Alert archive / Idaho / Twin Falls County
Weather alerts in Twin Falls County, Idaho, 2019
83 weather alerts in 2019, 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 2019. Tap one for its archive.
- Alerts
- 83
- Warnings
- 25
- Watches
- 10
- Advisories
- 26
- Busiest month
- July17 alerts
- Busiest day
- September 6, 20195 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 1 tornado reports fell inside a warning.
Twin Falls County, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 1 | 0% | |||
| Severe thunderstorm warnings | 6 | 4 | 33% | 10 | 50% | 9 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Boise, ID: tornado warnings | 1 | 0 | 100% | 3 | 0% | |
| NWS Boise, ID: severe thunderstorm warnings | 40 | 9 | 78% | 29 | 45% | 9 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 20, 2:44 AM MST | Winter Weather Advisory | BOI | 24 hr |
| Jan 20, 2:55 AM MST | Wind Advisory | BOI | 41 hr |
| Feb 8, 3:02 AM MST | Winter Weather Advisory | BOI | 56 hr |
| Feb 9, 2:13 PM MST | Winter Weather Advisory | BOI | 47 hr |
| Feb 12, 2:04 PM MST | Winter Weather Advisory | BOI | 25 hr |
| Feb 17, 2:39 PM MST | Winter Weather Advisory | BOI | 16 hr |
| Feb 19, 3:37 AM MST | Winter Weather Advisory | BOI | 55 hr |
| Feb 20, 10:24 PM MST | Winter Storm Warning | BOI | 5 hr |
| Mar 7, 3:21 AM MST | Winter Weather Advisory | BOI | 32 hr |
| Mar 12, 3:27 AM MDT | Wind Advisory | BOI | 41 hr |
| Apr 8, 3:48 AM MDT | Wind Advisory | BOI | 66 hr |
| Apr 9, 2:50 PM MDT | Winter Weather Advisory | BOI | 18 hr |
| May 7, 3:47 PM MDT | Special Weather Statement | BOI | 43 min |
| May 7, 4:36 PM MDT | Special Weather Statement | BOI | 39 min |
| May 26, 8:10 PM MDT | Special Weather Statement | PIH | 50 min |
| May 26, 8:15 PM MDT | Special Weather Statement | BOI | 45 min |
| May 27, 3:45 PM MDT | Severe Thunderstorm Warning | BOI | 45 min |
| May 27, 4:30 PM MDT | Special Weather Statement | BOI | 45 min |
| May 29, 9:26 AM MDT | Flash Flood Watch | BOI | 13 hr |
| Jun 2, 2:41 PM MDT | Special Weather Statement | BOI | 34 min |
| Jun 13, 1:35 PM MDT | Special Weather Statement | LKN | 40 min |
| Jun 19, 2:06 PM MDT | Wind Advisory | BOI | 30 hr |
| Jul 4, 2:26 PM MDT | Special Weather Statement | LKN | 49 min |
| Jul 4, 2:36 PM MDT | Special Weather Statement | BOI | 39 min |
| Jul 6, 3:14 PM MDT | Fire Weather Watch | BOI | 22 hr |
| Jul 7, 1:41 PM MDT | Red Flag Warning | BOI | 30 hr |
| Jul 7, 2:11 PM MDT | Special Weather Statement | BOI | 49 min |
| Jul 7, 2:55 PM MDT | Special Weather Statement | BOI | 50 min |
| Jul 12, 2:38 PM MDT | Special Weather Statement | BOI | 22 min |
| Jul 12, 3:00 PM MDT | Special Weather Statement | BOI | 45 min |
| Jul 13, 2:27 AM MDT | Red Flag Warning | PIH | 20 hr |
| Jul 13, 8:17 AM MDT | Red Flag Warning | BOI | 14 hr |
| Jul 14, 12:17 PM MDT | Red Flag Warning | PIH | 8 hr |
| Jul 21, 1:35 PM MDT | Fire Weather Watch | BOI | 19 hr |
| Jul 22, 4:38 AM MDT | Fire Weather Watch | PIH | 22 hr |
| Jul 22, 8:26 AM MDT | Red Flag Warning | BOI | 16 hr |
| Jul 22, 1:28 PM MDT | Red Flag Warning | BOI | 35 hr |
| Jul 22, 6:14 PM MDT | Special Weather Statement | BOI | 31 min |
| Jul 23, 3:00 AM MDT | Red Flag Warning | PIH | 18 hr |
