* WHAT...Temperatures as low as 34 will result in frost formation.
* WHERE...Republic, Wauconda, and Inchelium.
* WHEN...From 2 AM to 8 AM PDT Saturday.
* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive
outdoor plants may be killed if left uncovered.
* WHAT...Sub-freezing temperatures as low as 28 possible.
* WHERE...Priest River, Athol, Wauconda, Metaline Falls, Sandpoint,
Eastport, Tiger, Kettle Falls, Ione, Clark Fork, Northport,
Newport, Metaline, Colville, Inchelium, Bonners Ferry, Chewelah,
Deer Park, Fruitland, Republic.
* WHEN...From late Friday night through Sunday morning.
* IMPACTS...Frost and freeze conditions could kill crops and other
sensitive vegetation.
* WHAT...Sub-freezing temperatures as low as 28 possible.
* WHERE...Chewelah, Inchelium, Metaline Falls, Tiger, Eastport,
Ione, Deer Park, Wauconda, Athol, Priest River, Republic,
Colville, Clark Fork, Newport, Metaline, Fruitland, Northport,
Sandpoint, Kettle Falls.
* WHEN...From late Friday night through Sunday morning.
* IMPACTS...Frost and freeze conditions could kill crops and other
sensitive vegetation.
...DRY AND BREEZY MONDAY AFTERNOON AND EARLY EVENING...
* Affected Area: Fire Weather Zone 708 Eastern Columbia Basin -
Palouse -Spokane Area (Zone 708) and Fire Weather Zone 709
Lower Palouse -Snake River (Zone 709).
* Winds: Southwest 10 to 15 mph with gusts up to 25 mph.
* Relative Humidities: 15 to 22 percent.
* Impacts: Risk of rapidly spreading wildfires.
...DRY AND BREEZY MONDAY AFTERNOON AND EARLY EVENING...
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 7 PM PDT Monday. The Fire Weather Watch is no longer
in effect.
* Affected Area: Fire Weather Zone 708 Eastern Columbia Basin -
Palouse -Spokane Area (Zone 708) and Fire Weather Zone 709
Lower Palouse -Snake River (Zone 709).
* Winds: Southwest 10 to 20 mph with gusts up to 30 mph.
* Relative Humidities: 14 to 21 percent.
* Impacts: Risk of rapidly spreading fires.
...ISOLATED TO SCATTERED THUNDERSTORMS TODAY...
.Isolated to scattered thunderstorms continue to be possible this
afternoon across the Blue/Strawberry/Wallowa Mountains through
the evening hours.
* AFFECTED AREA...Fire Weather Zones 643 Northern Blue Mountains
of Oregon, 645 Wallowa District, 692 Blue Mountains of
Washington and 693 Southeast Washington Grande Ronde Valley.
* IMPACTS...New fire starts and rapid fire spread due to cloud-
to-ground lightning and gusty outflow winds.
* THUNDERSTORMS...Isolated to scattered thunderstorms producing
abundant lightning and gusty outflow winds. Most storms will
be accompanied by light rain.
* OUTFLOW WINDS...Outflow winds are always possible with storms,
and these storms will be capable of producing wind gusts of 30
to 45 mph.
...ISOLATED TO SCATTERED THUNDERSTORMS TODAY...
.Isolated to scattered thunderstorms are expected through afternoon
across the Blue Mountains, adjacent foothills, and portions of the
Columbia Basin as a weather system moves over the region.
* AFFECTED AREA...Fire Weather Zones 643 Northern Blue Mountains
of Oregon, 645 Wallowa District, 692 Blue Mountains of
Washington and 693 Southeast Washington Grande Ronde Valley.
* IMPACTS...New fire starts and rapid fire spread due to cloud-
to-ground lightning and gusty outflow winds.
* THUNDERSTORMS...Isolated to scattered thunderstorms producing
abundant lightning and gusty outflow winds. Most storms will
be accompanied by light rain.
* OUTFLOW WINDS...Outflow winds are always possible with storms,
and these storms will be capable of producing wind gusts of 30
to 45 mph.
...DRY AND BREEZY MONDAY AFTERNOON AND EARLY EVENING...
The National Weather Service in Spokane has issued a Fire Weather
Watch for wind and low relative humidity, which is in effect from
Monday afternoon through Monday evening.
* Affected Area: Fire Weather Zone 708 Eastern Columbia Basin -
Palouse -Spokane Area (Zone 708) and Fire Weather Zone 709
Lower Palouse -Snake River (Zone 709).
