G3 – Strong Geomagnetic Storm Watch issued for June 8, 2026

A G3 – Strong Geomagnetic Storm Watch was issued for June 8, 2026. The Watch, announced by NOAA’s Space Weather Prediction Center on June 6, 2026, supersedes all previously issued watches. According to the alert, no significant geomagnetic activity is expected on June 7, while G3 – Strong storm levels are predicted on June 8, and G2 – Moderate conditions on June 9.

G3 – Strong Geomagnetic Storms may result in intermittent impacts to satellite operations and power systems at higher latitudes. The Watch indicates that there is a potential for auroras to be visible at lower latitudes than usual. Users of high-frequency radio communications and satellite-based navigation systems may experience degraded performance during the period specified.

SWPC’s latest forecast discussion confirms the predicted storm activity is associated with lingering influences from previous CME (coronal mass ejection) events. Solar wind conditions reflect multiple CME arrivals from earlier June 3 events, resulting in strong variations in the interplanetary magnetic field and elevated solar wind speeds that have recently impacted geomagnetic conditions. No new Earth-directed CME activity has been identified in recent solar observations.