Flood Advisory National Weather Service Portland OR 427 AM PST Tue Feb 12 2019 Clatsop OR-Clackamas OR-Polk OR-Yamhill OR-Lincoln OR-Tillamook OR- Columbia OR-Multnomah OR-Marion OR-Washington OR-Clark WA-Cowlitz WA- 427 AM PST Tue Feb 12 2019 The National Weather Service in Portland has issued a * Urban and Small Stream Flood Advisory for... Southeastern Clatsop County in northwestern Oregon... Northwestern Clackamas County in northwestern Oregon... Northwestern Polk County in northwestern Oregon... Yamhill County in northwestern Oregon... Northwestern Lincoln County in western Oregon... Tillamook County in northwestern Oregon... Columbia County in northwestern Oregon... Multnomah County in northwestern Oregon... Northwestern Marion County in northwestern Oregon... Washington County in northwestern Oregon... Clark County in southwestern Washington... Central Cowlitz County in southwestern Washington... * Until 815 AM PST.. * At 420 AM PST, gauge reports indicate hourly rainfall rates of 0.10-0.30" of rain per hour falling across portions of northwest Oregon and southwest Washington. This will result in areas of urban and small stream flooding in the advisory area. Between 0.50- 1.50" of rain has either already fallen in the past several hours or will fall over the next several hours in the advisory area. * Some locations that where flooding could occur include... Tillamook, McMinnville, Forest Grove, Hillsboro, Battle Ground, St. Helens, Scappoose, Kelso, Longview, Woodland, and the Portland and Vancouver metro. PRECAUTIONARY/PREPAREDNESS ACTIONS... Excessive runoff from heavy rainfall will cause flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other drainage areas and low lying spots. Excessive runoff from heavy rainfall will cause flooding of small creeks and streams, country roads, farmland, and other low lying spots.
Flood Watch National Weather Service Portland OR 1133 PM PST Mon Feb 11 2019
…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 tonight 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.
North Oregon Coast-Central Oregon Coast-
Coast Range of Northwest Oregon-
Central Coast Range of Western Oregon-Lower Columbia-
Greater Portland Metro Area-Central Willamette Valley-
South Willamette Valley-I-5 Corridor in Cowlitz County-
Greater Vancouver Area-
1133 PM PST Mon Feb 11 2019
…FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TUESDAY NIGHT…
The Flood Watch continues 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.
* Through late Tuesday night
* Heavy rain at low elevations tonight and Tuesday may cause
ponding on roadways and low lying 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. These rivers will likely reach
bankfull, but it remains unclear if they will reach minor flood
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.
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