The NOAA Space Weather Prediction Center has observed extreme (G5)
geomagnetic conditions Saturday morning 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 Saturday morning 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 Saturday morning 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 this morning 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 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 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...Sub-freezing temperatures as low as 31 expected.
* WHERE...In California, portions of central and western Siskiyou
County, including the Shasta and Scott Valleys. In Oregon,
portions of Josephine and Jackson Counties, including the Illinois
and Applegate Valleys and the outskirts of Jackson County.
* WHEN...Until 10 AM PDT this morning.
* IMPACTS...Frost and freeze conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing. Pets and animals may need to be sheltered.
* 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...Sub-freezing temperatures as low as 31 expected.
* WHERE...In California, portions of central and western Siskiyou
County, including the Shasta and Scott Valleys. In Oregon,
portions of Josephine and Jackson Counties, including the Illinois
and Applegate Valleys and the outskirts of Jackson County.
* WHEN...From 2 AM to 10 AM PDT Wednesday.
* IMPACTS...Frost and freeze conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing. Pets and animals may need to be sheltered.
* 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 2
to 5 inches. Winds gusting as high as 40 mph.
* WHERE...East Slopes of the Oregon Cascades.
* WHEN...Until 5 AM PDT Tuesday.
* IMPACTS...Travel could be very difficult.
* ADDITIONAL DETAILS...Snow showers will continue through the
evening hours with brief heavy snow at times.
* 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.
At 242 PM PDT, Doppler radar was tracking a strong thunderstorm near
Helix, or 17 miles north of Pendleton, moving northeast at 20 mph.
HAZARD...Pea size hail.
SOURCE...Radar indicated.
IMPACT...Minor hail damage to vegetation is possible.
Locations impacted include...
Helix and Umapine.
* WHAT...Snow above 4000 feet. Additional snow accumulations of
2 to 10 inches. Winds gusting as high as 35 mph.
* WHERE...West Slopes of the Northern and Central Oregon
Cascades.
* WHEN...Until 8 AM PDT Tuesday.
* IMPACTS...Travel could be very difficult. Patchy blowing snow
could significantly reduce visibility.
* ADDITIONAL DETAILS...Snow will be showery in nature with highest
accumulations above 5000 feet along the volcanos.
* 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 7 inches mainly impacting the crest of the Cascades and pass
areas. Winds gusting as high as 45 mph.
* WHERE...East Slopes of the Oregon Cascades.
* WHEN...Until 11 PM PDT this evening.
* IMPACTS...Travel could be very difficult.
* ADDITIONAL DETAILS...Snow showers will continue through the
evening hours with brief heavy snow at times.
* WHAT...West winds 20 to 30 mph with gusts up to 45 mph expected.
* WHERE...Central and Eastern Lake County. Includes the communities
of Silver Lake, Alkali Lake, and Christmas Valley. Affected
roadways include Highway 31 near Silver Lake and Highway 395 near
Alkali Lake.
* WHEN...From 11 AM this morning to 8 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 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 above 4500 feet. Additional snow accumulations of 4
to 8 inches mainly impacting along the crest of the Cascades
and pass areas. Winds gusting as high as 45 mph.
* WHERE...East Slopes of the Oregon Cascades.
* WHEN...Until 11 PM PDT this evening.
* IMPACTS...Travel could be very difficult to impossible. 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.
