Dense Fog Advisories in Washington
663 dense fog advisories since 1986. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of dense fog advisories reaches back to 2005.
Dense Fog Advisories by county
Each county as a circle sized by its count since 1986. Tap one for its archive.
- Dense Fog Advisories
- 663
- Busiest year
- 202366 dense fog advisories
- Average year
- 30over 22 years on file
Over time
By year
Before late 2005 the archive holds only tornado, severe thunderstorm, flash flood and marine warnings, and from 1997 SPC's watches, so the jump that year is the archive widening, not the weather.
By month of the year
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Lincoln County182
- Spokane County162
- Walla Walla County135
- Adams County126
- Grant County126
- Douglas County119
- Okanogan County117
- Columbia County98
- Yakima County97
- Klickitat County81
- Benton County69
- Franklin County69
- Kittitas County68
- Pend Oreille County61
- Stevens County61
- Whitman County51
- Chelan County25
- Cowlitz County25
- Asotin County23
- Garfield County23
- Clark County22
- Ferry County20
- Pacific County16
- Wahkiakum County9
- Mason County8
- Thurston County8
- San Juan County6
- King County6
- Lewis County6
- Pierce County6
- Snohomish County5
- Grays Harbor County4
- Skamania County3
- Island County3
- Jefferson County3
- Kitsap County3
- Skagit County3
- Whatcom County3
The latest dense fog advisories
The most recent on file, newest first.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 14, 4:57 AM PDT | Dense Fog Advisory | OTX | Adams, Chelan, Douglas, Grant, Lincoln, Okanogan | 5 hr |
| May 17, 7:22 AM PDT | Dense Fog Advisory | SEW | Grays Harbor, Lewis, Mason, Thurston | 2 hr |
| Feb 25, 5:32 AM PST | Dense Fog Advisory | PQR | Clark, Cowlitz | 6 hr |
| Feb 15, 1:25 PM PST | Dense Fog Advisory | PDT | Kittitas, Yakima | 23 hr |
| Feb 14, 9:04 PM PST | Dense Fog Advisory | PDT | Columbia, Walla Walla | 16 hr |
| Feb 14, 6:12 AM PST | Dense Fog Advisory | OTX | Adams, Douglas, Grant, Lincoln, Okanogan | 5 hr |
| Feb 12, 7:48 AM PST | Dense Fog Advisory | PDT | Benton, Franklin, Klickitat, Walla Walla | 4 hr |
| Feb 10, 2:39 AM PST | Dense Fog Advisory | SEW | Grays Harbor, Lewis, Mason, Thurston | 6 hr |
| Feb 10, 1:05 AM PST | Dense Fog Advisory | PQR | Clark, Cowlitz | 7 hr |
| Feb 8, 8:10 AM PST | Dense Fog Advisory | PDT | Yakima | 93 min |
| Feb 5, 5:57 PM PST | Dense Fog Advisory | OTX | Adams, Asotin, Douglas, Garfield, Grant, Lincoln and 3 more | 15 hr |
| Feb 5, 11:04 AM PST | Dense Fog Advisory | PQR | Cowlitz | 95 min |
Nearby
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.