Alert archive / Idaho / Clark County
Weather alerts in Clark County, Idaho, 2020
124 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Clark County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 124
- Warnings
- 33
- Watches
- 16
- Advisories
- 24
- Busiest month
- August36 alerts
- Busiest day
- August 19, 20208 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Clark County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 7 | 3 | 57% | 2 | 50% | 41 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Pocatello, ID: tornado warnings | 5 | 0 | 100% | 0 | ||
| NWS Pocatello, ID: severe thunderstorm warnings | 52 | 19 | 63% | 158 | 41% | 21 min |
| NWS Pocatello, 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 |
|---|---|---|---|
| Dec 31, 11:19 PM MST | Special Weather Statement | TFX | 41 min |
| Jan 9, 2:57 AM MST | Winter Storm Watch | PIH | 31 hr |
| Jan 10, 9:45 AM MST | Winter Storm Warning | PIH | 5 days |
| Jan 10, 9:45 AM MST | Winter Weather Advisory | PIH | 34 hr |
| Jan 13, 1:07 PM MST | Winter Weather Advisory | PIH | 33 hr |
| Jan 15, 2:00 PM MST | Winter Weather Advisory | PIH | 52 hr |
| Jan 26, 8:15 PM MST | Special Weather Statement | PIH | 2 hr |
| Feb 1, 3:46 AM MST | Winter Storm Watch | PIH | 11 hr |
| Feb 1, 2:45 PM MST | Winter Weather Advisory | PIH | 51 hr |
| Feb 2, 9:20 PM MST | Special Weather Statement | PIH | 3 hr |
| Feb 4, 3:28 AM MST | Winter Storm Watch | PIH | 11 hr |
| Feb 4, 2:35 PM MST | Winter Storm Warning | PIH | 60 hr |
| Feb 4, 2:35 PM MST | Winter Weather Advisory | PIH | 72 hr |
| Feb 14, 1:45 PM MST | Winter Storm Warning | PIH | 56 hr |
| Feb 23, 4:10 AM MST | Wind Advisory | PIH | 22 hr |
| Feb 23, 9:20 PM MST | Special Weather Statement | PIH | 115 min |
| Mar 13, 3:21 AM MDT | Winter Storm Watch | PIH | 10 hr |
| Mar 13, 1:32 PM MDT | Winter Weather Advisory | PIH | 52 hr |
| Mar 29, 2:05 PM MDT | Winter Weather Advisory | PIH | 52 hr |
| Apr 14, 2:15 PM MDT | Winter Weather Advisory | PIH | 43 hr |
| Apr 30, 1:44 PM MDT | Special Weather Statement | TFX | 46 min |
| Apr 30, 2:34 PM MDT | Special Weather Statement | TFX | 41 min |
| Apr 30, 4:47 PM MDT | Severe Thunderstorm Warning | PIH | 28 min |
| Apr 30, 5:16 PM MDT | Special Weather Statement | PIH | 44 min |
| Apr 30, 5:36 PM MDT | Special Weather Statement | TFX | 39 min |
| Apr 30, 5:46 PM MDT | Severe Thunderstorm Warning | PIH | 44 min |
| Apr 30, 6:25 PM MDT | Special Weather Statement | TFX | 50 min |
| Apr 30, 6:34 PM MDT | Special Weather Statement | PIH | 41 min |
| May 5, 2:03 PM MDT | High Wind Warning | PIH | 31 hr |
| May 5, 2:03 PM MDT | Wind Advisory | PIH | 31 hr |
| May 29, 2:12 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 30, 1:45 PM MDT | Mesoscale Discussion | SPC | 90 min |
| May 30, 8:11 PM MDT | Special Weather Statement | PIH | 64 min |
| May 30, 9:04 PM MDT | Severe Thunderstorm Warning | PIH | 41 min |
| May 30, 9:54 PM MDT | Special Weather Statement | TFX | 51 min |
