Alert archive / Idaho / Twin Falls County
Weather alerts in Twin Falls County, Idaho, 2012
49 weather alerts in 2012, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Twin Falls County and its neighbors
Each county as a circle sized by its count in 2012. Tap one for its archive.
- Alerts
- 49
- Warnings
- 11
- Watches
- 4
- Advisories
- 22
- Busiest month
- October7 alerts
- Busiest day
- September 1, 20124 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Twin Falls County, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 4 | 2 | 50% | 4 | 25% | 8 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Boise, ID: tornado warnings | 1 | 0 | 100% | 0 | ||
| NWS Boise, ID: severe thunderstorm warnings | 24 | 5 | 79% | 22 | 50% | 20 min |
| NWS Boise, ID: flash flood warnings | 2 | 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 16, 2:51 PM MST | Winter Storm Watch | BOI | 13 hr |
| Jan 16, 2:51 PM MST | Winter Storm Warning | BOI | 3 days |
| Jan 19, 8:33 PM MST | Areal Flood Advisory | BOI | 8 hr |
| Jan 20, 2:49 PM MST | Wind Advisory | BOI | 28 hr |
| Jan 22, 4:14 AM MST | Winter Weather Advisory | BOI | 35 hr |
| Feb 16, 1:31 PM MST | Winter Weather Advisory | BOI | 51 hr |
| Feb 19, 2:29 PM MST | High Wind Watch | BOI | 48 hr |
| Feb 21, 2:15 PM MST | High Wind Warning | BOI | 30 hr |
| Feb 24, 3:20 AM MST | Wind Advisory | BOI | 24 hr |
| Feb 25, 3:17 AM MST | High Wind Warning | BOI | 14 hr |
| Feb 29, 3:26 PM MST | Winter Weather Advisory | BOI | 29 hr |
| Mar 5, 1:05 PM MST | Wind Advisory | BOI | 30 hr |
| Mar 17, 3:48 AM MDT | Winter Weather Advisory | BOI | 34 hr |
| Mar 25, 9:06 PM MDT | Wind Advisory | BOI | 13 hr |
| Mar 30, 12:19 PM MDT | Wind Advisory | BOI | 35 hr |
| Apr 1, 3:00 AM MDT | Wind Advisory | BOI | 18 hr |
| Apr 6, 3:41 AM MDT | Wind Advisory | BOI | 11 hr |
| Apr 13, 2:12 PM MDT | Wind Advisory | BOI | 30 hr |
| Apr 24, 2:03 PM MDT | Special Weather Statement | LKN | 27 min |
| Apr 24, 7:59 PM MDT | Special Weather Statement | LKN | 31 min |
| May 5, 1:49 PM MDT | Freeze Warning | BOI | 19 hr |
| Jun 8, 3:14 AM MDT | Wind Advisory | BOI | 39 hr |
| Jun 16, 8:45 PM MDT | Wind Advisory | BOI | 24 hr |
| Jun 18, 2:39 AM MDT | Wind Advisory | BOI | 18 hr |
| Jul 9, 3:40 PM MDT | Special Weather Statement | LKN | 35 min |
| Jul 22, 3:00 PM MDT | Special Weather Statement | BOI | 30 min |
| Aug 5, 6:47 PM MDT | Special Weather Statement | BOI | 58 min |
| Aug 26, 5:46 PM MDT | Special Weather Statement | BOI | 59 min |
| Aug 26, 6:04 PM MDT | Severe Thunderstorm Warning | BOI | 56 min |
| Aug 26, 6:48 PM MDT | Special Weather Statement | BOI | 42 min |
| Aug 26, 7:41 PM MDT | Severe Thunderstorm Warning | BOI | 34 min |
| Aug 31, 3:58 PM MDT | Special Weather Statement | BOI | 62 min |
| Sep 1, 2:52 PM MDT | Special Weather Statement | BOI | 53 min |
| Sep 1, 3:02 PM MDT | Mesoscale Discussion | SPC | 88 min |
| Sep 1, 3:22 PM MDT | Severe Thunderstorm Warning | BOI | 23 min |
| Sep 1, 4:03 PM MDT | Special Weather Statement | BOI | 42 min |
| Oct 2, 3:34 AM MDT | Freeze Warning | BOI | 53 hr |
| Oct 4, 1:46 PM MDT | Freeze Warning | BOI | 19 hr |
| Oct 5, 2:54 PM MDT | Hard Freeze Warning | BOI | 18 hr |
| Oct 14, 11:59 AM MDT | High Wind Watch | BOI | 26 hr |
| Oct 14, 11:59 AM MDT | Wind Advisory | BOI | 56 hr |
| Oct 16, 11:30 AM MDT | Severe Thunderstorm Warning | BOI | 45 min |
| Oct 16, 12:20 PM MDT | Special Weather Statement | BOI | 55 min |
| Nov 14, 12:22 PM MST | Dense Fog Advisory | BOI | 24 hr |
| Dec 1, 2:34 AM MST | Wind Advisory | BOI | 38 hr |
| Dec 14, 3:32 PM MST | Winter Weather Advisory | BOI | 37 hr |
| Dec 16, 3:12 PM MST | Wind Advisory | BOI | 26 hr |
| Dec 24, 9:23 AM MST | Winter Storm Watch | BOI | 5 hr |
| Dec 24, 9:23 AM MST | Winter Weather Advisory | BOI | 3 days |
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 | 4 |
| Mesoscale Discussion | 1 |
| Special Weather Statement | 11 |
| Flooding | |
| Areal Flood Advisory | 1 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 6 |
| Cold | |
| Freeze Warning | 3 |
| Hard Freeze Warning | 1 |
| Wind and dust | |
| High Wind Warning | 2 |
| High Wind Watch | 2 |
| Wind Advisory | 14 |
| 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 archive20112013
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.