Alert archive / Washington / Columbia County

Weather alerts in Columbia County, Washington, 2009

79 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Columbia County and its neighbors

Each county as a circle sized by its count in 2009. Tap one for its archive.

Alerts
79
Warnings
14
Watches
13
Advisories
48
Busiest month
January17 alerts
Busiest day
November 21, 20094 alerts

Over time

By month

Warning verification

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

Columbia County, 2009

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

Each office's whole area, 2009

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Pendleton, OR: tornado warnings010%
NWS Pendleton, OR: severe thunderstorm warnings201335%4262%18 min
NWS Pendleton, OR: flash flood warnings020%

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, 4:42 AM PSTWind AdvisoryPDT16 hr
Jan 1, 9:33 PM PSTAreal Flood AdvisoryPDT153 days
Jan 2, 3:54 AM PSTWinter Weather AdvisoryPDT15 hr
Jan 2, 11:37 AM PSTWinter Storm WarningPDT3 hr
Jan 3, 3:04 PM PSTWinter Storm WatchPDT18 hr
Jan 4, 9:27 AM PSTWinter Storm WarningPDT53 hr
Jan 4, 10:04 PM PSTMesoscale DiscussionSPC4 hr
Jan 6, 1:03 PM PSTFlood WatchPDT48 hr
Jan 6, 5:53 PM PSTWind AdvisoryPDT18 hr
Jan 7, 2:56 PM PSTWind AdvisoryPDT18 hr
Jan 8, 4:16 PM PSTWind AdvisoryPDT6 hr
Jan 13, 9:28 AM PSTAir Stagnation AdvisoryPDT11 days
Jan 14, 11:33 AM PSTDense Fog AdvisoryPDT24 hr
Jan 15, 11:38 AM PSTFreezing Fog AdvisoryPDT7 days
Jan 23, 6:28 AM PSTWinter Weather AdvisoryPDT5 hr
Jan 23, 11:54 AM PSTFreezing Fog AdvisoryPDT22 hr
Jan 24, 10:16 AM PSTWinter Weather AdvisoryPDT29 hr
Feb 6, 10:38 PM PSTDense Fog AdvisoryPDT14 hr
Feb 7, 1:50 PM PSTFreezing Fog AdvisoryPDT22 hr
Feb 8, 2:58 PM PSTFreezing Fog AdvisoryPDT7 hr
Feb 10, 10:16 PM PSTWinter Weather AdvisoryPDT12 hr
Feb 16, 3:34 AM PSTDense Fog AdvisoryPDT6 hr
Feb 19, 7:01 AM PSTFreezing Fog AdvisoryPDT6 hr
Feb 19, 10:30 PM PSTFreezing Fog AdvisoryPDT16 hr
Mar 4, 3:40 AM PSTWinter Storm WatchPDT25 hr
Mar 4, 2:58 PM PSTWinter Storm WarningPDT40 hr
Mar 5, 4:32 AM PSTWinter Weather AdvisoryPDT26 hr
Mar 7, 12:28 PM PSTWind AdvisoryPDT6 hr
Mar 7, 3:06 PM PSTWinter Weather AdvisoryPDT23 hr
Mar 15, 11:28 AM PDTWind AdvisoryPDT9 hr
Mar 23, 2:34 PM PDTWinter Storm WatchPDT20 hr
Mar 24, 10:58 AM PDTWinter Storm WarningPDT41 hr
Mar 28, 3:41 AM PDTWinter Storm WatchPDT5 hr
Mar 28, 3:54 AM PDTWind AdvisoryPDT24 hr
Mar 28, 8:46 AM PDTWinter Storm WarningPDT30 hr
Mar 30, 3:13 PM PDTWind AdvisoryPDT29 hr
Mar 30, 3:20 PM PDTWinter Weather AdvisoryPDT37 hr
Mar 31, 1:37 PM PDTHigh Wind WarningPDT6 hr
Apr 1, 3:45 AM PDTWinter Storm WatchPDT12 hr
Apr 1, 3:38 PM PDTWinter Storm WarningPDT37 hr
Apr 1, 3:38 PM PDTWinter Weather AdvisoryPDT25 hr
Apr 23, 2:36 PM PDTFreeze WarningPDT18 hr
May 12, 3:46 AM PDTWind AdvisoryPDT16 hr
May 18, 5:33 PM PDTSevere Thunderstorm WarningPDT35 min
Jun 4, 8:59 PM PDTAreal Flood AdvisoryPDT7 hr
Jun 5, 8:59 AM PDTFlash Flood WatchPDT14 hr
Jun 7, 3:37 PM PDTSpecial Weather StatementOTX38 min
Jul 5, 4:25 PM PDTMesoscale DiscussionSPC65 min
Jul 16, 2:59 PM PDTHeat AdvisoryPDT53 hr
Jul 20, 2:08 PM PDTHeat AdvisoryPDT61 hr
Jul 26, 2:20 PM PDTHeat AdvisoryPDT9 days
Aug 18, 2:05 PM PDTHeat AdvisoryPDT54 hr
Oct 2, 2:42 PM PDTWinter Storm WatchPDT13 hr
Oct 3, 3:40 AM PDTWinter Weather AdvisoryPDT38 hr
Oct 8, 2:55 PM PDTBlowing Dust AdvisoryPDT23 hr
Oct 9, 3:51 AM PDTFreeze WarningPDT30 hr
Oct 10, 4:05 AM PDTHard Freeze WarningPDT30 hr
Oct 26, 2:10 PM PDTWind AdvisoryPDT7 hr
Oct 26, 2:21 PM PDTWinter Weather AdvisoryPDT27 hr
Nov 5, 3:19 PM PSTWind AdvisoryPDT20 hr
Nov 15, 9:00 AM PSTWind AdvisoryPDT39 hr
Nov 16, 6:10 PM PSTHigh Wind WarningPDT20 hr
Nov 19, 4:26 PM PSTWind AdvisoryPDT20 hr
Nov 21, 4:21 AM PSTHigh Wind WatchPDT11 hr
Nov 21, 4:33 AM PSTWinter Storm WatchPDT11 hr
Nov 21, 3:04 PM PSTWind AdvisoryPDT28 hr
Nov 21, 3:29 PM PSTWinter Storm WarningPDT28 hr
Dec 11, 3:56 AM PSTWinter Storm WatchPDT11 hr
Dec 11, 2:52 PM PSTWinter Storm WarningPDT48 hr
Dec 13, 3:13 PM PSTWinter Storm WatchPDT24 hr
Dec 14, 4:01 AM PSTWinter Weather AdvisoryPDT54 hr
Dec 15, 9:25 AM PSTMesoscale DiscussionSPC4 hr
Dec 15, 12:29 PM PSTFreezing Rain AdvisoryPDT16 hr
Dec 18, 6:57 AM PSTDense Fog AdvisoryPDT3 days
Dec 23, 2:25 PM PSTAir Stagnation AdvisoryPDT7 days
Dec 29, 4:01 AM PSTWinter Weather AdvisoryPDT30 hr
Dec 30, 4:27 AM PSTWinter Storm WatchPDT10 hr
Dec 30, 2:54 PM PSTWinter Weather AdvisoryPDT42 hr
Dec 30, 2:54 PM PSTFreezing Rain AdvisoryPDT28 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 archive20082010

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.