Alert archive / Idaho / Valley County
Weather alerts in Valley County, Idaho, 2015
38 weather alerts in 2015, 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 2015. Tap one for its archive.
- Alerts
- 38
- Warnings
- 12
- Watches
- 13
- Advisories
- 11
- Busiest month
- August12 alerts
- Busiest day
- June 29, 20152 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, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 0 | 0 | ||||
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Boise, ID: severe thunderstorm warnings | 22 | 5 | 77% | 15 | 40% | 19 min |
| NWS Boise, ID: flash flood warnings | 6 | 1 | 83% | 1 | 100% | 131 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 3, 2:14 PM MST | Winter Weather Advisory | BOI | 45 hr |
| Jan 6, 2:03 PM MST | Dense Fog Advisory | BOI | 59 hr |
| Jan 15, 2:55 PM MST | Winter Weather Advisory | BOI | 23 hr |
| Jan 16, 3:03 PM MST | Winter Weather Advisory | BOI | 35 hr |
| Feb 6, 10:31 AM MST | Flood Watch | BOI | 40 hr |
| Mar 24, 2:35 AM MDT | Winter Weather Advisory | BOI | 9 hr |
| May 12, 12:53 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 20, 3:13 AM MDT | Flash Flood Watch | BOI | 7 hr |
| May 22, 7:03 PM MDT | Areal Flood Advisory | BOI | 117 min |
| Jun 5, 5:09 PM MDT | Areal Flood Advisory | BOI | 111 min |
| Jun 9, 5:18 PM MDT | Areal Flood Advisory | BOI | 3 hr |
| Jun 29, 8:36 AM MDT | Red Flag Warning | BOI | 15 hr |
| Jun 29, 1:54 PM MDT | Mesoscale Discussion | SPC | 96 min |
| Jul 8, 3:01 PM MDT | Flash Flood Warning | BOI | 119 min |
| Jul 10, 2:44 PM MDT | Flash Flood Watch | BOI | 9 hr |
| Jul 11, 3:21 AM MDT | Flash Flood Watch | BOI | 18 hr |
| Aug 1, 2:17 PM MDT | Fire Weather Watch | BOI | 24 hr |
| Aug 4, 8:57 AM MDT | Red Flag Warning | BOI | 34 hr |
| Aug 9, 10:37 AM MDT | Fire Weather Watch | BOI | 4 hr |
| Aug 9, 2:36 PM MDT | Red Flag Warning | BOI | 30 hr |
| Aug 12, 3:32 PM MDT | Fire Weather Watch | BOI | 17 hr |
| Aug 13, 8:38 AM MDT | Fire Weather Watch | BOI | 7 hr |
| Aug 13, 8:38 AM MDT | Red Flag Warning | BOI | 20 hr |
| Aug 14, 4:20 AM MDT | Red Flag Warning | BOI | 20 hr |
| Aug 19, 6:02 PM MDT | Fire Weather Watch | PIH | 18 hr |
| Aug 20, 12:30 PM MDT | Red Flag Warning | PIH | 33 hr |
| Aug 28, 3:35 AM MDT | Fire Weather Watch | PIH | 11 hr |
| Aug 28, 2:18 PM MDT | Red Flag Warning | PIH | 36 hr |
| Sep 1, 2:14 PM MDT | Red Flag Warning | PIH | 31 hr |
| Dec 8, 1:02 PM MST | Winter Storm Watch | BOI | 15 hr |
| Dec 9, 4:00 AM MST | Winter Weather Advisory | BOI | 40 hr |
| Dec 11, 1:29 PM MST | Winter Storm Watch | BOI | 15 hr |
| Dec 12, 4:28 AM MST | Winter Storm Warning | BOI | 43 hr |
| Dec 16, 2:17 PM MST | Winter Storm Warning | BOI | 63 hr |
| Dec 16, 2:17 PM MST | Winter Weather Advisory | BOI | 37 hr |
| Dec 19, 2:52 PM MST | Winter Storm Watch | BOI | 24 hr |
| Dec 20, 2:48 AM MST | Winter Weather Advisory | BOI | 4 days |
| Dec 20, 3:13 PM MST | Winter Storm Warning | BOI | 24 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 | |
| Mesoscale Discussion | 2 |
| Flooding | |
| Flash Flood Warning | 1 |
| Flash Flood Watch | 3 |
| Flood Watch | 1 |
| Areal Flood Advisory | 3 |
| Winter | |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 7 |
| Fire | |
| Red Flag Warning | 8 |
| Fire Weather Watch | 6 |
| Fog and smoke | |
| Dense Fog Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20142016
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.