G2 – Moderate Geomagnetic Storm Watch issued for March 31, 2026

A G2 – Moderate Geomagnetic Storm Watch was issued for March 31, 2026, by NOAA’s Space Weather Prediction Center. The Watch is based on current forecasts indicating a G1 – Minor geomagnetic storm on March 30 and April 1, with the strongest activity—a G2 – Moderate event—expected on March 31, 2026. This advisory supersedes all prior watches in effect.

Potential impacts from this geomagnetic storm are expected mainly for areas poleward of 55 degrees geomagnetic latitude. Power grid fluctuations may occur, and high-latitude power systems could experience voltage alarms. Spacecraft may encounter orientation irregularities and increased drag, particularly for low Earth-orbit satellites. High frequency (HF) radio propagation could be degraded at higher latitudes, and auroras may become visible as far south as New York, Wisconsin, and Washington state.

This G2 – Moderate Geomagnetic Storm Watch is triggered by enhancements in the solar wind caused by corotating interaction regions (CIR) and high-speed solar wind streams (HSS) expected to impact Earth on March 30 and continue through March 31, 2026. No Earth-directed coronal mass ejections (CMEs) were observed in recent solar activity.