Alert archive / Idaho / Elmore County
Weather alerts in Elmore County, Idaho, 2018
59 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Elmore County and its neighbors
Each county as a circle sized by its count in 2018. Tap one for its archive.
- Alerts
- 59
- Warnings
- 13
- Watches
- 10
- Advisories
- 25
- Busiest month
- August10 alerts
- Busiest day
- April 11, 20183 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Elmore County, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 1 | 1 | 0% | 0 | ||
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Boise, ID: severe thunderstorm warnings | 40 | 6 | 85% | 16 | 44% | 24 min |
| NWS Boise, ID: flash flood warnings | 1 | 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 7, 1:23 AM MST | Dense Fog Advisory | BOI | 37 hr |
| Jan 20, 1:39 PM MST | Winter Weather Advisory | BOI | 45 hr |
| Jan 26, 3:51 AM MST | Winter Weather Advisory | BOI | 49 hr |
| Jan 28, 5:38 AM MST | Dense Fog Advisory | BOI | 5 hr |
| Jan 28, 9:15 PM MST | Dense Fog Advisory | BOI | 15 hr |
| Feb 21, 2:25 PM MST | Winter Weather Advisory | BOI | 22 hr |
| Feb 23, 3:11 AM MST | Winter Storm Watch | BOI | 11 hr |
| Feb 23, 1:59 PM MST | Winter Weather Advisory | BOI | 30 hr |
| Feb 24, 9:01 PM MST | Winter Storm Warning | BOI | 36 hr |
| Feb 24, 9:01 PM MST | Winter Weather Advisory | BOI | 41 hr |
| Feb 27, 1:20 PM MST | Winter Storm Watch | BOI | 15 hr |
| Feb 28, 3:52 AM MST | Winter Weather Advisory | BOI | 31 hr |
| Feb 28, 4:04 AM MST | Winter Storm Warning | BOI | 55 hr |
| Mar 12, 2:29 PM MDT | Wind Advisory | BOI | 34 hr |
| Mar 15, 2:02 PM MDT | Winter Weather Advisory | BOI | 68 hr |
| Mar 17, 4:32 PM MDT | Special Weather Statement | BOI | 28 min |
| Mar 31, 1:59 PM MDT | Wind Advisory | BOI | 54 hr |
| Apr 5, 2:27 PM MDT | Flood Watch | BOI | 56 hr |
| Apr 6, 3:04 AM MDT | Wind Advisory | BOI | 42 hr |
| Apr 7, 2:42 PM MDT | Severe Thunderstorm Warning | BOI | 48 min |
| Apr 7, 5:33 PM MDT | Special Weather Statement | BOI | 57 min |
| Apr 11, 3:42 AM MDT | High Wind Watch | BOI | 11 hr |
| Apr 11, 2:19 PM MDT | High Wind Warning | BOI | 26 hr |
| Apr 11, 2:19 PM MDT | Wind Advisory | BOI | 31 hr |
| May 6, 5:27 PM MDT | Special Weather Statement | BOI | 33 min |
| May 15, 4:04 PM MDT | Special Weather Statement | BOI | 41 min |
| May 20, 8:35 PM MDT | Areal Flood Advisory | BOI | 104 min |
| May 25, 7:52 PM MDT | Special Weather Statement | BOI | 53 min |
| May 26, 12:07 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 31, 12:33 PM MDT | Mesoscale Discussion | SPC | 117 min |
| Jun 9, 4:54 PM MDT | Special Weather Statement | BOI | 21 min |
| Jun 20, 9:35 PM MDT | Special Weather Statement | BOI | 40 min |
| Jul 29, 2:05 PM MDT | Excessive Heat Watch | BOI | 23 hr |
| Jul 30, 12:52 PM MDT | Heat Advisory | BOI | 35 hr |
| Aug 1, 2:39 PM MDT | Fire Weather Watch | BOI | 17 hr |
| Aug 2, 8:00 AM MDT | Red Flag Warning | BOI | 13 hr |
| Aug 3, 8:23 AM MDT | Red Flag Warning | BOI | 13 hr |
| Aug 8, 1:30 PM MDT | Fire Weather Watch | BOI | 24 hr |
| Aug 8, 8:31 PM MDT | Excessive Heat Warning | BOI | 51 hr |
| Aug 9, 1:28 PM MDT | Red Flag Warning | BOI | 35 hr |
| Aug 15, 2:03 PM MDT | Fire Weather Watch | BOI | 24 hr |
| Aug 16, 8:08 AM MDT | Red Flag Warning | BOI | 40 hr |
| Aug 17, 1:41 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 19, 1:40 PM MDT | Red Flag Warning | BOI | 30 hr |
| Sep 9, 1:05 PM MDT | Red Flag Warning | BOI | 30 hr |
| Sep 17, 8:40 AM MDT | Red Flag Warning | BOI | 11 hr |
| Oct 11, 9:43 AM MDT | Frost Advisory | BOI | 24 hr |
| Oct 13, 2:32 AM MDT | Freeze Watch | BOI | 11 hr |
| Oct 13, 2:32 AM MDT | Wind Advisory | BOI | 18 hr |
| Oct 13, 1:45 PM MDT | Freeze Warning | BOI | 20 hr |
| Nov 21, 2:38 PM MST | Winter Storm Watch | BOI | 18 hr |
| Nov 22, 8:58 AM MST | Winter Weather Advisory | BOI | 44 hr |
| Nov 22, 10:59 PM MST | Special Weather Statement | BOI | 61 min |
| Nov 29, 3:38 AM MST | Dense Fog Advisory | BOI | 7 hr |
| Nov 30, 2:55 PM MST | Winter Weather Advisory | BOI | 19 hr |
| Dec 1, 2:14 PM MST | Winter Weather Advisory | BOI | 21 hr |
| Dec 2, 9:18 PM MST | Dense Fog Advisory | BOI | 7 hr |
| Dec 10, 2:53 PM MST | Winter Weather Advisory | BOI | 42 hr |
| Dec 24, 10:34 PM MST | Dense Fog Advisory | BOI | 12 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 | 3 |
| Special Weather Statement | 8 |
| Flooding | |
| Flood Watch | 1 |
| Areal Flood Advisory | 1 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 11 |
| Heat | |
| Excessive Heat Warning | 1 |
| Excessive Heat Watch | 1 |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Frost Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 5 |
| Fire | |
| Red Flag Warning | 7 |
| Fire Weather Watch | 3 |
| Fog and smoke | |
| Dense Fog Advisory | 6 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20172019
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.