Alert archive / Oregon / Dense Fog Advisories
Dense Fog Advisories in Oregon, 2025
61 dense fog advisories in 2025. 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 2025. Tap one for its archive.
- Dense Fog Advisories
- 61
- Busiest month
- November26 dense fog advisories
- Busiest day
- November 12, 20253 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 5, 9:23 PM PST | Dense Fog Advisory | PDT | Gilliam, Morrow, Sherman, Umatilla, Wasco, Wheeler | 16 hr |
| Jan 9, 12:48 AM PST | Dense Fog Advisory | MFR | Coos, Curry, Douglas, Jackson, Josephine | 9 hr |
| Jan 9, 12:55 AM PST | Dense Fog Advisory | PQR | Benton, Lane | 11 hr |
| Jan 9, 10:43 PM PST | Dense Fog Advisory | MFR | Coos, Curry, Douglas, Jackson, Josephine | 8 hr |
| Jan 9, 10:43 PM PST | Dense Fog Advisory | PQR | Lane | 4 hr |
| Jan 11, 2:10 AM PST | Dense Fog Advisory | BOI | Malheur | 8 hr |
| Jan 12, 11:12 PM PST | Dense Fog Advisory | PQR | Clackamas, Multnomah | 3 hr |
| Jan 14, 2:16 AM PST | Dense Fog Advisory | MFR | Coos, Douglas | 8 hr |
| Jan 15, 12:17 AM PST | Dense Fog Advisory | MFR | Coos, Douglas | 12 hr |
| Jan 15, 8:25 AM PST | Dense Fog Advisory | PQR | Clackamas, Lane, Multnomah, Washington, Yamhill | 4 hr |
| Jan 15, 7:43 PM PST | Dense Fog Advisory | PQR | Benton, Clackamas, Lane, Linn, Marion, Multnomah and 3 more | 31 hr |
| Jan 16, 12:09 AM PST | Dense Fog Advisory | MFR | Coos, Douglas | 12 hr |
| Jan 17, 7:38 AM PST | Dense Fog Advisory | PQR | Benton, Clackamas, Linn, Marion, Multnomah, Polk and 2 more | 4 hr |
| Feb 17, 9:46 PM PST | Dense Fog Advisory | BOI | Malheur | 14 hr |
| Feb 18, 7:26 PM PST | Dense Fog Advisory | PDT | Umatilla | 13 hr |
| Mar 25, 1:29 AM PDT | Dense Fog Advisory | PQR | Benton, Clatsop, Columbia, Lane, Lincoln, Polk and 3 more | 11 hr |
| Aug 12, 8:01 PM PDT | Dense Fog Advisory | PQR | Clatsop, Lane, Lincoln, Tillamook | 15 hr |
| Oct 3, 4:02 AM PDT | Dense Fog Advisory | PQR | Benton, Clackamas, Columbia, Lane, Linn, Marion and 4 more | 5 hr |
| Oct 21, 5:19 AM PDT | Dense Fog Advisory | PQR | Benton, Clackamas, Clatsop, Columbia, Lane, Lincoln and 7 more | 6 hr |
| Oct 27, 12:33 AM PDT | Dense Fog Advisory | MFR | Coos, Curry, Douglas, Jackson, Josephine | 7 hr |
| Oct 28, 6:01 AM PDT | Dense Fog Advisory | PDT | Union | 2 hr |
| Oct 29, 5:54 AM PDT | Dense Fog Advisory | PQR | Benton, Clackamas, Columbia, Lane, Linn, Marion and 4 more | 5 hr |
| Nov 2, 7:27 AM PST | Dense Fog Advisory | PQR | Benton, Clackamas, Clatsop, Columbia, Lane, Lincoln and 7 more | 4 hr |
| Nov 4, 3:04 AM PST | Dense Fog Advisory | PDT | Umatilla | 5 hr |
| Nov 4, 11:28 PM PST | Dense Fog Advisory | PDT | Crook, Deschutes, Jefferson, Umatilla | 9 hr |
| Nov 6, 8:06 PM PST | Dense Fog Advisory | MFR | Coos, Curry, Douglas, Jackson, Josephine | 7 hr |
| Nov 7, 5:02 PM PST | Dense Fog Advisory | MFR | Coos, Curry, Douglas, Jackson, Josephine, Klamath | 15 hr |
| Nov 10, 1:53 AM PST | Dense Fog Advisory | MFR | Coos, Curry, Douglas, Jackson, Josephine | 7 hr |
| Nov 10, 2:21 AM PST | Dense Fog Advisory | PQR | Lane | 8 hr |
| Nov 11, 1:00 AM PST | Dense Fog Advisory | MFR | Curry, Jackson, Josephine | 11 hr |
| Nov 11, 10:15 PM PST | Dense Fog Advisory | PDT | Umatilla | 11 hr |
| Nov 12, 3:19 AM PST | Dense Fog Advisory | PQR | Benton, Clackamas, Lane, Linn, Marion, Polk and 1 more | 8 hr |