| Jun 3, 2:34 PM MDT | Special Weather Statement | PIH | 41 min |
| Jun 6, 7:22 PM MDT | Special Weather Statement | PIH | 38 min |
| Jun 7, 1:57 AM MDT | Wind Advisory | PIH | 19 hr |
| Jun 7, 2:35 AM MDT | Winter Weather Advisory | PIH | 33 hr |
| Jun 11, 1:34 PM MDT | Wind Advisory | PIH | 52 hr |
| Jun 15, 1:13 PM MDT | Winter Weather Advisory | PIH | 47 hr |
| Jun 16, 6:00 PM MDT | Special Weather Statement | TFX | 30 min |
| Jun 16, 6:49 PM MDT | Special Weather Statement | TFX | 26 min |
| Jun 16, 7:25 PM MDT | Special Weather Statement | TFX | 35 min |
| Jun 16, 8:08 PM MDT | Special Weather Statement | TFX | 52 min |
| Jun 16, 8:53 PM MDT | Special Weather Statement | TFX | 22 min |
| Jun 24, 2:21 PM MDT | Special Weather Statement | TFX | 39 min |
| Jun 24, 2:29 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 29, 5:11 PM MDT | Special Weather Statement | PIH | 49 min |
| Jul 1, 2:12 AM MDT | Wind Advisory | PIH | 18 hr |
| Jul 1, 1:52 PM MDT | Special Weather Statement | PIH | 38 min |
| Jul 1, 1:56 PM MDT | Special Weather Statement | TFX | 34 min |
| Jul 3, 4:07 PM MDT | Special Weather Statement | PIH | 38 min |
| Jul 3, 4:45 PM MDT | Special Weather Statement | PIH | 45 min |
| Jul 3, 7:12 PM MDT | Special Weather Statement | PIH | 48 min |
| Jul 7, 6:06 PM MDT | Special Weather Statement | TFX | 24 min |
| Jul 16, 1:52 PM MDT | Red Flag Warning | PIH | 31 hr |
| Jul 17, 1:09 PM MDT | Red Flag Warning | PIH | 32 hr |
| Jul 20, 2:10 PM MDT | Fire Weather Watch | PIH | 23 hr |
| Jul 21, 12:48 PM MDT | Red Flag Warning | PIH | 32 hr |
| Jul 23, 4:08 PM MDT | Special Weather Statement | TFX | 37 min |
| Jul 25, 2:07 PM MDT | Special Weather Statement | PIH | 68 min |
| Jul 25, 3:17 PM MDT | Special Weather Statement | PIH | 58 min |
| Jul 26, 1:07 PM MDT | Fire Weather Watch | PIH | 25 hr |
| Jul 27, 1:52 PM MDT | Red Flag Warning | PIH | 28 hr |
| Aug 1, 2:42 PM MDT | Special Weather Statement | TFX | 33 min |
| Aug 1, 3:17 PM MDT | Special Weather Statement | TFX | 28 min |
| Aug 2, 12:54 PM MDT | Red Flag Warning | PIH | 32 hr |
| Aug 3, 3:11 PM MDT | Special Weather Statement | PIH | 79 min |
| Aug 3, 3:20 PM MDT | Special Weather Statement | TFX | 25 min |
| Aug 3, 3:59 PM MDT | Special Weather Statement | TFX | 31 min |
| Aug 3, 5:36 PM MDT | Mesoscale Discussion | SPC | 114 min |
| Aug 5, 1:14 PM MDT | Red Flag Warning | PIH | 32 hr |
| Aug 7, 11:52 AM MDT | Red Flag Warning | PIH | 33 hr |
| Aug 9, 12:03 PM MDT | Fire Weather Watch | PIH | 24 hr |
| Aug 10, 11:47 AM MDT | Fire Weather Watch | PIH | 25 hr |
| Aug 10, 11:47 AM MDT | Red Flag Warning | PIH | 33 hr |
| Aug 11, 12:35 PM MDT | Red Flag Warning | PIH | 32 hr |
| Aug 12, 12:34 PM MDT | Fire Weather Watch | PIH | 13 hr |
| Aug 13, 1:04 AM MDT | Red Flag Warning | PIH | 20 hr |
| Aug 17, 12:22 PM MDT | Red Flag Warning | PIH | 34 hr |
| Aug 18, 2:26 PM MDT | Red Flag Warning | PIH | 28 hr |
| Aug 19, 1:41 PM MDT | Red Flag Warning | PIH | 31 hr |
