‘Severe’ Northern Lights Alert For 23 States On Thursday And Friday

A 'severe' northern lights alert for 23 states this week is actually more of a gentle invitation. The National Oceanic and Atmospheric Administration (NOAA) forecasts a G1 geomagnetic storm overnight on Thursday, June 4, through Friday, June 5, 2026 — the mildest category on the space weather scale but enough to push the aurora borealis into view for millions across the northern United States and Canada.

The alert covers a belt from Washington and Oregon through the Great Lakes to New England, including states like Montana, North Dakota, Minnesota, Wisconsin, Michigan, and Maine. While G1 storms rarely produce the dazzling displays seen during stronger events, they can still paint the sky with faint green or red curtains, especially in rural areas with dark skies. The key is timing: peak activity is expected between 10 p.m. local time Thursday and 2 a.m. Friday, with a secondary window just before dawn.

Geomagnetic storms occur when the solar wind — a stream of charged particles from the sun — interacts with Earth's magnetic field. The G1 threshold is triggered by a minor coronal mass ejection (CME) that arrived at Earth on Wednesday. NOAA's Space Weather Prediction Center issued the alert on June 3, giving skywatchers a short but actionable heads-up. This is the first significant aurora alert of June 2026, following a spring that saw only sporadic activity.

The 23 states named in the forecast span the northern tier, but the aurora could dip slightly farther south if the storm intensifies unexpectedly. Forecasters emphasize that cloud cover, light pollution, and moon phase (a waxing gibbous will set around midnight) all affect visibility. For best results, head away from city lights, find a north-facing horizon, and let your eyes adjust for 20 minutes.

Why does a G1 storm warrant an alert? The northern lights alert system helps utilities, satellite operators, and even amateur radio enthusiasts prepare for minor disruptions. G1 storms can cause weak power grid fluctuations and minor impacts on satellite operations — but for most people, the only effect is a chance to witness the aurora without traveling to the Arctic. The alert's 'severe' label in some headlines reflects the media's tendency to overhype, not the actual threat.

Looking ahead, solar activity is ramping up as we approach the solar maximum of Solar Cycle 25, expected in 2025–2026. That means more frequent and potentially stronger geomagnetic storms throughout the summer and into 2027. For now, this northern lights alert is a low-stakes preview: a colorful reminder that the sun is waking up, and the best aurora shows could still be to come.