SVRBOI
The National Weather Service in Boise has issued a
* Severe Thunderstorm Warning for...
North central Malheur County in southeastern Oregon...
* Until 230 PM PDT.
* At 150 PM PDT, a severe thunderstorm was located over Ironside, or
31 miles south of Baker City, moving southeast at 5 mph.
HAZARD...Quarter size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is expected.
* This severe thunderstorm will remain over mainly rural areas of
north central Malheur County.
At 146 PM PDT, Doppler radar was tracking a strong thunderstorm over
Ironside, or 31 miles south of Baker City, moving southeast at 5 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
visibility. Minor damage to outdoor objects is possible.
This storm will remain over mainly rural areas of north central
Malheur County.
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of Idaho, including the following areas, Boise
Mountains, Camas Prairie, Lower Treasure Valley, Owyhee Mountains,
Southern Twin Falls County, Southwest Highlands, Upper Treasure
Valley, Upper Weiser River, West Central Mountains and Western
Magic Valley and southeast Oregon, including the following area,
Oregon Lower Treasure Valley.
* WHEN...Until midnight MDT /11 PM PDT/ tonight.
* IMPACTS...Heavy rainfall could trigger flash flooding or debris
flows in and near recent wildfire burn scars.
* ADDITIONAL DETAILS...
- https://www.weather.gov/safety/flood
...RED FLAG WARNING IN EFFECT THROUGH THIS EVENING FOR OUTFLOW
WINDS AND HIGH INSTABILITY...
* AFFECTED AREA...In Oregon, Fire Weather Zone 689 Northern
Willamette National Forest and Fire Weather Zone 690 Southern
Willamette National Forest.
* THUNDERSTORMS...Isolated to scattered thunderstorms. 15-25%
chance of thunderstorms through this evening. 5% chance for
wetting rains with passing thunderstorms.
* UNSTABLE...High instability with elevated mixing heights may
promote pyroconvective activity.
* OUTFLOW WINDS...Instantaneous gusts as high as 40 mph. Gusts at
these speeds can be observed tens of miles away from the core of
the thunderstorm.
* IMPACTS...Conditions may be favorable for rapid fire spread
which may threaten life and property. Thunderstorm outflow
winds may result in unanticipated erratic fire spread. High
instability may result in fire growth. Frequent lightning and
critically dry fuels may result in fire starts.
...RED FLAG WARNING IN EFFECT THROUGH THIS EVENING FOR OUTFLOW
WINDS AND HIGH INSTABILITY...
* 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.
* THUNDERSTORMS...Isolated to scattered thunderstorms. 20-30%
chance of thunderstorms through this evening. 10-15% chance for
wetting rains with passing thunderstorms.
* UNSTABLE...High instability with elevated mixing heights may
promote pyroconvective activity.
* OUTFLOW WINDS...Instantaneous gusts as high as 40 mph. Gusts at
these speeds can be observed tens of miles away from the core of
the thunderstorm.
* IMPACTS...Conditions may be favorable for rapid fire spread
which may threaten life and property. Thunderstorm outflow
winds may result in unanticipated erratic fire spread. High
instability may result in fire growth. Frequent lightning and
critically dry fuels may result in fire starts.
* IMPACTS...Abundant lightning on dry fuels resulting in the
potential for numerous new fire starts.
* AFFECTED AREA...In California, Fire weather zones 281, 284,
and 285, and in Oregon, Fire weather zones 617, 623, 624, and
625.
* THUNDERSTORMS...Scattered thunderstorms with abundant
lightning expected. Storms are likely to be wet, but lightning
strikes outside of precipitation cores are possible, and may
cause many new fire starts.
* OUTFLOW WINDS...Gusts of 35 to 50 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
...RED FLAG WARNING IN EFFECT THROUGH THIS EVENING FOR DRY AND
UNSTABLE CONDITIONS, AND THUNDERSTORMS...
.Low pressure in the area is increasing instability and producing
thunderstorms within the area. Instability will be highest within
the Lane and Linn County Cascades. High probability for
pyrocumulus development. Outflow winds from thunderstorms may
cause rapid fire spread.
* AFFECTED AREA...In Oregon, Fire Weather Zone 689 Northern
Willamette National Forest and Fire Weather Zone 690 Southern
Willamette National Forest.
* THUNDERSTORMS...Isolated to scattered thunderstorms. 20-30%
chance of thunderstorms today. 5-10% chance for wetting rains
with passing thunderstorms.
* UNSTABLE...High instability with elevated mixing heights may
promote pyroconvective activity.
* OUTFLOW WINDS...Instantaneous gusts as high as 40 mph. Gusts at
these speeds can be observed tens of miles away from the core of
the thunderstorm.
* IMPACTS...Conditions may be favorable for rapid fire spread
which may threaten life and property. Thunderstorm outflow
winds may result in unanticipated erratic fire spread. High
instability may result in fire growth. Frequent lightning and
critically dry fuels may result in fire starts.
