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Home Return to list Dense Fog Advisory 0020 Issued by the Portland Forecast Office
Action: New Issued At: 2026-10-31 20:41:04 551 WWUS76 KPQR 010140 NPWPQR URGENT - WEATHER MESSAGE National Weather Service Portland OR 640 PM PDT Sat Oct 31 2026 ORZ108-109-111-112-114-115-WAZ204>207-011800- /O.NEW.KPQR.FG.Y.0020.261101T0900Z-261101T1800Z/ Lower Columbia River-Tualatin Valley-Inner Portland Metro-East Portland Metro-West Central Willamette Valley-East Central Willamette Valley-Cowlitz County Lowlands-North Clark County Lowlands-Inner Vancouver Metro-East Clark County Lowlands- Including the cities of Oregon City, Lake Oswego, Camas, Woodburn, Castle Rock, Sheridan, Portland, Happy Valley, Kelso, Gresham, Salem, Stayton, La Center, Monmouth, Tigard, Scappoose, Hockinson, Sellwood, Molalla, Fairview, Longview, Newberg, Ridgefield, Washougal, Kalama, Clatskanie, Keizer, Woodland, Brush Prairie, Battle Ground, Vancouver, Salmon Creek, Forest Grove, Hillsboro, St. Helens, Wilsonville, Evergreen, Silverton, Sherwood, Rockcreek, Dallas, Rainier, McMinnville, Eagle Creek, and Troutdale 640 PM PDT Sat Oct 31 2026 ...DENSE FOG ADVISORY IN EFFECT FROM 1 AM TO 10 AM PST SUNDAY... * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...In Oregon, East Central Willamette Valley, East Portland Metro, Inner Portland Metro, Lower Columbia River, Tualatin Valley, and West Central Willamette Valley. In Washington, Cowlitz County Lowlands, East Clark County Lowlands, Inner Vancouver Metro, and North Clark County Lowlands. * WHEN...From 1 AM to 10 AM PST Sunday. * IMPACTS...Low visibility could make driving conditions hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down and leave plenty of distance ahead of you. Pedestrians and cyclists should wear bright or reflective clothing to increase the chances of being seen by others in poor visibility conditions. && $$ Action: Continued Issued At: 2026-11-01 00:39:42 136 WWUS76 KPQR 010539 NPWPQR URGENT - WEATHER MESSAGE National Weather Service Portland OR 1039 PM PDT Sat Oct 31 2026 ORZ116>118-011800- /O.EXA.KPQR.FG.Y.0020.261101T0900Z-261101T1800Z/ Benton County Lowlands-Linn County Lowlands-Lane County Lowlands- Including the cities of Philomath, Lebanon, Eugene, Monroe, Corvallis, Albany, Harrisburg, Junction City, Cottage Grove, Creswell, Springfield, and Brownsville 1039 PM PDT Sat Oct 31 2026 ...DENSE FOG ADVISORY IN EFFECT FROM 1 AM TO 10 AM PST SUNDAY... * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Benton County Lowlands, Lane County Lowlands, and Linn County Lowlands. * WHEN...From 1 AM to 10 AM PST Sunday. * IMPACTS...Low visibility could make driving conditions hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down and leave plenty of distance ahead of you. Pedestrians and cyclists should wear bright or reflective clothing to increase the chances of being seen by others in poor visibility conditions. && $$ ORZ108-109-111-112-114-115-WAZ204>207-011800- /O.CON.KPQR.FG.Y.0020.261101T0900Z-261101T1800Z/ Lower Columbia River-Tualatin Valley-Inner Portland Metro-East Portland Metro-West Central Willamette Valley-East Central Willamette Valley-Cowlitz County Lowlands-North Clark County Lowlands-Inner Vancouver Metro-East Clark County Lowlands- Including the cities of Oregon City, Lake Oswego, Camas, Woodburn, Castle Rock, Sheridan, Portland, Happy Valley, Kelso, Gresham, Salem, Stayton, La Center, Monmouth, Tigard, Scappoose, Hockinson, Sellwood, Molalla, Fairview, Longview, Newberg, Ridgefield, Washougal, Kalama, Clatskanie, Keizer, Woodland, Brush Prairie, Battle Ground, Vancouver, Salmon Creek, Forest Grove, Hillsboro, St. Helens, Wilsonville, Evergreen, Silverton, Sherwood, Rockcreek, Dallas, Rainier, McMinnville, Eagle Creek, and Troutdale 1039 PM PDT Sat Oct 31 2026 ...DENSE FOG ADVISORY REMAINS IN EFFECT FROM 1 AM TO 10 AM PST SUNDAY... * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...In Oregon, East Central