Update, 5:37 p.m.: The National Weather Service canceled a flood watch for parts of Northwest Oregon and southwest Washington late Thursday afternoon.

"Rain has eased and no new flooding is expected," the weather service said.

Still, high water persists for some Willamette tributary, coastal mountain and southwest Washington rivers.

The agency also issued a flood warning for the Cowlitz River at Kelso.

***

The National Weather Service's online map of northwest Oregon and southwest Washington remains full of colors, each representing warnings, watches and advisories.

Throughout the state, the weather service shows dozens of extreme weather notices, according to an online list as of 7:30 a.m. Thursday.

Rough weather has brought a flood watch for the Portland area and most other areas east of the Cascades on Thursday, but the region also faces a slew of other notices including avalanche and winter storm warnings in the northern Cascades, high wind warnings and coastal flood advisories.

The weather service said at 12:40 p.m. a narrow band of moderate to heavy showers has extended from Newberg to northeast Clark County. Moving at 35 mph, the band could also produce small hail in Clark County and the north and central areas of Willamette Valley through at least 2 p.m.

The Oregon Department of Transportation has closed U.S. 101 just south of Seaside because of standing high water that's almost 2 feet deep. The flooding has been caused by steady, heavy rain and rising tides. Crews later reopened the highway for truck and "higher profile vehicles."

High water also closed Oregon 126 at Cushman, just east of Florence and U.S. 101, according to a state transportation department. Both lanes of Oregon 126 have reopened in the area, as of 2:15 p.m., but there is water on the road.

Reports of multiple landslides continue. Heavy rains have triggered the slides this week, and the Oregon Department of Geology and Mineral Industries

maintains an interactive map

that helps identify areas susceptible to landslides. People, structures and roads below steep slopes in canyons and near the mouths of canyons may be at serious risk, the department warned on Wednesday.

Recently road crews have closed Northwest Thompson Road between Cornell and Skyline roads after a landslide early Thursday morning, and the road will remain closed until engineers can get a good look at the damage at first light. The road should reopen by 1 p.m.

Traffic flaggers have been helping motorists after a slide on Northwest Cornelius Pass Road near Columbia Street.

"A slide at 14151 NW Germantown Road west of NW Skyline Blvd. has not been cleared but traffic is able to get by in both directions," Mike Pullen, Multnomah County spokesman, said in a news release.

He later said, "Drivers should expect long delays on NW Cornelius Pass Road until about 6 pm tonight."

Multnomah and Washington counties each report multiple road closures because of the weather. Check out The Oregonian/OregonLive's traffic report for Thursday's latest.

The National Weather Service has issued an urban and small stream flood advisory until 12:45 p.m. Thursday for the following areas:

* Polk, Yamhill, Lincoln, Tillamook, Columbia, Clatsop, Benton and Washington counties.

* Western areas of Multnomah and Linn counties and northwest areas of Clackamas, Lane County and Marion counties.

* Wahkiakum, Central Pacific counties in Washington and portions of Clark and Cowlitz counties.

The National Weather Service has issued flood warnings for:

* The Nehalem River near Foss. As of 10 a.m. Thursday, river levels were at 17.9 feet with a flow of 19,900 cubic feet per second. The river enters a flood stage at 15 feet with a flow of 22,000 cfs. Forecasters predict the river should crest around 19.5 feet by 10 p.m. with potential widespread flooding of low lying farm land and downstream streets and structures near the town of Nahalem.

* The Nehalem River near Vernonian. As of 11 a.m. Thursday, river levels were at 12.1 feet with a flow of 5,200 cubic feet per second. The river enters a flood stage at 12 feet with a flow of 5,200 cfs. Forecasters predict the river should crest around 13 feet by 1 p.m. before falling below flood levels by 4 p.m.

* The Wilson River until Thursday evening. As of 3 a.m., river levels were at 8.6 feet with 7,215 cubic feet per second. The river enters a flood stage at 12 feet with a flow of 14,000 cfs. Forecasters predict the river should crest around 12.7 feet by 10 a.m. with potential minor flooding of low lying dairy and pasture east of Tillamook.