...RED FLAG WARNING IN EFFECT THROUGH THIS EVENING FOR DRY AND
UNSTABLE CONDITIONS, AND THUNDERSTORMS...
.Low pressure in the area is increasing instability and producing
thunderstorms within the area. Instability will be highest within
the Lane and Linn County Cascades. High probability for
pyrocumulus development. Outflow winds from thunderstorms may
cause rapid fire spread.
* 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.
* THUNDERSTORMS...Isolated to scattered thunderstorms. 20-30%
chance of thunderstorms today. 10-15% chance for wetting rains
with passing thunderstorms.
* UNSTABLE...High instability with elevated mixing heights may
promote pyroconvective activity.
* OUTFLOW WINDS...Instantaneous gusts as high as 40 mph. Gusts at
these speeds can be observed tens of miles away from the core of
the thunderstorm.
* IMPACTS...Conditions may be favorable for rapid fire spread
which may threaten life and property. Thunderstorm outflow
winds may result in unanticipated erratic fire spread. High
instability may result in fire growth. Frequent lightning and
critically dry fuels may result in fire starts.
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of Idaho, including the following areas, Boise
Mountains, Camas Prairie, Lower Treasure Valley, Owyhee Mountains,
Southern Twin Falls County, Southwest Highlands, Upper Treasure
Valley, Upper Weiser River, West Central Mountains and Western
Magic Valley and Oregon, including the following areas, Baker
County, Malheur County and Oregon Lower Treasure Valley.
* WHEN...Through this evening.
* IMPACTS...Heavy rainfall could trigger flash flooding or debris
flows in and near recent wildfire burn scars.
* ADDITIONAL DETAILS...
- https://www.weather.gov/safety/flood
...RED FLAG WARNING IN EFFECT THROUGH THIS EVENING FOR DRY AND
UNSTABLE CONDITIONS, AND THUNDERSTORMS...
.Low pressure in the area is increasing instability and producing
thunderstorms within the area. Instability will be highest within
the Lane and Linn County Cascades. High probability for
pyrocumulus development. Within thunderstorms, outflow winds may
cause rapid fire spread.
* AFFECTED AREA...In Oregon, Fire Weather Zone 689 Northern
Willamette National Forest and Fire Weather Zone 690 Southern
Willamette National Forest.
* THUNDERSTORMS...Isolated to scattered thunderstorms. 15-25%
chance of thunderstorms after 1 PM.
* DRY AND UNSTABLE...Very unstable conditions with elevated
mixing heights may promote pyroconvective activity.
* OUTFLOW WINDS...Outflow wind gusts up to 35 mph.
* IMPACTS...Conditions may be favorable for rapid fire spread
which may threaten life and property. Thunderstorm outflow
winds may result in unanticipated erratic fire spread. High
instability may result in fire growth. Frequent lightning and
critically dry fuels may result in fire starts.
...RED FLAG WARNING IN EFFECT THROUGH THIS EVENING FOR DRY AND
UNSTABLE CONDITIONS, AND THUNDERSTORMS...
.Low pressure in the area is increasing instability and producing
thunderstorms within the area. Instability will be highest within
the Lane and Linn County Cascades. High probability for
pyrocumulus development. Within thunderstorms, outflow winds may
cause rapid fire spread.
The National Weather Service in Portland has issued a Red Flag
Warning for thunderstorms, which is in effect from 9 AM this
morning to 9 PM PDT this 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.
* THUNDERSTORMS...Isolated to scattered thunderstorms. 25-30%
chance of thunderstorms between 9 AM and 1 PM.
* DRY AND UNSTABLE...Unstable conditions with elevated mixing
heights may promote pyroconvective activity.
* OUTFLOW WINDS...Outflow wind gusts up to 35 mph.
* IMPACTS...Conditions may be favorable for rapid fire spread
which may threaten life and property. Thunderstorm outflow
winds may result in unanticipated erratic fire spread. High
instability may result in fire growth. Frequent lightning and
critically dry fuels may result in fire starts.
* IMPACTS...Thunderstorm outflow winds may result in erratic
fire spread. Frequent lightning and critically dry fuels may
result in numerous fire starts.
The National Weather Service in Portland has issued a Red Flag
Warning for thunderstorms and unstable conditions, which is in
effect from 9 AM to 9 PM PDT Wednesday.
* AFFECTED AREA...In Oregon, Fire Weather Zone 689 Northern
Willamette National Forest and Fire Weather Zone 690 Southern
Willamette National Forest.
* THUNDERSTORMS...Isolated to scattered thunderstorms.
* DRY AND UNSTABLE...Unstable conditions with elevated mixing
heights may promote pyroconvective activity.
* OUTFLOW WINDS...Instantaneous gusts as high as 40 mph. Gusts at
these speeds can be observed tens of miles away from the core of
the thunderstorm.
* IMPACTS...Conditions may be favorable for rapid fire spread
which may threaten life and property. Thunderstorm outflow winds
may result in unanticipated erratic fire spread. High
instability may result in fire growth. Frequent lightning and
critically dry fuels may result in fire starts.
