Alert archive / Idaho / Lemhi County
Weather alerts in Lemhi County, Idaho, 2010
96 weather alerts in 2010, 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 2010. Tap one for its archive.
- Alerts
- 96
- Warnings
- 16
- Watches
- 13
- Advisories
- 40
- Busiest month
- August16 alerts
- Busiest day
- April 21, 20104 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, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 1 | 1 | 0% | 8 | 13% | 3 min |
| Flash flood warnings | 2 | 0 | 100% | 0 |
Each office's whole area, 2010
| 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 | 53 | 23 | 57% | 67 | 55% | 19 min |
| NWS Missoula, MT: flash flood warnings | 7 | 0 | 100% | 2 | 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 8, 12:54 PM MST | Areal Flood Advisory | MSO | 71 hr |
| Jan 11, 11:31 AM MST | Areal Flood Warning | MSO | 47 hr |
| Jan 22, 3:47 AM MST | Winter Storm Watch | MSO | 11 hr |
| Jan 22, 3:47 AM MST | Winter Weather Advisory | MSO | 43 hr |
| Jan 22, 7:46 AM MST | Winter Storm Warning | MSO | 37 hr |
| Mar 12, 4:14 AM MST | Winter Weather Advisory | MSO | 31 hr |
| Mar 21, 11:57 PM MDT | Winter Weather Advisory | MSO | 9 hr |
| Mar 29, 3:31 AM MDT | Winter Weather Advisory | MSO | 41 hr |
| Mar 29, 3:32 AM MDT | Wind Advisory | MSO | 14 hr |
| Apr 1, 3:03 PM MDT | Wind Advisory | MSO | 31 hr |
| Apr 2, 3:40 AM MDT | Winter Weather Advisory | MSO | 24 hr |
| Apr 5, 2:33 PM MDT | Winter Weather Advisory | MSO | 19 hr |
| Apr 7, 2:22 PM MDT | Wind Advisory | MSO | 31 hr |
| Apr 12, 2:50 PM MDT | Winter Weather Advisory | MSO | 27 hr |
| Apr 12, 4:37 PM MDT | Wind Advisory | MSO | 4 hr |
| Apr 21, 1:40 PM MDT | Special Weather Statement | MSO | 65 min |
| Apr 21, 1:43 PM MDT | Special Weather Statement | MSO | 62 min |
| Apr 21, 2:04 PM MDT | Special Weather Statement | MSO | 41 min |
| Apr 21, 4:37 PM MDT | Mesoscale Discussion | SPC | 53 min |
| Apr 27, 12:46 PM MDT | Wind Advisory | MSO | 7 hr |
| Apr 27, 8:27 PM MDT | Special Weather Statement | MSO | 33 min |
| May 1, 2:42 PM MDT | High Wind Watch | MSO | 31 hr |
| May 2, 11:13 AM MDT | High Wind Warning | MSO | 41 hr |
| May 2, 11:13 AM MDT | Wind Advisory | MSO | 28 hr |
| May 5, 4:21 AM MDT | Winter Storm Warning | MSO | 28 hr |
| May 5, 4:21 AM MDT | Winter Weather Advisory | MSO | 27 hr |
| May 10, 4:04 AM MDT | Winter Weather Advisory | MSO | 23 hr |
| May 21, 2:24 PM MDT | Winter Weather Advisory | MSO | 40 hr |
| May 23, 2:13 PM MDT | Winter Weather Advisory | MSO | 26 hr |
| Jun 5, 11:32 PM MDT | River Flood Warning | MSO | 16 hr |
| Jun 6, 3:32 AM MDT | Flood Watch | MSO | 31 hr |
| Jun 10, 2:35 PM MDT | Winter Weather Advisory | MSO | 7 hr |
| Jun 15, 12:27 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 16, 5:17 AM MDT | Areal Flood Advisory | MSO | 118 min |
| Jun 17, 4:24 AM MDT | Winter Weather Advisory | MSO | 5 hr |
| Jun 17, 5:31 AM MDT | River Flood Watch | MSO | 3 hr |
| Jun 19, 2:48 PM MDT | Special Weather Statement | MSO | 42 min |
| Jun 19, 2:55 PM MDT | Areal Flood Advisory | MSO | 72 min |
| Jun 25, 9:39 AM MDT | Flash Flood Watch | MSO | 11 hr |
| Jun 29, 2:31 PM MDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jun 29, 5:46 PM MDT | Mesoscale Discussion | SPC | 89 min |
| Jun 30, 1:28 PM MDT | Mesoscale Discussion | SPC | 62 min |
| Jun 30, 1:58 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 1, 12:45 PM MDT | Mesoscale Discussion | SPC | 60 min |
