Alert archive / Idaho / Lemhi County
Weather alerts in Lemhi County, Idaho, 2019
76 weather alerts in 2019, 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 2019. Tap one for its archive.
- Alerts
- 76
- Warnings
- 19
- Watches
- 8
- Advisories
- 32
- Busiest month
- August24 alerts
- Busiest day
- August 10, 20197 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, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 3 | 0 | 100% | 1 | 0% | |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Missoula, MT: severe thunderstorm warnings | 35 | 14 | 60% | 52 | 35% | 9 min |
| NWS Missoula, MT: flash flood warnings | 1 | 0 | 100% | 4 | 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 6, 3:36 AM MST | Winter Weather Advisory | MSO | 46 hr |
| Jan 19, 1:24 PM MST | Winter Weather Advisory | MSO | 43 hr |
| Feb 2, 10:51 AM MST | Winter Weather Advisory | MSO | 47 hr |
| Feb 4, 7:58 PM MST | Winter Weather Advisory | MSO | 45 hr |
| Feb 7, 11:19 AM MST | Winter Weather Advisory | MSO | 3 days |
| Feb 14, 10:43 AM MST | Winter Weather Advisory | MSO | 46 hr |
| Feb 18, 3:03 PM MST | Winter Weather Advisory | MSO | 47 hr |
| Feb 23, 7:45 AM MST | Winter Weather Advisory | MSO | 3 days |
| Feb 23, 1:45 PM MST | Winter Storm Warning | MSO | 40 hr |
| Feb 24, 2:20 PM MST | Winter Weather Advisory | MSO | 45 hr |
| Feb 27, 6:17 AM MST | Winter Weather Advisory | MSO | 14 hr |
| Mar 12, 2:07 PM MDT | Winter Weather Advisory | MSO | 22 hr |
| Mar 26, 2:42 PM MDT | Winter Weather Advisory | MSO | 45 hr |
| Apr 9, 11:44 AM MDT | Winter Weather Advisory | MSO | 24 hr |
| Apr 20, 1:08 PM MDT | Special Weather Statement | MSO | 52 min |
| Apr 26, 1:06 PM MDT | Wind Advisory | MSO | 41 hr |
| Apr 29, 3:44 AM MDT | Winter Weather Advisory | MSO | 23 hr |
| May 26, 2:59 PM MDT | Special Weather Statement | MSO | 31 min |
| Jun 6, 8:38 AM MDT | Wind Advisory | MSO | 13 hr |
| Jun 6, 1:54 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 6, 8:43 PM MDT | Special Weather Statement | MSO | 47 min |
| Jun 18, 11:40 AM MDT | Wind Advisory | MSO | 33 hr |
| Jul 13, 3:33 PM MDT | Special Weather Statement | MSO | 27 min |
| Jul 14, 2:10 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 15, 4:56 PM MDT | Special Weather Statement | MSO | 49 min |
| Jul 22, 4:38 AM MDT | Fire Weather Watch | PIH | 22 hr |
| Jul 22, 4:38 AM MDT | Red Flag Warning | PIH | 16 hr |
| Jul 23, 3:00 AM MDT | Red Flag Warning | PIH | 18 hr |
| Jul 28, 2:35 PM MDT | Fire Weather Watch | PIH | 13 hr |
| Jul 29, 3:19 AM MDT | Red Flag Warning | PIH | 19 hr |
| Jul 29, 3:54 PM MDT | Mesoscale Discussion | SPC | 96 min |
| Jul 29, 6:24 PM MDT | Areal Flood Advisory | MSO | 66 min |
| Jul 30, 3:57 PM MDT | Severe Thunderstorm Warning | MSO | 33 min |
| Aug 1, 2:50 AM MDT | Red Flag Warning | PIH | 19 hr |
| Aug 1, 1:46 PM MDT | Red Flag Warning | PIH | 31 hr |
| Aug 1, 4:02 PM MDT | Areal Flood Advisory | MSO | 118 min |
| Aug 2, 5:37 PM MDT | Mesoscale Discussion | SPC | 113 min |
