Alert archive / Oregon / Dense Fog Advisories
Dense Fog Advisories in Oregon, 2026
39 dense fog advisories in 2026. 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 in 2026. Tap one for its archive.
- Dense Fog Advisories
- 39
- Busiest month
- January22 dense fog advisories
- Busiest day
- January 14, 20264 dense fog advisories
Over time
By month
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 | Counties | Lasted |
|---|---|---|---|---|
| Jan 2, 6:36 PM PST | Dense Fog Advisory | BOI | Malheur | 11 hr |
| Jan 2, 10:41 PM PST | Dense Fog Advisory | PDT | Gilliam, Morrow, Sherman, Umatilla, Union, Wallowa and 2 more | 11 hr |
| Jan 5, 8:12 AM PST | Dense Fog Advisory | PDT | Gilliam, Sherman, Wasco | 108 min |
| Jan 5, 5:55 PM PST | Dense Fog Advisory | PQR | Clackamas, Marion | 10 hr |
| Jan 12, 2:45 PM PST | Dense Fog Advisory | PQR | Benton, Clackamas, Clatsop, Lane, Lincoln, Linn and 6 more | 23 hr |
| Jan 13, 11:56 AM PST | Dense Fog Advisory | BOI | Malheur | 23 hr |
| Jan 13, 2:56 PM PST | Dense Fog Advisory | PQR | Benton, Clackamas, Clatsop, Columbia, Lane, Lincoln and 7 more | 21 hr |
| Jan 13, 5:11 PM PST | Dense Fog Advisory | PDT | Morrow, Umatilla | 60 hr |
| Jan 14, 3:12 AM PST | Dense Fog Advisory | MFR | Coos, Douglas | 7 hr |
| Jan 14, 12:05 PM PST | Dense Fog Advisory | PQR | Benton, Clackamas, Clatsop, Lane, Lincoln, Linn and 6 more | 21 hr |
| Jan 14, 1:01 PM PST | Dense Fog Advisory | BOI | Malheur | 23 hr |
| Jan 15, 1:14 PM PST | Dense Fog Advisory | BOI | Malheur | 21 hr |
| Jan 15, 8:09 PM PST | Dense Fog Advisory | PQR | Benton, Lane, Linn | 16 hr |
| Jan 17, 1:14 AM PST | Dense Fog Advisory | PQR | Lane | 8 hr |
| Jan 18, 12:15 PM PST | Dense Fog Advisory | MFR | Coos, Douglas | 24 hr |
| Jan 19, 11:48 AM PST | Dense Fog Advisory | MFR | Coos, Douglas | 24 hr |
| Jan 20, 11:42 AM PST | Dense Fog Advisory | MFR | Coos, Douglas | 24 hr |
| Jan 21, 11:54 AM PST | Dense Fog Advisory | MFR | Coos, Douglas | 20 hr |
| Jan 30, 2:40 AM PST | Dense Fog Advisory | PDT | Gilliam, Morrow, Sherman, Umatilla, Wasco | 9 hr |
| Jan 30, 12:14 PM PST | Dense Fog Advisory | PDT | Morrow, Umatilla | 106 min |
| Jan 31, 12:14 AM PST | Dense Fog Advisory | PDT | Gilliam, Sherman, Wasco | 12 hr |
| Jan 31, 12:00 PM PST | Dense Fog Advisory | PDT | Gilliam, Morrow, Sherman, Umatilla, Wasco, Wheeler | 24 hr |
| Feb 3, 7:20 AM PST | Dense Fog Advisory | PDT | Umatilla | 4 hr |
| Feb 3, 9:00 PM PST | Dense Fog Advisory | PDT | Sherman, Wasco | 12 hr |
| Feb 4, 5:35 AM PST | Dense Fog Advisory | PQR | Benton, Clackamas, Lane, Linn, Marion | 6 hr |
| Feb 4, 9:36 PM PST | Dense Fog Advisory | PDT | Crook, Deschutes, Jefferson, Sherman, Wasco | 15 hr |
| Feb 5, 6:50 AM PST | Dense Fog Advisory | MFR | Coos, Curry, Douglas, Josephine | 5 hr |
| Feb 5, 7:24 AM PST | Dense Fog Advisory | PQR | Benton, Columbia, Lane, Linn | 4 hr |
| Feb 5, 11:04 AM PST | Dense Fog Advisory | PQR | Columbia, Lane | 95 min |
| Feb 5, 5:26 PM PST | Dense Fog Advisory | PDT | Crook, Deschutes, Jefferson, Sherman, Wasco | 94 min |
| Feb 5, 9:36 PM PST | Dense Fog Advisory | PDT | Umatilla | 10 hr |
| Feb 7, 6:06 AM PST | Dense Fog Advisory | PDT | Umatilla | 6 hr |
| Feb 10, 1:05 AM PST | Dense Fog Advisory | PQR | Benton, Clackamas, Columbia, Lane, Linn, Marion and 4 more | 7 hr |
| Feb 14, 9:04 PM PST | Dense Fog Advisory | PDT | Crook, Deschutes, Jefferson, Umatilla | 16 hr |
| Feb 15, 7:32 AM PST | Dense Fog Advisory | MFR | Jackson | 3 hr |
| Feb 15, 1:25 PM PST | Dense Fog Advisory | PDT | Crook, Deschutes, Gilliam, Jefferson, Morrow, Sherman and 3 more | 23 hr |
| Feb 25, 5:32 AM PST | Dense Fog Advisory | PQR | Clackamas, Clatsop, Columbia, Lincoln, Marion, Multnomah and 4 more | 6 hr |
| Feb 27, 3:35 AM PST | Dense Fog Advisory | PQR | Benton, Clackamas, Lane, Linn, Marion, Multnomah and 3 more | 8 hr |
| Mar 2, 7:11 AM PST | Dense Fog Advisory | PQR | Benton, Lane, Linn | 3 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Lane County11
- Umatilla County10
- Sherman County9
- Wasco County9
- Benton County9
- Linn County9
- Clackamas County8
- Marion County8
- Gilliam County6
- Morrow County6
- Multnomah County6
- Polk County6
- Washington County6
- Yamhill County6
- Coos County6
- Douglas County6
- Columbia County5
- Malheur County4
- Clatsop County4
- Lincoln County4
- Tillamook County4
- Crook County4
- Deschutes County4
- Jefferson County4
- Wheeler County3
- Union County1
- Wallowa County1
- Curry County1
- Josephine County1
- Jackson County1
The busiest days
Days with the most alerts issued, by UTC date.
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.