Alert archive / Idaho / Twin Falls County
Weather alerts in Twin Falls County, Idaho, 2015
74 weather alerts in 2015, 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 2015. Tap one for its archive.
- Alerts
- 74
- Warnings
- 22
- Watches
- 11
- Advisories
- 18
- Busiest month
- August28 alerts
- Busiest day
- August 11, 20154 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, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 5 | 1 | 80% | 4 | 25% | 32 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Boise, ID: severe thunderstorm warnings | 22 | 5 | 77% | 15 | 40% | 19 min |
| NWS Boise, ID: flash flood warnings | 6 | 1 | 83% | 1 | 100% | 131 min |
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, 2:03 PM MST | Dense Fog Advisory | BOI | 59 hr |
| Jan 11, 1:22 PM MST | Winter Weather Advisory | BOI | 25 hr |
| Jan 12, 2:34 PM MST | Winter Storm Warning | BOI | 11 hr |
| Jan 15, 2:55 PM MST | Winter Weather Advisory | BOI | 23 hr |
| Jan 25, 9:11 PM MST | Dense Fog Advisory | BOI | 14 hr |
| Jan 28, 2:58 AM MST | Dense Fog Advisory | BOI | 10 hr |
| Feb 7, 2:52 AM MST | Wind Advisory | BOI | 14 hr |
| Mar 24, 2:45 AM MDT | Wind Advisory | BOI | 15 hr |
| Mar 28, 3:01 AM MDT | Wind Advisory | BOI | 15 hr |
| Mar 31, 2:35 AM MDT | Wind Advisory | BOI | 18 hr |
| Apr 12, 2:05 PM MDT | Wind Advisory | BOI | 55 hr |
| May 3, 1:29 PM MDT | Special Weather Statement | LKN | 46 min |
| May 3, 2:07 PM MDT | Special Weather Statement | BOI | 38 min |
| May 12, 12:53 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 20, 3:13 AM MDT | Flash Flood Watch | BOI | 7 hr |
| May 24, 4:48 PM MDT | Special Weather Statement | BOI | 27 min |
| May 25, 12:22 PM MDT | Special Weather Statement | LKN | 23 min |
| May 31, 5:51 PM MDT | Severe Thunderstorm Warning | BOI | 39 min |
| Jun 1, 12:49 PM MDT | Special Weather Statement | BOI | 41 min |
| Jun 1, 1:08 PM MDT | Severe Thunderstorm Warning | BOI | 48 min |
| Jun 3, 4:07 PM MDT | Special Weather Statement | LKN | 38 min |
| Jun 3, 4:31 PM MDT | Special Weather Statement | BOI | 44 min |
| Jun 6, 12:17 PM MDT | Special Weather Statement | BOI | 43 min |
| Jun 30, 2:18 PM MDT | Special Weather Statement | LKN | 42 min |
| Jun 30, 7:20 PM MDT | Special Weather Statement | LKN | 40 min |
| Jun 30, 7:36 PM MDT | Severe Thunderstorm Warning | BOI | 39 min |
| Jun 30, 8:11 PM MDT | Special Weather Statement | BOI | 49 min |
| Jul 7, 3:06 PM MDT | Red Flag Warning | BOI | 33 hr |
| Jul 11, 4:52 PM MDT | Special Weather Statement | BOI | 38 min |
| Jul 14, 4:01 PM MDT | Special Weather Statement | BOI | 44 min |
| Jul 14, 4:33 PM MDT | Special Weather Statement | BOI | 42 min |
| Jul 14, 5:07 PM MDT | Special Weather Statement | BOI | 38 min |
| Jul 15, 1:40 PM MDT | Special Weather Statement | LKN | 35 min |
| Aug 1, 2:10 PM MDT | Fire Weather Watch | PIH | 24 hr |
