Alert archive / Idaho / Lemhi County
Weather alerts in Lemhi County, Idaho, 2017
83 weather alerts in 2017, 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 2017. Tap one for its archive.
- Alerts
- 83
- Warnings
- 14
- Watches
- 8
- Advisories
- 41
- Busiest month
- January17 alerts
- Busiest day
- January 8, 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.
Lemhi County, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 0 | 1 | 0% | |||
| 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 Pocatello, ID: tornado warnings | 2 | 0 | 100% | 1 | 0% | |
| NWS Pocatello, ID: severe thunderstorm warnings | 33 | 6 | 82% | 44 | 59% | 14 min |
| NWS Pocatello, ID: flash flood warnings | 2 | 0 | 100% | 7 | 0% | |
| NWS Missoula, MT: tornado warnings | 0 | 1 | 0% | |||
| NWS Missoula, MT: severe thunderstorm warnings | 13 | 8 | 38% | 24 | 38% | 20 min |
| NWS Missoula, MT: flash flood warnings | 0 | 1 | 0% | |||
| NWS Boise, ID: severe thunderstorm warnings | 23 | 3 | 87% | 44 | 7% | 17 min |
| NWS Boise, ID: flash flood warnings | 8 | 0 | 100% | 0 | ||
| NWS Spokane, WA: severe thunderstorm warnings | 5 | 1 | 80% | 15 | 7% | 0 min |
| NWS Spokane, WA: flash flood warnings | 1 | 0 | 100% | 35 | 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, 4:21 PM MST | Areal Flood Advisory | MSO | 6 days |
| Jan 2, 5:54 PM MST | Areal Flood Advisory | MSO | 6 days |
| Jan 7, 2:35 PM MST | Winter Storm Watch | MSO | 59 days |
| Jan 7, 2:35 PM MST | Winter Weather Advisory | MSO | 50 hr |
| Jan 7, 11:27 PM MST | Winter Storm Warning | MSO | 42 hr |
| Jan 8, 3:35 AM MST | Winter Weather Advisory | MSO | 37 hr |
| Jan 8, 9:36 AM MST | Areal Flood Advisory | MSO | 34 hr |
| Jan 8, 9:41 AM MST | Areal Flood Advisory | MSO | 34 hr |
| Jan 10, 1:31 PM MST | Winter Weather Advisory | MSO | 21 hr |
| Jan 11, 10:31 AM MST | Areal Flood Advisory | MSO | 6 days |
| Jan 11, 10:40 AM MST | Areal Flood Advisory | MSO | 6 days |
| Jan 17, 2:39 PM MST | Areal Flood Advisory | MSO | 72 hr |
| Jan 17, 2:44 PM MST | Areal Flood Advisory | MSO | 71 hr |
| Jan 20, 4:08 PM MST | Areal Flood Advisory | MSO | 70 hr |
| Jan 23, 2:37 PM MST | Areal Flood Advisory | MSO | 7 days |
| Jan 30, 12:07 PM MST | Winter Storm Watch | MSO | 25 hr |
| Jan 31, 6:04 AM MST | Winter Weather Advisory | MSO | 29 hr |
| Feb 1, 2:36 PM MST | Winter Weather Advisory | MSO | 23 hr |
| Feb 2, 1:54 PM MST | Winter Weather Advisory | MSO | 69 hr |
| Feb 7, 9:24 AM MST | Winter Weather Advisory | MSO | 24 hr |
| Feb 8, 11:42 AM MST | Winter Weather Advisory | MSO | 23 hr |
| Feb 18, 12:46 PM MST | Areal Flood Advisory | MSO | 27 hr |
| Feb 21, 3:39 AM MST | Winter Weather Advisory | MSO | 31 hr |
| Feb 24, 7:18 AM MST | Winter Weather Advisory | MSO | 112 min |
| Mar 8, 2:04 PM MST | Winter Weather Advisory | MSO | 23 hr |
| Mar 27, 9:25 AM MDT | Winter Weather Advisory | MSO | 3 hr |
| Mar 29, 10:51 AM MDT | Areal Flood Advisory | MSO | 30 hr |
| Mar 29, 11:09 AM MDT | Areal Flood Advisory | MSO | 29 hr |
| Mar 29, 2:26 PM MDT | Winter Weather Advisory | MSO | 41 hr |
| Apr 7, 9:35 PM MDT | Winter Weather Advisory | MSO | 38 hr |
| Apr 13, 2:43 PM MDT | Winter Weather Advisory | MSO | 33 hr |
| May 6, 6:35 PM MDT | Special Weather Statement | MSO | 55 min |
| May 6, 7:47 PM MDT | Special Weather Statement | MSO | 43 min |
| May 7, 4:02 AM MDT | River Flood Warning | MSO | 72 hr |
| May 10, 4:30 AM MDT | Areal Flood Warning | MSO | 6 days |
