* IMPACTS...Abundant lightning on dry fuels resulting in the
potential for numerous new fire starts. Any fires that develop
will likely spread rapidly.
* AFFECTED AREA...In Oregon...the northern half of Fire weather
zones 624 and 625. This includes the Fremont and Winema
National Forests north of the Sprague River Valley and also
the area north and west of Abert Rim.
* THUNDERSTORMS...Isolated to scattered thunderstorms.
Lightning strikes outside of precipitation cores are
possible, and cause for concern.
* OUTFLOW WINDS...Gusts of 40 to 55 mph could travel outward up
to 25 miles from thunderstorm cores.
* DETAILED URL...View the hazard area in detail at
https://www.wrh.noaa.gov/map/?wfo=mfr
* WHAT...Hot conditions with temperatures up to 105 degrees
expected. This will pose a major risk of heat-related illness.
* WHERE...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...From 11 AM to 9 PM PDT Tuesday.
* IMPACTS...Hot temperatures may cause heat illnesses. 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.
...DRY THUNDERSTORMS EXPECTED FOR TUESDAY AFTERNOON THROUGH
TUESDAY EVENING FOR ABUNDANT LIGHTNING FOR THE CENTRAL MOUNTAINS
OF OREGON AND SOUTHERN DESCHUTES NATIONAL FOREST...
.The ridge of high pressure is anticipated to break down Tuesday
afternoon with a dry cold front making its way into the region.
Ahead of the front, instability is expected to increase along with
an influx of mid-level moisture. This will lead to convection
along the central mountains of Oregon and through the southern
Deschutes National Forest Tuesday afternoon. Dry thunderstorms
will be isolated.
The National Weather Service in Pendleton has issued a Fire
Weather Watch for abundant lightning, which is in effect from
Tuesday afternoon through Tuesday evening.
* AFFECTED AREA...Fire Weather Zones 700 Central Mountains of
Oregon and 705 Southern Deschutes National Forest.
* TIMING...From Tuesday afternoon through Tuesday evening.
* IMPACTS...Any fire that develops will catch and spread
quickly. Outdoor burning is not recommended.
* THUNDERSTORMS...Storms are mostly expected to be dry with
rainfall amounts less than a tenth of an inch, though a few
storms could produce rainfall amounts in excess of a tenth of an
inch.
* OUTFLOW WINDS...As high as 45 mph.
The National Weather Service in Medford has issued a Fire Weather
Watch, which is in effect from Tuesday afternoon through Tuesday
evening.
* IMPACTS...Abundant lightning on dry fuels resulting in the
potential for numerous new fire starts. Any fires that develop
will likely spread rapidly.
* AFFECTED AREA...In Oregon...the northern half of Fire weather
zones 624 and 625. This includes the Fremont and Winema National
Forests north of the Sprague River Valley and also the area
north and west of Abert Rim.
* THUNDERSTORMS...Isolated to scattered thunderstorms. Lightning
strikes outside of precipitation cores are possible, and cause
for concern.
* OUTFLOW WINDS...Gusts of 40 to 55 mph could travel outward up to
25 miles from thunderstorm cores.
* DETAILED URL...View the hazard area in detail at
https://www.wrh.noaa.gov/map/?wfo=mfr
At 649 PM PDT, Doppler radar was tracking a strong thunderstorm 7
miles west of Drewsey, or 31 miles northeast of Burns, moving east at
20 mph.
HAZARD...Wind gusts up to 40 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Areas of blowing dust possible. Minor
damage to outdoor objects is possible.
This strong thunderstorm will be near...
Drewsey around 700 PM PDT.
Drinkwater Pass around 720 PM PDT.
At 627 PM PDT, Doppler radar was tracking a strong thunderstorm over
Lawen, or 17 miles southeast of Burns, moving northeast at 35 mph.
HAZARD...Wind gusts up to 40 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Areas of blowing dust possible. Minor
damage to outdoor objects is possible.
This strong thunderstorm will be near...
Coleman Mountain around 700 PM PDT.
At 623 PM PDT, Doppler radar was tracking a strong thunderstorm 8
miles northwest of Mount Vernon, or 14 miles northwest of John Day,
moving east at 10 mph.
HAZARD...Wind gusts up to 50 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
John Day, Canyon City, Mount Vernon, and Fox.
