Alert archive / Idaho / Canyon County
Weather alerts in Canyon County, Idaho, 2016
32 weather alerts in 2016, 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 2016. Tap one for its archive.
- Alerts
- 32
- Warnings
- 1
- Watches
- 1
- Advisories
- 24
- Busiest month
- December10 alerts
- Busiest day
- May 7, 20163 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, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 1 | 0 | 100% | 0 | ||
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Boise, ID: tornado warnings | 0 | 1 | 0% | |||
| NWS Boise, ID: severe thunderstorm warnings | 9 | 0 | 100% | 4 | 0% | |
| NWS Boise, ID: flash flood warnings | 6 | 0 | 100% | 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, Mountain Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 5, 2:57 PM MST | Winter Weather Advisory | BOI | 18 hr |
| Jan 7, 2:00 PM MST | Dense Fog Advisory | BOI | 21 hr |
| Jan 8, 2:17 PM MST | Dense Fog Advisory | BOI | 24 hr |
| Jan 10, 3:33 AM MST | Dense Fog Advisory | BOI | 7 hr |
| Jan 14, 3:14 AM MST | Winter Weather Advisory | BOI | 26 hr |
| Jan 17, 12:41 AM MST | Dense Fog Advisory | BOI | 10 hr |
| Jan 31, 7:06 AM MST | Dense Fog Advisory | BOI | 6 hr |
| Feb 3, 6:01 AM MST | Winter Weather Advisory | BOI | 23 hr |
| Feb 5, 8:47 AM MST | Dense Fog Advisory | BOI | 2 hr |
| Feb 5, 11:11 AM MST | Dense Fog Advisory | BOI | 109 min |
| Feb 5, 8:49 PM MST | Dense Fog Advisory | BOI | 4 hr |
| Feb 19, 4:58 PM MST | Special Weather Statement | BOI | 47 min |
| Mar 21, 7:52 PM MDT | Special Weather Statement | BOI | 38 min |
| Mar 27, 2:32 PM MDT | Wind Advisory | BOI | 54 hr |
| Apr 24, 4:02 AM MDT | Wind Advisory | BOI | 41 hr |
| May 6, 6:20 PM MDT | Special Weather Statement | BOI | 40 min |
| May 6, 6:53 PM MDT | Severe Thunderstorm Warning | BOI | 37 min |
| May 6, 9:20 PM MDT | Areal Flood Advisory | BOI | 3 hr |
| Jun 6, 1:55 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 10, 5:55 AM MDT | Special Weather Statement | BOI | 20 min |
| Jul 10, 6:52 AM MDT | Special Weather Statement | BOI | 38 min |
| Oct 10, 1:19 PM MDT | Frost Advisory | BOI | 43 hr |
| Dec 7, 4:35 AM MST | Winter Weather Advisory | BOI | 3 days |
| Dec 10, 2:11 PM MST | Dense Fog Advisory | BOI | 19 hr |
| Dec 12, 2:14 PM MST | Winter Storm Watch | BOI | 23 hr |
| Dec 13, 1:43 PM MST | Winter Weather Advisory | BOI | 45 hr |
| Dec 15, 3:22 PM MST | Winter Weather Advisory | BOI | 20 hr |
| Dec 19, 4:28 AM MST | Winter Weather Advisory | BOI | 34 hr |
| Dec 21, 2:16 AM MST | Dense Fog Advisory | BOI | 33 hr |
| Dec 22, 2:26 PM MST | Winter Weather Advisory | BOI | 51 hr |
| Dec 28, 2:24 PM MST | Dense Fog Advisory | BOI | 16 hr |
| Dec 31, 4:24 AM MST | Dense Fog Advisory | BOI | 5 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 | 1 |
| Mesoscale Discussion | 1 |
| Special Weather Statement | 5 |
| Flooding | |
| Areal Flood Advisory | 1 |
| Winter | |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 8 |
| Cold | |
| Frost Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 12 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20152017
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.