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

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings00
Flash flood warnings6350%1354%38 min

Each office's whole area, 2019

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS San Diego, CA: tornado warnings10100%0
NWS San Diego, CA: severe thunderstorm warnings16569%1867%16 min
NWS San Diego, CA: flash flood warnings361656%8448%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.

IssuedProductOfficeLasted
Jan 2, 2:41 AM PSTWind AdvisorySGX11 hr
Jan 3, 2:44 AM PSTBeach Hazards StatementSGX34 hr
Jan 4, 1:11 PM PSTHigh Surf AdvisorySGX61 hr
Jan 5, 9:51 PM PSTAreal Flood AdvisorySGX100 min
Jan 7, 1:31 PM PSTHigh Surf AdvisorySGX3 days
Jan 10, 6:57 PM PSTBeach Hazards StatementSGX19 hr
Jan 11, 1:56 PM PSTHigh Surf AdvisorySGX46 hr
Jan 12, 10:23 AM PSTAreal Flood AdvisorySGX112 min
Jan 12, 4:25 PM PSTSpecial Weather StatementSGX50 min
Jan 12, 5:00 PM PSTSpecial Weather StatementSGX45 min
Jan 13, 1:51 PM PSTBeach Hazards StatementSGX4 days
Jan 13, 3:00 PM PSTFlash Flood WatchSGX30 hr
Jan 14, 12:45 PM PSTAreal Flood AdvisorySGX3 hr
Jan 15, 7:17 PM PSTAreal Flood AdvisorySGX5 hr
Jan 15, 7:19 PM PSTFlash Flood WatchSGX47 hr
Jan 15, 8:29 PM PSTFlash Flood WarningSGX3 hr
Jan 16, 3:57 PM PSTHigh Surf AdvisorySGX59 hr
Jan 16, 7:20 PM PSTAreal Flood AdvisorySGX115 min
Jan 17, 8:38 AM PSTAreal Flood AdvisorySGX5 hr
Jan 17, 1:34 PM PSTAreal Flood AdvisorySGX3 hr
Jan 19, 3:08 AM PSTBeach Hazards StatementSGX3 days
Jan 20, 3:10 PM PSTHigh Wind WatchSGX12 hr
Jan 21, 3:08 AM PSTWind AdvisorySGX57 hr
Jan 23, 12:00 PM PSTWind AdvisorySGX24 hr
Jan 25, 2:44 AM PSTWind AdvisorySGX39 hr
Jan 30, 12:33 PM PSTFlash Flood WatchSGX29 hr
Jan 31, 10:12 AM PSTBeach Hazards StatementSGX9 hr
Jan 31, 11:20 AM PSTAreal Flood AdvisorySGX3 hr
Jan 31, 9:21 PM PSTFlash Flood WatchSGX45 hr
Feb 1, 1:28 PM PSTWind AdvisorySGX29 hr
Feb 1, 1:51 PM PSTBeach Hazards StatementSGX40 hr
Feb 1, 9:54 PM PSTHigh Surf AdvisorySGX61 hr
Feb 2, 12:36 PM PSTAreal Flood AdvisorySGX3 hr
Feb 2, 1:30 PM PSTFlash Flood WarningSGX3 hr
Feb 2, 2:17 PM PSTFlash Flood WarningSGX3 hr
Feb 4, 1:46 PM PSTAreal Flood AdvisorySGX3 hr
Feb 6, 2:28 PM PSTFrost AdvisorySGX19 hr
Feb 12, 2:04 PM PSTFlash Flood WatchSGX51 hr
Feb 14, 2:32 AM PSTWind AdvisorySGX35 hr
Feb 14, 3:10 AM PSTAreal Flood AdvisorySGX9 hr
Feb 14, 5:41 AM PSTFlash Flood WarningSGX5 hr
Feb 14, 10:49 AM PSTFlash Flood WarningSGX3 hr
Feb 14, 2:04 PM PSTBeach Hazards StatementSGX3 days
Feb 14, 2:12 PM PSTAreal Flood WarningSGX3 hr
Feb 16, 8:17 PM PSTWinter Weather AdvisorySGX30 hr
Feb 17, 2:54 AM PSTWind AdvisorySGX24 hr
Feb 21, 1:45 PM PSTFrost AdvisorySGX19 hr
Feb 21, 3:21 PM PSTSpecial Weather StatementSGX54 min
Feb 21, 4:53 PM PSTSpecial Weather StatementSGX67 min
Mar 6, 1:26 AM PSTBeach Hazards StatementSGX9 min
Mar 6, 1:35 AM PSTBeach Hazards StatementSGX2 hr
Mar 6, 9:28 AM PSTAreal Flood AdvisorySGX3 hr
Mar 13, 1:33 PM PDTWind AdvisorySGX71 hr
Mar 19, 1:43 AM PDTHigh Surf AdvisorySGX3 days
Mar 20, 12:08 PM PDTBeach Hazards StatementSGX7 hr
Mar 20, 4:20 PM PDTSpecial Weather StatementLOX40 min
Mar 22, 1:12 PM PDTHigh Surf AdvisorySGX56 hr
