* WHAT...South to southeast winds 20 to 30 mph with gusts up to 45
mph expected.
* WHERE...Greater Portland/Vancouver Metro, Central and Southern
Willamette Valley, and Lower Columbia River and Cowlitz River
Valleys.
* WHEN...Until 4 AM PST Wednesday.
* IMPACTS...Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.
ESFPQR
It is shaping up to be a wet week ahead. Of particular concern is the
potential for heavy rain Tuesday night through Friday morning, which
could result in some flooding for area creeks and rivers.
Current projections of the most likely amounts for storm total
precipitation range from 5 to 8 inches for the Coast, Coast Range,
and Cascades, with 2.5 to 4 inches for inland valley locations,
including Portland, Salem, and Eugene. Upper end projections, with
about a 10 percent chance of occurring, range from 6 to 11 inches
for the Coast, Coast Range, and Cascades, with 5 to 7 inches for
inland valleys. Snowmelt in the Cascades from 2000 to 4000 feet
elevation could add runoff, although the main cause for flooding
would be the heavy rain.
Rivers will rise starting Wednesday. Small streams and
fast-responding rivers could see flooding as early as Wednesday
night or Thursday, with slow-responding rivers potentially flooding
by this weekend. Heavy rainfall will also cause water ponding in low
lying areas and other areas of poor drainage.
Monitor weather.gov/portland for the latest updates and any watches,
warnings, or advisories that may be issued for this event.
* WHAT...Urban and small stream flooding caused by excessive
rainfall is expected.
* WHERE...Most areas across southwest Washington and northwest
Oregon.
* WHEN...Until 415 PM PST Wednesday.
* IMPACTS...Minor flooding in low-lying and poor drainage areas.
Ponding of water in urban or other areas is expected overnight
into Wednesday.
* ADDITIONAL DETAILS...
- At 410 PM PST, Rain will increase this evening, with rain
becoming heavy at times overnight. This will cause areas of
urban and small stream flooding. Overflowing poor drainage
areas will cause minor flooding in the advisory area. In
addition, leaf-clogged storm drains will create poor
drainage, resulting in flooded roadways and intersections.
- Additional rainfall amounts of 1 to 4 inches are expected
tonight into Wednesday, with the 2 to 5 inches along the
coast into the Coast Range and Willapa Hills. Heaviest rain
will end by 8 am Wednesday, but poor drainage issues may
continue through the day.
- Some locations that will experience flooding include...
Eugene, Salem, Hillsboro, Corvallis, Albany, McMinnville,
Oregon City, Battle Ground, Dallas, Washougal, St. Helens,
Kelso, Newport, Sandy, Astoria, Sweet Home, Florence, Lincoln
City, Seaside and Sheridan.
- http://www.weather.gov/safety/flood
* WHAT...Visibility one quarter mile or less in areas of dense fog.
Fog will be most prevalent along rivers and lakes.
* WHERE...Willamette Valley, Greater Portland and Vancouver Metro,
Foothills of the Northern and Central Oregon Cascades, North and
Central Coast Range Valleys of Oregon, Lower Columbia River and
Cowlitz River Valleys Including I-5, Willapa and Wahkiakum
Lowlands, and South Washington Cascade Foothills.
* WHEN...Until 10 AM PDT Saturday.
* IMPACTS...Low visibility could make driving conditions hazardous.
* AFFECTED AREA...In Oregon, Fire Weather Zone 684 Northern and
Central Willamette Valley. In Washington, Fire Weather Zone
633 Clark County Lowlands and Swift Reservoir Region.
* WINDS...North 5 to 10 mph with gusts to 20 to 25 mph.
* RELATIVE HUMIDITY...As low as 20 percent.
* IMPACTS...Conditions may be favorable for rapid fire spread
which may threaten life and property. Use extra caution with
potential ignition sources, especially in grassy areas.
Outdoor burning is not recommended.
* ADDITIONAL DETAILS...Within the Willamette Valley, the Red Flag
Warning is specifically for areas around the Portland Metro area
from Oregon City northward east of I-5. This also includes Clark
County east of I-5 near the Columbia River Gorge.
The Oregon Department of Environmental Quality has continued
an Air Quality Advisory, which is IN EFFECT UNTIL 8 PM PDT FRIDAY.
An Air Quality Advisory for ozone remains in effect. High levels of
ozone in the lower atmosphere in the region combined with forecasted
conditions will cause air quality to reach unhealthy levels at times
through 8 PM PDT Friday.
Pollutants can cause burning eyes, runny nose, aggravate heart and
lung diseases, and aggravate other serious health problems. Limit
outdoor activities and keep children indoors if it is smoky. Please
follow medical advice if you have a heart or lung condition.
More information about air quality can be found at:
www.oregon.gov/DEQ
* WHAT...Dangerously hot conditions with temperatures around 100
expected. Overnight lows in the upper 50s to near 70, warmest in
urban areas, Columbia River Gorge, and Cascade Foothills and
Valleys.
* WHERE...Portions of northwest and west central Oregon and
southwest Washington.
* WHEN...Until 10 PM PDT Friday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
* WHAT...Dangerously hot conditions with temperatures around 100
expected. Overnight lows in the upper 50s to near 70, warmest
in urban areas, Columbia River Gorge, and Cascade foothills
and valleys.
* WHERE...Portions of northwest and west central Oregon and
southwest Washington.
* WHEN...From noon Thursday to 10 PM PDT Friday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
* ADDITIONAL DETAILS...Conditions begin to warm on Wednesday
with highs of 90 to 95.
* AFFECTED AREA...In Oregon, Fire Weather Zone 684 Northern
Willamette Valley near the Gorge. In Washington, Fire Weather
Zone 633 Clark County Lowlands and Swift Reservoir Region.
* WINDS...Northeast 5 to 15 mph with gusts 20 to 25 mph.
* RELATIVE HUMIDITY...20 to 30 percent.
* IMPACTS...Conditions may be favorable for rapid fire spread
which may threaten life and property. Use extra caution with
potential ignition sources, especially in grassy areas.
Outdoor burning is not recommended.
* ADDITIONAL DETAILS...Within the Willamette Valley, the Red Flag
Warning is specifically for areas around the Portland-Metro
area near the entrance to the Columbia River Gorge and from
Oregon City northward east of I-5.
* WHAT...Dangerously hot conditions with temperatures around 100
expected. Overnight lows in the upper 50s to near 70, warmest in
urban areas, Columbia River Gorge, and Cascade foothills and
valleys.
* WHERE...Portions of northwest and west central Oregon and
southwest Washington.
* WHEN...From noon Thursday to 10 PM PDT Friday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
* ADDITIONAL DETAILS...Conditions begin to warm on Wednesday with
highs of 90 to 95.