The NOAA Space Weather Prediction Center has observed extreme (G5)
geomagnetic conditions Friday afternoon and expect severe (G4)
conditions to continue through the weekend.
* A Geomagnetic Storm of this strength can cause multiple and
widespread issues with various power and communication systems.
* Widespread voltage control problems may occur; some power grid
systems may experience component failures, disruption of service
and protective device trips. This could result in blackouts.
* Pipeline currents can reach hundreds of amps.
* GPS and other satellite navigation may be degraded or
unavailable for days.
* High Frequency (HF) radio propagation may be impossible in many
areas for one or two days.
* Low-frequency radio navigation can be out for hours.
* Aurora may be visible at much lower latitudes.
For Space Weather Information visit...www.swpc.noaa.gov
For Weather Information visit...www.weather.gov
The NOAA Space Weather Prediction Center has observed extreme (G5)
geomagnetic conditions Friday afternoon and expects severe (G4)
conditions to continue through the weekend.
A geomagnetic storm of this strength can cause multiple and and
widespread issues with various power and communications systems.
Widespread voltage control problems may occur, and some power
grid systems may experience component failures, disruption of
service, and protective device trips. This could result in
blackouts.
GPS and other satellite navigation may be degraded for days.
HF/VHF/UHF radio propagation may be impossible in many areas for
one to two days.
Low-frequency radio navigation can be out for hours.
Aurora may be visible at much lower latitudes.
For space weather information...visit www.swpc.noaa.gov
For weather information...visit www.weather.gov
The NOAA Space Weather Prediction Center has observed extreme (G5)
geomagnetic conditions Friday afternoon and expect severe (G4)
conditions to continue through the weekend.
* A Geomagnetic Storm of this strength can cause multiple and
widespread issues with various power and communication systems.
* Widespread voltage control problems my occur; some power grid
systems may experience component failures, disruption of service
and protective device trips. This could result in blackouts.
* Pipeline currents can reach hundreds of amps.
* GPS and other satellite navigation may be degraded or
unavailable for days.
* High Frequency (HF) radio propagation may be impossible in many
areas for one or two days.
* Low-frequency radio navigation can be out for hours.
* Aurora may be visible at much lower latitudes.
For Space Weather Information visit...www.swpc.noaa.gov
For Weather Information visit...www.weather.gov
* WHAT...Northwest winds 25 to 35 mph with gusts up to 45 mph.
* WHERE...Kittitas Valley.
* WHEN...Until 11 PM PDT this evening.
* IMPACTS...Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.
* WHAT...Temperatures as cold as the lower to mid 30s will
result in frost formation.
* WHERE...Central Willamette Valley, South Willamette Valley,
Western Foothills of the Northern and Central Oregon Cascades,
North and Central Coast Range Valleys of Oregon, Tualatin
Valley, Upper Hood River Valley, North Clark County Lowlands,
and South Washington Cascade Foothills.
* WHEN...From midnight tonight to 8 AM PDT Wednesday.
* IMPACTS...Frost could kill sensitive outdoor vegetation if
left uncovered.
* ADDITIONAL DETAILS...Frost will be most likely for outlying
valley locations, away from urban areas. Patchy frost may
affect suburban areas as well.
* WHAT...Northwest winds 25 to 35 mph with gusts up to 50 mph
expected.
* WHERE...Kittitas Valley.
* WHEN...Until 11 PM PDT this evening.
* IMPACTS...Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.
* WHAT...Snow above 4500 feet. Additional snow accumulations of
up to 3 inches.
* WHERE...In Oregon, Northern Blue Mountains of Oregon and East
Slopes of the Oregon Cascades. In Washington, Northwest Blue
Mountains.
* WHEN...Until noon PDT today.
* IMPACTS...Plan on slippery road conditions. The hazardous
conditions could impact the morning commute.
* WHAT...Temperatures as cold as the lower to mid 30s will result
in frost formation.
* WHERE...Central Willamette Valley, South Willamette Valley,
Western Foothills of the Northern and Central Oregon Cascades,
North and Central Coast Range Valleys of Oregon, Tualatin
Valley, Upper Hood River Valley, North Clark County Lowlands,
and South Washington Cascade Foothills.
* WHEN...From midnight tonight to 8 AM PDT Wednesday.
* IMPACTS...Frost could kill sensitive outdoor vegetation if
left uncovered.
* ADDITIONAL DETAILS...Frost will be most likely for outlying
valley locations, away from urban areas. Patchy frost may affect
suburban areas as well.
* WHAT...Snow above 4500 feet. Additional snow accumulations of 3
to 5 inches. Winds gusting as high as 40 mph.
* WHERE...In Oregon, Northern Blue Mountains of Oregon. In
Washington, Northwest Blue Mountains.