Apr 8, 1:55 PM PDTWind AdvisorySGX36 hr
Apr 9, 1:49 PM PDTBeach Hazards StatementSGX28 hr
Apr 12, 2:09 AM PDTBeach Hazards StatementSGX17 hr
May 6, 4:28 PM PDTSpecial Weather StatementSGX92 min
May 13, 11:54 AM PDTHigh Surf AdvisorySGX53 hr
May 19, 1:51 PM PDTBeach Hazards StatementSGX43 hr
May 21, 1:05 PM PDTBeach Hazards StatementSGX36 hr
May 22, 1:49 PM PDTSpecial Weather StatementSGX41 min
May 22, 3:11 PM PDTAreal Flood AdvisorySGX3 hr
Jun 10, 7:57 PM PDTHeat AdvisorySGX24 hr
Jun 30, 6:06 PM PDTBeach Hazards StatementSGX7 days
Jul 9, 3:31 PM PDTBeach Hazards StatementSGX25 hr
Jul 16, 4:33 AM PDTDense Fog AdvisorySGX3 hr
Aug 12, 2:26 PM PDTHeat AdvisorySGX3 days
Aug 22, 1:06 PM PDTBeach Hazards StatementSGX4 days
Sep 3, 1:10 PM PDTHeat AdvisorySGX55 hr
Sep 5, 12:17 PM PDTSpecial Weather StatementSGX43 min
Sep 5, 12:32 PM PDTSpecial Weather StatementSGX28 min
Oct 7, 1:47 PM PDTFire Weather WatchSGX24 hr
Oct 8, 1:42 PM PDTRed Flag WarningSGX3 days
Oct 21, 3:04 PM PDTFire Weather WatchSGX22 hr
Oct 22, 3:23 AM PDTHeat AdvisorySGX14 hr
Oct 22, 1:11 PM PDTRed Flag WarningSGX3 days
Oct 23, 3:24 PM PDTHigh Wind WarningSGX47 hr
Oct 24, 6:51 AM PDTHeat AdvisorySGX34 hr
Oct 25, 2:17 PM PDTFire Weather WatchSGX43 hr
Oct 26, 11:29 AM PDTHigh Wind WatchSGX16 hr
Oct 26, 1:19 PM PDTRed Flag WarningSGX53 hr
Oct 27, 3:46 AM PDTHigh Wind WarningSGX32 hr
Oct 27, 1:00 PM PDTFire Weather WatchSGX25 hr
Oct 28, 1:45 PM PDTRed Flag WarningSGX3 days
Oct 28, 2:05 PM PDTHigh Wind WatchSGX19 hr
Oct 29, 9:05 AM PDTHigh Wind WarningSGX51 hr
Nov 6, 2:51 AM PSTDense Fog AdvisorySGX5 hr
Nov 7, 3:41 AM PSTDense Fog AdvisorySGX4 hr
Nov 7, 8:03 AM PSTDense Fog AdvisorySGX117 min
Nov 8, 12:08 AM PSTDense Fog AdvisorySGX8 hr
Nov 13, 2:07 AM PSTDense Fog AdvisorySGX7 hr
Nov 16, 9:28 AM PSTRed Flag WarningSGX33 hr
Nov 18, 1:40 PM PSTFlash Flood WatchSGX59 hr
Nov 19, 2:21 PM PSTBeach Hazards StatementSGX46 hr
Nov 24, 12:42 PM PSTBeach Hazards StatementSGX5 days
Nov 24, 1:40 PM PSTWinter Storm WatchSGX24 hr
Nov 24, 1:50 PM PSTFlash Flood WatchSGX4 days
Nov 25, 1:16 PM PSTWinter Storm WarningSGX4 days
Nov 25, 8:07 PM PSTWind AdvisorySGX11 hr
Nov 27, 7:36 PM PSTWind AdvisorySGX19 hr
Nov 28, 7:56 AM PSTAreal Flood AdvisorySGX3 hr
Nov 28, 8:34 AM PSTFlash Flood WarningSGX3 hr
Nov 28, 11:27 AM PSTAreal Flood AdvisorySGX3 hr
Dec 1, 1:30 AM PSTHigh Surf AdvisorySGX57 hr
Dec 3, 1:07 PM PSTFlash Flood WatchSGX29 hr
Dec 4, 7:55 AM PSTAreal Flood AdvisorySGX6 hr
Dec 6, 1:49 AM PSTHigh Surf AdvisorySGX3 days
Dec 10, 1:34 PM PSTBeach Hazards StatementSGX48 hr
Dec 12, 1:28 PM PSTHigh Surf AdvisorySGX13 hr
Dec 13, 2:55 AM PSTHigh Surf AdvisorySGX58 hr
Dec 15, 1:58 PM PSTWind AdvisorySGX61 hr
Dec 16, 2:52 PM PSTHigh Wind WarningSGX31 hr
Dec 23, 3:47 AM PSTAreal Flood AdvisorySGX6 hr
Dec 25, 3:11 AM PSTWind AdvisorySGX29 hr
Dec 25, 10:42 PM PSTAreal Flood AdvisorySGX7 hr
Dec 26, 12:05 AM PSTTornado WarningSGX9 min
Dec 26, 3:07 AM PSTAreal Flood AdvisorySGX4 hr
Dec 30, 10:52 AM PSTWind AdvisorySGX29 hr

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 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.