Alert archive / Idaho / Lemhi County
Weather alerts in Lemhi County, Idaho, 2011
91 weather alerts in 2011, 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 2011. Tap one for its archive.
- Alerts
- 91
- Warnings
- 19
- Watches
- 13
- Advisories
- 45
- Busiest month
- July15 alerts
- Busiest day
- July 12, 20115 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, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 2 | 0 | 100% | 3 | 0% | |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Missoula, MT: severe thunderstorm warnings | 17 | 9 | 47% | 25 | 60% | 16 min |
| NWS Missoula, MT: flash flood warnings | 4 | 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 11, 3:00 PM MST | Winter Weather Advisory | MSO | 50 hr |
| Jan 18, 3:21 AM MST | Winter Weather Advisory | MSO | 30 hr |
| Jan 26, 3:47 AM MST | Dense Fog Advisory | MSO | 9 hr |
| Feb 6, 4:13 AM MST | Winter Weather Advisory | MSO | 61 hr |
| Feb 12, 4:09 AM MST | High Wind Warning | MSO | 29 hr |
| Feb 14, 1:53 PM MST | Winter Weather Advisory | MSO | 3 days |
| Feb 19, 6:14 PM MST | Winter Weather Advisory | MSO | 34 hr |
| Feb 23, 5:18 AM MST | Winter Weather Advisory | MSO | 54 hr |
| Mar 10, 9:56 AM MST | Winter Weather Advisory | MSO | 23 hr |
| Mar 14, 8:06 AM MDT | Winter Weather Advisory | MSO | 3 hr |
| Mar 14, 2:37 PM MDT | Winter Weather Advisory | MSO | 42 hr |
| Mar 16, 2:29 PM MDT | Winter Weather Advisory | MSO | 16 hr |
| Mar 21, 3:14 AM MDT | Winter Weather Advisory | MSO | 33 hr |
| Mar 25, 3:21 AM MDT | Winter Weather Advisory | MSO | 11 hr |
| Mar 27, 7:26 AM MDT | Winter Weather Advisory | MSO | 5 hr |
| Mar 30, 9:48 AM MDT | Winter Weather Advisory | MSO | 5 hr |
| Apr 3, 2:37 PM MDT | Winter Weather Advisory | MSO | 45 hr |
| Apr 5, 3:55 AM MDT | Wind Advisory | MSO | 16 hr |
| Apr 5, 2:13 PM MDT | Winter Weather Advisory | MSO | 3 days |
| Apr 15, 1:59 PM MDT | Winter Weather Advisory | MSO | 20 hr |
| Apr 16, 2:17 PM MDT | Winter Weather Advisory | MSO | 21 hr |
| Apr 20, 2:13 PM MDT | Winter Weather Advisory | MSO | 44 hr |
| Apr 25, 2:22 PM MDT | Winter Weather Advisory | MSO | 20 hr |
| Apr 28, 3:13 AM MDT | Winter Weather Advisory | MSO | 51 hr |
| May 7, 9:01 PM MDT | Winter Storm Watch | MSO | 17 hr |
| May 8, 1:58 PM MDT | Winter Weather Advisory | MSO | 19 hr |
| May 15, 3:12 AM MDT | Wind Advisory | MSO | 19 hr |
| May 25, 3:12 AM MDT | Winter Weather Advisory | MSO | 54 hr |
| May 28, 2:27 PM MDT | Winter Weather Advisory | MSO | 55 hr |
| Jun 2, 8:22 AM MDT | Winter Weather Advisory | MSO | 6 hr |
| Jun 6, 10:40 AM MDT | Flood Watch | MSO | 71 hr |
| Jun 6, 2:13 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 6, 4:13 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 24, 5:26 AM MDT | Areal Flood Warning | MSO | 56 hr |
| Jun 24, 8:23 AM MDT | Areal Flood Advisory | MSO | 47 hr |
| Jun 28, 9:40 AM MDT | Flood Watch | MSO | 37 hr |
| Jun 29, 3:21 AM MDT | Wind Advisory | MSO | 18 hr |
| Jun 29, 8:40 AM MDT | Areal Flood Warning | MSO | 21 hr |
| Jun 29, 12:35 PM MDT | Mesoscale Discussion | SPC | 115 min |
| Jul 11, 2:53 PM MDT | Mesoscale Discussion | SPC | 97 min |
| Jul 12, 1:38 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 12, 1:46 PM MDT | Flash Flood Warning | MSO | 59 min |
| Jul 12, 2:04 PM MDT | Areal Flood Advisory | MSO | 100 min |
| Jul 12, 4:55 PM MDT | Areal Flood Advisory | MSO | 3 hr |
| Jul 12, 5:30 PM MDT | Mesoscale Discussion | SPC | 60 min |
