Alert archive / Idaho / Lemhi County
Weather alerts in Lemhi County, Idaho, 2023
60 weather alerts in 2023, 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 2023. Tap one for its archive.
- Alerts
- 60
- Warnings
- 13
- Watches
- 5
- Advisories
- 33
- Busiest month
- August12 alerts
- Busiest day
- June 6, 20233 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, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 0 | 0 | ||||
| Flash flood warnings | 4 | 1 | 75% | 3 | 100% | 17 min |
Each office's whole area, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Missoula, MT: tornado warnings | 0 | 1 | 0% | |||
| NWS Missoula, MT: severe thunderstorm warnings | 13 | 3 | 77% | 25 | 20% | 10 min |
| NWS Missoula, MT: flash flood warnings | 7 | 2 | 71% | 4 | 100% | 29 min |
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 10, 1:28 PM MST | Winter Weather Advisory | MSO | 21 hr |
| Jan 13, 12:11 PM MST | Winter Weather Advisory | MSO | 23 hr |
| Jan 18, 11:43 AM MST | Winter Weather Advisory | MSO | 23 hr |
| Jan 26, 1:59 PM MST | Winter Weather Advisory | MSO | 51 hr |
| Jan 28, 1:48 PM MST | Wind Chill Advisory | MSO | 20 hr |
| Feb 12, 12:24 PM MST | Winter Weather Advisory | MSO | 60 hr |
| Feb 18, 2:25 PM MST | Winter Weather Advisory | MSO | 4 days |
| Feb 21, 9:00 PM MST | Wind Chill Advisory | MSO | 39 hr |
| Feb 26, 6:39 PM MST | Winter Weather Advisory | MSO | 9 hr |
| Mar 4, 3:22 AM MST | Winter Weather Advisory | MSO | 36 hr |
| Mar 9, 12:07 PM MST | Winter Storm Warning | MSO | 30 hr |
| Mar 9, 12:07 PM MST | Winter Weather Advisory | MSO | 47 hr |
| Mar 19, 2:40 PM MDT | Winter Weather Advisory | MSO | 42 hr |
| Mar 20, 11:08 AM MDT | Winter Storm Warning | MSO | 19 hr |
| Mar 24, 7:32 PM MDT | Winter Weather Advisory | MSO | 10 hr |
| Mar 25, 3:15 AM MDT | Winter Weather Advisory | MSO | 45 hr |
| Mar 28, 1:21 PM MDT | Winter Weather Advisory | MSO | 59 hr |
| Mar 31, 1:00 PM MDT | Wind Advisory | MSO | 32 hr |
| Apr 1, 4:00 PM MDT | Special Weather Statement | MSO | 60 min |
| Apr 2, 3:23 PM MDT | Winter Weather Advisory | MSO | 21 hr |
| Apr 9, 2:34 PM MDT | Wind Advisory | MSO | 52 hr |
| Apr 11, 2:32 PM MDT | Winter Weather Advisory | MSO | 45 hr |
| Apr 17, 1:49 PM MDT | Winter Weather Advisory | MSO | 23 hr |
| Apr 20, 2:01 PM MDT | Winter Weather Advisory | MSO | 22 hr |
| Apr 23, 2:32 PM MDT | Winter Weather Advisory | MSO | 39 hr |
| Apr 24, 7:37 AM MDT | Winter Weather Advisory | MSO | 22 hr |
| Jun 5, 12:42 PM MDT | Areal Flood Advisory | MSO | 3 hr |
| Jun 6, 3:07 PM MDT | Areal Flood Advisory | MSO | 113 min |
| Jun 6, 3:31 PM MDT | Flash Flood Warning | MSO | 2 hr |
| Jun 6, 5:02 PM MDT | Flash Flood Warning | MSO | 118 min |
| Jun 7, 10:50 AM MDT | Flood Watch | MSO | 12 hr |
| Jun 8, 3:02 AM MDT | Flood Watch | MSO | 18 hr |
| Jun 19, 6:47 AM MDT | Wind Advisory | MSO | 14 hr |
| Jul 10, 2:07 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 23, 2:45 PM MDT | Special Weather Statement | MSO | 45 min |
| Jul 23, 3:36 PM MDT | Special Weather Statement | MSO | 39 min |
| Jul 24, 2:36 PM MDT | Red Flag Warning | PIH | 31 hr |
| Jul 25, 2:34 PM MDT | Red Flag Warning | PIH | 30 hr |
| Jul 26, 1:42 PM MDT | Red Flag Warning | PIH | 31 hr |
| Jul 27, 1:59 PM MDT | Red Flag Warning | PIH | 31 hr |
| Jul 28, 1:44 PM MDT | Red Flag Warning | PIH | 30 hr |
| Jul 29, 1:50 PM MDT | Red Flag Warning | PIH | 31 hr |
| Jul 30, 1:47 PM MDT | Red Flag Warning | PIH | 31 hr |
| Aug 5, 5:58 PM MDT | Flash Flood Warning | MSO | 3 hr |
| Aug 5, 7:15 PM MDT | Flash Flood Warning | MSO | 94 min |
| Aug 6, 12:52 PM MDT | Flood Watch | MSO | 32 hr |
| Aug 7, 5:21 PM MDT | Areal Flood Advisory | MSO | 96 min |
| Aug 18, 1:02 PM MDT | Mesoscale Discussion | SPC | 118 min |
| Aug 19, 10:08 AM MDT | Flood Watch | MSO | 4 days |
| Aug 20, 12:20 PM MDT | Wind Advisory | MSO | 34 hr |
| Aug 25, 5:25 PM MDT | Special Weather Statement | MSO | 50 min |
| Aug 25, 5:52 PM MDT | Special Weather Statement | MSO | 38 min |
| Aug 29, 2:31 PM MDT | Mesoscale Discussion | SPC | 119 min |
| Aug 29, 2:54 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 29, 7:16 PM MDT | Mesoscale Discussion | SPC | 89 min |
| Sep 20, 1:52 PM MDT | Winter Weather Advisory | MSO | 46 hr |
| Oct 23, 1:40 PM MDT | Winter Weather Advisory | MSO | 4 days |
| Nov 21, 11:38 AM MST | Winter Weather Advisory | MSO | 53 hr |
| Dec 14, 10:53 AM MST | Air Stagnation Advisory | MSO | 5 days |
| Dec 22, 11:43 AM MST | Winter Weather Advisory | MSO | 23 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 Watch | 1 |
| Mesoscale Discussion | 4 |
| Special Weather Statement | 5 |
| Flooding | |
| Flash Flood Warning | 4 |
| Flood Watch | 4 |
| Areal Flood Advisory | 3 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Weather Advisory | 23 |
| Cold | |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 4 |
| Fire | |
| Red Flag Warning | 7 |
| Fog and smoke | |
| Air Stagnation Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20222024
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.