Special Weather Statement issued May 11 at 5:11AM PDT by NWS Pendleton OR
Modéré
Maintenant
De Aujourd'hui 05:11 (il y a 7 heures)
Jusqu'à Aujourd'hui 17:00 (dans 3 heures)
Explications officielles de l'avertissement:

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,https://www.swpc.noaa.gov For Weather Information visit,https://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

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