High water is prompting some road closures in Washington County Thursday.

COURTESY OF THE NATIONAL WEATHER SERVICE - A hydrograph shows the Tualatin River rising back above its minor flood stage in Farmington on Friday.Just days after the Tualatin River reached its minor flood stage in Farmington, the river is set to rise above flood level there once again.

The Tualatin River is expected to climb above the 32-foot mark at the Farmington river gauge, which is the point at which the National Weather Service considers the river's minor flood stage in Farmington, on Friday. A hydrological forecast as of Thursday morning projects it will crest early Saturday at 32.62 feet.

Minor flooding in Tualatin means high water on some roads in the Farmington and Tualatin areas can be expected, according to the NWS.

The river flooded in Farmington late Friday and crested above 33 feet the following day. Subsequently, Nyberg Lane in Tualatin was closed at Browns Ferry Park on Monday and Tuesday due to flooding.

At the minor flood stage in Farmington, buildings are generally not threatened. At the river's moderate flood stage, which begins at 34 feet, that becomes more of a risk.

The upturn in the river level comes as heavy rain pummels the region, from late Wednesday overnight into Thursday. The downpour caused some localized flooding across the Portland and Salem areas.

High water was reported Thursday morning on Scholls Ferry Road at Clark Hill Road, west of Beaverton and Tigard. The Washington County Sheriff's Office urged motorists to avoid the area.

A full list of Washington County road closures is available on the county's website.

COURTESY OF THE WASHINGTON COUNTY SHERIFF'S OFFICE - High water creates a hazard for motorists on Scholls Ferry Road at Clark Hill Road on Thursday morning, as heavy rain lashes the region.

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