ESFSEW
A frontal system will move across the area Friday into Saturday
across western Washington. Through Saturday afternoon, 3-5 inches of
rain are expected across the mountains, with 0.5-1.5 inches expected
through the lowlands.
Very dry antecedent conditions has left the area soils dry and hard.
This amount of rainfall in one storm will not have much time to soak
into the very dry soil, which will result in heavy surface runoff.
Impacts are uncertain due to how much moisture will be able to be
absorbed by the soil. Several different threats are expected with
this storm, which are detailed below.
*Urban and urban-like flooding will be possible in flat areas and
roadways.
*Some small streams and creeks may become swollen due to rapid
runoff while others may remain lower if the channel bed is able to
absorb the water efficiently.
*Rivers will not flood, but will undergo rapid rises to unusually
high levels for this time of year, some of which may reach daily
record crests. This will pose a threat to those engaged in
recreational activities in and along river channels.
*Burn scars will have the potential to undergo impacts, but the
probability is low. Impacts may include flash flooding, debris
flows, rock falls, and other falling debris.
*Those engaging in recreational activities in the mountains may face
challenges to where high water may make forest roads and trails
difficult to traverse.
Please monitor the latest forecasts from the National Weather
Service for additional information.
Winds have increased through the valley and have brought visbility
reductions caused by blowing dust and regional smoke. Localized
visbility reductions down to three quarters of a mile have been
observed, though the majority of the area are at 2 miles or
higher. Visbility reductions from blowing dust and smoke will
continue through the reaminder of the afternoon.
An Air Quality Alert has been issued by the Olympic Region Clean Air
Agency.
An Air Quality Alert has been issued for Mason County, effective until
9 AM PDT Friday August 15 due to the current wildfire smoke from the
Bear Gulch Fire. Particulate matter (PM 2.5) levels may reach very
unhealthy or hazardous in areas closest to the fire.
Health impacts and recommended actions: When air quality is very
unhealthy or hazardous, everyone should reduce exposure. Stay inside
and filter indoor air to keep it cleaner. Go elsewhere for cleaner
air, if needed. Burning restrictions are in effect.
For current air quality conditions and additional information visit
www.orcaa.org
* Affected Area: Foothills of Northeast Washington (Zone 701),
Colville Reservation (Zone 702), Okanogan Valley (Zone 703),
Methow Valley (Zone 704), Foothills of Central Washington
Cascades (Zone 705), Waterville Plateau (Zone 706), Western
Columbia Basin (Zone 707), Eastern Columbia Basin -Palouse -
Spokane Area (Zone 708) and Lower Palouse -Snake River (Zone
709).
* Winds: West 15 to 25 mph with gusts 30 to 40 mph.
* Relative Humidities: 13 to 24 percent.
* Impacts: Rapid fire spread is likely with any new or existing
fires.
* WHAT...Visibility one quarter mile or less in dense fog. Beaches,
headlands, and coastal areas will be most impacted.
* WHERE...South Washington and North and Central Oregon Coast.
* WHEN...Until 11 AM PDT this morning.
* IMPACTS...Low visibility could make driving conditions hazardous.
* ADDITIONAL DETAILS...Fog and low stratus will be patchy along the
north Oregon and south Washington Coast, but when it does form, it
will be dense. Highest concentration of dense fog will be from
Lincoln City south towards Florence. Areas from Cannon Beach north
will see fog burn off the quickest in the morning.
...BREEZY WINDS WITH LOW RELATIVE HUMIDITY THROUGH WEDNESDAY...
.An approaching weather system will result in breezy winds
accompanied by low relative humidity across south-central to
southeast Washington and central to northeast Oregon.
* AFFECTED AREA...Fire Weather Zones 690 Kittitas Valley, 691
Lower Columbia Basin of Oregon, 691 Lower Columbia Basin of
Washington, 692 Blue Mountains of Washington, 693 Canyon
Grasslands of Wallowa County, 693 Southeast Washington Grande
Ronde Valley, 694 Yakama Alpine District, 701 Eastern Columbia
River Gorge of Oregon and 702 East Slopes of the Mt. Hood
National Forest.