* WHEN...Until 5 AM PDT Tuesday.
* IMPACTS...Plan on slippery road conditions. Gusty winds could
bring down tree branches.
* ADDITIONAL DETAILS...Snow showers will continue through the
evening hours with heavy snow at times.
* WHAT...Northwest winds 25 to 35 mph with gusts up to 50 mph
expected.
* WHERE...Kittitas Valley.
* WHEN...From 8 AM to 11 PM PDT Tuesday.
* IMPACTS...Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.
At 245 PM PDT, Doppler radar was tracking a strong thunderstorm 7
miles north of Pasco, moving northeast at 35 mph.
HAZARD...Pea size hail.
SOURCE...Radar indicated.
IMPACT...Minor hail damage to vegetation is possible.
Locations impacted include...
Pasco and Eltopia.
* WHAT...Snow above 4500 feet. Additional snow accumulations of 2
to 5 inches. Winds gusting as high as 45 mph.
* WHERE...In Oregon, Northern Blue Mountains of Oregon. In
Washington, Northwest Blue Mountains.
* WHEN...Until 5 AM PDT Tuesday.
* IMPACTS...Plan on slippery road conditions. Gusty winds could
bring down tree branches.
* ADDITIONAL DETAILS...Snow showers will continue through the
evening hours with heavy snow at times.
* WHAT...Snow above 4500 feet. Additional snow accumulations of 3
to 8 inches, highest above 5000 feet. Winds gusting as high as
45 mph.
* WHERE...In Oregon, Northern Blue Mountains of Oregon. In
Washington, Northwest Blue Mountains.
* WHEN...Until 5 AM PDT Tuesday.
* IMPACTS...Plan on slippery road conditions. The hazardous
conditions could impact the morning or evening commute. Gusty
winds could bring down tree branches.
* ADDITIONAL DETAILS...Snow showers will develop through the day
peaking in the afternoon through evening hours with brief
intense snowfall at times.
* WHAT...Snow expected above 4500 feet. Total snow accumulations
of 4 to 10 inches, highest above 5000 feet.
* WHERE...In Oregon, Northern Blue Mountains of Oregon. In
Washington, Northwest Blue Mountains.
* WHEN...Until 5 AM PDT Tuesday.
* IMPACTS...Plan on slippery road conditions.
* ADDITIONAL DETAILS...Snowfall will become showery in nature
Monday with little accumulation Monday afternoon as temperatures
warm above freezing. Additional accumulating snowfall is
anticipated starting Monday night as temperatures drop back
below freezing. Accumulations of less than 4 inches are expected
below 4500 feet.
* WHAT...Snow expected above 4500 feet. Total snow accumulations
of 4 to 10 inches, highest above 5000 feet.
* WHERE...In Oregon, Northern Blue Mountains of Oregon. In
Washington, Northwest Blue Mountains.
* WHEN...Until 5 AM PDT Tuesday.
* IMPACTS...Plan on slippery road conditions.
* ADDITIONAL DETAILS...Snowfall will become showery in nature
Monday with little accumulation Monday afternoon as temperatures
warm above freezing. Additional snowfall is anticipated into
Monday night as temperatures drop back below freezing.
Accumulations of less than 4 inches are expected below 4500
feet.
* WHAT...Northwest winds 25 to 35 mph with gusts 40 to 55 mph.
* WHERE...Kittitas Valley.
* WHEN...Until 11 PM PDT this evening.
* IMPACTS...Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.
* WHAT...West winds 25 to 35 mph with gusts 40 to 50 mph.
* WHERE...Eastern Columbia River Gorge of Oregon and Washington,
Foothills of the Blue Mountains of Oregon, Lower Columbia Basin of
Oregon, North Central Oregon, and Simcoe Highlands.
* WHEN...Until 11 PM PDT this evening.
* IMPACTS...Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.
* WHAT...Northwest winds 30 to 35 mph with gusts 45 to 55 mph.
* WHERE...Kittitas Valley.
* WHEN...Until 11 PM PDT this evening.
* IMPACTS...Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.
* WHAT...West winds 25 to 35 mph with gusts 45 to 50 mph.
* WHERE...Eastern Columbia River Gorge of Oregon and Washington,
Foothills of the Blue Mountains of Oregon, Lower Columbia Basin of
Oregon, North Central Oregon, and Simcoe Highlands.
* WHEN...Until 11 PM PDT this evening.
* IMPACTS...Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.
* WHAT...West winds 25 to 35 mph with gusts up to 50 mph expected.
* WHERE...Eastern Columbia River Gorge of Oregon and Washington,
Foothills of the Blue Mountains of Oregon, Lower Columbia Basin of
Oregon, North Central Oregon, and Simcoe Highlands.
* WHEN...From 2 AM to 11 PM PDT Sunday.
* IMPACTS...Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.