| Aug 4, 3:31 AM MDT | Red Flag Warning | PIH | 17 hr |
| Aug 7, 10:23 AM MDT | Red Flag Warning | PIH | 12 hr |
| Aug 7, 2:25 PM MDT | Fire Weather Watch | PIH | 8 hr |
| Aug 7, 10:02 PM MDT | Red Flag Warning | PIH | 23 hr |
| Aug 9, 12:17 PM MDT | Red Flag Warning | PIH | 33 hr |
| Aug 10, 11:41 AM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 10, 1:04 PM MDT | Special Weather Statement | MSO | 26 min |
| Aug 10, 1:36 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 10, 1:59 PM MDT | Severe Thunderstorm Warning | MSO | 31 min |
| Aug 10, 2:15 PM MDT | Flash Flood Warning | MSO | 2 hr |
| Aug 10, 4:08 PM MDT | Special Weather Statement | MSO | 37 min |
| Aug 10, 4:53 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 11, 4:43 AM MDT | Special Weather Statement | MSO | 32 min |
| Aug 11, 9:38 AM MDT | Special Weather Statement | MSO | 37 min |
| Aug 11, 11:48 AM MDT | Special Weather Statement | MSO | 27 min |
| Aug 11, 11:58 AM MDT | Severe Thunderstorm Warning | MSO | 32 min |
| Aug 11, 12:23 PM MDT | Areal Flood Advisory | MSO | 3 hr |
| Aug 30, 1:16 PM MDT | Fire Weather Watch | PIH | 24 hr |
| Aug 31, 1:34 PM MDT | Red Flag Warning | PIH | 31 hr |
| Aug 31, 1:34 PM MDT | Red Flag Warning | PIH | 54 hr |
| Sep 3, 1:24 PM MDT | Red Flag Warning | PIH | 32 hr |
| Sep 5, 12:58 PM MDT | Fire Weather Watch | PIH | 13 hr |
| Sep 6, 2:23 AM MDT | Red Flag Warning | PIH | 16 hr |
| Sep 6, 11:11 AM MDT | Flash Flood Watch | MSO | 7 hr |
| Sep 6, 2:12 PM MDT | Special Weather Statement | MSO | 48 min |
| Sep 24, 2:03 PM MDT | Winter Storm Watch | MSO | 5 days |
| Sep 26, 2:33 PM MDT | Winter Storm Warning | MSO | 3 days |
| Oct 7, 11:17 PM MDT | Winter Weather Advisory | MSO | 49 hr |
| Oct 18, 12:22 PM MDT | Winter Weather Advisory | MSO | 45 hr |
| Oct 27, 2:51 PM MDT | Winter Weather Advisory | MSO | 36 hr |
| Oct 28, 9:58 AM MDT | Wind Chill Advisory | MSO | 26 hr |
| Nov 1, 10:21 AM MDT | Air Stagnation Advisory | MSO | 11 days |
| Nov 28, 4:00 AM MST | Winter Weather Advisory | MSO | 9 hr |
| Nov 28, 1:48 PM MST | Winter Weather Advisory | MSO | 45 hr |
| Dec 6, 2:15 PM MST | Winter Weather Advisory | MSO | 52 hr |
| Dec 11, 3:31 AM MST | Winter Weather Advisory | MSO | 55 hr |
| Dec 14, 1:52 PM MST | Winter Weather Advisory | MSO | 45 hr |
| Dec 24, 7:31 PM MST | Freezing Fog Advisory | MSO | 15 hr |
| Dec 28, 10:53 PM MST | Winter Weather Advisory | MSO | 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 | 3 |
| Severe Thunderstorm Watch | 1 |
| Mesoscale Discussion | 6 |
| Special Weather Statement | 11 |
| Flooding | |
| Flash Flood Warning | 1 |
| Flash Flood Watch | 1 |
| Areal Flood Advisory | 3 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 23 |
| Cold | |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 3 |
| Fire | |
| Red Flag Warning | 13 |
| Fire Weather Watch | 5 |
| Fog and smoke | |
| Air Stagnation Advisory | 1 |
| Freezing Fog Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20182020
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.