A dynamic surge of solar wind is set to collide with Earth's magnetic field for a consecutive night, potentially gracing parts of the northern United States with the northern lights overnight from Saturday, October 31 (Halloween) into Sunday, November 1.

Space weather meteorologists have forecast a G1-class geomagnetic storm, raising prospects that the aurora borealis could become visible across northern tier states sharing a border with Canada. Under optimal viewing conditions, stargazers might even be able to capture the celestial display using a standard smartphone camera.

Adding to the weekend timeline, the moon hits its last quarter phase, rising around midnight on Sunday, November 1. This night also marks the end of Daylight Saving Time across the majority of the United States and Canada.

Aurora Forecast: Will You Witness the Northern Lights Tonight?

Data from the National Oceanic and Atmospheric Administration indicates that a G1-class geomagnetic storm could spark around 10 p.m. EDT on Saturday, October 31, projecting Kp 4.67 conditions, though exact arrival times remain notoriously challenging to pinpoint precisely.

G1 (Minor) geomagnetic storms are likely on 31 Oct and 01 Nov due to CH HSS influences. — NOAA

NOAA's forecast highlights a coronal hole high-speed stream—a forceful gust of charged particles escaping a darker corridor of the solar atmosphere at speeds exceeding one million miles per hour. When this high-speed solar wind impacts our planet, it disrupts the geomagnetic field and frequently pushes auroral visibility further south than typical boundaries.

Geographical Reach: Where the Aurora Might Appear

Should the G1 geomagnetic storm materialize as anticipated, the aurora could emerge from dark-sky locations spanning northern U.S. border states. Clear atmospheric conditions may afford views in Alaska, Washington, Idaho, Montana, North Dakota, South Dakota, Minnesota, Wisconsin, Michigan, Maine, Vermont, and New Hampshire.

For real-time probability metrics broken down by state and hundreds of cities, skywatchers often consult platforms like the tracking site Cosmik, which translates live NOAA metrics into localized viewing odds.

Maximizing Your Chances to Catch the Light Show

To optimize your viewing experience, travel away from urban light pollution to a dark vantage point offering an unobstructed view of the northern horizon. Success ultimately hinges on a combination of variables, including solar wind intensity, cloud coverage, local illumination, and the orientation of the interplanetary magnetic field, known as Bz.

The Bz orientation plays a critical role; when it points southward, it merges more efficiently with Earth's magnetic shield, permitting a heavier influx of charged particles into the magnetosphere. A sustained southern Bz can intensify the aurora and drive it deeper into southern latitudes, whereas a northward Bz typically confines the phenomenon to higher latitudes with much dimmer results.

Enthusiasts can leverage dedicated tracking applications such as Aurora Now, My Aurora Forecast, or Glendale Aurora to monitor live solar wind streams and receive instantaneous alert notifications.