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Purple 2-12-19

Forecasters say heavy rain at lower elevations may cause minor flooding along a few rivers in the mid-valley on Tuesday, and the Marys River in Benton County is among the rivers of concern.

A flood watch for the mid-valley issued by the National Weather Service office in Portland remains in effect until 4 a.m. Wednesday.

Heavy precipitation through Tuesday will likely fall as rain at lower elevations, although uncertainty remains about the snow level Tuesday morning. Rainfall totals of 1 to 4 inches are possible for the coast and inland valleys. The combination of low-elevation heavy rain and snowmelt may result in localized small stream and urban flooding, along with flooding of a few rivers and creeks in the Willamette Valley Tuesday and Tuesday night, forecasters said.

Rivers of greatest concern include the Marys in Benton County, the Luckiamute in Polk and Benton counties, and Johnson Creek in Multnomah and Clackamas County. These rivers will likely reach bankfull, but it remains unclear if they will reach minor flood stage.

Forecasters urged people to monitor forecasts and to be alert for possible flood warnings. People who live in areas prone to flooding should be prepared to take action should flooding develop, forecasters said.

Landslides and debris flows are possible, forecasters said. People, structures and roads located below steep slopes, in canyons and near the mouths of canyons may be at serious risk from rapidly moving landslides.

Here are your updated local forecasts:

Albany

Tuesday: Rain before 10 a.m., then rain and snow until 1 p.m., then rain. The rain could be heavy at times. High near 40. Windy, with a south wind 17 to 22 mph decreasing to 10 to 15 mph in the afternoon. Winds could gust as high as 36 mph. Chance of precipitation is 100 percent. Little or no snow accumulation expected.

Tuesday night: Showers before 4 a.m., then rain likely. Low around 34. South wind 5 to 8 mph. Chance of precipitation is 100 percent. New precipitation amounts between a quarter and half of an inch possible.

Wednesday: Rain likely before 10 a.m., then a chance of showers until 4 p.m. Cloudy, with a high near 41. North wind 5 to 8 mph. Chance of precipitation is 70 percent. New precipitation amounts between a tenth and quarter of an inch possible.

Corvallis

Tuesday: Rain before 10 a.m., then rain and snow until 1 p.m., then rain. The rain could be heavy at times. High near 40. Breezy, with a south wind 16 to 21 mph decreasing to 8 to 13 mph in the afternoon. Winds could gust as high as 34 mph. Chance of precipitation is 100 percent. Little or no snow accumulation expected.

Tuesday night: Showers before 4 a.m., then rain likely. Low around 35. South wind 3 to 7 mph. Chance of precipitation is 100 percent. New precipitation amounts between a quarter and half of an inch possible.

Wednesday: Rain likely before 10 a.m., then a chance of showers. Cloudy, with a high near 41. North northeast wind 5 to 8 mph. Chance of precipitation is 70 percent. New precipitation amounts between a tenth and quarter of an inch possible.

Lebanon

Tuesday: Rain before 10 a.m., then rain and snow until 1 p.m., then rain. The rain could be heavy at times. High near 40. Breezy, with a south wind 16 to 21 mph decreasing to 8 to 13 mph in the afternoon. Winds could gust as high as 34 mph. Chance of precipitation is 100 percent. Little or no snow accumulation expected.

Tuesday night: Showers before 4 a.m., then rain. Low around 34. Southeast wind around 6 mph. Chance of precipitation is 100 percent. New precipitation amounts between a quarter and half of an inch possible.

Wednesday: Rain before 10 a.m., then a chance of showers. High near 41. North wind 3 to 6 mph. Chance of precipitation is 80 percent. New precipitation amounts between a tenth and quarter of an inch possible.

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