East Wilson Weather

* WHAT...River and urban flooding caused by excessive rainfall is
possible. Landslides possible in areas of steep terrain, and
debris flows possible over recently burned areas.

* WHERE...Portions of Oregon, including the following areas, Benton
County Lowlands, Cascade Foothills of Marion and Linn Counties,
Cascades of Lane County, Cascades of Marion and Linn Counties,
Central Coast of Oregon, Central Columbia River Gorge I-84
Corridor, Central Oregon Coast Range, Central Oregon Coast Range
Lowlands, Clackamas County Cascade Foothills, Clatsop County
Coast, East Central Willamette Valley, East Portland Metro, Inner
Portland Metro, Lane County Cascade Foothills, Lane County
Lowlands, Linn County Lowlands, Lower Columbia River, North Oregon
Cascades, North Oregon Coast Range, North Oregon Coast Range
Lowlands, Outer Southeast Portland Metro, Portland West Hills and
Chehalem Mountain, Tillamook County Coast, Tualatin Valley, Upper
Hood River Valley, West Central Willamette Valley, West Columbia
River Gorge I-84 Corridor and West Columbia River Gorge of Oregon
above 500 ft and southwest Washington, including the following
areas, Central Columbia River Gorge SR 14 Corridor, Cowlitz County
Lowlands, East Clark County Lowlands, Inner Vancouver Metro, North
Clark County Lowlands, South Washington Cascade Foothills, South
Washington Cascades, South Washington Coast, West Columbia River
Gorge SR 14 Corridor, Willapa Hills and Willapa and Wahkiakum
Lowlands.

* WHEN...From late Sunday night through late Thursday night.

* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
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.

* ADDITIONAL DETAILS...
- A prolonged atmospheric river is expected to bring periods of
heavy rain to northwest Oregon and southwest Washington
Monday through Wednesday, with periods of lighter rain
continuing Thursday into Friday. Rivers draining the coastal
mountains and several Willamette Tributaries have the highest
chance of flooding at 40 to 70%. Chances for flooding along
the Willamette mainstem remains low at under 5%.
- http://www.weather.gov/safety/flood

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.

ESFPQR

A series of frontal systems will keep conditions wet through the
weekend and much of next week. The most notable period will be late
Monday through late Wednesday, where a prolonged atmospheric river
may bring significant rainfall and rising rivers across southwest
Washington and northwest Oregon. However, river flooding for some
locations could continue into Thursday and beyond as some rivers
take longer to respond to heavier rainfall. Rivers draining the
Coast Range and Willapa Hills have a 30-60% chance of reaching
moderate flood stage and a 10-30% chance of reaching major flood
stage. Additionally, many Willamette River tributaries that drain
from the Coast Range and Cascades have anywhere from a 10-55% chance
of reaching minor flood stage and a 10-25% chance of reaching
moderate flood stage. Flooding of the Willamette mainstem rivers is
unlikely to occur (less than 10%). Probabilities for specific river
points can be found at the National Water Prediction Service
website.

There is also the potential for flooding along small creeks and
streams, as well as urban flooding, including roadway flooding, for
locations in the central Willamette Valley north into the southwest
Washington lowlands, including the Portland metro area. Periods of
heavy rain will also increase the risk for landslides in areas of
steep terrain, and debris flows over recently burned areas.