Alert archive / Idaho / Lewis County
Weather alerts in Lewis County, Idaho, 2020
57 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Lewis County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 57
- Warnings
- 3
- Watches
- 7
- Advisories
- 25
- Busiest month
- June11 alerts
- Busiest day
- June 6, 20206 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Lewis County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 1 | 0 | 100% | 0 | ||
| 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 Spokane, WA: severe thunderstorm warnings | 20 | 13 | 35% | 49 | 47% | 15 min |
| NWS Spokane, WA: flash flood warnings | 1 | 0 | 100% | 4 | 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, Pacific Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 9, 3:15 PM PST | Winter Weather Advisory | OTX | 43 hr |
| Jan 11, 2:59 PM PST | Winter Weather Advisory | OTX | 37 hr |
| Jan 13, 5:10 AM PST | Winter Weather Advisory | OTX | 3 days |
| Jan 16, 1:24 PM PST | Winter Weather Advisory | OTX | 14 hr |
| Jan 31, 2:18 PM PST | Wind Advisory | OTX | 28 hr |
| Feb 1, 2:25 PM PST | Winter Weather Advisory | OTX | 14 hr |
| Feb 3, 2:31 PM PST | Winter Storm Watch | OTX | 20 hr |
| Feb 3, 2:31 PM PST | Winter Weather Advisory | OTX | 51 hr |
| Feb 5, 6:16 PM PST | Winter Weather Advisory | OTX | 37 hr |
| Feb 6, 1:47 PM PST | Areal Flood Advisory | OTX | 24 hr |
| Feb 7, 2:54 AM PST | Winter Weather Advisory | OTX | 40 hr |
| Feb 7, 1:49 PM PST | Areal Flood Advisory | OTX | 24 hr |
| Feb 8, 1:43 PM PST | Areal Flood Advisory | OTX | 22 hr |
| Feb 14, 2:42 PM PST | Winter Weather Advisory | OTX | 67 hr |
| Feb 23, 2:26 AM PST | Wind Advisory | OTX | 28 hr |
| Mar 29, 2:39 PM PDT | Winter Weather Advisory | OTX | 44 hr |
| May 2, 1:19 PM PDT | Mesoscale Discussion | SPC | 2 hr |
| May 12, 3:13 PM PDT | Special Weather Statement | MSO | 17 min |
| May 17, 2:01 PM PDT | Mesoscale Discussion | SPC | 119 min |
| May 19, 9:59 AM PDT | Flood Watch | OTX | 43 hr |
| May 30, 4:22 PM PDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 30, 8:06 PM PDT | Mesoscale Discussion | SPC | 114 min |
| May 30, 8:24 PM PDT | Special Weather Statement | MSO | 36 min |
| May 30, 8:36 PM PDT | Special Weather Statement | MSO | 39 min |
| May 31, 1:38 AM PDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 5, 12:46 PM PDT | Mesoscale Discussion | SPC | 119 min |
| Jun 5, 4:32 PM PDT | Special Weather Statement | MSO | 43 min |
| Jun 5, 4:36 PM PDT | Special Weather Statement | OTX | 54 min |
| Jun 5, 5:23 PM PDT | Special Weather Statement | MSO | 52 min |
| Jun 5, 5:29 PM PDT | Special Weather Statement | OTX | 31 min |
| Jun 5, 5:47 PM PDT | Special Weather Statement | OTX | 43 min |
| Jun 5, 6:20 PM PDT | Special Weather Statement | MSO | 40 min |
| Jun 5, 6:25 PM PDT | Special Weather Statement | OTX | 35 min |
| Jun 5, 7:42 PM PDT | Special Weather Statement | OTX | 63 min |
| Jun 12, 5:00 PM PDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 27, 1:03 PM PDT | Flood Watch | OTX | 20 hr |
| Jul 26, 2:54 AM PDT | Heat Advisory | OTX | 6 days |
| Aug 13, 2:13 PM PDT | Excessive Heat Watch | OTX | 24 hr |
| Aug 14, 2:37 PM PDT | Excessive Heat Warning | OTX | 4 days |
| Aug 17, 3:19 PM PDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 17, 4:27 PM PDT | Mesoscale Discussion | SPC | 93 min |
| Aug 17, 6:25 PM PDT | Severe Thunderstorm Warning | OTX | 6 min |
| Aug 17, 7:46 PM PDT | Special Weather Statement | MSO | 44 min |
| Aug 19, 12:18 AM PDT | Special Weather Statement | OTX | 42 min |
| Aug 19, 12:38 AM PDT | Special Weather Statement | MSO | 67 min |
| Aug 19, 12:48 AM PDT | Special Weather Statement | OTX | 27 min |
| Aug 27, 1:47 PM PDT | Fire Weather Watch | MSO | 24 hr |
| Aug 28, 1:19 PM PDT | Red Flag Warning | MSO | 34 hr |
| Oct 13, 2:42 AM PDT | Wind Advisory | OTX | 18 hr |
| Oct 23, 11:21 AM PDT | Winter Weather Advisory | OTX | 22 hr |
| Oct 26, 10:49 AM PDT | Air Stagnation Advisory | OTX | 4 days |
| Nov 7, 1:20 AM PST | Winter Weather Advisory | OTX | 35 hr |
| Nov 9, 2:09 AM PST | Winter Weather Advisory | OTX | 48 hr |
| Nov 12, 2:17 PM PST | Winter Weather Advisory | OTX | 24 hr |
| Nov 30, 2:32 PM PST | Air Stagnation Advisory | OTX | 9 days |
| Dec 21, 4:07 AM PST | Wind Advisory | OTX | 24 hr |
| Dec 29, 4:03 AM PST | Winter Weather Advisory | OTX | 58 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 | 1 |
| Severe Thunderstorm Watch | 2 |
| Mesoscale Discussion | 7 |
| Special Weather Statement | 15 |
| Flooding | |
| Flood Watch | 2 |
| Areal Flood Advisory | 3 |
| Winter | |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 15 |
| Heat | |
| Excessive Heat Warning | 1 |
| Excessive Heat Watch | 1 |
| Heat Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 4 |
| Fire | |
| Red Flag Warning | 1 |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Air Stagnation Advisory | 2 |
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.