* Winds: Southwest 10 to 20 mph with gusts up to 30 mph.
* Relative Humidities: 14 to 22 percent.
* Impacts: Risk of rapidly spreading fires.
...ISOLATED TO SCATTERED THUNDERSTORMS TODAY...
.Isolated thunderstorms have initiated across the southern Blue
Mountains this morning. Additional development is expected through
morning and afternoon across the Blue Mountains as a weather
system moves over the region.
The National Weather Service in Pendleton has issued a Red Flag
Warning for abundant lightning, which is in effect until 11 PM
PDT this evening. The Fire Weather Watch is no longer in effect.
* AFFECTED AREA...Fire Weather Zones 643 Northern Blue Mountains
of Oregon, 645 Wallowa District, 692 Blue Mountains of
Washington and 693 Southeast Washington Grande Ronde Valley.
* IMPACTS...New fire starts and rapid fire spread due to cloud-
to-ground lightning and gusty outflow winds.
* THUNDERSTORMS...Isolated to scattered thunderstorms producing
abundant lightning and gusty outflow winds. Most storms will be
accompanied by light rain.
* OUTFLOW WINDS...Outflow winds are always possible with storms,
and these storms will be capable of producing wind gusts of 30
to 45 mph.
...UNSTABLE CONDITIONS CONTINUE, WITH THUNDERSTORMS DEVELOPING
ONCE AGAIN TONIGHT AND SUNDAY...
.Unstable conditions will persist once again tomorrow, before an
oncoming weather system shifts the threat from instability to that
of thunderstorms. Storms are expected to develop over the eastern
mountains tomorrow afternoon as well, however forecast confidence
remains on the lower end, so will hold off on upgrading the watch
there for now.
* AFFECTED AREA...Fire Weather Zones 643 Northern Blue Mountains
of Oregon, 644 Central Blue Mountains, 645 Wallowa District,
692 Blue Mountains of Washington and 693 Southeast Washington
Grande Ronde Valley.
* IMPACTS...New fire starts and rapid fire spread due to outflow
winds.
* THUNDERSTORMS...Scattered thunderstorms producing abundant
lightning and gusty outflow winds. Most storms will be
accompanied by light rain.
* OUTFLOW WINDS...Outflow winds are always possible with storms,
and these storms will be capable of 30 to 40 mph wind gusts.
...15-30% CHANCE OF THUNDERSTORMS PRODUCING DRY LIGHTNING SATURDAY
AFTERNOON AND EVENING...
* AFFECTED AREA...In Oregon, Fire Weather Zone 688 Mt. Hood
National Forest Region. In Washington, Fire Weather Zone 634
Southern Gifford Pinchot National Forest and Fire Weather Zone
635 Mt. Adams Ranger District of the Gifford-Pinchot National
Forest.
* WINDS...Southeast 5 to 10 mph with gusts up to 15 mph. Brief and
highly localized outflow wind gusts up to 40 mph possible with
any shower or thunderstorm that passes by.
* 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...There is a 15-30% chance of thunderstorms
through 8 PM PDT Saturday over the Cascade mountains. Very
little to no rainfall will accompany any thunderstorm that does
develop, increasing the potential for dry lightning igniting new
wildfire starts.
...UNSTABLE CONDITIONS CONTINUE, WITH THUNDERSTORMS DEVELOPING
ONCE AGAIN TONIGHT AND SUNDAY...
.Unstable conditions will persist once again today, before an
oncoming weather system shifts the threat from instability to that
of thunderstorms. Clearing has been observed across central
Oregon, and with that, scattered thunderstorms are expected to
develop this evening. Storms are expected to develop over the
eastern mountains tomorrow afternoon as well, however forecast
confidence remains on the lower end, so will hold off on upgrading
the watch there for now.
The National Weather Service in Pendleton has issued a Fire
Weather Watch for abundant lightning, which is in effect from
Sunday morning through Sunday evening.
* AFFECTED AREA...Fire Weather Zone 692 Blue Mountains of
Washington.
* IMPACTS...New fire starts and rapid fire spread due to outflow
winds.
* THUNDERSTORMS...Scattered thunderstorms producing abundant
lightning and gusty outflow winds. Most storms will be
accompanied by light rain.
* OUTFLOW WINDS...Outflow winds are always possible with storms,
and these storms will be capable of 30 to 40 mph wind gusts.
...UNSTABLE CONDITIONS CONTINUE, WITH THUNDERSTORMS DEVELOPING
ONCE AGAIN TONIGHT AND SUNDAY...
