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Northern Lights Could Be Visible From 10 States Overnight Tuesday

NOAA forecasts a G1 geomagnetic storm overnight on July 21-22, with aurora most likely on the northern horizon in U.S. states close to the Canada border.

Forbes 3 min read 5/10
Northern Lights Could Be Visible From 10 States Overnight Tuesday
Key Takeaways
  • NOAA issued a G1 geomagnetic storm forecast on July 20, 2026, for the night of July 21–22, affecting 10 U.S. states.
  • The 10 states expected to see aurora from the northern horizon are Montana, North Dakota, Minnesota, Wisconsin, Michigan, New York, Vermont, New Hampshire, Maine, and Washington.
  • Optimal viewing time is 10 p.m. to 2 a.m. local time, with the auroral oval predicted to dip into the northern contiguous U.S.
  • G1 storms are the weakest on NOAA’s scale (Kp index of 5), yet they can produce visible green or reddish auroral arcs under clear skies.
  • This event is part of Solar Cycle 25, which is approaching its solar maximum in 2026–2027, promising more frequent geomagnetic storms in the coming months.
Skywatchers across 10 northern U.S. states should look up Tuesday night: a G1 geomagnetic storm is set to make the northern lights visible as far south as New York and Washington. The National Oceanic and Atmospheric Administration (NOAA) issued the forecast on July 20, predicting a minor but visually rewarding aurora display on the night of July 21–22. The northern lights visible tonight July 2026 event follows a coronal mass ejection from the sun, a reminder that the current solar cycle is nearing its peak. NOAA’s Space Weather Prediction Center (SWPC) in Boulder, Colorado, monitors such storms using the DSCOVR satellite, which measures solar wind speed and magnetic field strength. For a G1 storm, aurora typically appears along the northern horizon, often as green or faint red arcs. Key details: the 10 states are Montana, North Dakota, Minnesota, Wisconsin, Michigan, New York, Vermont, New Hampshire, Maine, and Washington. The best viewing window runs from 10 p.m. local time Tuesday through 2 a.m. Wednesday, with the auroral oval expected to dip just enough for southernmost states like New York to catch a glow. Clear skies are critical; cloud cover could obscure the display. NOAA’s OVATION model shows aurora probability above 40% in the northern tier. G1 storms are the weakest on NOAA’s five-level scale, but they can still produce noticeable auroral activity—enough to attract amateur photographers and dedicated chasers. Analysis: this forecast is part of Solar Cycle 25, which began in December 2019 and is now entering its maximum phase. The SWPC expects increasing solar activity through 2026–2027, meaning more frequent—and occasionally stronger—geomagnetic storms. While G1 events are common (about 2,000 days with G1 conditions per solar cycle), each one offers a chance for local communities, tourism boards, and science communicators to engage the public. Astronomer Dr. Angela Speck of the University of Missouri notes, “Even a minor storm like this can spark curiosity about space weather and the sun-Earth connection.” Outlook: if cloud cover interferes Tuesday night, another opportunity may arise within days as the solar active region continues to rotate toward Earth. The SWPC updates forecasts every 30 minutes; enthusiasts can monitor real-time aurora maps on the agency’s website. For now, the northern lights visible tonight July 2026 forecast gives millions of Americans a rare midweek reason to step outside and look north. But as solar activity climbs, the question isn’t if the next display will come—it’s how many states will be lucky enough to see it.

Frequently Asked Questions

A G1 geomagnetic storm is the mildest category on NOAA's five-level space weather scale, with a Kp index of 5. It can cause minor power grid fluctuations, affect satellite operations, and produce aurora visible from high latitudes, sometimes dipping into northern U.S. states.

NOAA forecasts aurora visible from 10 states: Montana, North Dakota, Minnesota, Wisconsin, Michigan, New York, Vermont, New Hampshire, Maine, and Washington. The aurora will appear on the northern horizon.

The optimal viewing window is between 10 p.m. local time on July 21 and 2 a.m. on July 22. The auroral oval is expected to be most active during that period.

Use a tripod to keep the phone steady, set a long exposure (3–10 seconds) if available, and turn off flash. Apps like Night Mode or ProCamera help. Focus on the northern horizon, away from city lights.

Possibly, if the current solar active region continues to emit coronal mass ejections. NOAA updates forecasts every 30 minutes. Check the SWPC website or aurora apps for real-time predictions.

Original source

www.forbes.com

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