Alert archive / Idaho / Clearwater County

Weather alerts in Clearwater County, Idaho, 2011

77 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Clearwater County and its neighbors

Each county as a circle sized by its count in 2011. Tap one for its archive.

Alerts
77
Warnings
17
Watches
9
Advisories
47
Busiest month
February19 alerts
Busiest day
February 14, 20113 alerts

Over time

By month

Warning verification

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

Clearwater County, 2011

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

Each office's whole area, 2011

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Missoula, MT: severe thunderstorm warnings17947%2560%16 min
NWS Missoula, MT: flash flood warnings40100%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 7, 3:00 AM PSTWinter Weather AdvisoryMSO64 hr
Jan 9, 9:09 AM PSTWinter Storm WarningMSO19 hr
Jan 11, 1:59 PM PSTWind AdvisoryMSO33 hr
Jan 11, 2:00 PM PSTWinter Weather AdvisoryMSO50 hr
Jan 15, 1:10 PM PSTWind AdvisoryMSO24 hr
Jan 16, 8:10 AM PSTAreal Flood AdvisoryMSO48 hr
Jan 16, 2:32 PM PSTWind AdvisoryMSO22 hr
Jan 18, 2:21 AM PSTWinter Weather AdvisoryMSO30 hr
Jan 21, 3:42 PM PSTWind AdvisoryMSO6 hr
Jan 26, 2:47 AM PSTDense Fog AdvisoryMSO9 hr
Jan 27, 2:46 AM PSTDense Fog AdvisoryMSO9 hr
Jan 28, 2:03 PM PSTWinter Weather AdvisoryMSO55 hr
Feb 3, 12:32 PM PSTWinter Weather AdvisoryMSO30 hr
Feb 5, 1:22 PM PSTWind AdvisoryMSO44 hr
Feb 6, 3:13 AM PSTWinter Weather AdvisoryMSO61 hr
Feb 11, 1:03 PM PSTWind AdvisoryMSO44 hr
Feb 14, 2:29 AM PSTWind AdvisoryMSO38 hr
Feb 14, 12:53 PM PSTWinter Storm WarningMSO57 hr
Feb 14, 12:53 PM PSTWinter Weather AdvisoryMSO3 days
Feb 19, 5:14 PM PSTWinter Weather AdvisoryMSO34 hr
Feb 21, 3:31 AM PSTWinter Storm WatchMSO10 hr
Feb 21, 3:31 AM PSTWinter Weather AdvisoryMSO52 hr
Feb 21, 1:36 PM PSTWinter Storm WarningMSO72 hr
Feb 23, 4:18 AM PSTWinter Storm WarningMSO33 hr
Feb 23, 4:18 AM PSTWinter Weather AdvisoryMSO54 hr
Feb 25, 12:22 PM PSTWinter Storm WatchMSO25 hr
Feb 26, 12:57 PM PSTWind AdvisoryMSO56 hr
Feb 26, 12:58 PM PSTWinter Storm WarningMSO3 days
Feb 26, 12:58 PM PSTWinter Weather AdvisoryMSO69 hr
Feb 28, 12:21 PM PSTWinter Storm WarningMSO21 hr
Feb 28, 12:21 PM PSTWinter Weather AdvisoryMSO22 hr
Mar 2, 7:46 AM PSTWind AdvisoryMSO8 hr
Mar 3, 6:18 AM PSTWinter Weather AdvisoryMSO3 hr
Mar 9, 4:12 PM PSTWind AdvisoryMSO24 hr
Mar 21, 2:14 AM PDTWinter Weather AdvisoryMSO33 hr
Mar 29, 1:10 PM PDTWind AdvisoryMSO51 hr
Apr 2, 3:10 PM PDTAreal Flood AdvisoryMSO18 hr
Apr 4, 8:10 AM PDTAreal Flood AdvisoryMSO48 hr
Apr 20, 1:13 PM PDTWinter Weather AdvisoryMSO44 hr
May 15, 8:40 PM PDTAreal Flood WarningMSO24 hr
May 15, 9:24 PM PDTAreal Flood AdvisoryMSO22 hr
May 23, 1:37 PM PDTFlood WatchMSO72 hr
May 25, 2:12 AM PDTWinter Weather AdvisoryMSO54 hr
Jun 1, 3:49 PM PDTSpecial Weather StatementMSO41 min
Jun 6, 9:40 AM PDTFlood WatchMSO71 hr
Jun 7, 1:35 PM PDTAreal Flood WarningMSO24 hr
Jun 22, 5:56 PM PDTSevere Thunderstorm WarningMSO34 min
Jun 29, 11:35 AM PDTMesoscale DiscussionSPC115 min
Jul 16, 1:04 PM PDTMesoscale DiscussionSPC56 min
Jul 19, 1:57 PM PDTSpecial Weather StatementMSO48 min
Aug 24, 2:02 PM PDTFire Weather WatchMSO13 hr
Aug 25, 2:54 AM PDTRed Flag WarningMSO16 hr
Aug 28, 1:52 AM PDTRed Flag WarningMSO26 hr
Nov 3, 1:26 PM PDTWinter Weather AdvisoryMSO46 hr
Nov 9, 1:11 PM PSTWinter Storm WatchMSO22 hr
Nov 10, 11:24 AM PSTWinter Storm WarningMSO45 hr
Nov 11, 3:33 AM PSTWind AdvisoryMSO18 hr
Nov 12, 12:50 PM PSTWinter Weather AdvisoryMSO69 hr
Nov 15, 1:10 PM PSTWinter Storm WatchMSO14 hr
Nov 15, 1:11 PM PSTHigh Wind WatchMSO14 hr
Nov 16, 2:45 AM PSTHigh Wind WarningMSO28 hr
Nov 16, 2:54 AM PSTWinter Storm WarningMSO43 hr
Nov 17, 1:36 PM PSTWinter Weather AdvisoryMSO38 hr
Nov 18, 7:31 AM PSTWinter Storm WarningMSO20 hr
Nov 21, 2:42 AM PSTWinter Storm WarningMSO7 hr
Nov 21, 9:22 AM PSTWind AdvisoryMSO61 hr
Nov 21, 9:27 AM PSTWinter Weather AdvisoryMSO31 hr
Nov 23, 12:43 PM PSTWind AdvisoryMSO39 hr
Nov 28, 1:44 PM PSTWinter Storm WatchMSO14 hr
Nov 29, 3:38 AM PSTWinter Storm WarningMSO36 hr
Nov 29, 3:38 AM PSTWinter Weather AdvisoryMSO36 hr
Dec 9, 1:47 PM PSTDense Fog AdvisoryMSO20 hr
Dec 10, 1:44 PM PSTDense Fog AdvisoryMSO17 hr
Dec 17, 6:35 PM PSTDense Fog AdvisoryMSO9 hr
Dec 20, 1:45 PM PSTWinter Weather AdvisoryMSO24 hr
Dec 27, 1:19 PM PSTWind AdvisoryMSO48 hr
Dec 29, 1:30 PM PSTWinter Weather AdvisoryMSO42 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 archive20102012

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.