Overview
- NOAA’s Space Weather Prediction Center forecasts G2 (moderate) geomagnetic storming with a chance of isolated G3 (strong) periods on March 19.
- Auroras could be visible across roughly 19–20 U.S. states, potentially reaching as far south as parts of Illinois and Oregon depending on storm strength.
- The best viewing window is generally 10 p.m. to 2 a.m. local time in dark, clear locations away from city lights, with updates available on NOAA’s Aurora Dashboard.
- Forecasters caution that confidence will improve once satellites sample the CME near Earth, which will clarify the timing, intensity and duration of any storm.
- A new moon on March 19 will provide darker skies, though local cloud cover will ultimately determine visibility.