Flood Advisory issued March 12 at 9:27AM PDT until March 12 at 12:30PM PDT by NWS Portland OR
Issue date: 2026-03-12T16:27+00:00
* WHAT...Urban and small stream flooding caused by excessive rainfall is expected. * WHERE...A portion of northwest Oregon, including the following county, Clackamas. * WHEN...Until 1230 PM PDT. * IMPACTS...Minor flooding in low-lying and poor drainage areas. * ADDITIONAL DETAILS... - At 927 AM PDT, Doppler radar and automated rain gauges indicated heavy rain. This will cause urban and small stream flooding. Between 1.5 and 2.5 inches of rain have fallen. - Additional rainfall amounts up to 1 inch are expected over the area. This additional rain will result in minor flooding. - Some locations that will experience flooding include... Oregon City, Lake Oswego, West Linn, Canby, Gladstone, Jennings Lodge and Barlow. - http://www.weather.gov/safety/flood
Flood Warning issued March 12 at 9:01AM PDT until March 14 at 5:00AM PDT by NWS Portland OR
Issue date: 2026-03-12T16:01+00:00
...The National Weather Service in Portland OR has issued a Flood Warning 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 morning. * IMPACTS...Above 11.0 feet, minor flooding begins along Johnson Creek between SE 92nd Street to SE 122nd Street and between Johnson Creek and SE Harold Street. * ADDITIONAL DETAILS... - At 8:30 AM PDT Thursday the stage was 9.4 feet. - Bankfull stage is 10.0 feet. - Forecast...The river will rise to a maximum value of 11.3 feet late this afternoon. - Flood stage is 11.0 feet. - http://www.weather.gov/safety/flood
Flood Watch issued March 12 at 8:56AM PDT until March 16 at 11:00PM PDT by NWS Portland OR
Issue date: 2026-03-12T15:56+00:00
...Forecast flooding changed to Minor severity 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 8:00 AM PDT Thursday the stage was 10.6 feet. - Forecast...Flood stage may be reached Monday morning. - Flood stage is 22.0 feet. - http://www.weather.gov/safety/flood
Flood Watch issued March 12 at 8:28AM PDT until March 13 at 11:00PM PDT by NWS Portland OR
Issue date: 2026-03-12T15:28+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 Friday evening. * 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 2:01AM PDT until March 12 at 11:00PM PDT by NWS Portland OR
Issue date: 2026-03-12T09:01+00:00
* WHAT...Wet snow accumulations will be heavily elevation dependent. For locations between 3000 and 5000 feet, wet snow accumulations of 3 to 10 inches possible. For isolated locations between 5000 and 5500 feet near Mount Hood, accumulations of 10 to 14 inches. Gusts as high as 55 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. * ADDITIONAL DETAILS...For locations above 5500 feet, expect several feet of wet snow.