| Aug 19, 2:45 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 19, 3:05 PM MDT | Mesoscale Discussion | SPC | 115 min |
| Aug 19, 5:01 PM MDT | Special Weather Statement | PIH | 44 min |
| Aug 19, 5:12 PM MDT | Special Weather Statement | TFX | 33 min |
| Aug 19, 5:15 PM MDT | Severe Thunderstorm Warning | PIH | 30 min |
| Aug 19, 5:42 PM MDT | Special Weather Statement | PIH | 33 min |
| Aug 19, 5:49 PM MDT | Special Weather Statement | TFX | 26 min |
| Aug 25, 3:28 AM MDT | Red Flag Warning | PIH | 18 hr |
| Aug 25, 1:18 PM MDT | Mesoscale Discussion | SPC | 117 min |
| Aug 25, 5:54 PM MDT | Severe Thunderstorm Warning | PIH | 36 min |
| Aug 25, 5:58 PM MDT | Special Weather Statement | PIH | 47 min |
| Aug 26, 3:29 AM MDT | Red Flag Warning | PIH | 41 hr |
| Aug 26, 2:44 PM MDT | Mesoscale Discussion | SPC | 91 min |
| Aug 26, 6:11 PM MDT | Special Weather Statement | TFX | 34 min |
| Aug 26, 7:04 PM MDT | Mesoscale Discussion | SPC | 116 min |
| Aug 27, 3:38 AM MDT | Special Weather Statement | TFX | 52 min |
| Aug 28, 2:22 AM MDT | Fire Weather Watch | PIH | 10 hr |
| Aug 28, 12:34 PM MDT | Red Flag Warning | PIH | 56 hr |
| Sep 3, 1:36 PM MDT | Fire Weather Watch | PIH | 25 hr |
| Sep 4, 1:11 AM MDT | Fire Weather Watch | PIH | 14 hr |
| Sep 4, 3:03 PM MDT | Red Flag Warning | PIH | 30 hr |
| Sep 4, 3:03 PM MDT | Red Flag Warning | PIH | 54 hr |
| Sep 5, 1:45 PM MDT | High Wind Watch | PIH | 24 hr |
| Sep 6, 2:23 AM MDT | Red Flag Warning | PIH | 43 hr |
| Sep 6, 1:42 PM MDT | High Wind Warning | PIH | 40 hr |
| Sep 6, 1:42 PM MDT | Wind Advisory | PIH | 40 hr |
| Sep 8, 5:45 AM MDT | Wind Advisory | PIH | 8 hr |
| Sep 15, 2:06 PM MDT | Fire Weather Watch | PIH | 24 hr |
| Sep 16, 1:50 PM MDT | Red Flag Warning | PIH | 55 hr |
| Sep 19, 4:08 PM MDT | Severe Thunderstorm Warning | PIH | 23 min |
| Sep 19, 4:29 PM MDT | Severe Thunderstorm Warning | PIH | 46 min |
| Oct 9, 1:58 PM MDT | Wind Advisory | PIH | 52 hr |
| Oct 23, 2:34 AM MDT | Winter Weather Advisory | PIH | 42 hr |
| Nov 6, 4:05 AM MST | Winter Storm Watch | PIH | 23 hr |
| Nov 7, 2:54 AM MST | Winter Weather Advisory | PIH | 38 hr |
| Nov 11, 2:19 PM MST | Winter Storm Watch | PIH | 25 hr |
| Nov 12, 3:26 PM MST | Winter Storm Warning | PIH | 35 hr |
| Nov 12, 3:26 PM MST | Winter Weather Advisory | PIH | 46 hr |
| Nov 14, 2:36 PM MST | Winter Weather Advisory | PIH | 32 hr |
| Dec 1, 1:34 PM MST | Air Stagnation Advisory | PIH | 8 days |
| Dec 25, 1:31 PM MST | Winter Weather Advisory | PIH | 39 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 | 7 |
| Mesoscale Discussion | 9 |
| Special Weather Statement | 42 |
| Winter | |
| Winter Storm Warning | 4 |
| Winter Storm Watch | 6 |
| Winter Weather Advisory | 15 |
| Wind and dust | |
| High Wind Warning | 2 |
| High Wind Watch | 1 |
| Wind Advisory | 8 |
| Fire | |
| Red Flag Warning | 20 |
| Fire Weather Watch | 9 |
| Fog and smoke | |
| Air Stagnation Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20192021
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.