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Special Weather Statement
National Weather Service Portland OR
557 PM PDT Fri May 10 2024

ORZ101>128-WAZ201>211-110700-
Clatsop 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-
Portland West Hills and Chehalem Mountain-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 Corridor-
Central Columbia River Gorge SR 14 Corridor-
South Washington Cascades-
Including the cities of Astoria, Warrenton, Seaside,
Cannon Beach, Manzanita, Rockaway Beach, Tillamook, Pacific City,
Neskowin, Lincoln City, Newport, Waldport, Florence, Vernonia,
Jewell, Glenwood, Necanicum, Knappa,
Grand Ronde Indian Reservation, Mapleton, Alma, Alsea, Hoskins,
Grand Ronde, Sunset Summit, Wilson River Summit, Valsetz, Horton,
Mary`s Peak, Scappoose, St. Helens, Rainier, Clatskanie,
Sherwood, Hillsboro, Forest Grove, Rockcreek, Tigard,
Sylvan Hill, Skyline Drive, Chehalem Mountain, Portland,
Sellwood, Happy Valley, Lake Oswego, Oregon City, Eagle Creek,
Fairview, Gresham, Troutdale, Boring, Sandy, Estacada,
McMinnville, Newberg, Sheridan, Dallas, Monmouth, Salem, Keizer,
Woodburn, Wilsonville, Molalla, Stayton, Silverton, Corvallis,
Philomath, Monroe, Albany, Lebanon, Brownsville, Harrisburg,
Eugene, Springfield, Junction City, Creswell, Cottage Grove,
Corbett, Rooster Rock, Multnomah Falls, Bonneville,
Cascade Locks, Odell, Parkdale, Hood River, Wyeth, Cherryville,
Brightwood, Rhododendron, Welches, Detroit, Silver Falls,
Mill City, McKenzie Bridge, Vida, Oakridge, Government Camp,
Timothy Lake, Bennett Pass, Lost Lake, Santiam Pass,
Tombstone Summit, McKenzie Pass, Santiam Junction,
Breitenbush Springs, Willamette Pass, Waldo Lake, Raymond,
Tokeland, Ocean Park, Long Beach, Naselle, Cathlamet, Rosburg,
Lebam, Willapa, Brooklyn, Kelso, Longview, Castle Rock, Kalama,
Woodland, Ridgefield, Battle Ground, Hockinson, Brush Prairie,
La Center, Vancouver, Salmon Creek, Evergreen, Camas, Washougal,
Yacolt, Amboy, Lake Merwin, Toutle, Cape Horn, Beacon Rock SP,
North Bonneville, Stevenson, Carson, Underwood, Mt. St. Helens,
Larch Mountain, and Indian Heaven Wilderness
557 PM PDT Fri May 10 2024

...EXTREME GEOMAGNETIC CONDITIONS OBSERVED AND CONTINUED SEVERE
GEOMAGNETIC STORM EXPECTED TO CONTINUE THROUGH THE WEEKEND...

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


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