Alert archive / California / Monterey County

Weather alerts in Monterey County, California, 2012

68 weather alerts in 2012, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Monterey County and its neighbors

Each county as a circle sized by its count in 2012. Tap one for its archive.

Alerts
68
Warnings
12
Watches
5
Advisories
35
Busiest month
November13 alerts
Busiest day
November 30, 20125 alerts

Over time

By month

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

Monterey County, 2012

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings00
Flash flood warnings330%367%69 min

Each office's whole area, 2012

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS San Francisco Bay Area, CA: severe thunderstorm warnings30100%10%
NWS San Francisco Bay Area, CA: flash flood warnings17382%1020%69 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 5, 2:40 AM PSTHigh Surf AdvisoryMTR39 hr
Jan 15, 8:08 PM PSTFreeze WatchMTR7 hr
Jan 16, 3:19 AM PSTFreeze WatchMTR24 hr
Jan 16, 3:19 AM PSTFreeze WarningMTR29 hr
Jan 17, 3:22 AM PSTFreeze WarningMTR30 hr
Jan 20, 10:14 AM PSTHigh Surf AdvisoryMTR48 hr
Jan 22, 2:33 AM PSTWind AdvisoryMTR27 hr
Jan 26, 5:04 AM PSTHigh Surf AdvisoryMTR10 hr
Jan 26, 3:16 PM PSTHigh Surf AdvisoryMTR3 hr
Feb 5, 1:55 PM PSTHigh Wind WatchMTR13 hr
Feb 6, 2:53 AM PSTWind AdvisoryMTR31 hr
Feb 7, 1:52 PM PSTHigh Surf AdvisoryMTR25 hr
Feb 13, 9:13 AM PSTHigh Surf AdvisoryMTR30 hr
Feb 29, 4:54 AM PSTHigh Surf AdvisoryMTR28 hr
Mar 5, 2:35 AM PSTWind AdvisoryMTR44 hr
Mar 6, 2:14 PM PSTFreeze WarningMTR15 hr
Mar 7, 5:00 PM PSTFreeze WarningMTR15 hr
Mar 16, 8:50 PM PDTAreal Flood AdvisoryMTR115 min
Mar 16, 11:03 PM PDTAreal Flood AdvisoryMTR87 min
Mar 17, 2:58 AM PDTHigh Surf AdvisoryMTR41 hr
Mar 30, 3:01 AM PDTHigh Surf AdvisoryMTR35 hr
Mar 31, 2:30 PM PDTHigh Surf WarningMTR25 hr
Apr 1, 3:06 PM PDTHigh Surf AdvisoryMTR17 hr
Apr 4, 3:20 AM PDTFrost AdvisoryMTR24 hr
Apr 5, 8:17 PM PDTFrost AdvisoryMTR12 hr
May 16, 11:20 AM PDTBeach Hazards StatementMTR5 days
May 21, 11:27 AM PDTBeach Hazards StatementMTR48 hr
May 23, 11:55 AM PDTBeach Hazards StatementMTR6 days
May 29, 11:31 AM PDTBeach Hazards StatementMTR17 days
Jun 15, 2:24 PM PDTBeach Hazards StatementMTR3 days
Jun 19, 11:09 AM PDTBeach Hazards StatementMTR14 days
Aug 4, 11:08 AM PDTRed Flag WarningMTR7 hr
Aug 29, 6:04 PM PDTBeach Hazards StatementMTR3 days
Sep 3, 3:02 AM PDTDense Fog AdvisoryMTR6 hr
Sep 6, 2:55 PM PDTBeach Hazards StatementMTR3 days
Sep 21, 2:04 PM PDTBeach Hazards StatementMTR4 days
Sep 23, 7:09 AM PDTDense Fog AdvisoryMTR3 hr
Sep 25, 3:29 PM PDTBeach Hazards StatementMTR6 hr
Sep 28, 10:57 AM PDTExcessive Heat WatchMTR40 hr
Sep 28, 2:23 PM PDTBeach Hazards StatementMTR63 hr
Oct 12, 2:52 AM PDTBeach Hazards StatementMTR14 hr
Oct 12, 6:05 PM PDTBeach Hazards StatementMTR14 hr
Oct 15, 9:40 PM PDTBeach Hazards StatementMTR32 hr
Oct 29, 3:16 AM PDTDense Fog AdvisoryMTR5 hr
Oct 29, 8:49 AM PDTBeach Hazards StatementMTR14 hr
Oct 29, 1:20 PM PDTDense Fog AdvisoryMTR20 hr
Nov 5, 9:30 AM PSTCoastal Flood WarningMTR10 min
Nov 5, 9:40 AM PSTBeach Hazards StatementMTR30 hr
Nov 9, 6:42 PM PSTFrost AdvisoryMTR13 hr
Nov 10, 10:13 AM PSTFrost AdvisoryMTR22 hr
Nov 27, 3:39 AM PSTWind AdvisoryMTR34 hr
Nov 29, 3:14 AM PSTHigh Surf AdvisoryMTR54 hr
Nov 29, 11:22 AM PSTFlash Flood WatchMTR3 days
Nov 29, 11:23 AM PSTWind AdvisoryMTR27 hr
Nov 30, 8:27 AM PSTAreal Flood AdvisoryMTR3 hr
Nov 30, 9:29 AM PSTFlash Flood WarningMTR61 min
Nov 30, 10:38 AM PSTFlash Flood WarningMTR82 min
Nov 30, 11:25 AM PSTAreal Flood AdvisoryMTR3 hr
Nov 30, 11:59 AM PSTFlash Flood WarningMTR3 hr
Dec 2, 9:20 AM PSTAreal Flood AdvisoryMTR3 hr
Dec 13, 2:10 PM PSTFrost AdvisoryMTR18 hr
Dec 18, 3:04 AM PSTFrost AdvisoryMTR29 hr
Dec 18, 3:04 AM PSTFreeze WarningMTR29 hr
Dec 19, 2:09 PM PSTFreeze WarningMTR19 hr
Dec 21, 2:51 AM PSTHigh Surf AdvisoryMTR35 hr
Dec 22, 1:41 PM PSTWind AdvisoryMTR24 hr
Dec 23, 8:11 PM PSTAreal Flood AdvisoryMTR94 min
Dec 27, 12:39 PM PSTHigh Surf AdvisoryMTR57 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 archive20112013

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.