Alert archive / Idaho / Twin Falls County
Weather alerts in Twin Falls County, Idaho, 2018
63 weather alerts in 2018, 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 2018. Tap one for its archive.
- Alerts
- 63
- Warnings
- 20
- Watches
- 9
- Advisories
- 22
- Busiest month
- May13 alerts
- Busiest day
- May 31, 20189 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, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 5 | 1 | 80% | 1 | 100% | 0 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Boise, ID: severe thunderstorm warnings | 40 | 6 | 85% | 16 | 44% | 24 min |
| NWS Boise, ID: flash flood warnings | 1 | 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 20, 1:39 PM MST | Winter Weather Advisory | BOI | 45 hr |
| Jan 26, 3:51 AM MST | Winter Weather Advisory | BOI | 49 hr |
| Feb 12, 2:45 AM MST | Winter Weather Advisory | BOI | 9 hr |
| Feb 17, 9:44 AM MST | Winter Weather Advisory | BOI | 37 hr |
| Feb 23, 3:11 AM MST | Winter Storm Watch | BOI | 11 hr |
| Feb 23, 1:59 PM MST | Winter Weather Advisory | BOI | 30 hr |
| Feb 24, 9:01 PM MST | Winter Weather Advisory | BOI | 41 hr |
| Mar 2, 9:32 PM MST | Winter Weather Advisory | BOI | 15 hr |
| Mar 15, 2:02 PM MDT | Winter Weather Advisory | BOI | 68 hr |
| Mar 31, 1:59 PM MDT | Wind Advisory | BOI | 54 hr |
| Apr 6, 3:04 AM MDT | Wind Advisory | BOI | 42 hr |
| Apr 11, 3:42 AM MDT | High Wind Watch | BOI | 11 hr |
| Apr 11, 2:19 PM MDT | High Wind Warning | BOI | 26 hr |
| Apr 11, 2:19 PM MDT | Wind Advisory | BOI | 31 hr |
| May 16, 2:40 PM MDT | Severe Thunderstorm Warning | BOI | 35 min |
| May 20, 1:35 PM MDT | Special Weather Statement | BOI | 40 min |
| May 26, 12:07 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 26, 6:41 PM MDT | Areal Flood Advisory | BOI | 109 min |
| May 30, 6:00 PM MDT | Severe Thunderstorm Warning | BOI | 30 min |
| May 31, 12:27 PM MDT | Special Weather Statement | BOI | 63 min |
| May 31, 12:33 PM MDT | Mesoscale Discussion | SPC | 117 min |
| May 31, 12:49 PM MDT | Severe Thunderstorm Warning | BOI | 41 min |
| May 31, 1:10 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 31, 1:27 PM MDT | Severe Thunderstorm Warning | BOI | 38 min |
| May 31, 1:33 PM MDT | Severe Thunderstorm Warning | BOI | 27 min |
| May 31, 1:58 PM MDT | Special Weather Statement | BOI | 32 min |
| May 31, 2:32 PM MDT | Special Weather Statement | BOI | 28 min |
| Jul 8, 2:23 PM MDT | Heat Advisory | BOI | 32 hr |
| Jul 13, 1:29 PM MDT | Fire Weather Watch | PIH | 25 hr |
| Jul 13, 1:41 PM MDT | Fire Weather Watch | BOI | 25 hr |
| Jul 14, 2:47 PM MDT | Red Flag Warning | BOI | 32 hr |
| Jul 16, 8:21 AM MDT | Red Flag Warning | BOI | 13 hr |
| Jul 24, 8:07 AM MDT | Red Flag Warning | BOI | 15 hr |
| Jul 24, 11:14 AM MDT | Red Flag Warning | PIH | 12 hr |
| Jul 25, 5:04 PM MDT | Special Weather Statement | LKN | 41 min |
| Jul 31, 2:51 PM MDT | Red Flag Warning | PIH | 30 hr |
| Aug 3, 8:23 AM MDT | Red Flag Warning | BOI | 13 hr |
| Aug 8, 8:31 PM MDT | Heat Advisory | BOI | 51 hr |
| Aug 15, 2:03 PM MDT | Fire Weather Watch | BOI | 24 hr |
| Aug 15, 2:03 PM MDT | Fire Weather Watch | PIH | 24 hr |
| Aug 16, 3:39 AM MDT | Red Flag Warning | PIH | 48 hr |
| Aug 16, 8:08 AM MDT | Red Flag Warning | BOI | 40 hr |
| Aug 17, 1:27 PM MDT | Special Weather Statement | BOI | 48 min |
| Aug 17, 1:41 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 17, 2:11 PM MDT | Special Weather Statement | BOI | 49 min |
| Aug 17, 2:26 PM MDT | Special Weather Statement | BOI | 49 min |
| Aug 19, 1:40 PM MDT | Red Flag Warning | BOI | 30 hr |
| Aug 19, 1:52 PM MDT | Red Flag Warning | PIH | 30 hr |
| Sep 13, 2:07 PM MDT | Fire Weather Watch | PIH | 24 hr |
| Sep 14, 2:14 PM MDT | Red Flag Warning | PIH | 31 hr |
| Sep 15, 8:01 AM MDT | Red Flag Warning | BOI | 11 hr |
| Sep 29, 8:37 AM MDT | Red Flag Warning | PIH | 11 hr |
| Oct 11, 9:43 AM MDT | Frost Advisory | BOI | 24 hr |
| Oct 13, 2:32 AM MDT | Freeze Watch | BOI | 11 hr |
| Oct 13, 2:32 AM MDT | Wind Advisory | BOI | 18 hr |
| Oct 13, 1:45 PM MDT | Freeze Warning | BOI | 20 hr |
| Nov 2, 3:15 AM MDT | Wind Advisory | BOI | 16 hr |
| Dec 1, 2:14 PM MST | Winter Weather Advisory | BOI | 21 hr |
| Dec 23, 2:05 PM MST | Winter Weather Advisory | BOI | 32 hr |
| Dec 25, 3:05 AM MST | Winter Weather Advisory | BOI | 15 hr |
| Dec 26, 2:56 AM MST | Winter Weather Advisory | BOI | 34 hr |
| Dec 29, 2:56 PM MST | Wind Advisory | BOI | 24 hr |
| Dec 30, 11:31 AM MST | Mesoscale Discussion | SPC | 6 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 | 5 |
| Severe Thunderstorm Watch | 1 |
| Mesoscale Discussion | 4 |
| Special Weather Statement | 8 |
| Flooding | |
| Areal Flood Advisory | 1 |
| Winter | |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 12 |
| Heat | |
| Heat Advisory | 2 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Frost Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 6 |
| Fire | |
| Red Flag Warning | 13 |
| Fire Weather Watch | 5 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20172019
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.