Alert archive / Idaho / Lemhi County
Weather alerts in Lemhi County, Idaho, 2018
72 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Lemhi County and its neighbors
Each county as a circle sized by its count in 2018. Tap one for its archive.
- Alerts
- 72
- Warnings
- 15
- Watches
- 4
- Advisories
- 26
- Busiest month
- August22 alerts
- Busiest day
- August 17, 20185 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Lemhi 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% | 2 | 100% | 19 min |
| 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 Missoula, MT: severe thunderstorm warnings | 11 | 9 | 18% | 17 | 76% | 18 min |
| NWS Missoula, MT: 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 5, 12:58 PM MST | Winter Weather Advisory | MSO | 22 hr |
| Jan 10, 2:16 PM MST | Winter Weather Advisory | MSO | 42 hr |
| Jan 17, 1:59 PM MST | Winter Weather Advisory | MSO | 45 hr |
| Feb 16, 2:53 PM MST | Winter Weather Advisory | MSO | 69 hr |
| Feb 22, 7:39 AM MST | Winter Weather Advisory | MSO | 15 hr |
| Feb 22, 11:03 PM MST | Winter Weather Advisory | MSO | 10 hr |
| Feb 24, 6:50 PM MST | Winter Weather Advisory | MSO | 44 hr |
| Mar 1, 3:11 AM MST | Winter Weather Advisory | MSO | 48 hr |
| Mar 2, 8:08 AM MST | Winter Storm Warning | MSO | 2 hr |
| Mar 2, 8:08 AM MST | Winter Weather Advisory | MSO | 14 hr |
| Mar 3, 2:05 PM MST | Winter Weather Advisory | MSO | 24 hr |
| Mar 16, 3:17 AM MDT | Winter Weather Advisory | MSO | 57 hr |
| Mar 24, 5:52 AM MDT | Winter Weather Advisory | MSO | 3 hr |
| Apr 11, 12:48 PM MDT | Winter Weather Advisory | MSO | 29 hr |
| Apr 29, 2:30 PM MDT | Winter Weather Advisory | MSO | 20 hr |
| May 6, 2:50 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 6, 3:21 PM MDT | Special Weather Statement | MSO | 24 min |
| May 11, 2:28 PM MDT | Winter Weather Advisory | MSO | 19 hr |
| May 20, 1:41 PM MDT | Special Weather Statement | MSO | 34 min |
| May 22, 3:22 PM MDT | Areal Flood Advisory | MSO | 113 min |
| May 25, 4:50 PM MDT | Areal Flood Advisory | MSO | 3 hr |
| May 26, 12:07 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 26, 1:18 PM MDT | Special Weather Statement | MSO | 42 min |
| May 26, 2:31 PM MDT | Special Weather Statement | MSO | 44 min |
| May 26, 3:09 PM MDT | Severe Thunderstorm Warning | MSO | 36 min |
| May 30, 1:38 PM MDT | Special Weather Statement | MSO | 37 min |
| May 30, 1:48 PM MDT | Mesoscale Discussion | SPC | 117 min |
| May 31, 12:33 PM MDT | Mesoscale Discussion | SPC | 117 min |
| Jun 7, 1:20 PM MDT | Mesoscale Discussion | SPC | 85 min |
| Jun 8, 2:18 PM MDT | Wind Advisory | MSO | 31 hr |
| Jun 9, 11:54 AM MDT | Winter Weather Advisory | MSO | 48 hr |
| Jun 11, 1:15 PM MDT | Frost Advisory | MSO | 19 hr |
| Jun 28, 2:56 PM MDT | Special Weather Statement | MSO | 34 min |
| Jun 28, 3:04 PM MDT | Special Weather Statement | MSO | 26 min |
| Jul 10, 3:48 AM MDT | Red Flag Warning | PIH | 17 hr |
| Jul 16, 4:15 PM MDT | Special Weather Statement | MSO | 45 min |
| Jul 16, 5:55 PM MDT | Special Weather Statement | MSO | 50 min |
| Jul 16, 8:42 PM MDT | Special Weather Statement | MSO | 48 min |
| Jul 31, 2:51 PM MDT | Red Flag Warning | PIH | 30 hr |
| Jul 31, 8:19 PM MDT | Special Weather Statement | MSO | 41 min |
| Aug 1, 3:51 PM MDT | Special Weather Statement | MSO | 39 min |
| Aug 1, 4:35 PM MDT | Special Weather Statement | MSO | 40 min |
| Aug 1, 5:03 PM MDT | Special Weather Statement | MSO | 27 min |
| Aug 1, 9:19 PM MDT | Red Flag Warning | PIH | 24 hr |
| Aug 2, 9:41 PM MDT | Red Flag Warning | PIH | 24 hr |
| Aug 5, 6:02 AM MDT | Special Weather Statement | PIH | 58 min |
| Aug 8, 1:55 PM MDT | Fire Weather Watch | PIH | 24 hr |
| Aug 9, 2:14 PM MDT | Red Flag Warning | PIH | 3 days |
| Aug 15, 2:03 PM MDT | Fire Weather Watch | PIH | 24 hr |
| Aug 16, 3:39 AM MDT | Red Flag Warning | PIH | 48 hr |
| Aug 17, 12:24 PM MDT | Special Weather Statement | MSO | 51 min |
| Aug 17, 1:08 PM MDT | Special Weather Statement | MSO | 37 min |
| Aug 17, 1:41 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 17, 2:16 PM MDT | Special Weather Statement | PIH | 44 min |
| Aug 17, 2:44 PM MDT | Special Weather Statement | MSO | 46 min |
| Aug 19, 1:52 PM MDT | Red Flag Warning | PIH | 30 hr |
| Aug 20, 1:55 PM MDT | Special Weather Statement | MSO | 35 min |
| Aug 20, 4:38 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 22, 3:38 AM MDT | Red Flag Warning | PIH | 17 hr |
| Aug 23, 1:48 AM MDT | Fire Weather Watch | PIH | 11 hr |
| Aug 23, 1:04 PM MDT | Red Flag Warning | PIH | 56 hr |
| Sep 6, 2:58 AM MDT | Red Flag Warning | PIH | 16 hr |
| Sep 9, 1:37 PM MDT | Red Flag Warning | PIH | 31 hr |
| Sep 15, 2:08 PM MDT | Red Flag Warning | PIH | 31 hr |
| Sep 20, 12:48 PM MDT | Fire Weather Watch | PIH | 23 hr |
| Sep 21, 11:40 AM MDT | Red Flag Warning | PIH | 32 hr |
| Oct 9, 3:48 AM MDT | Winter Weather Advisory | MSO | 29 hr |
| Nov 21, 2:47 PM MST | Winter Weather Advisory | MSO | 69 hr |
| Dec 10, 2:42 PM MST | Winter Weather Advisory | MSO | 50 hr |
| Dec 17, 2:37 PM MST | Winter Weather Advisory | MSO | 44 hr |
| Dec 20, 2:39 PM MST | Winter Weather Advisory | MSO | 20 hr |
| Dec 29, 2:11 PM MST | Winter Weather Advisory | MSO | 39 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 | 7 |
| Special Weather Statement | 20 |
| Flooding | |
| Areal Flood Advisory | 2 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Weather Advisory | 22 |
| Cold | |
| Frost Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 1 |
| Fire | |
| Red Flag Warning | 13 |
| Fire Weather Watch | 4 |
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.