Alert archive / Idaho / Valley County

Weather alerts in Valley County, Idaho, 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.

Valley County and its neighbors

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

Alerts
71
Warnings
27
Watches
22
Advisories
19
Busiest month
December17 alerts
Busiest day
January 9, 20082 alerts

Over time

By month

Warning verification

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

Valley County, 2008

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings00
Flash flood warnings110%2100%55 min

Each office's whole area, 2008

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Boise, ID: tornado warnings110%1100%37 min
NWS Boise, ID: severe thunderstorm warnings21957%2962%16 min
NWS Boise, ID: flash flood warnings2150%2100%55 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, Mountain Time. Each opens its own page with the text, the map, the radar and the sounding.

IssuedProductOfficeLasted
Jan 2, 2:15 PM MSTWinter Storm WatchBOI24 hr
Jan 3, 2:39 PM MSTWinter Storm WarningBOI44 hr
Jan 6, 12:04 PM MSTWinter Storm WatchBOI34 hr
Jan 7, 3:16 PM MSTWinter Storm WarningBOI36 hr
Jan 9, 3:44 AM MSTWinter Storm WatchBOI10 hr
Jan 9, 1:46 PM MSTSnow AdvisoryBOI19 hr
Jan 25, 3:30 PM MSTWinter Storm WarningBOI68 hr
Jan 28, 2:36 PM MSTHeavy Snow WarningBOI32 hr
Jan 30, 4:08 AM MSTWinter Storm WatchBOI7 hr
Jan 30, 11:27 AM MSTWinter Storm WarningBOI36 hr
Feb 1, 3:34 PM MSTWinter Storm WatchBOI6 hr
Feb 1, 9:32 PM MSTWinter Storm WarningBOI40 hr
Feb 4, 2:54 PM MSTWinter Storm WatchBOI12 hr
Feb 5, 3:23 AM MSTWinter Storm WarningBOI25 hr
Feb 6, 10:13 AM MSTWinter Storm WarningBOI28 hr
Feb 22, 7:42 PM MSTSnow AdvisoryBOI9 hr
Feb 24, 2:50 AM MSTSnow AdvisoryBOI8 hr
Feb 29, 2:25 PM MSTSnow AdvisoryBOI22 hr
Mar 12, 2:42 AM MDTSnow AdvisoryBOI42 hr
Mar 25, 4:14 AM MDTSnow AdvisoryBOI38 hr
Mar 27, 3:35 PM MDTSnow and Blowing Snow AdvisoryBOI32 hr
Mar 30, 2:40 PM MDTSnow AdvisoryBOI15 hr
May 28, 10:06 AM MDTFlash Flood WatchBOI19 hr
Jun 10, 1:43 PM MDTSnow AdvisoryBOI19 hr
Jul 20, 2:42 PM MDTFire Weather WatchBOI37 hr
Jul 21, 3:31 PM MDTFlash Flood WatchBOI26 hr
Jul 22, 12:05 PM MDTFlash Flood WarningBOI115 min
Jul 22, 12:16 PM MDTMesoscale DiscussionSPC89 min
Aug 5, 1:10 PM MDTFire Weather WatchBOI25 hr
Aug 5, 2:31 PM MDTFire Weather WatchPIH38 hr
Aug 6, 1:40 PM MDTRed Flag WarningBOI55 hr
Aug 7, 4:55 AM MDTRed Flag WarningPIH19 hr
Aug 8, 3:06 AM MDTFlash Flood WatchBOI18 hr
Aug 8, 3:39 AM MDTRed Flag WarningPIH20 hr
Aug 9, 2:44 AM MDTRed Flag WarningPIH18 hr
Aug 15, 1:35 PM MDTFire Weather WatchBOI25 hr
Aug 16, 2:55 PM MDTRed Flag WarningBOI54 hr
Aug 18, 3:41 AM MDTFire Weather WatchBOI24 hr
Aug 19, 2:25 AM MDTRed Flag WarningPIH17 hr
Aug 19, 3:48 AM MDTRed Flag WarningBOI11 hr
Aug 24, 2:56 PM MDTRed Flag WarningPIH30 hr
Aug 26, 2:13 PM MDTRed Flag WarningPIH31 hr
Sep 8, 2:00 PM MDTFire Weather WatchPIH19 hr
Sep 9, 8:32 AM MDTRed Flag WarningPIH12 hr
Sep 9, 2:56 PM MDTFire Weather WatchPIH12 hr
Sep 15, 2:47 PM MDTFire Weather WatchBOI23 hr
Sep 16, 2:02 PM MDTRed Flag WarningBOI30 hr
Sep 19, 2:14 PM MDTRed Flag WarningPIH30 hr
Sep 24, 2:01 PM MDTFire Weather WatchPIH14 hr
Sep 25, 3:50 AM MDTRed Flag WarningPIH16 hr
Oct 9, 2:12 PM MDTWind AdvisoryBOI31 hr
Oct 9, 2:12 PM MDTWind AdvisoryBOI55 hr
Nov 3, 9:13 PM MSTWinter Weather AdvisoryBOI17 hr
Nov 30, 8:33 AM MSTDense Fog AdvisoryBOI2 hr
Nov 30, 9:01 PM MSTDense Fog AdvisoryBOI16 hr
Dec 7, 2:53 PM MSTWinter Weather AdvisoryBOI12 hr
Dec 11, 3:50 AM MSTWinter Storm WatchBOI24 hr
Dec 12, 4:12 AM MSTWinter Storm WarningBOI25 hr
Dec 13, 2:44 PM MSTWinter Weather AdvisoryBOI20 hr
Dec 16, 2:40 PM MSTWinter Storm WatchBOI25 hr
Dec 17, 3:45 PM MSTWinter Storm WarningBOI36 hr
Dec 19, 1:32 PM MSTWinter Storm WatchBOI24 hr
Dec 20, 1:09 PM MSTWinter Storm WarningBOI46 hr
Dec 21, 4:47 PM MSTMesoscale DiscussionSPC4 hr
Dec 23, 3:46 AM MSTWinter Storm WatchBOI12 hr
Dec 23, 3:43 PM MSTWinter Storm WarningBOI46 hr
Dec 26, 2:43 AM MSTWinter Weather AdvisoryBOI62 hr
Dec 27, 3:18 AM MSTWinter Storm WarningBOI56 hr
Dec 27, 1:26 PM MSTMesoscale DiscussionSPC3 hr
Dec 29, 2:43 PM MSTWind AdvisoryBOI5 hr
Dec 30, 3:45 PM MSTWinter Weather AdvisoryBOI49 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 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.