Alert archive / Idaho / Washington County
Weather alerts in Washington County, Idaho, 2017
78 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Washington County and its neighbors
Each county as a circle sized by its count in 2017. Tap one for its archive.
- Alerts
- 78
- Warnings
- 30
- Watches
- 9
- Advisories
- 29
- Busiest month
- February15 alerts
- Busiest day
- February 10, 20173 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Washington County, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 4 | 1 | 75% | 1 | 0% | |
| Flash flood warnings | 2 | 0 | 100% | 0 |
Each office's whole area, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Boise, ID: severe thunderstorm warnings | 23 | 3 | 87% | 44 | 7% | 17 min |
| NWS Boise, ID: flash flood warnings | 8 | 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 3, 4:23 AM MST | Winter Storm Warning | BOI | 43 hr |
| Jan 3, 4:23 AM MST | Winter Weather Advisory | BOI | 11 hr |
| Jan 6, 2:24 PM MST | Wind Chill Warning | BOI | 19 hr |
| Jan 6, 2:24 PM MST | Winter Storm Warning | BOI | 43 hr |
| Jan 7, 2:30 PM MST | Winter Storm Warning | BOI | 33 hr |
| Jan 8, 9:13 AM MST | Ice Storm Warning | BOI | 14 hr |
| Jan 9, 3:44 AM MST | Winter Weather Advisory | BOI | 10 hr |
| Jan 9, 2:11 PM MST | Winter Storm Warning | BOI | 51 hr |
| Jan 13, 2:29 PM MST | Dense Fog Advisory | BOI | 19 hr |
| Jan 16, 3:00 PM MST | Winter Storm Watch | BOI | 25 hr |
| Jan 17, 4:49 AM MST | Winter Storm Warning | BOI | 54 hr |
| Jan 17, 4:49 AM MST | Winter Weather Advisory | BOI | 54 hr |
| Jan 19, 9:19 PM MST | Dense Fog Advisory | BOI | 14 hr |
| Jan 26, 9:35 PM MST | Dense Fog Advisory | BOI | 13 hr |
| Jan 31, 8:58 PM MST | Winter Storm Watch | BOI | 41 hr |
| Feb 2, 1:28 PM MST | Winter Storm Warning | BOI | 68 hr |
| Feb 2, 1:28 PM MST | Winter Weather Advisory | BOI | 25 hr |
| Feb 4, 1:00 PM MST | Areal Flood Advisory | BOI | 48 hr |
| Feb 6, 2:56 PM MST | Winter Weather Advisory | BOI | 26 hr |
| Feb 8, 10:46 AM MST | Areal Flood Warning | BOI | 57 hr |
| Feb 8, 11:04 AM MST | Areal Flood Advisory | BOI | 57 hr |
| Feb 10, 3:55 AM MST | Flash Flood Warning | BOI | 165 days |
| Feb 10, 6:45 AM MST | River Flood Warning | BOI | 28 hr |
| Feb 10, 11:09 AM MST | Areal Flood Warning | BOI | 24 hr |
| Feb 15, 4:29 AM MST | Dense Fog Advisory | BOI | 7 hr |
| Feb 15, 3:25 PM MST | Freezing Rain Advisory | BOI | 15 hr |
| Feb 19, 2:26 PM MST | River Flood Watch | BOI | 3 days |
| Feb 20, 1:25 AM MST | River Flood Warning | BOI | 65 hr |
| Feb 25, 2:48 PM MST | Winter Weather Advisory | BOI | 44 hr |
| Mar 8, 10:17 AM MST | River Flood Warning | BOI | 61 hr |
| Mar 8, 10:17 AM MST | River Flood Warning | BOI | 4 days |
| Mar 8, 12:01 PM MST | Flood Watch | BOI | 20 hr |
| Mar 9, 8:00 AM MST | Areal Flood Advisory | BOI | 36 hr |
| Mar 16, 12:11 AM MDT | River Flood Warning | BOI | 40 hr |
| Mar 17, 8:47 AM MDT | Areal Flood Advisory | BOI | 4 days |
| Mar 18, 12:29 AM MDT | River Flood Warning | BOI | 48 hr |
| Mar 19, 3:02 PM MDT | River Flood Warning | BOI | 3 days |
| Mar 19, 3:02 PM MDT | River Flood Warning | BOI | 9 days |
| Mar 21, 6:15 PM MDT | Special Weather Statement | BOI | 45 min |
