1:13 PM PSTBeach Hazards StatementSGX49 hr
Jan 8, 12:35 PM PSTFlood WatchSGX50 hr
Jan 9, 7:40 AM PSTWind AdvisorySGX40 hr
Jan 9, 1:25 PM PSTHigh Surf AdvisorySGX8 days
Jan 9, 9:46 PM PSTAreal Flood AdvisorySGX116 min
Jan 10, 8:44 AM PSTAreal Flood AdvisorySGX4 hr
Jan 10, 10:34 AM PSTSpecial Weather StatementSGX41 min
Jan 10, 11:06 AM PSTSpecial Weather StatementSGX39 min
Jan 10, 11:20 AM PSTSpecial Weather StatementSGX40 min
Jan 10, 11:24 AM PSTAreal Flood AdvisorySGX3 hr
Jan 10, 12:13 PM PSTAreal Flood AdvisorySGX2 hr
Jan 13, 1:15 PM PSTFlood WatchSGX37 hr
Jan 13, 1:30 PM PSTWind AdvisorySGX4 days
Jan 14, 1:02 PM PSTAreal Flood AdvisorySGX10 hr
Jan 14, 3:17 PM PSTAreal Flood AdvisorySGX9 hr
Jan 15, 2:22 PM PSTWind AdvisorySGX31 hr
Jan 18, 1:40 PM PSTBeach Hazards StatementSGX5 days
Jan 21, 2:46 AM PSTHigh Wind WatchSGX11 hr
Jan 21, 1:22 PM PSTHigh Wind WarningSGX51 hr
Jan 21, 1:22 PM PSTWind AdvisorySGX51 hr
Jan 23, 8:34 PM PSTBeach Hazards StatementSGX53 hr
Jan 24, 1:02 PM PSTHigh Wind WatchSGX13 hr
Jan 25, 2:22 AM PSTHigh Wind WarningSGX43 hr
Jan 25, 2:22 AM PSTWind AdvisorySGX43 hr
Jan 30, 12:52 PM PSTWind AdvisorySGX27 hr
Feb 1, 2:30 AM PSTWind AdvisorySGX10 hr
Feb 9, 2:22 AM PSTWind AdvisorySGX35 hr
Feb 10, 12:53 PM PSTBeach Hazards StatementSGX50 hr
Feb 13, 3:25 AM PSTWind AdvisorySGX42 hr
Feb 13, 6:49 PM PSTBeach Hazards StatementSGX37 hr
Feb 20, 2:53 AM PSTWind AdvisorySGX65 hr
Feb 20, 3:30 AM PSTWinter Storm WatchSGX16 hr
Feb 20, 1:14 PM PSTHigh Surf AdvisorySGX61 hr
Feb 20, 7:47 PM PSTWinter Storm WarningSGX5 days
Feb 22, 1:35 PM PSTFlood WatchSGX3 days
Feb 23, 3:03 AM PSTWind AdvisorySGX51 hr
Feb 23, 10:28 AM PSTSpecial Weather StatementSGX32 min
Feb 23, 12:42 PM PSTSpecial Weather StatementSGX33 min
Feb 24, 2:19 PM PSTAreal Flood AdvisorySGX3 hr
Feb 25, 1:12 AM PSTAreal Flood AdvisorySGX11 hr
Feb 25, 1:19 PM PSTBeach Hazards StatementSGX11 hr
Feb 25, 5:25 PM PSTWinter Weather AdvisorySGX11 hr
Feb 28, 3:03 AM PSTWind AdvisorySGX39 hr
Feb 28, 4:15 AM PSTWinter Weather AdvisorySGX40 hr
Mar 1, 1:29 PM PSTFrost AdvisorySGX19 hr
Mar 10, 3:00 PM PSTAreal Flood AdvisorySGX3 hr
Mar 10, 4:51 PM PSTAreal Flood AdvisorySGX4 hr
Mar 13, 1:02 PM PDTFlood WatchSGX48 hr
Mar 14, 10:04 PM PDTAreal Flood AdvisorySGX6 hr
Mar 14, 11:31 PM PDTAreal Flood AdvisorySGX5 hr
Mar 15, 4:36 AM PDTAreal Flood AdvisorySGX3 hr
Mar 15, 4:37 AM PDTAreal Flood AdvisorySGX3 hr
Mar 19, 3:00 AM PDTHigh Wind WatchSGX26 hr
Mar 20, 2:07 AM PDTHigh Surf AdvisorySGX4 days
Mar 20, 4:45 AM PDTHigh Wind WarningSGX47 hr
Mar 20, 1:13 PM PDTFlood WatchSGX48 hr
Mar 21, 5:34 PM PDTAreal Flood AdvisorySGX116 min
Mar 21, 7:39 PM PDTSpecial Weather StatementLOX36 min
Mar 21, 8:32 PM PDTSpecial Weather StatementSGX43 min
Mar 26, 1:27 PM PDTWind AdvisorySGX25 hr
