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WWUS86 KOTX 111212
SPSOTX

Special Weather Statement
National Weather Service Spokane WA
512 AM PDT Sat May 11 2024

IDZ001>004-026-027-WAZ031>038-041-043-044-047>049-120000-
Northern Panhandle-Coeur d`Alene Area-Idaho Palouse-
Central Panhandle Mountains-Lewiston Area-
Lewis and Southern Nez Perce Counties-Northeast Blue Mountains-
Lower Garfield and Asotin Counties-Washington Palouse-
Moses Lake Area-Upper Columbia Basin-Spokane Area-
Northeast Mountains-Okanogan Highlands-Wenatchee Area-
Okanogan Valley-Waterville Plateau-Central Chelan County-
Western Chelan County-Western Okanogan County-
512 AM PDT Sat May 11 2024

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

The NOAA Space Weather Prediction Center has observed extreme (G5)
geomagnetic conditions early Saturday morning and expects 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

$$