Alert archive / Idaho / Elmore County
Weather alerts in Elmore County, Idaho, 2017
84 weather alerts in 2017, 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 2017. Tap one for its archive.
- Alerts
- 84
- Warnings
- 29
- Watches
- 10
- Advisories
- 37
- Busiest month
- January17 alerts
- Busiest day
- August 30, 20174 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, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 7 | 2 | 71% | 6 | 17% | 32 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Boise, ID: severe thunderstorm warnings | 23 | 3 | 87% | 44 | 7% | 17 min |
| NWS Boise, ID: flash flood warnings | 8 | 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 2, 2:31 PM MST | Winter Storm Watch | BOI | 317 days |
| Jan 3, 4:23 AM MST | Winter Storm Warning | BOI | 43 hr |
| Jan 3, 4:23 AM MST | Winter Weather Advisory | BOI | 11 hr |
| Jan 5, 1:34 PM MST | Wind Chill Warning | BOI | 21 hr |
| Jan 6, 2:24 PM MST | Wind Chill Warning | BOI | 19 hr |
| Jan 6, 2:24 PM MST | Winter Storm Warning | BOI | 43 hr |
| Jan 7, 2:30 PM MST | Winter Storm Warning | BOI | 33 hr |
| Jan 7, 2:30 PM MST | Winter Weather Advisory | BOI | 27 hr |
| Jan 9, 3:44 AM MST | Winter Weather Advisory | BOI | 10 hr |
| Jan 9, 2:11 PM MST | Winter Storm Warning | BOI | 51 hr |
| Jan 13, 2:29 PM MST | Dense Fog Advisory | BOI | 19 hr |
| Jan 16, 3:00 PM MST | Winter Storm Watch | BOI | 25 hr |
| Jan 17, 4:49 AM MST | Winter Storm Warning | BOI | 54 hr |
| Jan 17, 4:49 AM MST | Winter Weather Advisory | BOI | 54 hr |
| Jan 22, 2:53 PM MST | Winter Weather Advisory | BOI | 27 hr |
| Jan 25, 5:31 AM MST | Dense Fog Advisory | BOI | 4 hr |
| Jan 26, 9:35 PM MST | Dense Fog Advisory | BOI | 13 hr |
| Jan 31, 8:58 PM MST | Winter Storm Watch | BOI | 41 hr |
| Feb 2, 1:28 PM MST | Winter Storm Warning | BOI | 68 hr |
| Feb 6, 2:56 PM MST | Winter Weather Advisory | BOI | 26 hr |
| Feb 8, 10:46 AM MST | Areal Flood Warning | BOI | 57 hr |
| Feb 8, 11:04 AM MST | Areal Flood Advisory | BOI | 57 hr |
| Feb 15, 4:29 AM MST | Dense Fog Advisory | BOI | 7 hr |
| Feb 23, 8:45 AM MST | Wind Advisory | BOI | 11 hr |
| Mar 8, 12:01 PM MST | Flood Watch | BOI | 20 hr |
| Mar 9, 8:00 AM MST | Areal Flood Advisory | BOI | 36 hr |
| Mar 17, 8:47 AM MDT | Areal Flood Advisory | BOI | 4 days |
| Mar 23, 1:52 PM MDT | Areal Flood Advisory | BOI | 4 days |
| Mar 27, 1:23 PM MDT | Areal Flood Advisory | BOI | 24 hr |
| Mar 28, 1:12 PM MDT | Areal Flood Advisory | BOI | 4 days |
| Mar 28, 1:49 PM MDT | High Wind Watch | BOI | 14 hr |
| Mar 28, 1:49 PM MDT | Wind Advisory | BOI | 58 hr |
| Mar 29, 11:54 AM MDT | High Wind Warning | BOI | 36 hr |
| Apr 1, 1:56 PM MDT | Areal Flood Advisory | BOI | 4 days |
| Apr 5, 1:27 PM MDT | Areal Flood Advisory | BOI | 48 hr |
| Apr 18, 1:01 PM MDT | Special Weather Statement | BOI | 44 min |
| Apr 26, 2:28 PM MDT | Wind Advisory | BOI | 31 hr |
| May 5, 3:16 PM MDT | Mesoscale Discussion | SPC | 119 min |
| May 5, 5:54 PM MDT | Severe Thunderstorm Warning | BOI | 27 min |
| May 7, 11:25 AM MDT | Areal Flood Warning | BOI | 48 hr |
| May 7, 11:56 AM MDT | Areal Flood Warning | BOI | 48 hr |
| May 9, 12:08 PM MDT | Areal Flood Warning | BOI | 4 days |
