Flood in Columbia County, Washington

Flood March 14, 2026 – March 15, 2026 · Columbia County, Washington

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

What the National Weather Service wrote

The Columbia County Emergency Managers office reported flooding of residences and water over roadways in the town of Dayton the morning of the 14th. Drone footage over Dayton taken on the 14th showed the Touchet river overflowing it's banks into numerous properties adjacent to the river, with flooding also along the Patit Creek that runs through the northern portion of Dayton.

The wider storm

Heavy snow in the northern Blue mountains transitioned to rain the night of the 13th through the 14th, leading to rises in area rivers and streams. Portions of the Touchet river and Mill Creek eventually exceeded their banks, leading to flooding of residential areas and roadways across Columbia and Walla Walla Counties.

Began near Dayton (46.3259, -117.9763).

Source: NOAA Storm Events Database, event 1327916. Narratives are written by the National Weather Service forecast office that issued the report.

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