| Aug 7, 8:17 AM MDT | Fire Weather Watch | BOI | 6 hr |
| Aug 7, 2:01 PM MDT | Red Flag Warning | BOI | 3 days |
| Aug 7, 2:25 PM MDT | Fire Weather Watch | PIH | 8 hr |
| Aug 7, 10:02 PM MDT | Red Flag Warning | PIH | 23 hr |
| Aug 9, 5:47 PM MDT | Special Weather Statement | BOI | 43 min |
| Aug 9, 11:22 PM MDT | Special Weather Statement | LKN | 23 min |
| Aug 9, 11:43 PM MDT | Special Weather Statement | BOI | 47 min |
| Aug 16, 3:11 AM MDT | Fire Weather Watch | PIH | 11 hr |
| Aug 16, 2:06 PM MDT | Red Flag Warning | PIH | 31 hr |
| Aug 23, 1:35 PM MDT | Red Flag Warning | PIH | 55 hr |
| Aug 25, 8:08 AM MDT | Red Flag Warning | BOI | 12 hr |
| Aug 31, 1:34 PM MDT | Red Flag Warning | PIH | 54 hr |
| Sep 3, 2:43 PM MDT | Fire Weather Watch | BOI | 23 hr |
| Sep 4, 1:33 PM MDT | Red Flag Warning | BOI | 40 hr |
| Sep 5, 12:58 PM MDT | Fire Weather Watch | PIH | 13 hr |
| Sep 6, 2:23 AM MDT | Red Flag Warning | PIH | 16 hr |
| Sep 6, 7:56 AM MDT | Red Flag Warning | BOI | 10 hr |
| Sep 6, 12:44 PM MDT | Severe Thunderstorm Warning | BOI | 46 min |
| Sep 6, 1:04 PM MDT | Mesoscale Discussion | SPC | 86 min |
| Sep 6, 1:26 PM MDT | Severe Thunderstorm Warning | BOI | 49 min |
| Sep 9, 6:15 PM MDT | Special Weather Statement | BOI | 30 min |
| Sep 9, 6:53 PM MDT | Severe Thunderstorm Warning | BOI | 29 min |
| Sep 9, 7:36 PM MDT | Severe Thunderstorm Warning | BOI | 24 min |
| Sep 10, 12:14 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 10, 2:40 PM MDT | Special Weather Statement | BOI | 50 min |
| Sep 29, 3:37 AM MDT | Freeze Warning | BOI | 29 hr |
| Oct 3, 2:13 PM MDT | Wind Advisory | BOI | 13 hr |
| Oct 8, 3:19 AM MDT | Wind Advisory | BOI | 40 hr |
| Oct 18, 1:42 PM MDT | Wind Advisory | BOI | 30 hr |
| Oct 19, 2:28 PM MDT | Severe Thunderstorm Warning | BOI | 32 min |
| Oct 26, 9:22 AM MDT | Wind Advisory | BOI | 10 hr |
| Oct 28, 2:09 PM MDT | Wind Advisory | BOI | 22 hr |
| Oct 29, 10:37 AM MDT | Special Weather Statement | BOI | 83 min |
| Nov 1, 12:58 PM MDT | Air Stagnation Advisory | BOI | 4 days |
| Nov 7, 2:33 PM MST | Air Stagnation Advisory | BOI | 8 days |
| Nov 11, 1:47 PM MST | Air Stagnation Advisory | BOI | 4 days |
| Nov 16, 2:48 AM MST | Air Stagnation Advisory | BOI | 56 hr |
| Nov 25, 11:40 AM MST | Winter Storm Warning | BOI | 53 hr |
| Nov 25, 11:56 AM MST | High Wind Watch | BOI | 19 hr |
| Nov 26, 3:27 AM MST | Winter Weather Advisory | BOI | 38 hr |
| Nov 28, 3:27 AM MST | Winter Weather Advisory | BOI | 38 hr |
| Nov 30, 1:35 PM MST | Winter Weather Advisory | BOI | 49 hr |
| Dec 3, 9:45 AM MST | Air Stagnation Advisory | BOI | 3 days |
| Dec 13, 2:50 AM MST | Winter Weather Advisory | BOI | 30 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 | 6 |
| Mesoscale Discussion | 2 |
| Special Weather Statement | 20 |
| Flooding | |
| Flash Flood Watch | 1 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Weather Advisory | 12 |
| Cold | |
| Freeze Warning | 1 |
| Wind and dust | |
| High Wind Watch | 1 |
| Wind Advisory | 9 |
| Fire | |
| Red Flag Warning | 16 |
| Fire Weather Watch | 8 |
| Fog and smoke | |
| Air Stagnation Advisory | 5 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20182020
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.