Heads up aurora chasers! The northern lights could put on a show across the U.S. tonight and tomorrow as a coronal mass ejection (CME) is forecast to hit Earth, according to the National Oceanic and Atmospheric Administration’s (NOAA) Space Weather Prediction Center.

The full-halo CME was released during an M8.1 solar flare on Dec. 6, and is expected to impact Earth early to midday on Dec. 8, potentially causing periods of strong (G3) geomagnetic storming.

Aurora forecast map courtesy of NOAA’s Space Weather Prediction Center. (Image credit: Map: NOAA Space Weather Prediction Center, background graphic added in Canva Pro.)

NOAA’s 3-day forecast, geomagnetic storm activity is expected to be best at the following times:

4:00 p.m. – 10:00 p.m. EST (2100-0300 GMT): Minor G1 level storming possible10:00 p.m. – 1:00 a.m. EST (0300-0600 GMT Dec. 9): Moderate G2 level storming possible1:00 a.m. – 10:00 a.m. EST Dec. 9 (0600-1500 GMT) Moderate and strong G2/G3 level storming possible10:00 a.m. – 7 p.m. EST Dec. 9 (1500-0000 GMT) Minor G1 level storming possible.

iOS and Android. However, any similar app should work well. I also use the “Space Weather Live” app, which is available on iOS and Android, to get a deeper understanding of whether the current space weather conditions are favorable for aurora sightings. Want to capture the perfect photo? Our how to photograph auroras guide can help.