The Tualatin River has once again climbed above the 28-foot mark that represents its "action stage" at the Farmington gauge, just upstream from the city of Tualatin.
National Weather Service data shows the river had risen to 28.77 feet at the Farmington gauge as of 9:30 a.m. Thursday. Its forecast shows it cresting well short of flood level, at 29.13 feet, around midday Friday.
The minor flood stage for the Tualatin River at Farmington is considered to be 32 feet, according to the NWS. At that level, flooding of some roads in and around Tualatin can be expected.
The river flooded in Farmington last month. No property damage was reported, although a section of Nyberg Lane in east Tualatin, the city's lowest-lying road along the river channel, was closed for two days.
Local rivers and streams are experiencing high water after being swollen by rains earlier this week.
Drivers who encounter high water on any roadway are encouraged not to attempt to drive through it, with the NWS and other agencies using the slogan "Turn Around Don't Drown."