The National Weather Service’s online map of northwest Oregon and southwest Washington remains full of colors, each representing warnings, watches and advisories.
NWS Portland
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.
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 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. 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 until Saturday morning. As of 4 a.m. Thursday, river levels were at 13.3 feet with a flow of 17,568 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 feet by 10 p.m. with potential flooding of low lying farm land and downstream structures near the town of Nahalem.
* 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 Northwest Avalanche Center has also issued a watch and warning for the Mount Hood area through Thursday after recent snow. Rain will add further loads and weaken the snow, which could cause loose wet avalanches at lower elevations.
A winter storm warning remains in effect in areas near the Hood River Valley until 4 p.m. Thursday. Freezing rain should be felt below 2,500 feet. Road travel will be difficult, according to the weather service.
This post will be updated as news develops.
— Tony Hernandez
thernandez@oregonian.com
503-294-5928
@tonyhreports
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