Alert archive / Idaho / Boise County
Weather alerts in Boise County, Idaho, 2024
100 weather alerts in 2024, 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 2024. Tap one for its archive.
- Alerts
- 100
- Warnings
- 40
- Watches
- 18
- Advisories
- 17
- Busiest month
- August23 alerts
- Busiest day
- June 26, 20247 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Boise County, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 13 | 4 | 69% | 4 | 75% | 27 min |
| Flash flood warnings | 0 | 3 | 0% |
Each office's whole area, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Boise, ID: severe thunderstorm warnings | 45 | 9 | 80% | 46 | 39% | 24 min |
| NWS Boise, ID: flash flood warnings | 7 | 0 | 100% | 3 | 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 6, 2:21 PM MST | Winter Storm Watch | BOI | 28 hr |
| Jan 7, 6:17 PM MST | Winter Storm Warning | BOI | 65 hr |
| Jan 10, 2:37 PM MST | Winter Storm Warning | BOI | 4 days |
| Jan 12, 2:08 PM MST | Winter Weather Advisory | BOI | 39 hr |
| Jan 15, 1:50 PM MST | Winter Weather Advisory | BOI | 4 days |
| Jan 17, 12:49 PM MST | Mesoscale Discussion | SPC | 4 hr |
| Feb 13, 2:20 PM MST | Winter Weather Advisory | BOI | 63 hr |
| Feb 23, 2:01 PM MST | Winter Storm Watch | BOI | 24 hr |
| Feb 24, 2:06 PM MST | Winter Weather Advisory | BOI | 54 hr |
| Feb 28, 2:48 AM MST | Winter Weather Advisory | BOI | 4 days |
| Feb 28, 2:53 AM MST | Wind Advisory | BOI | 41 hr |
| Mar 2, 5:02 AM MST | Special Weather Statement | BOI | 43 min |
| Mar 3, 2:15 PM MST | Winter Storm Watch | BOI | 13 hr |
| Mar 4, 3:07 AM MST | Winter Weather Advisory | BOI | 44 hr |
| Apr 3, 3:31 PM MDT | Mesoscale Discussion | SPC | 89 min |
| Apr 3, 5:24 PM MDT | Severe Thunderstorm Warning | BOI | 36 min |
| Apr 3, 5:55 PM MDT | Special Weather Statement | BOI | 50 min |
| Apr 4, 5:29 PM MDT | Special Weather Statement | BOI | 46 min |
| Apr 4, 6:07 PM MDT | Special Weather Statement | BOI | 68 min |
| Apr 12, 3:42 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 13, 2:58 PM MDT | Special Weather Statement | BOI | 47 min |
| May 22, 1:13 PM MDT | Special Weather Statement | BOI | 47 min |
| May 28, 1:13 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| May 28, 6:11 PM MDT | Severe Thunderstorm Warning | BOI | 49 min |
| May 28, 6:43 PM MDT | Special Weather Statement | BOI | 47 min |
| Jun 2, 1:31 PM MDT | Flood Watch | BOI | 29 hr |
| Jun 9, 12:56 AM MDT | Special Weather Statement | BOI | 34 min |
| Jun 26, 1:47 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 26, 2:35 PM MDT | Severe Thunderstorm Warning | BOI | 40 min |
| Jun 26, 3:03 PM MDT | Severe Thunderstorm Warning | BOI | 42 min |
| Jun 26, 3:42 PM MDT | Severe Thunderstorm Warning | BOI | 48 min |
| Jun 26, 3:46 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 26, 4:25 PM MDT | Severe Thunderstorm Warning | BOI | 35 min |
| Jun 26, 5:07 PM MDT | Special Weather Statement | BOI | 53 min |
| Jun 26, 6:46 PM MDT | Special Weather Statement | BOI | 59 min |
| Jun 26, 6:51 PM MDT | Mesoscale Discussion | SPC | 114 min |
| Jun 26, 6:56 PM MDT | Severe Thunderstorm Warning | BOI | 64 min |
| Jun 26, 7:37 PM MDT | Severe Thunderstorm Warning | BOI | 17 min |
| Jul 3, 2:34 PM MDT | Excessive Heat Watch | BOI | 8 days |
| Jul 10, 12:20 PM MDT | Red Flag Warning | PIH | 33 hr |
| Jul 11, 1:21 PM MDT | Fire Weather Watch | BOI | 49 hr |
| Jul 12, 3:03 AM MDT | Red Flag Warning | PIH | 18 hr |
| Jul 23, 8:29 AM MDT | Red Flag Warning | BOI | 40 hr |
| Jul 23, 2:28 PM MDT | Red Flag Warning | PIH | 31 hr |
| Jul 24, 5:20 PM MDT | Severe Thunderstorm Warning | BOI | 40 min |
| Jul 24, 5:23 PM MDT | Severe Thunderstorm Warning | BOI | 38 min |
| Jul 25, 1:27 PM MDT | Red Flag Warning | PIH | 33 hr |
