Alert archive / Washington / Stevens County
Weather alerts in Stevens County, Washington, 2008
74 weather alerts in 2008, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Stevens County and its neighbors
Each county as a circle sized by its count in 2008. Tap one for its archive.
- Alerts
- 74
- Warnings
- 23
- Watches
- 16
- Advisories
- 32
- Busiest month
- December20 alerts
- Busiest day
- December 20, 20083 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Stevens County, 2008
| 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 | 0 | 0 |
Each office's whole area, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Spokane, WA: tornado warnings | 0 | 1 | 0% | |||
| NWS Spokane, WA: severe thunderstorm warnings | 31 | 15 | 52% | 27 | 85% | 22 min |
| NWS Spokane, WA: flash flood warnings | 4 | 1 | 75% | 6 | 17% | 52 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, Pacific Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 2, 2:42 PM PST | Snow Advisory | OTX | 24 hr |
| Jan 4, 3:42 AM PST | Heavy Snow Warning | OTX | 18 hr |
| Jan 6, 2:43 PM PST | Snow Advisory | OTX | 24 hr |
| Jan 6, 2:43 PM PST | Winter Storm Watch | OTX | 24 hr |
| Jan 7, 2:44 PM PST | Heavy Snow Warning | OTX | 43 hr |
| Jan 9, 2:46 PM PST | Snow Advisory | OTX | 30 hr |
| Jan 14, 1:34 PM PST | Snow and Blowing Snow Advisory | OTX | 19 hr |
| Jan 18, 2:35 PM PST | Snow and Blowing Snow Advisory | OTX | 44 hr |
| Jan 19, 7:02 PM PST | Winter Storm Warning | OTX | 15 hr |
| Jan 25, 10:04 PM PST | Heavy Snow Warning | OTX | 54 hr |
| Jan 25, 10:04 PM PST | Snow Advisory | OTX | 30 hr |
| Jan 28, 3:30 PM PST | Heavy Snow Warning | OTX | 37 hr |
| Jan 29, 3:18 PM PST | Winter Storm Watch | OTX | 13 hr |
| Jan 30, 4:06 AM PST | Winter Storm Warning | OTX | 3 days |
| Jan 31, 1:31 PM PST | Snow Advisory | OTX | 25 hr |
| Feb 1, 2:42 PM PST | Snow Advisory | OTX | 37 hr |
| Feb 3, 2:24 PM PST | Winter Storm Watch | OTX | 31 hr |
| Feb 4, 2:24 PM PST | Winter Storm Warning | OTX | 31 hr |
| Feb 6, 4:36 AM PST | Winter Storm Warning | OTX | 3 days |
| Feb 19, 10:42 AM PST | Air Stagnation Advisory | OTX | 8 days |
| Mar 3, 7:59 AM PST | Snow Advisory | OTX | 31 hr |
| Mar 13, 3:00 PM PDT | Winter Storm Watch | OTX | 23 hr |
| Mar 14, 2:25 PM PDT | Snow Advisory | OTX | 19 hr |
| Mar 21, 7:33 AM PDT | Snow Advisory | OTX | 7 hr |
| Mar 26, 2:15 PM PDT | Snow Advisory | OTX | 19 hr |
| Mar 27, 3:37 PM PDT | Winter Storm Watch | OTX | 12 hr |
| Mar 28, 3:44 AM PDT | Heavy Snow Warning | OTX | 37 hr |
| Apr 4, 2:48 PM PDT | Snow Advisory | OTX | 20 hr |
| Apr 14, 10:13 AM PDT | Areal Flood Advisory | OTX | 24 hr |
| Apr 18, 3:06 PM PDT | Winter Storm Watch | OTX | 45 hr |
| Apr 18, 9:01 PM PDT | Snow Advisory | OTX | 66 hr |
| Apr 22, 2:49 PM PDT | Snow Advisory | OTX | 20 hr |
| May 9, 8:20 AM PDT | Severe Thunderstorm Watch | SPC | 40 min |
| May 15, 1:45 PM PDT | Flood Watch | OTX | 31 hr |
| May 16, 12:42 PM PDT | River Flood Watch | PDT | 4 days |
| May 16, 8:00 PM PDT | Areal Flood Advisory | OTX | 6 days |
