Alert archive / Idaho / Canyon County
Weather alerts in Canyon County, Idaho, 2008
48 weather alerts in 2008, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Canyon County and its neighbors
Each county as a circle sized by its count in 2008. Tap one for its archive.
- Alerts
- 48
- Warnings
- 9
- Watches
- 7
- Advisories
- 27
- Busiest month
- December11 alerts
- Busiest day
- June 30, 20083 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Canyon County, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 3 | 1 | 67% | 2 | 0% | |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Boise, ID: tornado warnings | 1 | 1 | 0% | 1 | 100% | 37 min |
| NWS Boise, ID: severe thunderstorm warnings | 21 | 9 | 57% | 29 | 62% | 16 min |
| NWS Boise, ID: flash flood warnings | 2 | 1 | 50% | 2 | 100% | 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.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 2, 12:08 PM MST | High Wind Watch | BOI | 26 hr |
| Jan 3, 2:21 PM MST | Wind Advisory | BOI | 30 hr |
| Jan 6, 12:04 PM MST | Winter Storm Watch | BOI | 34 hr |
| Jan 7, 9:50 PM MST | Snow Advisory | BOI | 25 hr |
| Jan 12, 8:59 PM MST | Dense Fog Advisory | BOI | 17 hr |
| Jan 13, 9:09 PM MST | Dense Fog Advisory | BOI | 10 hr |
| Jan 20, 7:10 PM MST | Dense Fog Advisory | BOI | 11 hr |
| Jan 25, 3:30 PM MST | Snow Advisory | BOI | 68 hr |
| Jan 28, 2:36 PM MST | Snow Advisory | BOI | 32 hr |
| Jan 30, 11:27 AM MST | Snow and Blowing Snow Advisory | BOI | 36 hr |
| Feb 1, 9:32 PM MST | Snow and Blowing Snow Advisory | BOI | 40 hr |
| Feb 6, 10:13 AM MST | Snow Advisory | BOI | 23 hr |
| Apr 14, 6:23 PM MDT | Blowing Dust Advisory | BOI | 2 hr |
| Apr 25, 2:43 PM MDT | Freeze Warning | BOI | 18 hr |
| Apr 29, 3:12 PM MDT | Freeze Watch | BOI | 11 hr |
| Apr 30, 2:22 AM MDT | Freeze Warning | BOI | 31 hr |
| May 1, 3:37 PM MDT | Freeze Warning | BOI | 17 hr |
| May 13, 1:56 PM MDT | Wind Advisory | BOI | 30 hr |
| May 20, 2:46 AM MDT | Wind Advisory | BOI | 41 hr |
| May 20, 5:56 PM MDT | High Wind Warning | BOI | 4 hr |
| May 22, 10:39 AM MDT | Wind Advisory | BOI | 9 hr |
| May 27, 4:23 PM MDT | Mesoscale Discussion | SPC | 97 min |
| Jun 21, 3:45 PM MDT | Mesoscale Discussion | SPC | 60 min |
| Jun 30, 3:05 PM MDT | Mesoscale Discussion | SPC | 85 min |
| Jun 30, 3:33 PM MDT | Severe Thunderstorm Warning | BOI | 42 min |
| Jun 30, 3:52 PM MDT | Severe Thunderstorm Warning | BOI | 38 min |
| Jul 22, 10:35 AM MDT | Severe Thunderstorm Warning | BOI | 25 min |
| Aug 8, 1:55 PM MDT | Mesoscale Discussion | SPC | 95 min |
| Aug 25, 11:07 AM MDT | Wind Advisory | BOI | 13 hr |
| Oct 7, 3:05 PM MDT | Freeze Watch | BOI | 19 hr |
| Oct 8, 10:09 AM MDT | Freeze Warning | BOI | 23 hr |
| Oct 9, 2:12 PM MDT | Wind Advisory | BOI | 31 hr |
| Oct 9, 2:12 PM MDT | Wind Advisory | BOI | 55 hr |
| Nov 22, 10:00 PM MST | Dense Fog Advisory | BOI | 15 hr |
| Nov 23, 1:25 PM MST | Dense Fog Advisory | BOI | 22 hr |
| Nov 24, 12:59 PM MST | Dense Fog Advisory | BOI | 22 hr |
| Nov 30, 8:33 AM MST | Dense Fog Advisory | BOI | 2 hr |
| Nov 30, 9:01 PM MST | Dense Fog Advisory | BOI | 16 hr |
| Dec 1, 4:44 PM MST | Dense Fog Advisory | BOI | 9 hr |
| Dec 12, 3:38 AM MST | Wind Advisory | BOI | 25 hr |
| Dec 16, 2:40 PM MST | Winter Storm Watch | BOI | 25 hr |
| Dec 17, 3:45 PM MST | Winter Weather Advisory | BOI | 42 hr |
| Dec 19, 1:32 PM MST | Winter Storm Watch | BOI | 24 hr |
| Dec 20, 1:09 PM MST | Winter Storm Warning | BOI | 46 hr |
| Dec 21, 4:47 PM MST | Mesoscale Discussion | SPC | 4 hr |
| Dec 23, 3:46 AM MST | Winter Storm Watch | BOI | 12 hr |
| Dec 23, 3:43 PM MST | Winter Weather Advisory | BOI | 36 hr |
| Dec 26, 2:43 AM MST | Winter Weather Advisory | BOI | 62 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 3 |
| Mesoscale Discussion | 5 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 4 |
| Snow Advisory | 4 |
| Snow and Blowing Snow Advisory | 2 |
| Winter Weather Advisory | 3 |
| Cold | |
| Freeze Warning | 4 |
| Freeze Watch | 2 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Blowing Dust Advisory | 1 |
| Wind Advisory | 8 |
| Fog and smoke | |
| Dense Fog Advisory | 9 |
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.