| May 13, 11:59 AM MDT | Areal Flood Warning | BOI | 48 hr |
| May 16, 6:08 PM MDT | Special Weather Statement | BOI | 52 min |
| May 26, 5:41 PM MDT | Special Weather Statement | BOI | 34 min |
| May 30, 12:41 PM MDT | Areal Flood Advisory | BOI | 48 hr |
| Jun 1, 12:50 PM MDT | Areal Flood Advisory | BOI | 48 hr |
| Jun 1, 5:12 PM MDT | Special Weather Statement | BOI | 33 min |
| Jun 3, 12:58 PM MDT | Areal Flood Advisory | BOI | 4 days |
| Jun 4, 7:13 PM MDT | Severe Thunderstorm Warning | BOI | 47 min |
| Jun 7, 1:42 PM MDT | Areal Flood Advisory | BOI | 48 hr |
| Jun 22, 12:44 PM MDT | Red Flag Warning | BOI | 8 hr |
| Jun 26, 2:12 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 26, 7:37 PM MDT | Severe Thunderstorm Warning | BOI | 24 min |
| Jul 6, 3:12 PM MDT | Heat Advisory | BOI | 3 days |
| Jul 9, 4:20 PM MDT | Special Weather Statement | BOI | 25 min |
| Jul 13, 1:46 PM MDT | Fire Weather Watch | BOI | 25 hr |
| Jul 14, 3:06 PM MDT | Red Flag Warning | BOI | 33 hr |
| Aug 8, 2:21 PM MDT | Fire Weather Watch | BOI | 18 hr |
| Aug 9, 8:13 AM MDT | Red Flag Warning | BOI | 13 hr |
| Aug 21, 3:09 PM MDT | Fire Weather Watch | BOI | 23 hr |
| Aug 22, 2:32 PM MDT | Red Flag Warning | BOI | 33 hr |
| Aug 24, 7:42 PM MDT | Severe Thunderstorm Warning | BOI | 48 min |
| Aug 29, 8:29 AM MDT | Fire Weather Watch | BOI | 24 hr |
| Aug 30, 8:26 AM MDT | Red Flag Warning | BOI | 17 hr |
| Aug 30, 4:22 PM MDT | Special Weather Statement | BOI | 53 min |
| Aug 30, 4:49 PM MDT | Severe Thunderstorm Warning | BOI | 26 min |
| Aug 30, 5:14 PM MDT | Severe Thunderstorm Warning | BOI | 46 min |
| Aug 30, 10:47 PM MDT | Severe Thunderstorm Warning | BOI | 43 min |
| Sep 1, 2:47 PM MDT | Fire Weather Watch | BOI | 24 hr |
| Sep 2, 2:34 PM MDT | Red Flag Warning | BOI | 4 days |
| Oct 7, 2:38 PM MDT | Frost Advisory | BOI | 42 hr |
| Nov 15, 2:55 AM MST | Winter Storm Warning | BOI | 36 hr |
| Nov 23, 12:04 AM MST | Dense Fog Advisory | BOI | 13 hr |
| Nov 27, 2:37 AM MST | Wind Advisory | BOI | 14 hr |
| Dec 3, 4:15 AM MST | Wind Advisory | BOI | 22 hr |
| Dec 12, 1:59 PM MST | Dense Fog Advisory | BOI | 21 hr |
| Dec 22, 11:02 AM MST | Winter Weather Advisory | BOI | 27 hr |
| Dec 23, 7:33 AM MST | Winter Storm Warning | BOI | 3 hr |
| Dec 23, 2:58 PM MST | Winter Weather Advisory | BOI | 43 hr |
| Dec 26, 1:21 AM MST | Dense Fog Advisory | BOI | 12 hr |
| Dec 27, 3:03 PM MST | Winter Weather Advisory | BOI | 41 hr |
| Dec 28, 3:02 AM MST | Dense Fog Advisory | BOI | 8 hr |
| Dec 29, 9:01 PM MST | Winter Weather Advisory | 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 | 7 |
| Mesoscale Discussion | 2 |
| Special Weather Statement | 6 |
| Flooding | |
| Areal Flood Warning | 5 |
| Flood Watch | 1 |
| Areal Flood Advisory | 12 |
| Winter | |
| Winter Storm Warning | 8 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 10 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Wind Chill Warning | 2 |
| Frost Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 5 |
| Fire | |
| Red Flag Warning | 6 |
| Fire Weather Watch | 5 |
| Fog and smoke | |
| Dense Fog Advisory | 8 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20162018
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.