Avalanche Warning issued March 12 at 6:53PM PDT by NWS Portland OR
发布日期：2026-03-13T01:53+00:00
AVWPQR The following message is transmitted at the request of the Northwest Avalanche Center. ...The Northwest Avalanche Center in Seattle has issued an Avalanche Warning... * WHAT...A very dangerous natural avalanche cycle continues as heavy precipitation, rising snow levels, and extreme winds impact the region. Very large natural avalanches are likely and may run long distances into low-elevation canyon runouts. * WHERE...Areas near Mt Hood. * WHEN...In effect from Thu 18:30 PDT to Fri 18:30 PDT. * IMPACTS...Very large natural avalanches are expected. These will be more than enough to bury, injure, and kill backcountry travelers. * PRECAUTIONARY / PREPAREDNESS ACTIONS...Avoid all areas where avalanches can start, run, or stop. This includes steep alpine slopes, sparsely forested slopes, and winding canyong runouts with small trees. Consult https://www.nwac.us/ or www.avalanche.org for more detailed information. Similar avalanche danger may exist at locations outside the coverage area of this or any avalanche center.
Flood Warning issued March 12 at 4:44PM PDT until March 14 at 1:12PM PDT by NWS Portland OR
发布日期：2026-03-12T23:44+00:00
...The Flood Warning is extended for the following rivers in Oregon... Johnson Creek at Sycamore affecting Clackamas and Multnomah Counties. * WHAT...Minor flooding is forecast. * WHERE...Johnson Creek at Sycamore. * WHEN...Until early Saturday afternoon. * IMPACTS...Above 13.0 feet, expect flooding to begin at numerous locations along Johnson Creek. Evacuations of several homes have historically taken place at this and higher stages. * ADDITIONAL DETAILS... - At 4:30 PM PDT Thursday the stage was 10.8 feet. - Bankfull stage is 10.0 feet. - Forecast...The river will briefly rise above flood stage to 11.2 feet late this afternoon. It will then fall below flood stage this evening to 8.9 feet late tonight. Additional rainfall on Friday will cause it to again rise above flood stage again tomorrow afternoon to 13.0 feet by late tomorrow evening. It will then fall below flood stage again Saturday morning as rainfall ends. - Flood stage is 11.0 feet. - http://www.weather.gov/safety/flood
Flood Watch issued March 12 at 4:12PM PDT until March 16 at 11:00PM PDT by NWS Portland OR
发布日期：2026-03-12T23:12+00:00
...The Flood Watch continues for the following rivers in Oregon... Pudding River at Aurora affecting East Central Willamette Valley zone. * WHAT...Flooding is possible. * WHERE...Pudding River at Aurora. * WHEN...From Saturday afternoon to late Monday evening. * IMPACTS...Above 22.0 feet, expect minor flooding of low-lying agricultural lands and access roads along the river. * ADDITIONAL DETAILS... - At 4:00 PM PDT Thursday the stage was 12.4 feet. - Forecast...Flood stage may be reached based on the latest forecast information. - Flood stage is 22.0 feet. - http://www.weather.gov/safety/flood
Flood Watch issued March 12 at 3:56PM PDT until March 14 at 5:00PM PDT by NWS Portland OR
发布日期：2026-03-12T22:56+00:00
* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of northwest Oregon, including the following areas, Clackamas County Cascade Foothills, Clatsop County Coast, East Central Willamette Valley, East Portland Metro, Inner Portland Metro, Lower Columbia River, North Oregon Coast Range, North Oregon Coast Range Lowlands, Outer Southeast Portland Metro, Portland West Hills and Chehalem Mountain, Tillamook County Coast, Tualatin Valley, West Central Willamette Valley, West Columbia River Gorge I-84 Corridor and West Columbia River Gorge of Oregon above 500 ft and southwest Washington, including the following areas, Cowlitz County Lowlands, East Clark County Lowlands, Inner Vancouver Metro, North Clark County Lowlands, South Washington Cascade Foothills, West Columbia River Gorge SR 14 Corridor, Willapa Hills and Willapa and Wahkiakum Lowlands. * WHEN...Through Saturday afternoon. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. Area creeks and streams are running high and could flood with more heavy rain. Landslides and debris flows are possible during this flood event. People, structures, and roads located below steep slopes, in canyons, and near the mouths of canyons may be at serious risk from rapidly moving landslides. * ADDITIONAL DETAILS... - http://www.weather.gov/safety/flood
Winter Weather Advisory issued March 12 at 1:49PM PDT until March 12 at 11:00PM PDT by NWS Portland OR
发布日期：2026-03-12T20:49+00:00
* WHAT...Wet snow above 3500 to 4500 ft. Additional snow accumulations up to 1 to 4 inches at pass level. For isolated locations between 5000 and 5500 feet near Mount Hood, additional accumulations of 3 to 8 inches. Winds gusting as high as 35 mph. * WHERE...North Oregon Cascades. * WHEN...Until 11 PM PDT this evening. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous.
