Special Weather Statement
Special Weather Statement issued May 10 at 6:03PM PDT by NWS Seattle WA
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
Read Full AlertSan Juan County; Western Whatcom County; Southwest Interior; Western Skagit County; Everett and Vicinity; Tacoma Area; Admiralty Inlet Area; Hood Canal Area; Lower Chehalis Valley Area; Olympics; Eastern Strait of Juan de Fuca; Western Strait of Juan De Fuca; North Coast; Central Coast; East Puget Sound Lowlands; Bellevue and Vicinity; Seattle and Vicinity; Bremerton and Vicinity; West Slopes North Cascades and Passes; West Slopes North Central Cascades and Passes; West Slopes South Central Cascades and Passes
Moderate
Observed
Expected
May 10th, 2024 06:03:00 pm PDT
May 10th, 2024 06:03:00 pm PDT
May 11th, 2024 12:00:00 am PDT
Special Weather Statement
Special Weather Statement issued May 10 at 5:57PM PDT by NWS Portland OR
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
Read Full AlertClatsop County Coast; Tillamook County Coast; Central Coast of Oregon; North Oregon Coast Range Lowlands; Central Oregon Coast Range Lowlands; North Oregon Coast Range; Central Oregon Coast Range; Lower Columbia River; Tualatin Valley; West Hills and Chehalem Mountains; Inner Portland Metro; East Portland Metro; Outer Southeast Portland Metro; West Central Willamette Valley; East Central Willamette Valley; Benton County Lowlands; Linn County Lowlands; Lane County Lowlands; West Columbia River Gorge of Oregon above 500 ft; West Columbia River Gorge I-84 Corridor; Upper Hood River Valley; Central Columbia River Gorge I-84 Corridor; Clackamas County Cascade Foothills; Cascade Foothills of Marion and Linn Counties; Lane County Cascade Foothills; North Oregon Cascades; Cascades of Marion and Linn Counties; Cascades of Lane County; South Washington Coast; Willapa and Wahkiakum Lowlands; Willapa Hills; Cowlitz County Lowlands; North Clark County Lowlands; Inner Vancouver Metro; East Clark County Lowlands; South Washington Cascade Foothills; West Columbia River Gorge - SR 14; Central Columbia River Gorge - SR 14; South Washington Cascades
Moderate
Observed
Expected
May 10th, 2024 05:57:00 pm PDT
May 10th, 2024 05:57:00 pm PDT
May 11th, 2024 12:00:00 am PDT
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