.Unstable conditions will persist once again today, before an
oncoming weather system shifts the threat from instability to that
of thunderstorms. Clearing has been observed across central
Oregon, and with that, scattered thunderstorms are expected to
develop this evening. Storms are expected to develop over the
eastern mountains tomorrow afternoon as well, however forecast
confidence remains on the lower end, so will hold off on upgrading
the watch there for now.
* AFFECTED AREA...Fire Weather Zones 643 Northern Blue Mountains
of Oregon, 644 Central Blue Mountains, 645 Wallowa District
and 693 Southeast Washington Grande Ronde Valley.
* IMPACTS...New fire starts and rapid fire spread due to outflow
winds.
* THUNDERSTORMS...Scattered thunderstorms producing abundant
lightning and gusty outflow winds. Most storms will be
accompanied by light rain.
* OUTFLOW WINDS...Outflow winds are always possible with storms,
and these storms will be capable of 30 to 40 mph wind gusts.
* AFFECTED AREA...Fire Weather Zone 652 West Portion of the
Olympic Mountains and Fire Weather Zone 661 East Portion of
the Olympic Mountains.
* RELATIVE HUMIDITY...As low as 25 to 30 percent.
* TEMPERATURES...Up to 82.
* HAINES...Mid-level Haines 6.
* IMPACTS...A dry and unstable air mass with warm temperatures
can contribute to active fire behavior. In Western Washington,
significant growth on existing fires takes place under such
conditions. If a fire were to begin, air quality may diminish
in the surrounding area.
* AFFECTED AREA...Fire Weather Zone 658 West Slopes of the North
Cascades Generally above 1500 Feet.
* RELATIVE HUMIDITY...As low as 20 to 25 percent.
* TEMPERATURES...Up to 86.
* HAINES...Mid-level Haines 6.
* IMPACTS...A dry and unstable air mass with warm temperatures
can contribute to active fire behavior. In Western Washington,
significant growth on existing fires takes place under such
conditions. If a fire were to begin, air quality may diminish
in the surrounding area.
* AFFECTED AREA...Fire Weather Zone 659 West Slopes of the
Central Cascades Generally above 1500 Feet.
* RELATIVE HUMIDITY...As low as 20 to 25 percent.
* TEMPERATURES...Up to 86.
* HAINES...Mid-level Haines 6.
* IMPACTS...A dry and unstable air mass with warm temperatures
can contribute to active fire behavior. In Western Washington,
significant growth on existing fires takes place under such
conditions. If a fire were to begin, air quality may diminish
in the surrounding area.
The Southwest Clean Air Agency has continued an Air Quality Advisory,
which is IN EFFECT UNTIL NOON PDT SATURDAY.
An Air Quality Advisory for Smoke remains in effect. Wildfires burning
in the region combined with forecasted conditions will cause air
quality to reach unhealthy levels at times through Saturday morning.
Pollutants in smoke 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.swcleanair.gov
...CRITICAL FIRE WEATHER CONDITIONS CONTINUE THIS WEEKEND...
.Hot, dry, and unstable conditions will continue across central
Oregon today. A Pacific frontal system tracking across eastern
Oregon and far southeast Washington will bring another round of
showers and thunderstorms on Sunday. Storms are not expected to
bring as much lightning as what was observed on Labor Day, but the
potential lightning is enough to warrant Fire Weather Watches.
* AFFECTED AREA...Fire Weather Zones 641 Lower Columbia Basin of
Oregon, 643 Northern Blue Mountains of Oregon, 644 Central
Blue Mountains, 645 Wallowa District and 693 Southeast
Washington Grande Ronde Valley.
* IMPACTS...New fire starts and rapid fire spread due to outflow
winds.
* THUNDERSTORMS...Scattered thunderstorms producing abundant
lightning and gusty outflow winds. Most storms will be
accompanied by light rain.
* OUTFLOW WINDS...Outflow winds are always possible with storms,
and these storms will be capable of 30 to 40 mph wind gusts.
* WHAT...Hot conditions with temperatures up to 95 degrees. This
will pose a moderate to major risk of heat-related illness.
* WHERE...Lower Slopes of the Eastern Washington Cascades Crest.
* WHEN...Until 9 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.
* WHAT...Hot conditions with temperatures up to 100 degrees. This
will pose a moderate to major risk of heat-related illness.
* WHERE...Portions of central, north central, and northeast Oregon
and central, south central, and southeast Washington.
* WHEN...Until 9 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.
