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

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings00
Flash flood warnings9367%475%15 min

Each office's whole area, 2008

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS San Diego, CA: tornado warnings60100%40%
NWS San Diego, CA: severe thunderstorm warnings12283%650%29 min
NWS San Diego, CA: flash flood warnings561671%4871%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.

IssuedProductOfficeLasted
Jan 1, 12:49 AM PSTHigh Wind WarningSGX9 hr
Jan 3, 1:32 PM PSTFlash Flood WatchSGX52 hr
Jan 4, 1:20 PM PSTWind AdvisorySGX67 hr
Jan 5, 1:25 AM PSTFlash Flood WarningSGX3 hr
Jan 5, 4:37 AM PSTFlash Flood WarningSGX4 hr
Jan 5, 5:18 AM PSTDense Fog AdvisorySGX51 hr
Jan 6, 3:55 AM PSTFlash Flood WatchSGX28 hr
Jan 13, 3:45 AM PSTHigh Wind WatchSGX7 hr
Jan 13, 3:45 AM PSTWind AdvisorySGX38 hr
Jan 13, 10:21 AM PSTHigh Wind WarningSGX26 hr
Jan 14, 7:45 PM PSTHigh Wind WatchSGX17 hr
Jan 15, 1:09 PM PSTHigh Wind WarningSGX47 hr
Jan 15, 1:09 PM PSTWind AdvisorySGX3 days
Jan 25, 1:32 PM PSTFlash Flood WatchSGX67 hr
Jan 26, 1:02 PM PSTWind AdvisorySGX33 hr
Feb 3, 2:38 AM PSTWind AdvisorySGX14 hr
Feb 5, 3:20 AM PSTWind AdvisorySGX6 hr
Feb 13, 4:26 AM PSTHigh Wind WatchSGX13 hr
Feb 13, 5:02 PM PSTHigh Wind WarningSGX10 hr
Feb 14, 1:02 PM PSTHigh Wind WarningSGX23 hr
Feb 23, 3:27 AM PSTFlash Flood WatchSGX30 hr
Feb 26, 2:16 AM PSTWind AdvisorySGX10 hr
Mar 1, 12:06 PM PSTHigh Wind WatchSGX21 hr
Mar 2, 3:28 AM PSTHigh Wind WarningSGX34 hr
Mar 5, 3:45 AM PSTWind AdvisorySGX24 hr
Mar 8, 1:33 PM PSTWind AdvisorySGX22 hr
Mar 14, 1:59 PM PDTWind AdvisorySGX30 hr
Mar 16, 8:43 PM PDTWind AdvisorySGX16 hr
Apr 11, 1:33 PM PDTWind AdvisorySGX24 hr
Apr 30, 5:56 AM PDTDense Fog AdvisorySGX4 hr
May 6, 10:38 PM PDTDense Fog AdvisorySGX10 hr
May 22, 12:01 PM PDTFlash Flood WarningSGX59 min
May 22, 12:55 PM PDTFlash Flood WarningSGX2 hr
May 22, 6:10 PM PDTFlash Flood WarningSGX104 min
May 22, 6:18 PM PDTFlash Flood WarningSGX87 min
May 23, 1:53 PM PDTDense Fog AdvisorySGX19 hr
Oct 11, 9:02 AM PDTFire Weather WatchSGX19 hr
Oct 12, 2:56 AM PDTHigh Wind WarningSGX57 hr
Oct 12, 2:56 AM PDTWind AdvisorySGX57 hr
Oct 12, 3:45 AM PDTRed Flag WarningSGX6 days
Oct 14, 11:57 AM PDTWind AdvisorySGX7 hr
Oct 21, 8:48 AM PDTRed Flag WarningSGX8 days
Oct 21, 9:07 PM PDTWind AdvisorySGX20 hr
Nov 11, 12:54 PM PSTFire Weather WatchSGX48 hr
Nov 13, 12:55 PM PSTRed Flag WarningSGX3 days
Nov 13, 1:17 PM PSTHigh Wind WatchSGX14 hr
Nov 13, 1:17 PM PSTWind AdvisorySGX49 hr
Nov 14, 5:45 AM PSTHigh Wind WarningSGX32 hr
Nov 24, 1:00 PM PSTFlash Flood WatchSGX3 days
Nov 25, 10:00 PM PSTMesoscale DiscussionSPC2 hr
Nov 26, 12:40 AM PSTFlash Flood WarningSGX5 hr
Nov 26, 12:55 AM PSTAreal Flood AdvisorySGX5 hr
Dec 1, 6:13 PM PSTDense Fog AdvisorySGX15 hr
Dec 4, 1:55 AM PSTDense Fog AdvisorySGX5 hr
Dec 5, 6:44 AM PSTWind AdvisorySGX7 hr
Dec 8, 1:19 PM PSTHigh Wind WatchSGX7 hr
Dec 8, 1:39 PM PSTWind AdvisorySGX32 hr
Dec 8, 8:32 PM PSTHigh Wind WarningSGX21 hr
Dec 10, 7:15 AM PSTWind AdvisorySGX6 hr
Dec 14, 5:33 AM PSTFlash Flood WatchSGX36 hr
Dec 15, 6:42 AM PSTFlash Flood WarningSGX6 hr
Dec 15, 7:11 AM PSTAreal Flood AdvisorySGX5 hr
Dec 15, 10:14 AM PSTFlash Flood WarningSGX3 hr
Dec 15, 10:30 AM PSTAreal Flood AdvisorySGX3 hr
Dec 15, 1:47 PM PSTAreal Flood AdvisorySGX88 min
Dec 15, 6:16 PM PSTFlash Flood WatchSGX6 hr
Dec 16, 9:14 AM PSTFlash Flood WatchSGX35 hr
Dec 17, 8:39 AM PSTWind AdvisorySGX10 hr
Dec 17, 12:35 PM PSTHigh Wind WarningSGX6 hr
Dec 23, 4:48 AM PSTFlash Flood WatchSGX43 hr
Dec 25, 4:32 PM PSTAreal Flood AdvisorySGX98 min

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 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.