* The South Yamhill River at McMinnville from Friday morning to Friday evening. As of 9 a.m. Thursday, river levels were at 38.9 feet with a flow of 9,900 cubic feet per second. The river enters a flood stage at 50 feet with a flow of 19,000 cfs. Forecasters say the river should crest at 50.5 feet by around noon Friday with lowland flooding at several locations from McMinnville to the river's confluence with the Willamette River.

* The Luckiaumute River near Suver until Saturday morning. As of 3 a.m. Thursday, the river levels were at 24.5 feet with a flow of 5,600 cubic feet per second. The river enters a flood stage at 27 feet with a flow of 7,000 cfs. Forecasters say the river should pass flood levels by noon Thursday and crest at 29 feet by Friday morning. Widespread lowland flooding of agricultural lands from Falls City and Maple Grove to river's confluence with the Willamette River.

* The Siuslaw River near Mapleton in Lane County until Thursday evening. As of noon, river levels were at 17.4 feet with a flow of 20,900 cubic feet per second. The river enters a flood stage at 18 feet with a flow of 22,600 cfs. Forecasters say the river should crest at 18.4 feet by 4 p.m. Thursday. Minor lowland flooding of dairy lands could occure along the banks of the river near Mapleton.

The National Weather Service says it's continuing its flood warnings for the Pudding River at Aurora that could affect areas in Clackamas and Marion counties and the Marys River near Philomath.

* As of 9 a.m., the Pudding River levels were at 22.3 feet with a flow of 7,400 cubic feet per second. The river enters a flood stage at 22 feet with a flow of 7,000 cfs. Forecasters predict the river should crest at 23.5 feet by Saturday morning. Minor flooding could occur of low lying agricultural areas and roads.

* As of 8 a.m. Thursday, the Marys River levels were at 20.5 feet with a flow of 5,700 cubic feet per second. The river enters a flood stage at 20 feet with a flow of 5,000 cfs. Forecasters say the river should remain at 20.5 feet through Thursday afternoon before beginning to slightly drop. Flooding could occur in southern areas of Corvallis, including a trailer park and light industrial areas.

Among the multiple ongoing weather issues in NW Oregon and SW Washington, we're dealing with flooding along some rivers... Posted by US National Weather Service Portland Oregon on Thursday, February 9, 2017

The weather service also maintains an interactive map that monitors current river observations and flooding forecasts for the state and nationwide areas.

Heavy rains and high water have been a part of life in the Rose City and surrounding towns since people began gathering here. Last Sunday marked the 21st anniversary of 1996's epic flood.

The Portland Bureau of Environmental Services report a combined sewage overflow occurred at the Southwest Carolina Street outfall at the Willamette River. The city agency suspects the debris blocked the sewage system causing the overflow around 11:45 p.m. Wednesday before the blockage cleared itself.

"Because of increased bacteria in the water, the public should avoid contact with the Willamette River in the area north of Willamette Park for 48 hours after the (combined sewage overflow) event ended," according to a press release. The overflow includes about 80 percent stormwater runoff and 20 percent sewage.

Meanwhile, the Northwest Avalanche Center has also issued warnings for much of the northern Cascades, including Mount Hood and other areas, through Thursday after recent snow. Rain will add further loads and weaken the snow, which could cause loose wet avalanches at lower elevations, according to the weather service.

A winter storm warning in areas near the Hood River Valley was cancelled at 1:39 p.m. after temperatures rose above freezing over much of the valley and central areas of the Columbia River Gorge.

"There may be pockets of light freezing rain through the afternoon, but impacts will be minimal," according to the weather service announcement.

The Washington State Department of Transportation tweeted that all eastbound and westbound lanes over the Cascades are closed in that state because of snow slides and avalanche danger. For more information visit the agency's website.

All EB/WB hwys over the Cascades are currently closed due to snow slides and high avalanche danger. — Washington State DOT (@wsdot) February 9, 2017

Here's a look at a couple of the slides blocking US 2 Stevens Pass. There are 3 more across this area. pic.twitter.com/aO7NnyCBE6 — Washington State DOT (@wsdot) February 9, 2017

This post will be updated as news develops.

-- Tony Hernandez

thernandez@oregonian.com

503-294-5928

@tonyhreports