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of northeast and southeast Oregon, including the
following counties, in northeast Oregon, Baker County. In
southeast Oregon, Harney County and Malheur County.
* WHEN...Until 8 PM PDT /9 PM MDT/ this evening.
* IMPACTS...Heavy rainfall could trigger flash flooding or debris
flows in and near recent wildfire burn scars.
* ADDITIONAL DETAILS...
- National Weather Service Meteorologists are forecasting heavy
rainfall over the burn scar, which may lead to flash flooding
and debris flows.
- https://www.weather.gov/safety/flood
At 341 PM PDT, Doppler radar was tracking a cluster of strong
thunderstorms near Sheep Rock, or 38 miles southeast of John Day,
moving northeast at 40 mph.
HAZARD...Wind gusts up to 50 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Areas of blowing dust reducing
visibilities. Minor damage to outdoor objects is possible.
This strong thunderstorm will be near...
Ironside Mountain around 450 PM MDT.
Ironside and Eldorado Pass around 500 PM MDT.
Baldy Mountain around 510 PM MDT.
At 334 PM PDT, Doppler radar was tracking a strong thunderstorm near
Swamp Creek Buttes, or 40 miles northwest of Rome, moving east at 30
mph.
HAZARD...Wind gusts up to 50 mph and half inch hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Areas of blowing dust reducing
visibilities. Minor damage to outdoor objects is possible.
This strong thunderstorm will be near...
Turnbull Mountain around 440 PM MDT.
Copeland Butte around 450 PM MDT.
Knottingham Butte around 510 PM MDT.
* WHAT...There is a threat of flash flooding caused by excessive
rainfall from thunderstorms through this evening.
* WHERE...Southeast Oregon.
* WHEN...Until 8 PM PDT /9 PM MDT/ this evening.
* IMPACTS...Heavy rainfall could trigger flash flooding or debris
flows in and near recent wildfire burn scars.
* ADDITIONAL DETAILS...
- There is a risk for heavy rainfall over the burn scar, which
may lead to flash flooding and debris flows.
- https://www.weather.gov/safety/flood
At 110 PM MDT, Doppler radar was tracking a cluster of strong
thunderstorms over Owyhee, or near Parma, moving northeast at 30 mph.
HAZARD...Wind gusts up to 40 mph and half inch hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Areas of blowing dust reducing
visibilities. Minor damage to outdoor objects is possible.
This strong thunderstorm will be near...
Nyssa around 120 PM MDT.
New Plymouth around 130 PM MDT.
* WHAT...There is a threat of flash flooding caused by excessive
rainfall from thunderstorms through this evening.
* WHERE...Southeast Oregon
* WHEN...Until 8 PM PDT /9 PM MDT/ this evening.
* IMPACTS...Heavy rainfall could trigger flash flooding or debris
flows in and near recent wildfire burn scars.
* ADDITIONAL DETAILS...
- There is a risk for heavy rainfall over the burn scar, which
may lead to flash flooding and debris flows.
- https://www.weather.gov/safety/flood
* AFFECTED AREA...Much of Fire Weather Zone 625, including Adel,
Paisley, Summer Lake, Fort Rock and areas eastward.
* THUNDERSTORMS...Isolated thunderstorms continue this morning,
and will increase in coverage to scattered this afternoon and
evening.
* OUTFLOW WINDS...Gusts up to 45 mph. These outflow winds can
travel up to 25 miles away from the thunderstorm that caused
it.
* DETAILED URL...View the hazard area in detail at
https://www.wrh.noaa.gov/map/?wfo=mfr
The National Weather Service in Medford has issued a Red Flag
Warning, which is in effect from 2 PM this afternoon to 8 PM PDT
this evening.
* AFFECTED AREA...Much of Fire Weather Zone 624 northeast of
Klamath Falls. This includes Lakeview, Chiloquin, Chemult, and
the Freemont-Winema National Forest.
* THUNDERSTORMS...Isolated thunderstorms continue this morning,
and will increase in coverage to scattered this afternoon and
evening.
* OUTFLOW WINDS...Gusts up to 45 mph. These outflow winds can
travel up to 25 miles away from the thunderstorm that caused
it.
* DETAILED URL...View the hazard area in detail at
https://www.wrh.noaa.gov/map/?wfo=mfr
Thunderstorms will be capable of producing locally heavy rainfall
today, especially this afternoon and evening, over last year's burn
scars in the Ochoco-John Day Highlands.
