Full Notification

Heavy precipitation Monday night 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 along a few rivers and creeks in the Willamette Valley Tuesday and Tuesday night. The National Weather Service in Portland has issued a

* Flood Watch for portions of Northwest Oregon and Southwest Washington, including the following areas, in Northwest Oregon, Central Coast Range of Western Oregon, Central Oregon Coast, Central Willamette Valley, Coast Range of Northwest Oregon, Greater Portland Metro Area, Lower Columbia, North Oregon Coast, and South Willamette Valley. In Southwest Washington, Greater Vancouver Area and I-5 Corridor in Cowlitz County.

* From 7 PM PST this evening through late Tuesday night.

* Heavy rain at low elevations Monday night and Tuesday may cause ponding in roadway low areas and flooding along small streams. Rainfall totals for low elevations are forecast to be 1 to 4 inches. Minor flooding along a few rivers and creeks in the Willamette Valley and Portland metro area is possible Tuesday and Tuesday night.

* 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. As of Monday morning, only minor flooding is predicted.

* AFFECTED AREAS: CENTRAL COAST RANGE OF WESTERN OREGON ... GREATER PORTLAND METRO AREA ... LOWER COLUMBIA AND I - 5 CORRIDOR IN COWLITZ COUNTY ... NORTH OREGON COAST ... CENTRAL WILLAMETTE VALLEY ... LOWER COLUMBIA ... COAST RANGE OF NORTHWEST OREGON ... SOUTH WILLAMETTE VALLEY ... GREATER VANCOUVER AREA ... CENTRAL OREGON COAST

Instructions:

A Flood Watch means there is a potential for flooding based on current forecasts. You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop. Landslides and debris flows are possible during this flood event. 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.