Alert archive / Idaho / Cassia County
Weather alerts in Cassia County, Idaho, 2018
67 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Cassia County and its neighbors
Each county as a circle sized by its count in 2018. Tap one for its archive.
- Alerts
- 67
- Warnings
- 23
- Watches
- 5
- Advisories
- 15
- Busiest month
- May28 alerts
- Busiest day
- May 30, 20186 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Cassia County, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 14 | 5 | 64% | 5 | 80% | 14 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 Pocatello, ID: tornado warnings | 10 | 3 | 70% | 14 | 14% | 12 min |
| NWS Pocatello, ID: severe thunderstorm warnings | 65 | 20 | 69% | 106 | 70% | 17 min |
| NWS Pocatello, ID: flash flood warnings | 1 | 1 | 0% | 21 | 24% | 40 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 |
|---|---|---|---|
| Mar 11, 5:06 PM MDT | Special Weather Statement | PIH | 84 min |
| May 10, 3:37 PM MDT | Special Weather Statement | PIH | 38 min |
| May 10, 4:24 PM MDT | Special Weather Statement | PIH | 21 min |
| May 16, 2:11 PM MDT | Severe Thunderstorm Warning | PIH | 38 min |
| May 16, 2:25 PM MDT | Special Weather Statement | PIH | 50 min |
| May 17, 2:59 PM MDT | Special Weather Statement | PIH | 31 min |
| May 17, 4:13 PM MDT | Severe Thunderstorm Warning | PIH | 47 min |
| May 20, 12:31 PM MDT | Special Weather Statement | PIH | 59 min |
| May 20, 1:23 PM MDT | Severe Thunderstorm Warning | PIH | 67 min |
| May 20, 1:30 PM MDT | Severe Thunderstorm Warning | PIH | 60 min |
| May 20, 2:07 PM MDT | Severe Thunderstorm Warning | PIH | 38 min |
| May 20, 2:26 PM MDT | Severe Thunderstorm Warning | PIH | 49 min |
| May 22, 2:51 PM MDT | Special Weather Statement | PIH | 39 min |
| May 26, 2:49 PM MDT | Special Weather Statement | PIH | 41 min |
| May 26, 3:27 PM MDT | Severe Thunderstorm Warning | PIH | 33 min |
| May 26, 3:58 PM MDT | Severe Thunderstorm Warning | PIH | 32 min |
| May 26, 4:36 PM MDT | Severe Thunderstorm Warning | PIH | 24 min |
| May 30, 1:37 PM MDT | Special Weather Statement | PIH | 23 min |
| May 30, 1:48 PM MDT | Mesoscale Discussion | SPC | 117 min |
| May 30, 2:01 PM MDT | Severe Thunderstorm Warning | PIH | 44 min |
| May 30, 4:40 PM MDT | Special Weather Statement | PIH | 50 min |
| May 30, 5:28 PM MDT | Special Weather Statement | PIH | 47 min |
| May 30, 5:46 PM MDT | Severe Thunderstorm Warning | PIH | 29 min |
| May 31, 12:33 PM MDT | Mesoscale Discussion | SPC | 117 min |
| May 31, 1:10 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 31, 3:44 PM MDT | Special Weather Statement | PIH | 61 min |
| May 31, 4:30 PM MDT | Severe Thunderstorm Warning | PIH | 45 min |
| May 31, 4:35 PM MDT | Mesoscale Discussion | SPC | 85 min |
| May 31, 5:22 PM MDT | Severe Thunderstorm Warning | PIH | 38 min |
| May 31, 6:15 PM MDT | Special Weather Statement | PIH | 15 min |
| Jun 17, 12:17 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 13, 1:29 PM MDT | Fire Weather Watch | PIH | 25 hr |
| Jul 16, 2:13 PM MDT | Special Weather Statement | PIH | 47 min |
| Jul 24, 11:14 AM MDT | Red Flag Warning | PIH | 12 hr |
| Jul 31, 2:51 PM MDT | Red Flag Warning | PIH | 30 hr |
| Aug 9, 1:31 PM MDT | Heat Advisory | PIH | 55 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 17, 1:41 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 17, 2:45 PM MDT | Special Weather Statement | PIH | 45 min |
| Aug 19, 1:52 PM MDT | Red Flag Warning | PIH | 30 hr |
| Aug 22, 12:51 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 22, 3:12 PM MDT | Severe Thunderstorm Warning | PIH | 48 min |
| Sep 6, 12:29 PM MDT | Special Weather Statement | PIH | 31 min |
| 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, 8:33 AM MDT | Wind Advisory | PIH | 12 hr |
| Sep 15, 9:03 PM MDT | Wind Advisory | PIH | 117 min |
| Sep 24, 1:29 PM MDT | Frost Advisory | PIH | 20 hr |
| Sep 29, 8:37 AM MDT | Red Flag Warning | PIH | 11 hr |
| Oct 7, 3:55 AM MDT | Freeze Warning | PIH | 30 hr |
| Oct 7, 7:15 PM MDT | Special Weather Statement | PIH | 90 min |
| Oct 11, 2:11 PM MDT | Freeze Warning | PIH | 20 hr |
| Oct 12, 1:12 PM MDT | Frost Advisory | PIH | 20 hr |
| Oct 13, 9:28 AM MDT | Hard Freeze Warning | PIH | 26 hr |
| Nov 1, 2:50 AM MDT | Wind Advisory | PIH | 41 hr |
| Nov 2, 5:42 PM MDT | Special Weather Statement | PIH | 33 min |
| Nov 3, 2:05 AM MDT | Wind Advisory | PIH | 40 hr |
| Nov 22, 1:01 PM MST | Winter Weather Advisory | PIH | 41 hr |
| Dec 1, 3:27 AM MST | Winter Weather Advisory | PIH | 32 hr |
| Dec 10, 2:01 PM MST | Winter Weather Advisory | PIH | 48 hr |
| Dec 24, 4:50 AM MST | Winter Weather Advisory | PIH | 47 hr |
| Dec 26, 3:53 AM MST | Winter Weather Advisory | PIH | 40 hr |
| Dec 29, 1:01 PM MST | Winter Weather Advisory | PIH | 31 hr |
| Dec 29, 1:09 PM MST | Wind Advisory | PIH | 28 hr |
| Dec 29, 5:59 PM MST | Winter Weather Advisory | PIH | 3 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 | 14 |
| Severe Thunderstorm Watch | 2 |
| Mesoscale Discussion | 6 |
| Special Weather Statement | 18 |
| Winter | |
| Winter Weather Advisory | 7 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 2 |
| Hard Freeze Warning | 1 |
| Frost Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 5 |
| Fire | |
| Red Flag Warning | 6 |
| Fire Weather Watch | 3 |
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.