| Jul 31, 1:47 PM MDT | Heat Advisory | BOI | 3 days |
| Aug 1, 1:58 PM MDT | Fire Weather Watch | BOI | 24 hr |
| Aug 2, 1:44 PM MDT | Red Flag Warning | BOI | 42 hr |
| Aug 4, 2:10 PM MDT | Red Flag Warning | BOI | 31 hr |
| Aug 5, 12:37 AM MDT | Red Flag Warning | PIH | 27 hr |
| Aug 5, 2:35 PM MDT | Mesoscale Discussion | SPC | 115 min |
| Aug 5, 5:05 PM MDT | Special Weather Statement | BOI | 40 min |
| Aug 6, 3:36 AM MDT | Red Flag Warning | PIH | 17 hr |
| Aug 6, 9:32 PM MDT | Red Flag Warning | PIH | 23 hr |
| Aug 9, 2:24 PM MDT | Red Flag Warning | PIH | 31 hr |
| Aug 10, 9:28 AM MDT | Special Weather Statement | BOI | 47 min |
| Aug 11, 2:18 PM MDT | Fire Weather Watch | BOI | 18 hr |
| Aug 12, 7:56 AM MDT | Red Flag Warning | BOI | 37 hr |
| Aug 14, 8:42 AM MDT | Red Flag Warning | BOI | 37 hr |
| Aug 14, 1:58 PM MDT | Red Flag Warning | PIH | 31 hr |
| Aug 15, 2:35 PM MDT | Fire Weather Watch | BOI | 23 hr |
| Aug 15, 3:52 PM MDT | Special Weather Statement | BOI | 38 min |
| Aug 16, 1:28 PM MDT | Red Flag Warning | BOI | 33 hr |
| Aug 18, 1:40 PM MDT | Red Flag Warning | PIH | 8 hr |
| Aug 20, 2:05 PM MDT | Fire Weather Watch | BOI | 24 hr |
| Aug 21, 1:45 PM MDT | Red Flag Warning | PIH | 31 hr |
| Aug 21, 1:56 PM MDT | Red Flag Warning | BOI | 31 hr |
| Aug 31, 1:59 PM MDT | Fire Weather Watch | BOI | 24 hr |
| Aug 31, 2:22 PM MDT | Fire Weather Watch | PIH | 24 hr |
| Sep 1, 2:06 PM MDT | Red Flag Warning | BOI | 34 hr |
| Sep 1, 2:33 PM MDT | Red Flag Warning | PIH | 50 hr |
| Sep 2, 2:56 PM MDT | Mesoscale Discussion | SPC | 94 min |
| Sep 2, 6:49 PM MDT | Severe Thunderstorm Warning | BOI | 26 min |
| Sep 2, 7:14 PM MDT | Severe Thunderstorm Warning | BOI | 46 min |
| Sep 2, 7:16 PM MDT | Special Weather Statement | BOI | 44 min |
| Sep 2, 7:58 PM MDT | Severe Thunderstorm Warning | BOI | 32 min |
| Sep 2, 8:41 PM MDT | Special Weather Statement | BOI | 49 min |
| Sep 3, 8:14 AM MDT | Red Flag Warning | BOI | 11 hr |
| Sep 9, 2:34 PM MDT | Fire Weather Watch | BOI | 24 hr |
| Sep 10, 1:24 PM MDT | Red Flag Warning | PIH | 31 hr |
| Sep 10, 2:18 PM MDT | Red Flag Warning | BOI | 31 hr |
| Sep 11, 2:26 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 11, 4:16 PM MDT | Special Weather Statement | BOI | 44 min |
| Oct 2, 1:47 PM MDT | Fire Weather Watch | BOI | 24 hr |
| Oct 2, 8:50 PM MDT | Fire Weather Watch | PIH | 16 hr |
| Oct 3, 12:59 PM MDT | Red Flag Warning | PIH | 37 hr |
| Oct 3, 1:19 PM MDT | Red Flag Warning | BOI | 32 hr |
| Nov 7, 2:06 PM MST | Air Stagnation Advisory | BOI | 4 days |
| Nov 19, 1:34 PM MST | Winter Weather Advisory | BOI | 39 hr |
| Nov 27, 2:39 AM MST | Dense Fog Advisory | BOI | 3 hr |
| Nov 28, 2:15 PM MST | Air Stagnation Advisory | BOI | 9 days |
| Dec 9, 3:14 AM MST | Air Stagnation Advisory | BOI | 4 days |
| Dec 12, 1:22 PM MST | Winter Storm Watch | BOI | 25 hr |
| Dec 13, 2:01 PM MST | Winter Weather Advisory | BOI | 39 hr |
| Dec 15, 1:55 PM MST | Winter Weather Advisory | BOI | 39 hr |
| Dec 24, 2:24 PM MST | Winter Storm Watch | BOI | 23 hr |
| Dec 25, 1:30 PM MST | Winter Weather Advisory | BOI | 49 hr |
| Dec 28, 12:50 AM MST | Winter Weather Advisory | BOI | 40 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 | 13 |
| Severe Thunderstorm Watch | 1 |
| Mesoscale Discussion | 9 |
| Special Weather Statement | 16 |
| Flooding | |
| Flood Watch | 1 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 5 |
| Winter Weather Advisory | 11 |
| Heat | |
| Excessive Heat Watch | 1 |
| Heat Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 1 |
| Fire | |
| Red Flag Warning | 25 |
| Fire Weather Watch | 10 |
| Fog and smoke | |
| Air Stagnation Advisory | 3 |
| Dense Fog Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20232025
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.