Alert archive / Idaho / Ada County
Weather alerts in Ada County, Idaho, 2026
73 weather alerts in 2026, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Ada County and its neighbors
Each county as a circle sized by its count in 2026. Tap one for its archive.
- Alerts
- 73
- Warnings
- 18
- Watches
- 7
- Advisories
- 18
- Busiest month
- July21 alerts
- Busiest day
- May 28, 20265 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Ada County, 2026
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 8 | 5 | 38% | 18 | 78% | 21 min |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2026
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Boise, ID: severe thunderstorm warnings | 46 | 10 | 78% | 43 | 60% | 23 min |
| NWS Boise, ID: flash flood warnings | 13 | 1 | 92% | 3 | 67% | 69 min |
An office's figures cover every county it serves, including across state lines.
The year is still running; reports filed late and damage surveys can still change these figures.
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, 7:14 PM MST | Special Weather Statement | BOI | 46 min |
| Jan 9, 1:27 PM MST | Air Stagnation Advisory | BOI | 15 days |
| Jan 14, 2:01 PM MST | Dense Fog Advisory | BOI | 23 hr |
| Jan 15, 2:14 PM MST | Dense Fog Advisory | BOI | 21 hr |
| Jan 31, 1:35 AM MST | Air Stagnation Advisory | BOI | 7 days |
| Feb 6, 2:13 AM MST | Air Stagnation Advisory | BOI | 55 hr |
| Mar 4, 1:23 AM MST | Wind Advisory | BOI | 43 hr |
| Mar 12, 2:32 AM MDT | High Wind Watch | BOI | 35 hr |
| Mar 13, 1:48 PM MDT | High Wind Warning | BOI | 31 hr |
| Apr 10, 8:16 PM MDT | Special Weather Statement | BOI | 44 min |
| Apr 15, 2:23 AM MDT | Freeze Watch | BOI | 10 hr |
| Apr 15, 12:43 PM MDT | Freeze Warning | BOI | 21 hr |
| Apr 15, 12:43 PM MDT | Freeze Warning | BOI | 45 hr |
| Apr 15, 6:00 PM MDT | Special Weather Statement | BOI | 45 min |
| Apr 15, 6:40 PM MDT | Special Weather Statement | BOI | 50 min |
| Apr 16, 9:36 PM MDT | Freeze Warning | BOI | 35 hr |
| Apr 23, 9:54 PM MDT | Freeze Watch | BOI | 13 hr |
| Apr 24, 10:24 AM MDT | Freeze Warning | BOI | 23 hr |
| May 3, 6:00 PM MDT | Special Weather Statement | BOI | 30 min |
| May 11, 12:11 PM MDT | Wind Advisory | BOI | 58 hr |
| May 12, 9:37 PM MDT | Special Weather Statement | BOI | 38 min |
| May 16, 7:13 PM MDT | Wind Advisory | BOI | 27 hr |
| May 25, 2:42 PM MDT | Special Weather Statement | BOI | 48 min |
| May 25, 3:11 PM MDT | Special Weather Statement | BOI | 34 min |
| May 25, 3:48 PM MDT | Severe Thunderstorm Warning | BOI | 27 min |
| May 25, 4:00 PM MDT | Severe Thunderstorm Warning | BOI | 45 min |
| May 25, 8:37 PM MDT | Special Weather Statement | BOI | 23 min |
| May 25, 9:01 PM MDT | Special Weather Statement | BOI | 29 min |
| May 27, 2:50 PM MDT | Mesoscale Discussion | SPC | 85 min |
| May 28, 1:49 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 28, 3:17 PM MDT | Severe Thunderstorm Warning | BOI | 43 min |
| May 28, 3:38 PM MDT | Severe Thunderstorm Warning | BOI | 37 min |
| May 28, 4:09 PM MDT | Severe Thunderstorm Warning | BOI | 44 min |
