Alert archive / Idaho / Twin Falls County
Weather alerts in Twin Falls County, Idaho, 2017
75 weather alerts in 2017, 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 2017. Tap one for its archive.
- Alerts
- 75
- Warnings
- 30
- Watches
- 12
- Advisories
- 23
- Busiest month
- August14 alerts
- Busiest day
- July 9, 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.
Twin Falls County, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 3 | 1 | 67% | 4 | 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 Boise, ID: severe thunderstorm warnings | 23 | 3 | 87% | 44 | 7% | 17 min |
| NWS Boise, ID: flash flood warnings | 8 | 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 2, 2:31 PM MST | Winter Storm Watch | BOI | 317 days |
| Jan 3, 4:23 AM MST | Winter Storm Warning | BOI | 43 hr |
| Jan 3, 4:23 AM MST | Winter Weather Advisory | BOI | 11 hr |
| Jan 5, 1:34 PM MST | Wind Chill Warning | BOI | 21 hr |
| Jan 6, 2:24 PM MST | Wind Chill Warning | BOI | 19 hr |
| Jan 6, 2:24 PM MST | Winter Storm Warning | BOI | 43 hr |
| Jan 7, 2:30 PM MST | Winter Weather Advisory | BOI | 27 hr |
| Jan 16, 3:00 PM MST | Winter Storm Watch | BOI | 25 hr |
| Jan 17, 4:49 AM MST | Winter Storm Warning | BOI | 54 hr |
| Jan 17, 4:49 AM MST | Winter Weather Advisory | BOI | 54 hr |
| Jan 22, 2:53 PM MST | Winter Weather Advisory | BOI | 27 hr |
| Jan 23, 2:35 PM MST | Winter Storm Warning | BOI | 7 hr |
| Jan 25, 5:31 AM MST | Dense Fog Advisory | BOI | 4 hr |
| Feb 6, 2:56 PM MST | Winter Weather Advisory | BOI | 26 hr |
| Feb 6, 3:27 PM MST | Areal Flood Advisory | BOI | 24 hr |
| Feb 7, 3:53 PM MST | Areal Flood Advisory | BOI | 24 hr |
| Feb 8, 11:04 AM MST | Areal Flood Advisory | BOI | 57 hr |
| Feb 9, 5:04 AM MST | Areal Flood Warning | BOI | 24 hr |
| Feb 10, 4:38 AM MST | Areal Flood Warning | BOI | 36 hr |
| Feb 20, 3:02 AM MST | Wind Advisory | BOI | 41 hr |
| Feb 22, 2:53 AM MST | Winter Weather Advisory | BOI | 35 hr |
| Feb 22, 3:05 PM MST | Winter Storm Warning | BOI | 38 hr |
| Mar 28, 1:49 PM MDT | Wind Advisory | BOI | 58 hr |
| Mar 29, 4:10 AM MDT | Winter Weather Advisory | BOI | 48 hr |
| Mar 29, 11:54 AM MDT | High Wind Warning | BOI | 36 hr |
| Mar 29, 3:42 PM MDT | Flood Watch | BOI | 35 hr |
| Apr 26, 2:28 PM MDT | Wind Advisory | BOI | 31 hr |
| May 5, 5:54 PM MDT | Severe Thunderstorm Warning | BOI | 27 min |
| May 7, 12:56 PM MDT | Flood Watch | BOI | 12 hr |
| May 12, 4:39 PM MDT | High Wind Warning | BOI | 3 hr |
| May 15, 3:04 PM MDT | Winter Weather Advisory | BOI | 24 hr |
| Jun 1, 4:58 PM MDT | Special Weather Statement | BOI | 47 min |
| Jun 4, 7:13 PM MDT | Severe Thunderstorm Warning | BOI | 47 min |
| Jun 4, 7:46 PM MDT | Severe Thunderstorm Warning | BOI | 44 min |
| Jun 11, 5:53 PM MDT | Special Weather Statement | BOI | 52 min |
| Jun 11, 6:39 PM MDT | Special Weather Statement | BOI | 51 min |
