Weather Alerts for Portland

Issued by the National Weather Service

Flash Flood Warning  FLASH FLOOD WARNING   Flash Flood Warning
PORTLAND

Areas Affected:
Hood River - Multnomah
Effective: Sat, 10/21 11:31pm Updated: Sat, 10/21 11:36pm Urgency: Immediate
Expires: Sun, 10/22 11:30am Severity:  Severe  Certainty: Likely

 
Details:
...THE FLASH FLOOD WARNING FOR AREAS IN AND AROUND THE EAGLE CREEK
BURN AREA REMAINS IN EFFECT UNTIL 1130 AM PDT SUNDAY FOR NORTHWESTERN
HOOD RIVER AND EAST CENTRAL MULTNOMAH COUNTIES...
Automated rain gauges indicated that rain rates decreased between 8
PM and 11 PM PDT, but Doppler radar indicates that heavy rain will
return to the burn area within the hour. Flash flooding is expected
overnight.
Some locations that will experience flooding include...
Cascade Locks, Multnomah Falls, Dodson, Warrendale, Bridal Veil,
Bonneville, Wyeth and Rooster Rock State Park.
This warning affects communities between Bridal Veil and Viento State
Park as well as Interstate 84 and the Old Historic Columbia River
Highway.
Some drainage basins impacted include but are not limited to
Multnomah Creek, Oneonta Creek, Horsetail Creek, Tumalt Creek, McCord
Creek, Moffet Creek, Tanner Creek, Eagle Creek, Ruckel Creek, Dry
Creek, Herman Creek, and Harphan Creek.
In Oregon this includes Interstate 84 between mile markers 26 and 54.

Information:
This is a potentially life-threatening situation. If you are near a
creek drainage or debris flow path immediately move to higher and
stable ground, inform affected neighbors, and report any flooding or
debris flow to 9 1 1 and the National Weather Service. Move quickly.
Don`t delay! Save yourself, not your belongings. If escape is not
possible curl into a tight ball to protect your head. Do not drive
across a flooded area or into shallow debris even though it may look
passable.

Flood Advisory  FLOOD ADVISORY   Flood Advisory
PORTLAND

Areas Affected:
Lincoln - Marion - Multnomah - Polk - Tillamook
Effective: Sat, 10/21 11:31pm Updated: Sat, 10/21 11:36pm Urgency: Expected
Expires: Sun, 10/22 11:30am Severity: Minor Certainty: Likely

 
Details:
The National Weather Service in Portland has issued a
* Urban and Small Stream Flood Advisory for...
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...
Clatsop County in northwestern Oregon...
Western Clackamas County in northwestern Oregon...
Western Marion County in northwestern Oregon...
Washington County in northwestern Oregon...
Wahkiakum County in southwestern Washington...
Pacific County in southwestern Washington...
Clark County in southwestern Washington...
Western Cowlitz County in southwestern Washington...
* Until 200 PM PDT Sunday.
* At 2 PM PDT, Doppler radar and rain gauges indicated areas of
heavy rain on the increase. Periods of moderate to heavy rain will
continue through Saturday night and into Sunday morning, with
rainfall totals of 1 to 3 inches in populated areas and higher
amounts in the Coast Range and Cascade foothills. Flooding of some
small streams and ponding of water in poor drainage areas is
likely. Drivers should use extra caution and avoid driving through
flooded areas.

Wind Advisory  WIND ADVISORY   Wind Advisory
PORTLAND

Areas Affected:
Central Willamette Valley - Greater Portland Metro Area - South Willamette Valley
Effective: Sat, 10/21 11:01pm Updated: Sat, 10/21 11:36pm Urgency: Expected
Expires: Sun, 10/22 4:00am Severity: Minor Certainty: Likely

 
Details:
...WIND ADVISORY REMAINS IN EFFECT UNTIL 4 AM PDT SUNDAY...
* WINDS...South winds 15 to 30 mph, with gusts 35 to 50 mph.
Strongest winds will be over the higher exposed terrain, such as
the Chehalem Mountains, foothills near the Coast Range, and the
West Hills of Portland.
* TIMING...Strongest winds likely to occur now through shortly
after midnight. Winds will gradually ease from north to south
across the Willamette Valley later tonight and early Sunday
morning.
* IMPACTS...Gusty winds could result in downed limbs and power
lines. Isolated power outages are possible.

Information:
A Wind Advisory is issued when sustained winds are forecast to be
31 to 39 mph or gusts will range between 45 and 57 mph. Winds of
these magnitudes may cause minor property damage without extra
precautions. Motorists in high profile vehicles should use
caution until the winds subside.

