Dense Fog Advisory issued December 5 at 4:03PM PST until December 6 at 11:00AM PST by NWS Portland OR
* WHAT...For the Air Stagnation Advisory, light winds and limited air movement will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants over time. For the Dense Fog Advisory, visibility frequently below one quarter mile in dense fog and areas of freezing fog. * WHERE...South Willamette Valley. * WHEN...For the Air Stagnation Advisory, until 4 AM PST Saturday. For the Dense Fog Advisory, until 11 AM PST Friday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Fog
Dense Fog Advisory issued December 6 at 1:38AM MST until December 6 at 10:00AM MST by NWS Pocatello ID
* WHAT...Visibility less than one quarter of a mile in dense fog. * WHERE...Bear Lake Valley, including the towns of Montpelier, Paris, Georgetown, Bennington, Bloomington, Saint Charles, and Fish Haven. * WHEN...Until 10 AM MST this morning. * IMPACTS...Low visibility could make driving conditions hazardous. Dense fog can also deposit a thin layer of ice, commonly called Black Ice, on road surfaces and sidewalks, making them extremely slick.
Dense Fog Advisory issued December 6 at 1:25AM MST until December 7 at 11:00AM MST by NWS Boise ID
* WHAT...For the Dense Fog Advisory, visibility one quarter mile or less in dense fog. For the Air Stagnation Advisory in valleys, an extended period of stagnant air, with light winds and little vertical mixing. This is due to an inversion near the surface that will continue to trap pollutants. * WHERE...Treasure Valley Zones and the Weiser Basin. * WHEN...For the Dense Fog Advisory, until 11 AM MST Saturday. For the Air Stagnation Advisory, until 5 PM MST Saturday. * IMPACTS...Low visibility could make driving conditions hazardous. Poor air quality may cause issues for people with respiratory problems. * ADDITIONAL
Dense Fog Advisory issued December 5 at 10:49PM AKST until December 6 at 9:00AM AKST by NWS Fairbanks AK
* WHAT...Visibility down to 1/4 mile or less with dense fog in Fairbanks North Star Borough. * WHERE...Chatanika River Valley, Eielson AFB and Salcha, Fairbanks Metro Area, Goldstream Valley and Nenana Hills, Tanana Flats, Two Rivers, and Upper Chena River Valley. * WHEN...Until 9 AM AKST Friday. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Any wet surfaces from previous freezing rain and drizzle will freeze, making for very slick travel.
Dense Fog Advisory issued December 6 at 12:58AM PST until December 6 at 9:00AM PST by NWS Los Angeles/Oxnard CA
* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...The beaches and coastal sections of Los Angeles, Ventura, and southern Santa Barbara Counties. * WHEN...Until 9 AM PST this morning. * IMPACTS...Low visibility could make driving conditions hazardous.
Dense Fog Advisory issued December 5 at 8:58PM PST until December 6 at 9:00AM PST by NWS San Diego CA
* WHAT...Areas of visibility one quarter mile or less in dense fog. * WHERE...Orange County Coastal Areas, Orange County Inland Areas, San Diego County Coastal Areas, and San Diego County Valleys. * WHEN...Until 9 AM PST Friday. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Dense fog will be most widespread over the mesas of San Diego County and other higher coastal terrain in Orange and San Diego County. By sunrise Friday morning, the dense fog could reach locations near sea level.
Dense Fog Advisory issued December 5 at 7:58PM PST until December 6 at 12:00PM PST by NWS Hanford CA
* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...San Joaquin Valley * WHEN...Until noon PST Friday. * IMPACTS...Low visibility could make driving conditions hazardous.
Dense Fog Advisory issued December 4 at 7:39PM PST until December 5 at 10:00AM PST by NWS Seattle WA
* WHAT...Visibility one quarter to one half mile in areas of dense fog and localized freezing fog. * WHERE...Admiralty Inlet Area, Hood Canal Area, Western Skagit County, Western Whatcom County, Bremerton and Vicinity, Everett and Vicinity, Seattle and Vicinity, Southwest Interior, and Tacoma Area. * WHEN...Until 10 AM PST Thursday. * IMPACTS...Areas of low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Areas of sub-freezing temperatures into Thursday morning may cause localized freezing fog.
Dense Fog Advisory issued December 5 at 3:45AM CST until December 5 at 7:00AM CST by NWS Fort Worth TX
* WHAT...Visibility of one quarter mile or less in dense fog. * WHERE...Western portions of North and Central Texas. * WHEN...Until 7 AM CST this morning. * IMPACTS...Low visibility could make driving hazardous.
Dense Fog Advisory issued December 5 at 2:23AM CST until December 5 at 8:00AM CST by NWS San Angelo TX
* WHAT...Visibility 1/4 mile or less in dense fog. * WHERE...Brown, Callahan, Coleman, Concho, McCulloch, Nolan, Runnels, San Saba, Shackelford, and Taylor Counties. * WHEN...Until 8 AM CST this morning. * IMPACTS...Low visibility could make driving conditions hazardous.