* WHAT...Flash flooding and debris flows caused by excessive
rainfall are possible over the Falls, Crazy Creek, Rail Ridge, and
Wiley Flat burn scars.
* WHERE...A portion of central Oregon, including the following area,
Ochoco-John Day Highlands.
* WHEN...Until 8 PM PDT this evening.
* IMPACTS...Moderate to heavy rainfall over the Falls, Crazy Creek,
Rail Ridge, and Wiley Flat burn scars is expected during the
period of the watch. Anyone in or near the Falls, Crazy Creek,
Rail Ridge, and Wiley Flat burn scars should prepare for potential
flooding impacts. Be sure to stay up to date with information from
local authorities. Heavy rainfall could trigger flash flooding and
debris flows in and near recent wildfire burn scars.
* ADDITIONAL DETAILS...
- National Weather Service Meteorologists are forecasting heavy
rainfall over the burn scars, which may lead to flash
flooding and debris flows.
- http://www.weather.gov/safety/flood
* AFFECTED AREA...In Oregon, Fire Weather Zone 670 Burns BLM.
* TIMING...Until 8 PM PDT this evening.
* WINDS...Northwest 10 to 15 mph with gusts up to 25 mph.
* RELATIVE HUMIDITY...As low as 25 percent.
* IMPACTS...Any fire that develops will catch and spread
quickly. Outdoor burning is not recommended.
* THUNDERSTORMS...Scattered.
* OUTFLOW WINDS...Isolated gusts up to 50 mph.
...RED FLAG WARNING FOR SCATTERED LIGHTNING THIS EVENING...AND
AGAIN EARLY FRIDAY MORNING THROUGH LATE FRIDAY EVENING IN
SOUTHEAST OREGON...
.Scattered thunderstorms will increase early this morning in
southeast Oregon. Several rounds of thunderstorms are likely
through late this evening.
Gusty outflow winds and lightning, combined with low humidity this
afternoon, will continue to cause critical fire weather
conditions.
* AFFECTED AREA...In Oregon, Fire Weather Zones 670 Burns BLM,
672 Southern Grasslands, 673 Central Canyonlands and 674
Northwestern Vale BLM.
* TIMING...Until 11 PM MDT /10 PM PDT/ this evening.
* WINDS...
* RELATIVE HUMIDITY...
* IMPACTS...Any fire that develops will catch and spread
quickly. Outdoor burning is not recommended.
* THUNDERSTORMS...Scattered.
* OUTFLOW WINDS...Isolated gusts up to 50 mph.
* IMPACTS...Given the long stretch of dry and hot conditions,
lightning efficiency will be moderate for new fire starts. Any
fires that develop will likely spread rapidly.
* AFFECTED AREA...Mostly north of Summer Lake through tonight.
Friday afternoon includes areas near Paisley and north.
* THUNDERSTORMS...Scattered thunderstorms into early Friday
morning. Another round of scattered thunderstorms is expected
Friday afternoon.
* OUTFLOW WINDS...Gusts up to 45 mph. These outflow winds can
travel up to 25 miles away from the thunderstorm that caused
it.
* ADDITIONAL INFORMATION...Some storms could be dry with gusty
outflows. Any overnight storms are more likely to produce
significantly less precipitation, or be completely dry.
* DETAILED URL...View the hazard area in detail at
https://www.wrh.noaa.gov/map/?wfo=mfr
* IMPACTS...Given the long stretch of dry and hot conditions,
lightning efficiency will be moderate for new fire starts. Any
fires that develop will likely spread rapidly.
* AFFECTED AREA...Mostly north of Summer Lake through tonight.
Friday afternoon includes areas near Paisley and north.
* THUNDERSTORMS...Scattered thunderstorms into early Friday
morning. Another round of scattered thunderstorms is expected
Friday afternoon.
* OUTFLOW WINDS...Gusts up to 45 mph. These outflow winds can
travel up to 25 miles away from the thunderstorm that caused
it.
* ADDITIONAL INFORMATION...Some storms could be dry with gusty
outflows. Any overnight storms are more likely to produce
significantly less precipitation, or be completely dry.
* DETAILED URL...View the hazard area in detail at
https://www.wrh.noaa.gov/map/?wfo=mfr