Mar 30, 9:06 AM PDTSpecial Weather StatementSGX39 min
Apr 2, 2:55 AM PDTWind AdvisorySGX48 hr
Apr 2, 12:28 PM PDTHigh Surf AdvisorySGX47 hr
Apr 9, 1:51 PM PDTDense Fog AdvisorySGX20 hr
Apr 10, 2:30 PM PDTDense Fog AdvisorySGX19 hr
May 4, 10:15 AM PDTSpecial Weather StatementSGX30 min
May 16, 1:22 PM PDTBeach Hazards StatementSGX3 days
Jul 8, 2:21 PM PDTExcessive Heat WarningSGX15 days
Jul 18, 12:57 PM PDTHeat AdvisorySGX4 days
Jul 25, 3:49 AM PDTDense Fog AdvisorySGX5 hr
Jul 26, 3:12 AM PDTDense Fog AdvisorySGX5 hr
Aug 17, 1:31 PM PDTFlood WatchSGX4 days
Aug 18, 8:29 AM PDTTropical Storm WatchSGX12 hr
Aug 18, 1:12 PM PDTHigh Surf AdvisorySGX71 hr
Aug 18, 8:22 PM PDTTropical Storm WarningSGX54 hr
Aug 20, 8:16 AM PDTAreal Flood AdvisorySGX2 hr
Aug 20, 3:11 PM PDTAreal Flood AdvisorySGX2 hr
Aug 20, 4:05 PM PDTAreal Flood AdvisorySGX2 hr
Aug 25, 1:30 PM PDTExcessive Heat WatchSGX24 hr
Aug 26, 1:09 PM PDTHeat AdvisorySGX4 days
Sep 1, 1:37 PM PDTBeach Hazards StatementSGX29 hr
Sep 2, 6:33 PM PDTHigh Surf AdvisorySGX3 days
Sep 7, 9:00 PM PDTHigh Surf AdvisorySGX65 hr
Sep 12, 12:05 PM PDTBeach Hazards StatementSGX70 hr
Sep 27, 5:02 AM PDTDense Fog AdvisorySGX4 hr
Oct 4, 9:08 PM PDTHeat AdvisorySGX70 hr
Oct 6, 6:56 PM PDTDense Fog AdvisorySGX15 hr
Oct 7, 10:41 PM PDTDense Fog AdvisorySGX10 hr
Oct 11, 12:55 PM PDTWind AdvisorySGX26 hr
Oct 16, 1:11 PM PDTHeat AdvisorySGX3 days
Oct 17, 9:13 PM PDTDense Fog AdvisorySGX13 hr
Oct 18, 8:35 PM PDTDense Fog AdvisorySGX12 hr
Oct 19, 11:22 AM PDTBeach Hazards StatementSGX34 hr
Oct 19, 8:52 PM PDTDense Fog AdvisorySGX12 hr
Oct 26, 1:44 PM PDTHigh Wind WatchSGX23 hr
Oct 27, 1:09 PM PDTHigh Wind WarningSGX3 days
Oct 27, 1:09 PM PDTWind AdvisorySGX4 days
Nov 3, 8:28 PM PDTDense Fog AdvisorySGX11 hr
Nov 5, 8:55 PM PSTDense Fog AdvisorySGX12 hr
Nov 7, 12:54 PM PSTWind AdvisorySGX49 hr
Nov 15, 8:57 AM PSTBeach Hazards StatementSGX10 hr
Nov 15, 1:52 PM PSTSpecial Weather StatementSGX38 min
Nov 18, 11:38 AM PSTHigh Wind WatchSGX24 hr
Nov 19, 11:44 AM PSTHigh Wind WarningSGX50 hr
Nov 19, 11:44 AM PSTWind AdvisorySGX54 hr
Nov 24, 1:15 PM PSTBeach Hazards StatementSGX69 hr
Dec 5, 1:10 PM PSTBeach Hazards StatementSGX61 hr
Dec 8, 12:07 PM PSTWind AdvisorySGX51 hr
Dec 19, 1:01 PM PSTFlood WatchSGX25 hr
Dec 20, 1:48 AM PSTFlood WatchSGX12 hr
Dec 20, 1:54 PM PSTFlood WatchSGX56 hr
Dec 21, 6:47 PM PSTBeach Hazards StatementSGX15 hr
Dec 21, 11:29 PM PSTAreal Flood AdvisorySGX116 min
Dec 22, 10:37 AM PSTBeach Hazards StatementSGX5 hr
Dec 26, 12:52 PM PSTHigh Surf AdvisorySGX54 hr
Dec 27, 1:41 PM PSTHigh Surf WarningSGX5 days
Dec 27, 9:01 PM PSTCoastal Flood AdvisorySGX4 days

By product

Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.

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.