The Aurora Borealis was visible across several U.S. states last night, including parts of Pennsylvania, and similar solar activity could produce another display tonight. NOAA has issued a Severe Magnetic Storm Alert, warning that geomagnetic storms can affect satellites, GPS and some communications. If skies clear, the best viewing window is roughly between 10 p.m. and 2 a.m. — and heading away from city lights will improve visibility, though clouds may hinder sightings.
Northern Lights May Return to Pennsylvania Tonight — NOAA Issues Severe Magnetic Storm Alert
The Aurora Borealis was visible across several U.S. states last night, including parts of Pennsylvania, and similar solar activity could produce another display tonight. NOAA has issued a Severe Magnetic Storm Alert, warning that geomagnetic storms can affect satellites, GPS and some communications. If skies clear, the best viewing window is roughly between 10 p.m. and 2 a.m. — and heading away from city lights will improve visibility, though clouds may hinder sightings.
12:45 AM, 11/13/2025Science
Northern Lights May Return to Pennsylvania Tonight
The Aurora Borealis — commonly called the northern lights — was visible across several U.S. states last night, including parts of Pennsylvania. Forecasters say the same solar activity could produce another display tonight.
What causes the aurora: Colorful bands and swirls appear when charged particles from the sun interact with Earth’s magnetic field and upper atmosphere. Because the sun is near the peak of its roughly 11-year activity cycle, auroras have been observed farther south than usual — in some cases as far as Florida.
Technology and safety impacts: The National Oceanic and Atmospheric Administration (NOAA) has issued a Severe Magnetic Storm Alert. Strong geomagnetic storms can affect satellites, GPS, radio communications and other technology. Monitor official NOAA updates if you rely on satellite services or critical communications.
Viewing tips: NOAA publishes suggestions on its website for getting the best view. If skies clear, the prime viewing window is generally between 10 p.m. and 2 a.m. For the best chance, go to a dark location away from city lights to reduce light pollution. Keep in mind that cloud cover could block the display — AccuWeather warns that “clouds will be problematic for some skywatchers.”
Where you'll see them most easily: Sightings are typically easier farther north and at higher latitudes, but the current solar activity has pushed auroras well south in recent nights. Before heading out, check local cloud forecasts and NOAA aurora alerts to decide whether it's worth the trip.
Read the original report on pennlive.com for more local details.