Flash Flood Watch  FLASH FLOOD WATCH   Flash Flood Watch
PORTLAND

Areas Affected:
Central Columbia River Gorge - Western Columbia River Gorge
Effective: Sat, 10/21 1:39pm Updated: Sat, 10/21 11:36pm Urgency: Expected
Expires: Sun, 10/22 2:00pm Severity:  Severe  Certainty: Possible

 
Details:
...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH SUNDAY AFTERNOON
FOR THE EAGLE CREEK BURN AREA IN THE WESTERN AND CENTRAL COLUMBIA
RIVER GORGE...
The Flash Flood Watch continues for
* A portion of Northwest Oregon, including the following areas,
Central Columbia River Gorge and Western Columbia River Gorge.
* Through Sunday afternoon
* As of Saturday afternoon, rainfall rates are increasing in the
Columbia River Gorge. 1 to 2 inches of rain are expected this
afternoon, with an additional 2 to 4 inches expected Saturday
evening through Saturday morning.
* Storm total rainfall for the Eagle Creek burn area through
Sunday are forecasted to be 4 to 7 inches and could possibly
reach 8 or 9 inches in some areas of the burn. This could be
enough rainfall to cause debris-laden flash flooding.

Information:
A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.
Landslides and debris flows are also possible during this heavy
rain 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.
Monitor nearby streams, creeks and storm water drainages for
blockage or sudden rises. Signs that a flash flood or debris flow
may be imminent include: Intense heavy rain and rapid increase in
water levels in creeks, possibly accompanied by increased
muddiness, a sudden decrease in creek water levels even though
rain is still occurring or has only recently stopped, a faint
rumbling sound or sound that increases in volume and sounds of
trees cracking or boulders knocking together.
Be aware that bursts of intense rainfall may be particularly
dangerous, especially after longer periods of moderate steady
rainfall. If you are in areas susceptible to landslides and
debris flows, consider leaving if it is safe to do so. Remember
that driving during an intense storm can be hazardous. If you
remain at home, move to a second story if possible. Staying out
of the path of a flash flood or debris flow saves lives.
Stay alert and awake. Many flash flood and debris flow fatalities
occur when people are sleeping. Watch roads for collapsed
pavement, mud, fallen rocks, and other indications of possible
flash floods or debris flows. Listen to a NOAA Weather Radio or
portable, battery-powered radio or television for warnings of
intense rainfall. If you observe or hear warning signs
immediately move out of the path to higher and stable ground,
inform affected neighbors and report to 9 1 1 and the National
Weather Service. If escape is not possible curl into a tight ball
to protect your head. Do not drive across a flooded road or into
shallow debris even though it may look passable.

Flood Watch  FLOOD WATCH   Flood Watch
PORTLAND

Areas Affected:
Coast Range of Northwest Oregon - Greater Portland Metro Area - Lower Columbia
Effective: Sat, 10/21 11:01pm Updated: Sat, 10/21 11:36pm Urgency: Future
Expires: Sun, 10/22 5:00am Severity:  Moderate  Certainty: Possible

 
Details:
...FLOOD WATCH REMAINS IN EFFECT THROUGH LATE SUNDAY NIGHT FOR
PORTIONS OF NORTHWEST OREGON AND SOUTHWEST WASHINGTON...
The Flood Watch continues for
* Portions of Northwest Oregon and Southwest Washington,
including the following areas, in Northwest Oregon, Central
Willamette Valley, Coast Range of Northwest Oregon, Greater
Portland Metro Area, Lower Columbia, North Oregon Coast,
Northern Oregon Cascade Foothills, and Northern Oregon
Cascades. In Southwest Washington, Central Columbia River
Gorge, Greater Vancouver Area, I-5 Corridor in Cowlitz County,
South Washington Cascade Foothills, South Washington Cascades,
South Washington Coast, Western Columbia River Gorge, and
Willapa Hills.
* Through late Sunday night
* Heavy rain expected on Saturday and Saturday night, with
significant rises expected on many streams and rivers. Rivers
currently forecast to crest above or near flood stage include
the Wilson and Trask in Tillamook County and the Grays in
Wahkiakum County.
* Total rainfall Coast Range and Willapa Hills...4 to 8 inches.
South Washington and north Oregon Cascades... 3 to 7 inches.
Coastal areas... 3 to 6 inches, heaviest north of Lincoln City.
Columbia River Gorge... 3 to 7 inches, including Eagle Creek
burn area. Interior lowlands...1 to 3 inches.

Information:
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.