At 750 PM PDT, Doppler radar was tracking a strong thunderstorm 7
miles north of Klamath River, or 16 miles south of Ashland, moving
northeast at 5 mph.
HAZARD...Winds in excess of 40 mph and penny size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Mount Ashland Snow Park, Grouse Gap Snow Park, and Hilt.
At 454 PM PDT, Doppler radar was tracking a strong thunderstorm over
Schroeder Park, or near Grants Pass, moving east-southeast at 5 mph.
HAZARD...Winds in excess of 30 mph and penny size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Grants Pass, Cathedral Hills Trails, Schroeder Park, Tom Pearce Park,
Merlin, Harbeck-Fruitdale, Redwood, and Whitehorse Park.
At 448 PM PDT, Doppler radar was tracking strong thunderstorms along
a line extending from 6 miles south of Antler Campground And
Trailhead to 7 miles west of Head Of The River Campground. Movement
was southeast at 25 mph.
HAZARD...Winds in excess of 30 mph and penny size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Head Of The River Campground and Sprague River.
* AFFECTED AREA...In Oregon, Fire Weather Zone 689 Northern
Willamette National Forest and Fire Weather Zone 690 Southern
Willamette National Forest.
* THUNDERSTORMS...Isolated to scattered thunderstorms. 20-30%
chance of thunderstorms. 10-20% chance of wetting rains in
passing storms.
* DRY AND UNSTABLE...Unstable conditions with elevated mixing
heights may promote pyroconvective activity.
* OUTFLOW WINDS...Instantaneous gusts as high as 40 mph. Gusts at
these speeds can be observed tens of miles away from the core of
the thunderstorm.
* IMPACTS...Conditions may be favorable for rapid fire spread
which may threaten life and property. Thunderstorm outflow winds
may result in unanticipated erratic fire spread. High
instability may result in fire growth. Frequent lightning and
critically dry fuels may result in fire starts.
The National Weather Service in Medford has issued a Red Flag
Warning, which is in effect from 1 PM to 9 PM PDT Wednesday.
* IMPACTS...Abundant lightning on dry fuels resulting in the
potential for numerous new fire starts.
* AFFECTED AREA...In California, Fire weather zones 281, 284, and
285, and in Oregon, Fire weather zones 617, 623, 624, and 625.
* THUNDERSTORMS...Scattered thunderstorms with abundant lightning
expected. Storms are likely to be wet, but lightning strikes
outside of precipitation cores are possible, and may cause many
new fire starts.
* OUTFLOW WINDS...Gusts of 35 to 50 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
The National Weather Service in Medford has issued a Red Flag
Warning, which is in effect from 1 PM to 9 PM PDT Wednesday.
* IMPACTS...Abundant lightning on dry fuels resulting in the
potential for numerous new fire starts.
* AFFECTED AREA...In California, Fire weather zones 281, 284, and
285, and in Oregon, Fire weather zones 617, 623, 624, and 625.
* THUNDERSTORMS...Scattered thunderstorms with abundant lightning
expected. Storms are likely to be wet, but lightning strikes
outside of precipitation cores are possible, and may cause many
new fire starts.
* OUTFLOW WINDS...Gusts of 35 to 50 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
* IMPACTS...Abundant lightning on dry fuels resulting in the
potential for numerous new fire starts.
* AFFECTED AREA...In California, Fire weather zones 280 and 282,
and in Oregon, Fire weather zones 620, 621, 622.
* THUNDERSTORMS...Scattered thunderstorms with abundant lightning
expected. Storms are likely to be wet, but lightning strikes
outside of precipitation cores are possible, and may cause many
new fire starts. Isolated thunderstorms are forecast for
Wednesday, but chances are lower than previous days.
* OUTFLOW WINDS...Gusts of 35 to 50 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
A surge of deep monsoonal moisture combined with a slow-moving
upper trough will bring periods of heavy showers and thunderstorms
across the region. This airmass contains anomalously high moisture
content, supporting the potential for excessive rainfall. Flash
flooding will be possible, especially in steep terrain, narrow
canyons, and near recent burn scars where soils are less able to
absorb rainfall. The greatest risk will be Tuesday afternoon through
Wednesday evening as repeated rounds of storms move through.
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Portions of Idaho, including the following areas, Boise
Mountains, Camas Prairie, Lower Treasure Valley, Owyhee Mountains,
Southern Twin Falls County, Southwest Highlands, Upper Treasure
Valley, Upper Weiser River, West Central Mountains and Western
Magic Valley and Oregon, including the following areas, Baker
County, Malheur County and Oregon Lower Treasure Valley.
* WHEN...Through Wednesday evening.
* IMPACTS...Heavy rainfall could trigger flash flooding or debris
flows, especially in and near recent wildfire burn scars.
* ADDITIONAL DETAILS...
- https://www.weather.gov/safety/flood
