* IMPACTS...Thunderstorms can cause new fire starts and spread
fires quickly due to outflow winds.
* AFFECTED AREA...In ORZ624...northern portions of fire weather
zone 624 from Chemult north and northeast. In ORZ625...
northern portions of Fire weather zone 625 from Summer Lake
north.
* THUNDERSTORMS...Isolated to scattered thunderstorms are
expected to develop this afternoon and evening. Storms may be
dry with little or no rainfall.
* OUTFLOW WINDS...Strong, gusty outflows up to around 45 mph
are expected near storms.
* DETAILED URL...View the hazard area in detail at
https://www.wrh.noaa.gov/map/?wfo=mfr
...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.
...15-20% CHANCE OF THUNDERSTORMS PRODUCING DRY LIGHTNING
SATURDAY AFTERNOON AND EVENING...
* AFFECTED AREA...In Oregon, Fire Weather Zone 689 Northern
Willamette National Forest and Fire Weather Zone 690 Southern
Willamette National Forest.
* WINDS...West around 5 mph with gusts up to 10 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 25 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 15-20% 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.
The National Weather Service in Medford has issued a Red Flag
Warning, which is in effect until 9 PM PDT this evening.
* IMPACTS...Any fires that develop will likely spread rapidly.
* AFFECTED AREA...In ORZ624...northern portions of fire weather
zone 624 from Chemult north and northeast. In ORZ625...northern
portions of Fire weather zone 625 from Summer Lake north.
* THUNDERSTORMS...Isolated to scattered thunderstorms are expected
to develop this afternoon and evening. Storms may be dry with
little or no rainfall.
* OUTFLOW WINDS...Strong, gusty outflows up to around 45 mph are
expected near storms.
* DETAILEDURL...View the hazard area in detail at
https://www.wrh.noaa.gov/map/?wfo=mfr
...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.
...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 Red Flag
Warning for abundant lightning, which is in effect until 11 PM
PDT this evening.
* AFFECTED AREA...Fire Weather Zones 610 East Slopes of Central
Oregon Cascades and 611 Deschutes National Forest -minus
Sisters Ranger District.
* TIMING...Now through Saturday evening.
* RELATIVE HUMIDITY...As low as 15 percent.
* TEMPERATURES...Up to 85.
* IMPACTS...New fire starts, as well as rapid fire spread due to
outflow winds.
* ADDITIONAL INFORMATION...Isolated to scattered thunderstorms
are forecast for this afternoon and evening that may also bring
new starts to the area.
* THUNDERSTORMS...Scattered thunderstorms producing abundant
lightning and gusty outflow winds. Storms are expected to be dry
in nature.
* OUTFLOW WINDS...Storms may be capable of producing outflow winds
up to and over 40 mph.
...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 Red Flag
Warning for abundant lightning, which is in effect until 11 PM
PDT this evening. The previous Red Flag Warning for dry and
unstable conditions is no longer in effect.
* AFFECTED AREA...Fire Weather Zone 640 Central Mountains of
Oregon.
* TIMING...Now through Saturday evening.
* RELATIVE HUMIDITY...As low as 12 percent.
* TEMPERATURES...Up to 90.
* IMPACTS...New fire starts, as well as rapid fire spread due to
outflow winds.
* ADDITIONAL INFORMATION...Light shower activity and cloud cover
this morning has brought the Haines Index in the area below
critical thresholds. Dry thunderstorms are now the primary
critical fire weather threat for the zone.
* THUNDERSTORMS...Scattered thunderstorms producing abundant
lightning and gusty outflow winds. Storms are expected to be dry
in nature.
* OUTFLOW WINDS...Storms may be capable of producing outflow winds
up to and over 40 mph.
...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 Zone 642 Southern Blue and
Strawberry Mountains.
* TIMING...Now through Saturday evening.
* RELATIVE HUMIDITY...As low as 11 percent.
* TEMPERATURES...Up to 87.
* IMPACTS...Possible plume dominated fire behavior.
* ADDITIONAL INFORMATION...Isolated thunderstorms are forecast
for this afternoon and evening that may also bring new starts
to the area.
* HAINES...As high as 6.