| Aug 1, 2:17 PM MDT | Fire Weather Watch | BOI | 24 hr |
| Aug 2, 1:45 PM MDT | Red Flag Warning | PIH | 30 hr |
| Aug 2, 2:22 PM MDT | Red Flag Warning | BOI | 36 hr |
| Aug 4, 8:57 AM MDT | Red Flag Warning | BOI | 34 hr |
| Aug 4, 12:55 PM MDT | Red Flag Warning | PIH | 30 hr |
| Aug 5, 10:59 AM MDT | Special Weather Statement | BOI | 46 min |
| Aug 5, 12:40 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 6, 3:16 PM MDT | Fire Weather Watch | BOI | 17 hr |
| Aug 7, 8:27 AM MDT | Red Flag Warning | BOI | 12 hr |
| Aug 11, 8:29 AM MDT | Fire Weather Watch | BOI | 6 hr |
| Aug 11, 2:38 PM MDT | Red Flag Warning | BOI | 12 hr |
| Aug 11, 3:13 PM MDT | Special Weather Statement | BOI | 62 min |
| Aug 11, 4:11 PM MDT | Special Weather Statement | BOI | 49 min |
| Aug 13, 8:38 AM MDT | Fire Weather Watch | BOI | 7 hr |
| Aug 13, 8:38 AM MDT | Red Flag Warning | BOI | 20 hr |
| Aug 13, 10:15 PM MDT | Special Weather Statement | BOI | 60 min |
| Aug 14, 4:20 AM MDT | Red Flag Warning | BOI | 20 hr |
| Aug 14, 11:46 AM MDT | Red Flag Warning | PIH | 13 hr |
| Aug 14, 1:12 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 14, 6:08 PM MDT | Severe Thunderstorm Warning | BOI | 23 min |
| Aug 16, 8:02 AM MDT | Fire Weather Watch | BOI | 7 hr |
| Aug 16, 12:18 PM MDT | Fire Weather Watch | PIH | 16 hr |
| Aug 16, 2:42 PM MDT | Red Flag Warning | BOI | 30 hr |
| Aug 17, 3:58 AM MDT | Red Flag Warning | PIH | 17 hr |
| Aug 20, 8:39 AM MDT | Fire Weather Watch | BOI | 24 hr |
| Aug 20, 2:53 PM MDT | Red Flag Warning | BOI | 30 hr |
| Aug 28, 2:18 PM MDT | Red Flag Warning | PIH | 36 hr |
| Sep 3, 2:12 PM MDT | Red Flag Warning | PIH | 32 hr |
| Nov 2, 4:38 AM MST | Winter Storm Watch | BOI | 8 hr |
| Nov 2, 1:02 PM MST | Winter Weather Advisory | BOI | 22 hr |
| Nov 15, 12:43 PM MST | Wind Advisory | BOI | 29 hr |
| Nov 17, 2:59 PM MST | Wind Advisory | BOI | 23 hr |
| Nov 23, 2:22 PM MST | Winter Storm Watch | BOI | 22 hr |
| Nov 24, 11:58 AM MST | Winter Storm Warning | BOI | 47 hr |
| Dec 3, 11:50 AM MST | Wind Advisory | BOI | 5 hr |
| Dec 12, 4:28 AM MST | Winter Weather Advisory | BOI | 61 hr |
| Dec 16, 2:17 PM MST | Winter Weather Advisory | BOI | 37 hr |
| Dec 19, 7:55 PM MST | Dense Fog Advisory | BOI | 15 hr |
| Dec 20, 2:48 AM MST | Winter Weather Advisory | BOI | 4 days |
| Dec 21, 7:46 PM MST | Severe Thunderstorm Warning | BOI | 18 min |
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 | 5 |
| Mesoscale Discussion | 3 |
| Special Weather Statement | 20 |
| Flooding | |
| Flash Flood Watch | 1 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 6 |
| Wind and dust | |
| Wind Advisory | 8 |
| Fire | |
| Red Flag Warning | 15 |
| Fire Weather Watch | 8 |
| Fog and smoke | |
| Dense Fog Advisory | 4 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20142016
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.