Flood in Clackamas County, Oregon

Flood January 21, 2012 – January 22, 2012 · Clackamas County, Oregon

Where the report was made, with tornadoes recorded within 15 miles over the years.

What the National Weather Service wrote

Heavy rain combined with snowmelt runoff caused the Willamette River below the Falls at Oregon City to overflow its banks and flood low lying areas. The Willamette River crested at 29.1 feet on January 21st at 5 pm PST, 2.1 feet above flood stage.

The wider storm

With a cold air mass in place over the Pacific Northwest, two strong and very moist Pacific weather systems brought snow to the area with snow levels down to the valley floor. This snow transitioned to rain from south to north across the area, with widespread heavy rains combining with melting snow to bring many rivers above flood stage and a few rivers above major flood stage.

Began near Oregon City (45.3543, -122.6051).

Source: NOAA Storm Events Database, event 356987. Narratives are written by the National Weather Service forecast office that issued the report.

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