Alert archive / California / Marin County

Weather alerts in Marin County, California, 2008

65 weather alerts in 2008, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Marin County and its neighbors

Each county as a circle sized by its count in 2008. Tap one for its archive.

Alerts
65
Warnings
11
Watches
11
Advisories
42
Busiest month
January18 alerts
Busiest day
January 3, 20084 alerts

Over time

By month

Warning verification

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

Marin County, 2008

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings00
Flash flood warnings20100%0

Each office's whole area, 2008

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 warnings50100%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.

IssuedProductOfficeLasted
Jan 2, 2:08 PM PSTHigh Wind WatchMTR15 hr
Jan 2, 5:43 PM PSTCoastal Flood WatchMTR43 hr
Jan 2, 5:43 PM PSTHigh Surf AdvisoryMTR35 hr
Jan 3, 3:43 AM PSTHigh Wind WarningMTR41 hr
Jan 3, 9:29 AM PSTWind AdvisoryMTR7 hr
Jan 3, 4:56 PM PSTFlash Flood WatchMTR23 hr
Jan 4, 4:17 AM PSTHigh Surf WarningMTR46 hr
Jan 4, 12:25 PM PSTCoastal Flood WarningMTR24 hr
Jan 5, 10:46 AM PSTMesoscale DiscussionSPC119 min
Jan 6, 1:50 AM PSTHigh Surf AdvisoryMTR14 hr
Jan 7, 2:36 PM PSTWind AdvisoryMTR28 hr
Jan 10, 6:10 PM PSTHigh Surf AdvisoryMTR42 hr
Jan 15, 4:24 AM PSTDense Fog AdvisoryMTR7 hr
Jan 24, 1:34 PM PSTFlood WatchMTR36 hr
Jan 24, 1:59 PM PSTWind AdvisoryMTR38 hr
Jan 25, 7:46 PM PSTFlash Flood WarningMTR3 hr
Jan 25, 10:43 PM PSTFlash Flood WarningMTR3 hr
Jan 27, 9:22 PM PSTWind AdvisoryMTR6 hr
Feb 1, 5:28 AM PSTHigh Surf AdvisoryMTR28 hr
Feb 8, 3:28 AM PSTDense Fog AdvisoryMTR7 hr
Feb 21, 2:52 PM PSTHigh Wind WatchMTR22 hr
Feb 22, 1:13 PM PSTHigh Wind WarningMTR39 hr
Feb 22, 1:13 PM PSTWind AdvisoryMTR52 hr
Feb 23, 4:27 AM PSTHigh Surf AdvisoryMTR12 hr
Feb 23, 4:51 PM PSTHigh Surf WarningMTR31 hr
Feb 24, 11:56 PM PSTHigh Surf AdvisoryMTR8 hr
Feb 29, 5:16 AM PSTDense Fog AdvisoryMTR4 hr
Apr 15, 2:09 PM PDTFrost AdvisoryMTR13 hr
Apr 19, 5:50 PM PDTWind AdvisoryMTR4 hr
Apr 20, 3:55 AM PDTFrost AdvisoryMTR29 hr
Apr 24, 12:51 PM PDTFrost AdvisoryMTR15 hr
Apr 29, 8:53 PM PDTFrost AdvisoryMTR11 hr
May 12, 2:08 PM PDTExcessive Heat WatchMTR3 days
May 14, 2:26 PM PDTHeat AdvisoryMTR30 hr
May 15, 3:14 PM PDTHeat AdvisoryMTR29 hr
May 16, 2:42 PM PDTHeat AdvisoryMTR28 hr
May 19, 2:49 PM PDTWind AdvisoryMTR62 hr
Jun 19, 10:45 AM PDTHeat AdvisoryMTR57 hr
Jul 6, 5:00 AM PDTExcessive Heat WatchMTR58 hr
Jul 7, 1:52 PM PDTHeat AdvisoryMTR49 hr
Jul 8, 8:18 AM PDTExcessive Heat WarningMTR67 hr
Jul 9, 2:49 PM PDTHeat AdvisoryMTR37 hr
Oct 8, 10:57 AM PDTFire Weather WatchMTR18 hr
Oct 8, 2:22 PM PDTWind AdvisoryMTR67 hr
Oct 9, 4:57 AM PDTRed Flag WarningMTR5 days
Oct 11, 3:30 AM PDTFrost AdvisoryMTR29 hr
Oct 30, 2:48 AM PDTWind AdvisoryMTR27 hr
Nov 1, 7:45 AM PDTWind AdvisoryMTR15 hr
Nov 12, 11:00 PM PSTDense Fog AdvisoryMTR11 hr
Nov 29, 5:24 AM PSTDense Fog AdvisoryMTR4 hr
Nov 29, 7:33 PM PSTHigh Surf AdvisoryMTR22 hr
Dec 1, 2:04 AM PSTDense Fog AdvisoryMTR8 hr
Dec 3, 3:53 AM PSTDense Fog AdvisoryMTR6 hr
Dec 6, 11:20 PM PSTDense Fog AdvisoryMTR10 hr
Dec 12, 5:12 PM PSTCoastal Flood WatchMTR8 hr
Dec 13, 1:17 AM PSTCoastal Flood AdvisoryMTR15 hr
Dec 16, 12:50 AM PSTWinter Weather AdvisoryMTR15 hr
Dec 16, 4:21 AM PSTFreeze WatchMTR10 hr
Dec 16, 2:14 PM PSTFrost AdvisoryMTR19 hr
Dec 16, 2:14 PM PSTFreeze WarningMTR19 hr
Dec 17, 2:09 PM PSTFreeze WarningMTR18 hr
Dec 23, 5:44 PM PSTWind AdvisoryMTR27 hr
Dec 24, 2:55 PM PSTCoastal Flood WatchMTR6 hr
Dec 24, 8:44 PM PSTHigh Surf AdvisoryMTR46 hr
Dec 31, 12:29 AM PSTDense Fog AdvisoryMTR12 hr

By product

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

ProductAlerts
Severe storms
Mesoscale Discussion1
Flooding
Flash Flood Warning2
Flash Flood Watch1
Flood Watch1
Winter
Winter Weather Advisory1
Heat
Excessive Heat Warning1
Excessive Heat Watch2
Heat Advisory6
Cold
Freeze Warning2
Freeze Watch1
Frost Advisory6
Wind and dust
High Wind Warning2
High Wind Watch2
Wind Advisory11
Fire
Red Flag Warning1
Fire Weather Watch1
Fog and smoke
Dense Fog Advisory9
Coast and beach
Coastal Flood Warning1
High Surf Warning2
Coastal Flood Watch3
Coastal Flood Advisory1
High Surf Advisory8

The busiest days

Days with the most alerts issued, by UTC date.

  1. January 3, 20084alerts
  2. December 16, 20084alerts
  3. January 4, 20083alerts
  4. January 24, 20082alerts
  5. January 26, 20082alerts
  6. February 22, 20082alerts
  7. April 20, 20082alerts
  8. October 8, 20082alerts
  9. December 13, 20082alerts
  10. December 24, 20082alerts

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.