| Nov 12, 6:14 AM PST | Dense Fog Advisory | MFR | Coos, Curry, Douglas, Jackson, Josephine | 4 hr |
| Nov 16, 7:33 AM PST | Dense Fog Advisory | PDT | Gilliam, Sherman, Wasco | 2 hr |
| Nov 18, 12:26 AM PST | Dense Fog Advisory | BOI | Malheur | 9 hr |
| Nov 21, 1:13 AM PST | Dense Fog Advisory | PQR | Benton, Clackamas, Columbia, Lane, Linn, Marion and 4 more | 10 hr |
| Nov 21, 1:38 AM PST | Dense Fog Advisory | PDT | Crook, Deschutes, Jefferson | 4 hr |
| Nov 21, 12:07 PM PST | Dense Fog Advisory | BOI | Baker | 21 hr |
| Nov 21, 5:52 PM PST | Dense Fog Advisory | PQR | Benton, Clackamas, Columbia, Lane, Linn, Marion and 4 more | 16 hr |
| Nov 21, 8:29 PM PST | Dense Fog Advisory | PDT | Morrow, Umatilla | 15 hr |
| Nov 22, 2:47 AM PST | Dense Fog Advisory | MFR | Curry, Jackson, Josephine | 7 hr |
| Nov 23, 12:14 AM PST | Dense Fog Advisory | BOI | Malheur | 9 hr |
| Nov 23, 1:29 AM PST | Dense Fog Advisory | MFR | Coos, Curry, Douglas, Jackson, Josephine | 9 hr |
| Nov 23, 1:34 AM PST | Dense Fog Advisory | PQR | Benton, Lane, Linn | 3 hr |
| Nov 26, 10:15 PM PST | Dense Fog Advisory | PDT | Crook, Deschutes, Gilliam, Grant, Jefferson, Morrow and 4 more | 12 hr |
| Nov 27, 2:13 AM PST | Dense Fog Advisory | BOI | Malheur | 8 hr |
| Nov 27, 9:05 PM PST | Dense Fog Advisory | BOI | Malheur | 11 hr |
| Nov 29, 7:34 AM PST | Dense Fog Advisory | MFR | Curry, Jackson, Josephine | 3 hr |
| Dec 1, 7:58 AM PST | Dense Fog Advisory | MFR | Curry, Jackson, Josephine | 3 hr |
| Dec 3, 9:51 AM PST | Dense Fog Advisory | PDT | Umatilla | 23 hr |
| Dec 6, 8:43 AM PST | Dense Fog Advisory | MFR | Jackson | 3 hr |
| Dec 10, 5:05 AM PST | Dense Fog Advisory | BOI | Baker | 5 hr |
| Dec 12, 2:26 AM PST | Dense Fog Advisory | PQR | Benton, Clackamas, Lane, Linn, Marion, Multnomah and 3 more | 8 hr |
| Dec 12, 7:05 PM PST | Dense Fog Advisory | PQR | Lane | 17 hr |
| Dec 13, 8:09 PM PST | Dense Fog Advisory | PQR | Benton, Lane, Linn | 11 hr |
| Dec 14, 4:16 AM PST | Dense Fog Advisory | BOI | Malheur | 6 hr |
| Dec 24, 6:13 AM PST | Dense Fog Advisory | PDT | Gilliam, Morrow, Sherman, Umatilla, Wasco, Wheeler | 5 hr |
| Dec 25, 5:03 AM PST | Dense Fog Advisory | PDT | Crook, Deschutes, Jefferson, Sherman, Wasco | 29 hr |
| Dec 28, 3:11 AM PST | Dense Fog Advisory | PQR | Benton, Clackamas, Columbia, Lane, Linn, Marion and 4 more | 6 hr |
| Dec 30, 4:24 AM PST | Dense Fog Advisory | PQR | Columbia, Lane | 6 hr |
| Dec 31, 4:37 AM PST | Dense Fog Advisory | PQR | Lane | 7 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Lane County21
- Benton County15
- Jackson County13
- Clackamas County13
- Yamhill County13
- Linn County13
- Curry County12
- Josephine County12
- Multnomah County12
- Washington County12
- Polk County12
- Coos County11
- Douglas County11
- Marion County11
- Umatilla County9
- Columbia County9
- Malheur County7
- Sherman County5
- Wasco County5
- Gilliam County4
- Morrow County4
- Clatsop County4
- Lincoln County4
- Tillamook County4
- Crook County4
- Deschutes County4
- Jefferson County4
- Wheeler County3
- Baker County2
- Union County1
- Klamath County1
- Grant County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20242026
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.