Willamette Valley, East Portland Metro, Inner Portland Metro, Lower Columbia River, Tualatin Valley, and West Central Willamette Valley. In Washington, Cowlitz County Lowlands, East Clark County Lowlands, Inner Vancouver Metro, and North Clark County Lowlands. * WHEN...From 1 AM to 10 AM PST Sunday. * IMPACTS...Low visibility could make driving conditions hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down and leave plenty of distance ahead of you. Pedestrians and cyclists should wear bright or reflective clothing to increase the chances of being seen by others in poor visibility conditions. && $$ Action: Area Extended Issued At: 2026-11-01 00:39:42 136 WWUS76 KPQR 010539 NPWPQR URGENT - WEATHER MESSAGE National Weather Service Portland OR 1039 PM PDT Sat Oct 31 2026 ORZ116>118-011800- /O.EXA.KPQR.FG.Y.0020.261101T0900Z-261101T1800Z/ Benton County Lowlands-Linn County Lowlands-Lane County Lowlands- Including the cities of Philomath, Lebanon, Eugene, Monroe, Corvallis, Albany, Harrisburg, Junction City, Cottage Grove, Creswell, Springfield, and Brownsville 1039 PM PDT Sat Oct 31 2026 ...DENSE FOG ADVISORY IN EFFECT FROM 1 AM TO 10 AM PST SUNDAY... * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Benton County Lowlands, Lane County Lowlands, and Linn County Lowlands. * WHEN...From 1 AM to 10 AM PST Sunday. * IMPACTS...Low visibility could make driving conditions hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down and leave plenty of distance ahead of you. Pedestrians and cyclists should wear bright or reflective clothing to increase the chances of being seen by others in poor visibility conditions. && $$ ORZ108-109-111-112-114-115-WAZ204>207-011800- /O.CON.KPQR.FG.Y.0020.261101T0900Z-261101T1800Z/ Lower Columbia River-Tualatin Valley-Inner Portland Metro-East Portland Metro-West Central Willamette Valley-East Central Willamette Valley-Cowlitz County Lowlands-North Clark County Lowlands-Inner Vancouver Metro-East Clark County Lowlands- Including the cities of Oregon City, Lake Oswego, Camas, Woodburn, Castle Rock, Sheridan, Portland, Happy Valley, Kelso, Gresham, Salem, Stayton, La Center, Monmouth, Tigard, Scappoose, Hockinson, Sellwood, Molalla, Fairview, Longview, Newberg, Ridgefield, Washougal, Kalama, Clatskanie, Keizer, Woodland, Brush Prairie, Battle Ground, Vancouver, Salmon Creek, Forest Grove, Hillsboro, St. Helens, Wilsonville, Evergreen, Silverton, Sherwood, Rockcreek, Dallas, Rainier, McMinnville, Eagle Creek, and Troutdale 1039 PM PDT Sat Oct 31 2026 ...DENSE FOG ADVISORY REMAINS IN EFFECT FROM 1 AM TO 10 AM PST SUNDAY... * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...In Oregon, East Central Willamette Valley, East Portland Metro, Inner Portland Metro, Lower Columbia River, Tualatin Valley, and West Central Willamette Valley. In Washington, Cowlitz County Lowlands, East Clark County Lowlands, Inner Vancouver Metro, and North Clark County Lowlands. * WHEN...From 1 AM to 10 AM PST Sunday. * IMPACTS...Low visibility could make driving conditions hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down and leave plenty of distance ahead of you. Pedestrians and cyclists should wear bright or reflective clothing to increase the chances of being seen by others in poor visibility conditions. && $$ Action: Continued Issued At: 2026-11-01 10:42:46 044 WWUS76 KPQR 011642 NPWPQR URGENT - WEATHER MESSAGE National Weather Service Portland OR 842 AM PST Sun Nov 1 2026 ORZ108-111-112-114>117-WAZ204>207-011745- /O.CAN.KPQR.FG.Y.0020.000000T0000Z-261101T1800Z/ Lower Columbia River-Inner Portland Metro-East Portland Metro- West Central Willamette Valley-East Central Willamette Valley- Benton County Lowlands-Linn County Lowlands-Cowlitz County Lowlands-North Clark County Lowlands-Inner Vancouver Metro-East Clark County Lowlands- Including the cities of Lebanon, Philomath, Harrisburg, Stayton, Molalla, Happy Valley, Hockinson, Woodland, La Center, Eagle Creek, Brownsville, Monmouth, Longview, Rainier, Kalama, Salmon