45°13'N / 122°34'O / Altitudine 73 m / 08:23 31/10/2026, America/Los_Angeles (UTC-7)
Da: 31/10/2026, 07:19
A: 31/10/2026, 12:00
* WHAT...For the Dense Fog Advisory, visibility one quarter mile or less in dense fog. For the Frost Advisory, temperatures of 36 degrees or lower will result in frost formation. * 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, East Clark County Lowlands, Inner Vancouver Metro, and North Clark County Lowlands. * WHEN...For the Dense Fog Advisory, until noon PDT today. For the Frost Advisory, until 9 AM PDT this morning. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Frost and freeze headlines are only issued through the growing season of April 1 through October 31. Therefore, frost or freeze headlines will not be issued beginning November 1, even though similar low temperatures are possible. Frost and freeze headlines will no longer be issued this growing season for the Upper Hood River Valley, southern Willamette Valley, south Washington Cascade Foothills, and north Oregon Coast Range as these locations have already experienced a hard freeze earlier in October.
Clackamas,East Central Willamette Valley
If driving, slow down, use your headlights, 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.
Consider temporarily covering sensitive plants with a lightweight
cotton fabric (i.e., bedsheets, thin blankets), as this will help
retain heat and provide frost protection for your plants.
NWS Portland OR
31/10/2026, 07:19
Da: 31/10/2026, 07:19
A: 31/10/2026, 12:00
* WHAT...For the Dense Fog Advisory, visibility one quarter mile or less in dense fog. For the Frost Advisory, temperatures of 36 degrees or lower will result in frost formation. * 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, East Clark County Lowlands, Inner Vancouver Metro, and North Clark County Lowlands. * WHEN...For the Dense Fog Advisory, until noon PDT today. For the Frost Advisory, until 9 AM PDT this morning. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Frost and freeze headlines are only issued through the growing season of April 1 through October 31. Therefore, frost or freeze headlines will not be issued beginning November 1, even though similar low temperatures are possible. Frost and freeze headlines will no longer be issued this growing season for the Upper Hood River Valley, southern Willamette Valley, south Washington Cascade Foothills, and north Oregon Coast Range as these locations have already experienced a hard freeze earlier in October.
Clackamas,East Central Willamette ValleyIf driving, slow down, use your headlights, 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.
Consider temporarily covering sensitive plants with a lightweight
cotton fabric (i.e., bedsheets, thin blankets), as this will help
retain heat and provide frost protection for your plants.NWS Portland OR31/10/2026, 07:19Da: 31/10/2026, 07:19
A: 31/10/2026, 09:00
* WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Portions of northwest and west central Oregon and southwest Washington. * WHEN...Until 9 AM PDT this morning. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. * ADDITIONAL DETAILS...Frost and freeze headlines are only issued through the growing season of April 1 through October 31. Therefore, frost or freeze headlines will not be issued beginning November 1, even though similar low temperatures are possible. Frost and freeze headlines will no longer be issued this growing season for the Upper Hood River Valley, southern Willamette Valley, south Washington Cascade Foothills, and north Oregon Coast Range as these locations have already experienced a hard freeze earlier in October.
ClackamasConsider temporarily covering sensitive plants with a lightweight
cotton fabric (i.e., bedsheets, thin blankets), as this will help
retain heat and provide frost protection for your plants.NWS Portland OR31/10/2026, 07:19