Alert archive / Idaho / Lewis County
Weather alerts in Lewis County, Idaho, 2018
34 weather alerts in 2018, 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 2018. Tap one for its archive.
- Alerts
- 34
- Warnings
- 4
- Watches
- 5
- Advisories
- 14
- Busiest month
- May9 alerts
- Busiest day
- May 26, 20183 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, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 0 | 0 | ||||
| Flash flood warnings | 0 | 1 | 0% |
Each office's whole area, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Missoula, MT: severe thunderstorm warnings | 11 | 9 | 18% | 17 | 76% | 18 min |
| NWS Missoula, MT: flash flood warnings | 1 | 0 | 100% | 0 | ||
| NWS Spokane, WA: severe thunderstorm warnings | 8 | 3 | 63% | 15 | 20% | 12 min |
| NWS Spokane, WA: flash flood warnings | 0 | 16 | 0% | |||
| 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 |
| 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, Pacific Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Feb 13, 1:01 PM PST | Winter Weather Advisory | OTX | 33 hr |
| Feb 15, 12:55 AM PST | Winter Weather Advisory | OTX | 6 hr |
| Feb 16, 2:41 AM PST | Wind Advisory | OTX | 42 hr |
| Feb 17, 1:09 PM PST | Winter Weather Advisory | OTX | 45 hr |
| Feb 23, 3:19 AM PST | Winter Weather Advisory | OTX | 36 hr |
| Mar 2, 2:48 AM PST | Winter Weather Advisory | OTX | 15 hr |
| Mar 16, 2:26 PM PDT | Winter Weather Advisory | OTX | 42 hr |
| Apr 1, 2:56 AM PDT | Winter Weather Advisory | OTX | 32 hr |
| Apr 11, 12:07 PM PDT | Winter Weather Advisory | OTX | 18 hr |
| May 6, 1:50 PM PDT | Mesoscale Discussion | SPC | 2 hr |
| May 19, 7:25 PM PDT | Special Weather Statement | MSO | 35 min |
| May 22, 4:58 PM PDT | Special Weather Statement | MSO | 32 min |
| May 22, 4:59 PM PDT | Special Weather Statement | MSO | 31 min |
| May 23, 3:27 PM PDT | Special Weather Statement | MSO | 18 min |
| May 25, 12:48 PM PDT | Flash Flood Watch | OTX | 10 hr |
| May 25, 7:21 PM PDT | Special Weather Statement | MSO | 24 min |
| May 25, 8:39 PM PDT | Special Weather Statement | MSO | 21 min |
| May 25, 8:50 PM PDT | Special Weather Statement | MSO | 40 min |
| Jun 3, 3:14 PM PDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 21, 10:12 AM PDT | Special Weather Statement | MSO | 33 min |
| Jun 21, 10:48 AM PDT | Special Weather Statement | MSO | 27 min |
| Jul 28, 11:59 AM PDT | Excessive Heat Watch | OTX | 26 hr |
| Jul 29, 2:01 PM PDT | Excessive Heat Warning | OTX | 54 hr |
| Aug 6, 1:53 AM PDT | Excessive Heat Watch | OTX | 37 hr |
| Aug 7, 2:26 PM PDT | Excessive Heat Warning | OTX | 3 days |
| Aug 7, 2:26 PM PDT | Heat Advisory | OTX | 3 days |
| Aug 8, 1:13 PM PDT | Fire Weather Watch | MSO | 24 hr |
| Aug 9, 1:23 PM PDT | Red Flag Warning | MSO | 3 days |
| Aug 15, 1:14 PM PDT | Fire Weather Watch | MSO | 24 hr |
| Aug 16, 1:26 PM PDT | Red Flag Warning | MSO | 37 hr |
| Nov 1, 2:22 PM PDT | Wind Advisory | OTX | 27 hr |
| Nov 16, 10:13 AM PST | Air Stagnation Advisory | OTX | 6 days |
| Nov 22, 2:27 PM PST | Winter Weather Advisory | OTX | 44 hr |
| Dec 26, 1:00 PM PST | Winter Weather Advisory | OTX | 19 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 | |
| Mesoscale Discussion | 2 |
| Special Weather Statement | 9 |
| Flooding | |
| Flash Flood Watch | 1 |
| Winter | |
| Winter Weather Advisory | 10 |
| Heat | |
| Excessive Heat Warning | 2 |
| Excessive Heat Watch | 2 |
| Heat Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 2 |
| Fire | |
| Red Flag Warning | 2 |
| Fire Weather Watch | 2 |
| 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 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.