Flood Watch


HEAVY RAIN AT LOWER ELEVATIONS MAY CAUSE URBAN AND SMALL STREAM

FLOODING TONIGHT AND TUESDAY...

...MINOR FLOODING POSSIBLE ALONG A FEW RIVERS IN NORTHWEST

OREGON TUESDAY AND TUESDAY NIGHT...


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.


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.


PRECAUTIONARY/PREPAREDNESS ACTIONS...


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.

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