| May 15, 12:54 PM MDT | Winter Storm Watch | MSO | 24 hr |
| May 16, 3:57 AM MDT | Winter Weather Advisory | MSO | 47 hr |
| May 16, 1:14 PM MDT | Winter Storm Warning | MSO | 38 hr |
| May 23, 9:54 AM MDT | Wind Advisory | MSO | 35 hr |
| May 31, 7:27 AM MDT | Areal Flood Warning | MSO | 15 days |
| May 31, 3:50 PM MDT | Special Weather Statement | MSO | 40 min |
| Jun 1, 12:42 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 1, 1:34 PM MDT | Areal Flood Advisory | MSO | 3 hr |
| Jun 4, 3:28 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 7, 4:18 PM MDT | Special Weather Statement | MSO | 27 min |
| Jun 10, 2:03 PM MDT | Flood Watch | MSO | 3 days |
| Jun 11, 8:59 PM MDT | Special Weather Statement | MSO | 61 min |
| Jun 11, 9:53 PM MDT | Special Weather Statement | MSO | 67 min |
| Jun 13, 7:54 PM MDT | Flood Watch | MSO | 10 hr |
| Jun 27, 3:25 PM MDT | Special Weather Statement | MSO | 35 min |
| Jun 27, 3:42 PM MDT | Special Weather Statement | MSO | 33 min |
| Jun 28, 12:39 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 5, 3:30 PM MDT | Special Weather Statement | MSO | 30 min |
| Jul 8, 3:05 PM MDT | Special Weather Statement | MSO | 25 min |
| Jul 8, 3:28 PM MDT | Special Weather Statement | MSO | 32 min |
| Jul 8, 3:52 PM MDT | Special Weather Statement | MSO | 38 min |
| Jul 9, 3:41 PM MDT | Special Weather Statement | MSO | 34 min |
| Jul 14, 3:51 PM MDT | Red Flag Warning | PIH | 29 hr |
| Jul 15, 2:07 PM MDT | Mesoscale Discussion | SPC | 53 min |
| Jul 20, 4:22 AM MDT | Red Flag Warning | PIH | 17 hr |
| Jul 23, 2:21 PM MDT | Red Flag Warning | PIH | 30 hr |
| Jul 24, 4:58 PM MDT | Special Weather Statement | MSO | 47 min |
| Aug 8, 1:53 PM MDT | Red Flag Warning | PIH | 7 hr |
| Aug 12, 12:33 PM MDT | Red Flag Warning | PIH | 22 hr |
| Aug 12, 10:22 PM MDT | Special Weather Statement | MSO | 38 min |
| Aug 18, 4:19 AM MDT | Fire Weather Watch | PIH | 8 hr |
| Aug 18, 12:08 PM MDT | Red Flag Warning | PIH | 33 hr |
| Aug 24, 2:14 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 29, 1:37 PM MDT | Fire Weather Watch | PIH | 14 hr |
| Aug 30, 3:54 AM MDT | Red Flag Warning | PIH | 23 hr |
| Sep 12, 2:03 PM MDT | Winter Storm Watch | MSO | 43 hr |
| Sep 14, 9:29 AM MDT | Winter Storm Warning | MSO | 45 hr |
| Sep 21, 3:33 AM MDT | Winter Weather Advisory | MSO | 44 hr |
| Sep 23, 1:29 PM MDT | Freeze Warning | MSO | 20 hr |
| Oct 12, 1:11 PM MDT | Winter Weather Advisory | MSO | 30 hr |
| Oct 21, 2:30 PM MDT | Wind Advisory | MSO | 30 hr |
| Nov 3, 4:20 AM MDT | Winter Weather Advisory | MSO | 29 hr |
| Dec 2, 3:26 AM MST | Winter Weather Advisory | MSO | 44 hr |
| Dec 13, 6:15 AM MST | Winter Weather Advisory | MSO | 14 hr |
| Dec 14, 2:27 PM MST | Winter Weather Advisory | MSO | 45 hr |
| Dec 19, 4:45 AM MST | Winter Weather Advisory | MSO | 39 hr |
| Dec 24, 3:31 AM MST | Winter Weather Advisory | MSO | 43 hr |
| Dec 28, 3:34 AM MST | Winter Weather Advisory | MSO | 57 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 | |
| Mesoscale Discussion | 5 |
| Special Weather Statement | 15 |
| Flooding | |
| Areal Flood Warning | 2 |
| River Flood Warning | 1 |
| Flood Watch | 2 |
| Areal Flood Advisory | 14 |
| Winter | |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 4 |
| Winter Weather Advisory | 25 |
| Cold | |
| Freeze Warning | 1 |
| Wind and dust | |
| Wind Advisory | 2 |
| Fire | |
| Red Flag Warning | 7 |
| Fire Weather Watch | 2 |
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.