| May 28, 4:15 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 28, 6:10 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 10, 12:58 AM MDT | Wind Advisory | BOI | 18 hr |
| Jun 25, 8:24 AM MDT | Fire Weather Watch | BOI | 4 hr |
| Jun 25, 12:53 PM MDT | Red Flag Warning | BOI | 33 hr |
| Jun 26, 8:22 PM MDT | Severe Thunderstorm Warning | BOI | 38 min |
| Jun 26, 8:41 PM MDT | Severe Thunderstorm Warning | BOI | 49 min |
| Jun 26, 9:05 PM MDT | Areal Flood Advisory | BOI | 2 hr |
| Jun 26, 9:26 PM MDT | Special Weather Statement | BOI | 49 min |
| Jul 6, 6:11 PM MDT | Special Weather Statement | BOI | 34 min |
| Jul 6, 6:42 PM MDT | Special Weather Statement | BOI | 33 min |
| Jul 9, 12:56 PM MDT | Heat Advisory | BOI | 56 hr |
| Jul 11, 8:55 PM MDT | Heat Advisory | BOI | 48 hr |
| Jul 15, 12:43 PM MDT | Heat Advisory | BOI | 32 hr |
| Jul 15, 1:14 PM MDT | Red Flag Warning | BOI | 32 hr |
| Jul 16, 5:01 PM MDT | Special Weather Statement | BOI | 44 min |
| Jul 16, 5:43 PM MDT | Special Weather Statement | BOI | 47 min |
| Jul 17, 5:28 AM MDT | Special Weather Statement | BOI | 32 min |
| Jul 17, 5:43 PM MDT | Special Weather Statement | BOI | 32 min |
| Jul 17, 6:11 PM MDT | Special Weather Statement | BOI | 34 min |
| Jul 19, 12:16 AM MDT | Heat Advisory | BOI | 45 hr |
| Jul 22, 1:17 PM MDT | Heat Advisory | BOI | 3 days |
| Jul 22, 2:51 PM MDT | Red Flag Warning | BOI | 30 hr |
| Jul 23, 3:17 PM MDT | Special Weather Statement | BOI | 43 min |
| Jul 23, 7:35 PM MDT | Special Weather Statement | BOI | 40 min |
| Jul 23, 8:05 PM MDT | Special Weather Statement | BOI | 40 min |
| Jul 23, 8:44 PM MDT | Special Weather Statement | BOI | 46 min |
| Jul 23, 8:47 PM MDT | Severe Thunderstorm Warning | BOI | 43 min |
| Jul 23, 9:10 PM MDT | Flash Flood Warning | BOI | 95 min |
| Jul 30, 1:39 AM MDT | Special Weather Statement | BOI | 51 min |
| Aug 5, 12:00 PM MDT | Heat Advisory | BOI | 3 days |
| Aug 11, 1:27 PM MDT | Fire Weather Watch | BOI | 24 hr |
| Aug 12, 1:20 PM MDT | Red Flag Warning | BOI | 3 days |
| Aug 15, 2:45 PM MDT | Special Weather Statement | BOI | 45 min |
| Aug 15, 3:34 PM MDT | Special Weather Statement | BOI | 26 min |
| Aug 15, 3:58 PM MDT | Special Weather Statement | BOI | 47 min |
| Aug 19, 2:17 AM MDT | Heat Advisory | BOI | 67 hr |
| Aug 21, 12:48 PM MDT | Wind Advisory | BOI | 8 hr |
| Aug 21, 2:35 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 18, 10:50 AM MDT | Flash Flood Watch | BOI | 13 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 | 8 |
| Severe Thunderstorm Watch | 1 |
| Mesoscale Discussion | 4 |
| Special Weather Statement | 26 |
| Flooding | |
| Flash Flood Warning | 1 |
| Flash Flood Watch | 1 |
| Areal Flood Advisory | 1 |
| Heat | |
| Heat Advisory | 7 |
| Cold | |
| Freeze Warning | 4 |
| Freeze Watch | 2 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 5 |
| Fire | |
| Red Flag Warning | 4 |
| Fire Weather Watch | 2 |
| Fog and smoke | |
| Air Stagnation Advisory | 3 |
| Dense Fog Advisory | 2 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive2025
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.