Alert archive / Idaho / Boise County
Weather alerts in Boise County, Idaho, 2010
61 weather alerts in 2010, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Boise County and its neighbors
Each county as a circle sized by its count in 2010. Tap one for its archive.
- Alerts
- 61
- Warnings
- 26
- Watches
- 15
- Advisories
- 9
- Busiest month
- June16 alerts
- Busiest day
- June 4, 20104 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 1 tornado warnings covering Boise County in 2010 had a tornado report inside them.
Boise County, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 6 | 2 | 67% | 1 | 0% | |
| Flash flood warnings | 3 | 0 | 100% | 1 | 0% |
Each office's whole area, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Boise, ID: tornado warnings | 1 | 0 | 100% | 0 | ||
| NWS Boise, ID: severe thunderstorm warnings | 49 | 8 | 84% | 23 | 39% | 19 min |
| NWS Boise, ID: flash flood warnings | 12 | 3 | 75% | 14 | 64% | 36 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 20, 12:00 PM MST | Winter Weather Advisory | BOI | 26 hr |
| Jan 21, 4:10 PM MST | Winter Weather Advisory | BOI | 37 hr |
| Feb 23, 3:12 AM MST | Winter Weather Advisory | BOI | 36 hr |
| Mar 12, 12:21 PM MST | Winter Weather Advisory | BOI | 21 hr |
| Mar 28, 3:27 AM MDT | Winter Storm Watch | BOI | 24 hr |
| Apr 1, 2:56 AM MDT | Winter Storm Watch | BOI | 25 hr |
| Apr 2, 3:32 AM MDT | Winter Weather Advisory | BOI | 26 hr |
| Apr 20, 7:20 PM MDT | Special Weather Statement | BOI | 55 min |
| Apr 27, 5:31 PM MDT | Severe Thunderstorm Warning | BOI | 24 min |
| May 1, 1:57 PM MDT | Wind Advisory | BOI | 70 hr |
| May 17, 7:45 PM MDT | Severe Thunderstorm Warning | BOI | 45 min |
| May 21, 10:30 PM MDT | Winter Weather Advisory | BOI | 29 hr |
| Jun 3, 10:33 AM MDT | Flash Flood Watch | BOI | 26 hr |
| Jun 4, 9:40 AM MDT | Areal Flood Warning | BOI | 12 hr |
| Jun 4, 1:37 PM MDT | Severe Thunderstorm Warning | BOI | 53 min |
| Jun 4, 2:21 PM MDT | Flash Flood Warning | BOI | 60 min |
| Jun 4, 2:55 PM MDT | Tornado Warning | BOI | 50 min |
| Jun 4, 9:15 PM MDT | Areal Flood Warning | BOI | 7 hr |
| Jun 4, 9:59 PM MDT | River Flood Warning | BOI | 14 hr |
| Jun 5, 4:17 AM MDT | Areal Flood Warning | BOI | 6 hr |
| Jun 5, 2:10 PM MDT | Flash Flood Watch | BOI | 31 hr |
| Jun 20, 3:11 AM MDT | Flash Flood Watch | BOI | 18 hr |
| Jun 20, 1:33 PM MDT | Special Weather Statement | BOI | 57 min |
| Jun 20, 2:27 PM MDT | Areal Flood Advisory | BOI | 6 hr |
| Jun 25, 3:21 AM MDT | Flash Flood Watch | BOI | 18 hr |
| Jun 29, 1:41 PM MDT | Mesoscale Discussion | SPC | 64 min |
| Jun 29, 2:31 PM MDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jun 29, 5:46 PM MDT | Mesoscale Discussion | SPC | 89 min |
| Jul 11, 3:02 PM MDT | Red Flag Warning | BOI | 54 hr |
| Jul 23, 2:22 PM MDT | Fire Weather Watch | BOI | 44 hr |
| Jul 25, 4:04 AM MDT | Red Flag Warning | BOI | 4 days |
| Jul 27, 12:20 AM MDT | Flash Flood Watch | BOI | 4 hr |
| Jul 28, 1:23 PM MDT | Mesoscale Discussion | SPC | 67 min |
| Jul 28, 1:41 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 28, 4:33 PM MDT | Special Weather Statement | BOI | 27 min |
| Jul 30, 10:15 AM MDT | Red Flag Warning | BOI | 10 hr |
| Jul 30, 1:53 PM MDT | Mesoscale Discussion | SPC | 67 min |
| Jul 31, 8:55 AM MDT | Red Flag Warning | BOI | 12 hr |
| Jul 31, 12:53 PM MDT | Mesoscale Discussion | SPC | 67 min |
| Aug 5, 2:47 PM MDT | Red Flag Warning | BOI | 31 hr |
| Aug 5, 4:56 PM MDT | Flash Flood Warning | BOI | 2 hr |
| Aug 5, 6:36 PM MDT | Severe Thunderstorm Warning | BOI | 54 min |
| Aug 5, 6:45 PM MDT | Flash Flood Warning | BOI | 2 hr |
| Aug 6, 8:44 PM MDT | Flash Flood Watch | BOI | 5 hr |
| Aug 7, 2:15 PM MDT | Fire Weather Watch | BOI | 23 hr |
| Aug 8, 1:24 PM MDT | Red Flag Warning | BOI | 59 hr |
| Aug 9, 2:48 PM MDT | Red Flag Warning | BOI | 33 hr |
| Aug 9, 9:33 PM MDT | Severe Thunderstorm Warning | BOI | 27 min |
| Aug 10, 4:14 PM MDT | Special Weather Statement | BOI | 46 min |
| Aug 20, 10:09 AM MDT | Fire Weather Watch | BOI | 5 hr |
| Aug 20, 2:42 PM MDT | Red Flag Warning | BOI | 30 hr |
| Aug 21, 9:59 PM MDT | Severe Thunderstorm Warning | BOI | 61 min |
| Aug 21, 11:10 PM MDT | Special Weather Statement | BOI | 50 min |
| Aug 24, 10:16 AM MDT | Red Flag Warning | BOI | 65 hr |
| Nov 9, 2:25 AM MST | Winter Weather Advisory | BOI | 33 hr |
| Nov 18, 2:09 PM MST | Winter Storm Warning | BOI | 5 hr |
| Nov 21, 4:30 AM MST | Winter Storm Watch | BOI | 15 hr |
| Nov 21, 7:58 PM MST | Winter Storm Warning | BOI | 43 hr |
| Nov 22, 7:16 PM MST | Mesoscale Discussion | SPC | 6 hr |
| Dec 26, 2:32 PM MST | Winter Storm Watch | BOI | 48 hr |
| Dec 27, 2:31 PM MST | Winter Storm Warning | BOI | 44 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 archive20092011
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.