| Mar 22, 3:06 AM MDT | River Flood Warning | BOI | 29 hr |
| Mar 28, 1:49 PM MDT | Wind Advisory | BOI | 58 hr |
| Mar 29, 3:00 PM MDT | River Flood Warning | BOI | 59 hr |
| Apr 1, 8:37 PM MDT | River Flood Warning | BOI | 28 hr |
| Apr 7, 1:00 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| May 5, 3:16 PM MDT | Mesoscale Discussion | SPC | 119 min |
| May 5, 6:06 PM MDT | Severe Thunderstorm Warning | BOI | 39 min |
| May 5, 6:46 PM MDT | Severe Thunderstorm Warning | BOI | 32 min |
| May 15, 3:04 PM MDT | Winter Weather Advisory | BOI | 24 hr |
| May 16, 4:09 PM MDT | Special Weather Statement | BOI | 51 min |
| May 16, 5:04 PM MDT | Special Weather Statement | BOI | 56 min |
| Jun 4, 3:28 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 4, 6:43 PM MDT | Severe Thunderstorm Warning | BOI | 20 min |
| Jun 26, 2:12 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 27, 12:22 AM MDT | Special Weather Statement | BOI | 23 min |
| Jul 6, 3:12 PM MDT | Heat Advisory | BOI | 3 days |
| Jul 13, 1:46 PM MDT | Fire Weather Watch | BOI | 25 hr |
| Aug 12, 6:32 PM MDT | Special Weather Statement | BOI | 43 min |
| Aug 21, 3:09 PM MDT | Fire Weather Watch | BOI | 23 hr |
| Aug 22, 2:32 PM MDT | Red Flag Warning | BOI | 33 hr |
| Aug 24, 10:38 AM MDT | Red Flag Warning | BOI | 13 hr |
| Aug 24, 2:14 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 24, 4:23 PM MDT | Severe Thunderstorm Warning | BOI | 37 min |
| Aug 29, 8:29 AM MDT | Fire Weather Watch | BOI | 24 hr |
| Aug 30, 8:26 AM MDT | Red Flag Warning | BOI | 17 hr |
| Sep 7, 8:12 AM MDT | Fire Weather Watch | BOI | 24 hr |
| Sep 8, 8:19 AM MDT | Red Flag Warning | BOI | 16 hr |
| Sep 8, 2:34 PM MDT | Fire Weather Watch | BOI | 18 hr |
| Oct 7, 2:38 PM MDT | Frost Advisory | BOI | 42 hr |
| Nov 11, 2:46 AM MST | Dense Fog Advisory | BOI | 7 hr |
| Nov 23, 12:04 AM MST | Dense Fog Advisory | BOI | 13 hr |
| Dec 2, 4:06 AM MST | Winter Weather Advisory | BOI | 34 hr |
| Dec 18, 2:36 PM MST | Winter Weather Advisory | BOI | 44 hr |
| Dec 22, 11:02 AM MST | Winter Weather Advisory | BOI | 27 hr |
| Dec 23, 2:58 PM MST | Winter Weather Advisory | BOI | 43 hr |
| Dec 26, 1:21 AM MST | Dense Fog Advisory | BOI | 12 hr |
| Dec 27, 3:03 PM MST | Winter Weather Advisory | BOI | 41 hr |
| Dec 28, 3:02 AM MST | Dense Fog Advisory | BOI | 8 hr |
| Dec 29, 9:01 PM MST | Winter Weather Advisory | BOI | 13 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 | 4 |
| Mesoscale Discussion | 5 |
| Special Weather Statement | 5 |
| Flooding | |
| Areal Flood Warning | 2 |
| Flash Flood Warning | 1 |
| River Flood Warning | 11 |
| Flood Watch | 1 |
| River Flood Watch | 1 |
| Areal Flood Advisory | 4 |
| Winter | |
| Ice Storm Warning | 1 |
| Winter Storm Warning | 6 |
| Winter Storm Watch | 2 |
| Freezing Rain Advisory | 1 |
| Winter Weather Advisory | 13 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Wind Chill Warning | 1 |
| Frost Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 1 |
| Fire | |
| Red Flag Warning | 4 |
| Fire Weather Watch | 5 |
| Fog and smoke | |
| Dense Fog Advisory | 8 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20162018
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.