Creek, Corvallis, Battle Ground, Kelso, Woodburn, Gresham, Wilsonville, Castle Rock, Troutdale, Lake Oswego, Newberg, Washougal, Dallas, Sellwood, Silverton, Sheridan, Keizer, Ridgefield, Brush Prairie, Clatskanie, Scappoose, St. Helens, Fairview, Monroe, Albany, Camas, McMinnville, Oregon City, Vancouver, Evergreen, Portland, and Salem 842 AM PST Sun Nov 1 2026 ...DENSE FOG ADVISORY IS CANCELLED... Visibility has improved for many locations this morning, so the Dense Fog Advisory is cancelled. $$ ORZ109-118-011800- /O.CON.KPQR.FG.Y.0020.000000T0000Z-261101T1800Z/ Tualatin Valley-Lane County Lowlands- Including the cities of Sherwood, Rockcreek, Creswell, Cottage Grove, Hillsboro, Forest Grove, Eugene, Springfield, Tigard, and Junction City 842 AM PST Sun Nov 1 2026 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS MORNING... * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Tualatin Valley and Lane County Lowlands. * WHEN...Until 10 AM PST this morning. * IMPACTS...Low visibility could make driving conditions hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down and leave plenty of distance ahead of you. Pedestrians and cyclists should wear bright or reflective clothing to increase the chances of being seen by others in poor visibility conditions. && $$ ts Action: Cancelled Issued At: 2026-11-01 10:42:46 044 WWUS76 KPQR 011642 NPWPQR URGENT - WEATHER MESSAGE National Weather Service Portland OR 842 AM PST Sun Nov 1 2026 ORZ108-111-112-114>117-WAZ204>207-011745- /O.CAN.KPQR.FG.Y.0020.000000T0000Z-261101T1800Z/ Lower Columbia River-Inner Portland Metro-East Portland Metro- West Central Willamette Valley-East Central Willamette Valley- Benton County Lowlands-Linn County Lowlands-Cowlitz County Lowlands-North Clark County Lowlands-Inner Vancouver Metro-East Clark County Lowlands- Including the cities of Lebanon, Philomath, Harrisburg, Stayton, Molalla, Happy Valley, Hockinson, Woodland, La Center, Eagle Creek, Brownsville, Monmouth, Longview, Rainier, Kalama, Salmon Creek, Corvallis, Battle Ground, Kelso, Woodburn, Gresham, Wilsonville, Castle Rock, Troutdale, Lake Oswego, Newberg, Washougal, Dallas, Sellwood, Silverton, Sheridan, Keizer, Ridgefield, Brush Prairie, Clatskanie, Scappoose, St. Helens, Fairview, Monroe, Albany, Camas, McMinnville, Oregon City, Vancouver, Evergreen, Portland, and Salem 842 AM PST Sun Nov 1 2026 ...DENSE FOG ADVISORY IS CANCELLED... Visibility has improved for many locations this morning, so the Dense Fog Advisory is cancelled. $$ ORZ109-118-011800- /O.CON.KPQR.FG.Y.0020.000000T0000Z-261101T1800Z/ Tualatin Valley-Lane County Lowlands- Including the cities of Sherwood, Rockcreek, Creswell, Cottage Grove, Hillsboro, Forest Grove, Eugene, Springfield, Tigard, and Junction City 842 AM PST Sun Nov 1 2026 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS MORNING... * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Tualatin Valley and Lane County Lowlands. * WHEN...Until 10 AM PST this morning. * IMPACTS...Low visibility could make driving conditions hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down and leave plenty of distance ahead of you. Pedestrians and cyclists should wear bright or reflective clothing to increase the chances of being seen by others in poor visibility conditions. && $$ ts Action: Expired Issued At: 2026-11-01 12:06:18 388 WWUS76 KPQR 011806 NPWPQR URGENT - WEATHER MESSAGE National Weather Service Portland OR 1006 AM PST Sun Nov 1 2026 ORZ109-118-011915- /O.EXP.KPQR.FG.Y.0020.000000T0000Z-261101T1800Z/ Tualatin Valley-Lane County Lowlands- Including the cities of Sherwood, Rockcreek, Creswell, Cottage Grove, Hillsboro, Forest Grove, Eugene, Springfield, Tigard, and Junction City 1006 AM PST Sun Nov 1 2026 ...DENSE FOG ADVISORY HAS EXPIRED... Any lingering Dense fog has become very localized with many locations improving. Thus, the Dense Fog Advisory will be allowed to expire. $$ ts | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||