Air quality around Government Camp, Timothy Lake, Bennett Pass, and
Lost Lake has improved this afternoon. Onshore flow will allow air
quality to improve through Sunday. Patchy area of smoke may still be
present in areas close to wildfires.
More information about air quality can be found at:
www.oregon.gov/DEQ
The Oregon Department of Environmental Quality has issued an Air
Quality Advisory, which is IN EFFECT UNTIL 6 PM PDT SUNDAY.
An Air Quality Advisory for Smoke has been issued. Wildfires burning
in the region combined with forecasted conditions will cause air
quality to reach unhealthy levels at times through Sunday evening.
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.oregon.gov/DEQ
...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.
...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 640 Central Mountains of
Oregon and 642 Southern Blue and Strawberry Mountains.
* TIMING...Now through Saturday evening.
* RELATIVE HUMIDITY...As low as 11 percent.
* TEMPERATURES...Up to 92.
* IMPACTS...Possible plume dominated fire behavior.
* ADDITIONAL INFORMATION...Isolated thunderstorms are forecast for
this afternoon and evening that may also bring new starts to
the area.
* HAINES...As high as 6.
* WHAT...Hot conditions with temperatures up to 95 degrees. This
will pose a moderate to major risk of heat-related illness.
* WHERE...Ochoco-John Day Highlands and Southern Blue Mountains of
Oregon.
* 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.
...CRITICAL FIRE WEATHER CONDITIONS CONTINUE THIS WEEKEND...
.Hot, dry and unstable conditions have been observed across
eastern Oregon. 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.
...CRITICAL FIRE WEATHER CONDITIONS CONTINUE THIS WEEKEND...
.Hot, dry and unstable conditions have been observed across
eastern Oregon. 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 640 Central Mountains of
Oregon and 642 Southern Blue and Strawberry Mountains.
* TIMING...Now through Saturday evening.
* RELATIVE HUMIDITY...As low as 12 percent.
* TEMPERATURES...Up to 92.
* IMPACTS...Possible plume dominated fire behavior.
* ADDITIONAL INFORMATION...Isolated thunderstorms are forecast
for Saturday evening that may also bring new starts to the
area.
* HAINES...As high as 6.
...CRITICAL FIRE WEATHER CONDITIONS CONTINUE THIS WEEKEND...
.Hot, dry and unstable conditions have been observed across
eastern Oregon. There are scattered thunderstorms in the southern
Deschutes National Forest that prompted Red Flag Warnings. 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.
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 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.
...CRITICAL FIRE WEATHER CONDITIONS CONTINUE THIS WEEKEND...
.Hot, dry and unstable conditions have been observed across
eastern Oregon. There are scattered thunderstorms in the southern
Deschutes National Forest that prompted Red Flag Warnings. 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 640 Central Mountains of
Oregon and 642 Southern Blue and Strawberry Mountains.
* TIMING...Now through Saturday evening.
* RELATIVE HUMIDITY...As low as 10 percent.
* TEMPERATURES...Up to 92.
* IMPACTS...Possible plume dominated fire behavior.
* ADDITIONAL INFORMATION...Isolated thunderstorms are forecast for
Saturday evening that may also bring new starts to the area.
* HAINES...As high as 6.
...CRITICAL FIRE WEATHER CONDITIONS CONTINUE THIS WEEKEND...
.Hot, dry and unstable conditions have been observed across
eastern Oregon. There are scattered thunderstorms in the southern
Deschutes National Forest that prompted Red Flag Warnings. 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 610 East Slopes of Central
Oregon Cascades and 611 Deschutes National Forest -minus
Sisters Ranger District.
* TIMING...Now through midnight tonight.
* IMPACTS...New fire starts and possible rapid fire spread with
gusty outflow winds.
* THUNDERSTORMS...Scattered thunderstorms producing occasional
cloud to ground lightning and light rain. LAL 3
* OUTFLOW WINDS...Storms are capable of outflow winds 25 to 35
mph.
* 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...East 5 to 10 mph with gusts up to 15 mph.
* RELATIVE HUMIDITY...As low as 15 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...While winds have weakened significantly
Friday evening, unstable conditions remain in place.