| Jun 22, 12:44 PM MDT | Red Flag Warning | BOI | 8 hr |
| Jul 9, 2:23 PM MDT | Special Weather Statement | LKN | 37 min |
| Jul 9, 2:49 PM MDT | Special Weather Statement | BOI | 26 min |
| Jul 9, 3:38 PM MDT | Special Weather Statement | BOI | 52 min |
| Jul 9, 5:00 PM MDT | Special Weather Statement | BOI | 45 min |
| Jul 13, 1:46 PM MDT | Fire Weather Watch | BOI | 25 hr |
| Jul 14, 3:06 PM MDT | Red Flag Warning | BOI | 33 hr |
| Jul 14, 3:51 PM MDT | Red Flag Warning | PIH | 29 hr |
| Jul 22, 3:08 PM MDT | Fire Weather Watch | BOI | 24 hr |
| Jul 23, 2:21 PM MDT | Red Flag Warning | PIH | 30 hr |
| Jul 23, 3:10 PM MDT | Red Flag Warning | BOI | 33 hr |
| Jul 24, 2:11 PM MDT | Flash Flood Watch | BOI | 34 hr |
| Jul 26, 2:26 PM MDT | Special Weather Statement | LKN | 49 min |
| Jul 29, 3:19 PM MDT | Special Weather Statement | BOI | 56 min |
| Aug 2, 5:44 PM MDT | Special Weather Statement | BOI | 91 min |
| Aug 3, 2:02 PM MDT | Fire Weather Watch | PIH | 13 hr |
| Aug 4, 3:28 AM MDT | Red Flag Warning | PIH | 18 hr |
| Aug 7, 8:42 AM MDT | Red Flag Warning | BOI | 13 hr |
| Aug 8, 2:21 PM MDT | Fire Weather Watch | BOI | 18 hr |
| Aug 9, 8:13 AM MDT | Red Flag Warning | BOI | 13 hr |
| Aug 10, 8:29 AM MDT | Red Flag Warning | BOI | 14 hr |
| Aug 11, 8:23 AM MDT | Red Flag Warning | BOI | 14 hr |
| Aug 21, 3:09 PM MDT | Fire Weather Watch | BOI | 23 hr |
| Aug 22, 2:32 PM MDT | Red Flag Warning | BOI | 33 hr |
| Aug 29, 8:29 AM MDT | Fire Weather Watch | BOI | 24 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 |
| Aug 30, 8:26 AM MDT | Red Flag Warning | BOI | 17 hr |
| Sep 14, 8:14 AM MDT | Red Flag Warning | BOI | 10 hr |
| Oct 2, 1:57 PM MDT | Freeze Warning | BOI | 20 hr |
| Dec 3, 4:15 AM MST | Wind Advisory | BOI | 22 hr |
| Dec 11, 6:53 AM MST | Dense Fog Advisory | BOI | 4 hr |
| Dec 12, 1:10 AM MST | Dense Fog Advisory | BOI | 12 hr |
| Dec 12, 1:59 PM MST | Dense Fog Advisory | BOI | 21 hr |
| Dec 18, 2:36 PM MST | Winter Weather Advisory | BOI | 44 hr |
| Dec 22, 11:02 AM MST | Winter Weather Advisory | BOI | 27 hr |
| Dec 23, 7:33 AM MST | Winter Storm Warning | BOI | 3 hr |
| Dec 23, 2:58 PM MST | Winter Weather Advisory | BOI | 43 hr |
| Dec 29, 9:01 PM MST | Winter Weather Advisory | BOI | 13 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 | 3 |
| Special Weather Statement | 10 |
| Flooding | |
| Areal Flood Warning | 2 |
| Flash Flood Watch | 1 |
| Flood Watch | 2 |
| Areal Flood Advisory | 3 |
| Winter | |
| Winter Storm Warning | 6 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 12 |
| Cold | |
| Freeze Warning | 1 |
| Wind Chill Warning | 2 |
| Wind and dust | |
| High Wind Warning | 2 |
| Wind Advisory | 4 |
| Fire | |
| Red Flag Warning | 14 |
| Fire Weather Watch | 7 |
| 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 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.