* TIMING...From noon to 9 PM PDT Wednesday.
* WINDS...West 15 to 25 mph with gusts of 25 to 40 mph.
* RELATIVE HUMIDITY...As low as 12 percent.
* IMPACTS...Any fire that develops will catch and spread
quickly. Outdoor burning is not recommended.
* WHAT...Visibility one quarter mile or less in dense fog. Beaches,
headlands, and coastal areas will be most impacted.
* WHERE...South Washington and North and Central Oregon Coast.
* WHEN...From 1 AM to 11 AM PDT Wednesday.
* IMPACTS...Low visibility could make driving conditions hazardous.
* ADDITIONAL DETAILS...Fog and low stratus will be patchy along the
north Oregon and south Washington Coast, but when it does form, it
will be dense. Highest concentration of dense fog will be from
Lincoln City south towards Florence. Areas from Cannon Beach north
will see fog burn off the quickest in the morning.
* WHAT...Northwest winds 25 to 35 mph with gusts of 40 to 50 mph
expected.
* WHERE...Kittitas Valley.
* WHEN...From 2 PM to 8 PM PDT Wednesday.
* IMPACTS...Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.
* WHAT...Hot conditions with high temperatures in the upper 80s to
mid 90s today will result in a moderate risk of heat-related
illness.
* WHERE...Portions of northwest and west central Washington.
* WHEN...Until 10 PM PDT this evening.
* IMPACTS...Heat will significantly increase the risk of
heat-related illnesses for those who are sensitive to heat,
especially those without effective cooling or adequate hydration.
...BREEZY WINDS WITH LOW RH VALUES THROUGH WEDNESDAY...
.An approaching system will result in breezy winds Tuesday and
Wednesday as hot and dry conditions persist. Main concerns
Tuesday are focused across Central Oregon, extending into Central
Washington Wednesday.
The National Weather Service in Pendleton has issued a Red Flag
Warning for wind and low relative humidity, which is in effect
from noon to 9 PM PDT Wednesday. The Fire Weather Watch is no
longer in effect.
* AFFECTED AREA...Fire Weather Zones 690 Kittitas Valley, 691
Lower Columbia Basin of Washington, 692 Blue Mountains of
Washington, 693 Canyon Grasslands of Wallowa County, 693
Southeast Washington Grande Ronde Valley and 694 Yakama Alpine
District.
* TIMING...From noon to 9 PM PDT Wednesday.
* WINDS...West 15 to 25 mph with gusts up to 35 mph.
* RELATIVE HUMIDITY...As low as 12 percent.
* IMPACTS...Any fire that develops will catch and spread
quickly. Outdoor burning is not recommended.
The National Weather Service in Spokane has issued a Red Flag
Warning for wind and low relative humidity, which is in effect
from noon to 9 PM PDT Wednesday. The Fire Weather Watch is no
longer in effect.
* Affected Area: Foothills of Northeast Washington (Zone 701),
Colville Reservation (Zone 702), Okanogan Valley (Zone 703),
Methow Valley (Zone 704), Foothills of Central Washington
Cascades (Zone 705), Waterville Plateau (Zone 706), Western
Columbia Basin (Zone 707), Eastern Columbia Basin -Palouse -
Spokane Area (Zone 708) and Lower Palouse -Snake River (Zone
709).
* Winds: West 15 to 25 mph with gusts up to 35 mph.
* Relative Humidities: 13 to 25 percent.
* Impacts: Rapid fire spread is likely with any new or existing
fires.
* WHAT...Temperatures of 93 to 98 degrees.
* WHERE...North and Central Coast Range Valleys of Oregon, Lower
Columbia River and Cowlitz River Valleys, Willapa and Wahkiakum
Lowlands, and South Washington Cascade Foothills.
* WHEN...Until 10 PM PDT this evening.
* IMPACTS...Hot temperatures may cause heat illnesses.
* WHAT...Dangerously hot conditions with temperatures of 97 to 101
degrees.
* WHERE...Greater Portland/Vancouver Metro, Western and Central
Columbia River Gorge, the Corbett area and the Hood River Valley,
Central and Southern Willamette Valley, and Foothills of the
Northern and Central Oregon Cascades.
