G1 – Minor Geomagnetic Storm Watch issued for March 30, 2026

A G1 – Minor Geomagnetic Storm Watch was issued for March 30, 2026. According to the latest official update from NOAA SWPC, isolated periods of G1 – Minor geomagnetic storming are likely on March 30, 2026, due to effects from a coronal hole high speed stream (CH HSS). This Watch supersedes any previous watches in effect.

Potential impacts from this event are expected primarily poleward of 60 degrees geomagnetic latitude. Weak power grid fluctuations may occur due to induced currents. Minor impact on satellite operations is also possible. Auroral activity may be visible at high latitudes, including the northern tier of the U.S. such as northern Michigan and Maine.

NOAA forecasters attribute the elevated geomagnetic storm risk to anticipated enhancements from recurrent, positive polarity coronal hole high speed stream influences. The geomagnetic field is expected to become unsettled to active by late March 29 and into March 30 in response to these solar wind changes.