| May 16, 8:00 PM PDT | Areal Flood Advisory | OTX | 7 days |
| May 29, 5:36 PM PDT | Areal Flood Advisory | OTX | 5 hr |
| Jun 9, 2:44 PM PDT | Snow Advisory | OTX | 44 hr |
| Jul 1, 6:11 PM PDT | Severe Thunderstorm Warning | OTX | 64 min |
| Jul 1, 6:55 PM PDT | Severe Thunderstorm Warning | OTX | 65 min |
| Jul 3, 1:24 PM PDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 10, 5:08 PM PDT | Wind Advisory | OTX | 3 hr |
| Aug 18, 4:09 PM PDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 18, 8:57 PM PDT | Severe Thunderstorm Warning | OTX | 48 min |
| Aug 18, 9:25 PM PDT | Severe Thunderstorm Warning | OTX | 50 min |
| Aug 31, 1:16 PM PDT | Freeze Warning | OTX | 19 hr |
| Sep 8, 2:45 PM PDT | Wind Advisory | OTX | 30 hr |
| Sep 10, 2:38 PM PDT | Freeze Warning | OTX | 17 hr |
| Nov 10, 2:30 PM PST | Winter Storm Watch | OTX | 13 hr |
| Nov 14, 2:26 PM PST | Air Stagnation Advisory | OTX | 4 days |
| Nov 28, 11:07 AM PST | Air Stagnation Advisory | OTX | 5 days |
| Nov 29, 3:53 AM PST | Dense Fog Advisory | OTX | 7 hr |
| Nov 29, 5:58 PM PST | Dense Fog Advisory | OTX | 42 hr |
| Dec 5, 6:12 PM PST | Freezing Rain Advisory | OTX | 12 hr |
| Dec 6, 2:21 PM PST | Winter Weather Advisory | OTX | 23 hr |
| Dec 10, 3:31 PM PST | Winter Storm Watch | OTX | 47 hr |
| Dec 11, 3:29 PM PST | Winter Storm Warning | OTX | 71 hr |
| Dec 11, 4:58 PM PST | Dense Fog Advisory | OTX | 17 hr |
| Dec 13, 2:41 PM PST | Wind Chill Warning | OTX | 44 hr |
| Dec 15, 2:59 PM PST | Winter Storm Watch | OTX | 24 hr |
| Dec 16, 2:51 PM PST | Winter Storm Warning | OTX | 61 hr |
| Dec 17, 8:33 AM PST | Mesoscale Discussion | SPC | 6 hr |
| Dec 20, 3:16 AM PST | Winter Storm Warning | OTX | 9 days |
| Dec 20, 9:49 AM PST | Winter Storm Warning | OTX | 54 hr |
| Dec 20, 2:41 PM PST | Winter Weather Advisory | OTX | 43 hr |
| Dec 22, 3:30 PM PST | Winter Storm Watch | OTX | 23 hr |
| Dec 23, 2:11 PM PST | Winter Storm Warning | OTX | 53 hr |
| Dec 25, 3:11 PM PST | Winter Storm Watch | OTX | 14 hr |
| Dec 26, 5:13 AM PST | Winter Storm Warning | OTX | 4 days |
| Dec 27, 12:26 PM PST | Mesoscale Discussion | SPC | 3 hr |
| Dec 28, 3:35 PM PST | Winter Storm Warning | OTX | 30 hr |
| Dec 29, 2:47 PM PST | Winter Storm Watch | OTX | 24 hr |
| Dec 30, 2:50 PM PST | Winter Weather Advisory | OTX | 37 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 |
| Severe Thunderstorm Watch | 2 |
| Mesoscale Discussion | 3 |
| Flooding | |
| Flood Watch | 1 |
| River Flood Watch | 1 |
| Areal Flood Advisory | 4 |
| Winter | |
| Heavy Snow Warning | 5 |
| Winter Storm Warning | 11 |
| Winter Storm Watch | 12 |
| Freezing Rain Advisory | 1 |
| Snow Advisory | 14 |
| Snow and Blowing Snow Advisory | 2 |
| Winter Weather Advisory | 3 |
| Cold | |
| Freeze Warning | 2 |
| Wind Chill Warning | 1 |
| Wind and dust | |
| Wind Advisory | 2 |
| Fog and smoke | |
| Air Stagnation Advisory | 3 |
| Dense Fog Advisory | 3 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20072009
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.