A geomagnetic storm began Monday night across the Northern Hemisphere, but whether Chicago would get a glimpse of the Northern Lights remained to be seen.
A Coronal Mass Ejection was emitted from the sun over the weekend and arrived at Earth at approximately 5 p.m. Monday, according to the NOAA Space Weather Prediction Center. The occurrence was expected, meaning much of the globe was still on track to see the Northern Lights, also known as aurora borealis.
But it’s not a guarantee.
When it comes to the Northern Lights, NBC 5 Storm Team Meteorologist Kevin Jeanes said it’s important to remember a few things:
These forecast are challenging and not perfect Manage your expectations. Images you see on social media are often more vivid and brighter than what you see with your eyes. Your phone will actually capture it better than your eyes!With the arrival of the CME, a moderate geomagnetic storm commenced Monday evening across the Northern Hemisphere and was expected to strengthen, upping the chances of seeing a spectacle of lights.
The peak is expected to be a G3, or “strong” storm between 1 a.m. and 4 a.m., with a slight chance it reaches the G4, “severe” level, which ranks as level 4 of 5. A geomagnetic storm watch remains in effect into early Tuesday.
The CME arrived near 4:30pm EDT on 1 Sep, 2025, at the L1 orbital point – 1 million miles from Earth. It arrived at Earth very near 5:00pm EDT as noted by the GOES satellites’ magnetometers. Warnings will be issued as appropriate – so stay informed at t.co/TV7Yw6LXRw pic.twitter.com/9uHa56aOIt
— NOAA Space Weather Prediction Center (@NWSSWPC) September 1, 2025Timing is difficult to forecast. But thankfully for us, we should have mostly clear skies around Chicago the entire night.
We have been surprised by a few major geomagnetic storms over the past year and a half as we’ve been in the peak of an 11-year solar cycle. However, solar activity is expected to be on the way down from that peak.
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