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
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
* 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.
A Flood Watch means there is a potential for flooding based on
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.