| Jul 13, 12:36 PM MDT | Mesoscale Discussion | SPC | 114 min |
| Jul 13, 12:45 PM MDT | Flash Flood Watch | MSO | 7 hr |
| Jul 13, 1:07 PM MDT | Severe Thunderstorm Warning | MSO | 38 min |
| Jul 13, 1:45 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 13, 5:13 PM MDT | Mesoscale Discussion | SPC | 62 min |
| Jul 16, 2:04 PM MDT | Mesoscale Discussion | SPC | 56 min |
| Jul 16, 3:00 PM MDT | Areal Flood Advisory | MSO | 2 hr |
| Jul 19, 3:38 PM MDT | Wind Advisory | MSO | 5 hr |
| Jul 25, 1:25 PM MDT | Special Weather Statement | MSO | 35 min |
| Aug 1, 8:48 PM MDT | Special Weather Statement | MSO | 42 min |
| Aug 1, 9:03 PM MDT | Severe Thunderstorm Warning | MSO | 42 min |
| Aug 3, 3:15 PM MDT | Areal Flood Advisory | MSO | 105 min |
| Aug 6, 4:00 PM MDT | Special Weather Statement | MSO | 30 min |
| Aug 13, 7:59 PM MDT | Special Weather Statement | MSO | 61 min |
| Aug 13, 9:05 PM MDT | Special Weather Statement | MSO | 55 min |
| Aug 15, 1:38 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 20, 5:50 PM MDT | Special Weather Statement | MSO | 55 min |
| Aug 24, 8:53 PM MDT | Fire Weather Watch | PIH | 7 hr |
| Aug 25, 3:25 AM MDT | Red Flag Warning | PIH | 17 hr |
| Aug 26, 2:05 PM MDT | Red Flag Warning | PIH | 34 hr |
| Aug 28, 5:13 AM MDT | Red Flag Warning | PIH | 32 hr |
| Sep 4, 2:32 PM MDT | Red Flag Warning | PIH | 31 hr |
| Sep 6, 3:21 AM MDT | Red Flag Warning | PIH | 67 hr |
| Sep 9, 2:01 PM MDT | Fire Weather Watch | PIH | 24 hr |
| Sep 10, 2:05 PM MDT | Red Flag Warning | PIH | 55 hr |
| Sep 14, 3:26 AM MDT | Red Flag Warning | PIH | 18 hr |
| Sep 24, 1:43 PM MDT | Fire Weather Watch | PIH | 15 hr |
| Sep 25, 4:46 AM MDT | Red Flag Warning | PIH | 16 hr |
| Sep 30, 2:16 PM MDT | Fire Weather Watch | PIH | 12 hr |
| Oct 1, 2:46 AM MDT | Red Flag Warning | PIH | 18 hr |
| Nov 3, 2:26 PM MDT | Winter Weather Advisory | MSO | 46 hr |
| Nov 10, 12:24 PM MST | Winter Storm Warning | MSO | 45 hr |
| Nov 12, 1:50 PM MST | Winter Weather Advisory | MSO | 69 hr |
| Nov 16, 3:54 AM MST | Winter Storm Warning | MSO | 43 hr |
| Nov 17, 2:36 PM MST | Winter Weather Advisory | MSO | 38 hr |
| Nov 18, 8:31 AM MST | Winter Storm Warning | MSO | 20 hr |
| Nov 23, 1:48 PM MST | Winter Weather Advisory | MSO | 48 hr |
| Nov 28, 2:44 PM MST | Winter Storm Watch | MSO | 14 hr |
| Nov 29, 4:38 AM MST | Winter Storm Warning | MSO | 36 hr |
| Nov 29, 4:38 AM MST | Winter Weather Advisory | MSO | 36 hr |
| Dec 3, 2:08 PM MST | Winter Weather Advisory | MSO | 21 hr |
| Dec 20, 2:45 PM MST | Winter Weather Advisory | MSO | 24 hr |
| Dec 23, 12:06 PM MST | Flood Watch | MSO | 4 days |
| Dec 27, 3:15 AM MST | Winter Weather Advisory | MSO | 57 hr |
| Dec 27, 2:19 PM MST | Wind Advisory | MSO | 48 hr |
| Dec 29, 2:30 PM MST | Winter Weather Advisory | MSO | 42 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 | 2 |
| Severe Thunderstorm Watch | 3 |
| Mesoscale Discussion | 8 |
| Special Weather Statement | 6 |
| Flooding | |
| Areal Flood Warning | 2 |
| Flash Flood Warning | 1 |
| Flash Flood Watch | 1 |
| Flood Watch | 3 |
| Areal Flood Advisory | 5 |
| Winter | |
| Winter Storm Warning | 4 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 34 |
| Wind and dust | |
| High Wind Warning | 1 |
| Wind Advisory | 5 |
| Fire | |
| Red Flag Warning | 9 |
| Fire Weather Watch | 4 |
| Fog and smoke | |
| Dense Fog Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20102012
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.