| Jul 1, 1:37 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 1, 4:57 PM MDT | Mesoscale Discussion | SPC | 63 min |
| Jul 9, 6:14 PM MDT | Special Weather Statement | MSO | 61 min |
| Jul 28, 1:36 PM MDT | Special Weather Statement | MSO | 39 min |
| Jul 31, 11:32 AM MDT | Special Weather Statement | MSO | 73 min |
| Jul 31, 12:53 PM MDT | Mesoscale Discussion | SPC | 67 min |
| Aug 5, 3:01 PM MDT | Special Weather Statement | MSO | 29 min |
| Aug 5, 3:35 PM MDT | Special Weather Statement | MSO | 25 min |
| Aug 5, 3:49 PM MDT | Special Weather Statement | MSO | 56 min |
| Aug 5, 4:02 PM MDT | Severe Thunderstorm Warning | MSO | 20 min |
| Aug 6, 2:09 PM MDT | Flash Flood Watch | MSO | 8 hr |
| Aug 6, 4:09 PM MDT | Areal Flood Advisory | MSO | 20 min |
| Aug 6, 4:22 PM MDT | Flash Flood Warning | MSO | 98 min |
| Aug 6, 5:56 PM MDT | Flash Flood Warning | MSO | 2 hr |
| Aug 8, 1:49 PM MDT | Special Weather Statement | MSO | 41 min |
| Aug 8, 3:59 PM MDT | Special Weather Statement | MSO | 61 min |
| Aug 9, 1:32 PM MDT | Flash Flood Watch | MSO | 8 hr |
| Aug 10, 1:40 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 10, 6:13 PM MDT | Areal Flood Advisory | MSO | 99 min |
| Aug 25, 1:50 PM MDT | Red Flag Warning | PIH | 37 hr |
| Aug 26, 11:22 AM MDT | Wind Advisory | MSO | 12 hr |
| Aug 26, 5:05 PM MDT | Special Weather Statement | MSO | 55 min |
| Sep 2, 1:42 PM MDT | Fire Weather Watch | PIH | 24 hr |
| Sep 3, 2:06 PM MDT | Red Flag Warning | PIH | 55 hr |
| Sep 4, 1:11 PM MDT | Mesoscale Discussion | SPC | 64 min |
| Sep 4, 10:55 PM MDT | Special Weather Statement | MSO | 50 min |
| Sep 14, 3:38 PM MDT | Special Weather Statement | MSO | 52 min |
| Sep 14, 3:49 PM MDT | Mesoscale Discussion | SPC | 56 min |
| Sep 18, 1:54 PM MDT | Red Flag Warning | PIH | 31 hr |
| Sep 19, 6:55 PM MDT | Special Weather Statement | MSO | 65 min |
| Oct 23, 1:35 PM MDT | Winter Weather Advisory | MSO | 70 hr |
| Nov 7, 2:17 PM MST | Winter Weather Advisory | MSO | 27 hr |
| Nov 14, 2:24 PM MST | Winter Weather Advisory | MSO | 69 hr |
| Nov 18, 4:00 AM MST | Wind Advisory | MSO | 13 hr |
| Nov 19, 3:06 AM MST | Winter Weather Advisory | MSO | 44 hr |
| Nov 21, 3:05 AM MST | Winter Storm Warning | MSO | 58 hr |
| Nov 21, 3:05 AM MST | Winter Weather Advisory | MSO | 58 hr |
| Nov 24, 10:07 AM MST | Wind Chill Warning | MSO | 10 hr |
| Nov 25, 8:02 AM MST | Winter Weather Advisory | MSO | 3 days |
| Dec 1, 2:47 PM MST | Winter Weather Advisory | MSO | 38 hr |
| Dec 2, 3:58 AM MST | Winter Storm Warning | MSO | 25 hr |
| Dec 6, 6:11 PM MST | Winter Weather Advisory | MSO | 3 hr |
| Dec 8, 7:44 PM MST | Winter Weather Advisory | MSO | 46 hr |
| Dec 10, 2:54 PM MST | Winter Weather Advisory | MSO | 46 hr |
| Dec 14, 4:37 AM MST | Winter Weather Advisory | MSO | 30 hr |
| Dec 14, 9:48 AM MST | High Wind Watch | MSO | 5 hr |
| Dec 19, 3:52 AM MST | Winter Weather Advisory | MSO | 33 hr |
| Dec 26, 3:38 AM MST | Winter Weather Advisory | MSO | 38 hr |
| Dec 27, 3:49 AM MST | Winter Storm Watch | MSO | 31 hr |
| Dec 27, 5:17 PM MST | Winter Storm Warning | MSO | 60 hr |
| Dec 28, 10:43 AM MST | Winter Weather Advisory | MSO | 46 hr |
| Dec 30, 7:18 PM MST | Wind Chill Warning | MSO | 10 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20092011
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.