* WHEN...Until 10 PM PDT this evening.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
* ADDITIONAL DETAILS...Overnight conditions will begin to cool on
Tuesday night into Wednesday.
* WHAT...Dangerously hot conditions with temperatures 100 to 103
degrees expected. This will pose a moderate to major risk of
heat-related illness. For the Wind Advisory, northwest winds 25 to
35 mph with gusts up to 50 mph expected.
* WHERE...Kittitas Valley.
* WHEN...For the Extreme Heat Warning, until 10 PM PDT this evening.
For the Wind Advisory, from 2 PM to 8 PM PDT Wednesday.
* IMPACTS...Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result. Heat
related illnesses increase significantly during extreme heat
events. Extreme heat will significantly increase the risk of
heat-related illnesses for much of the population, especially
those who are heat sensitive and those without effective cooling
or adequate hydration.
* WHAT...Dangerously hot conditions with temperatures 99 to 102
degrees expected. This will pose a moderate to locally major risk
of heat-related illness.
* WHERE...In Oregon, Central Oregon, John Day Basin, Foothills of
the Southern Blue Mountains of Oregon, and North Central Oregon.
In Washington, Simcoe Highlands.
* WHEN...Until 10 PM PDT this evening.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
* WHAT...Dangerously hot conditions with temperatures 100 to 103
degrees expected. This will pose a moderate to major risk of
heat-related illness.
* WHERE...Eastern Columbia River Gorge of Oregon and Washington,
Lower Columbia Basin of Oregon and Washington, Foothills of the
Northern Blue Mountains of Oregon, Yakima Valley, and Foothills of
the Blue Mountains of Washington.
* WHEN...Until 10 PM PDT this evening.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events. Extreme heat will significantly increase the
risk of heat-related illnesses for much of the population,
especially those who are heat sensitive and those without
effective cooling or adequate hydration.
* WHAT...Dangerously hot conditions with temperatures 100 to 103
degrees expected. This will pose a moderate to major risk of
heat-related illness. For the Wind Advisory, northwest winds 25 to
35 mph with gusts up to 50 mph expected.
* WHERE...Kittitas Valley.
* WHEN...For the Extreme Heat Warning, until 10 PM PDT this evening.
For the Wind Advisory, from 2 PM to 8 PM PDT Wednesday.
* IMPACTS...Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result. Heat
related illnesses increase significantly during extreme heat
events. Extreme heat will significantly increase the risk of
heat-related illnesses for much of the population, especially
those who are heat sensitive and those without effective cooling
or adequate hydration.
* WHAT...Hot conditions with high temperatures in the upper 80s to
mid 90s today will result in a moderate risk of heat-related
illness.
* WHERE...Portions of northwest and west central Washington.
* WHEN...Until 10 PM PDT this evening.
* IMPACTS...Heat will significantly increase the risk of
heat-related illnesses for those who are sensitive to heat,
especially those without effective cooling or adequate hydration.
An Air Quality Alert has been issued by the Olympic Region Clean Air
Agency.
An Air Quality Alert has been issued for Mason County, effective until
9 AM PDT Friday August 15 due to the current wildfire smoke from the
Bear Gulch Fire. Particulate matter (PM 2.5) levels may reach very
unhealthy or hazardous in areas closest to the fire.
Health impacts and recommended actions: When air quality is very
unhealthy or hazardous, everyone should reduce exposure. Stay inside
and filter indoor air to keep it cleaner. Go elsewhere for cleaner
air, if needed. Burning restrictions are in effect.
For current air quality conditions and additional information visit
www.orcaa.org
* WHAT...Hot temperatures. High temperatures 98 to 103 degrees.
Limited overnight relief with low temperatures 67 to 75.
* WHERE...Ephrata, Quincy, Wenatchee, Pangborn Airport, Entiat,
Chelan, Cashmere, Moses Lake, and Othello.
* WHEN...Until 8 PM PDT this evening.
* IMPACTS...Hot temperatures will increase the risk of heat-related
illnesses. Heat of this magnitude affects anyone without cooling
and hydration as well as health systems and industries.
