Flood in Multnomah County, Oregon

Flood January 19, 2012 – January 20, 2012 · Multnomah 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 Johnson Creek at Sycamore to overflow its banks and flood low lying areas. The Johnson Creek crested at 13.2 feet on January 19th at 4 pm PST, 2.2 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 Bellrose (45.4749, -122.5133).

Source: NOAA Storm Events Database, event 356990. Narratives are written by the National Weather Service forecast office that issued the report.

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