Overview
- NOAA’s Space Weather Prediction Center has a March 19 storm watch with G2 activity likely and isolated G3 periods possible from the March 16 coronal mass ejection.
- Best viewing typically falls between 10 p.m. and 2 a.m. local time from dark, north‑facing locations, with activity expected late Wednesday into early Thursday.
- Forecast maps show potential visibility across much of Canada and roughly 18–20 U.S. states, including Alaska and northern parts of Washington, Montana, the Dakotas, Minnesota, Wisconsin, Michigan and Maine, with faint horizons possible as far south as Oregon and Illinois.
- A new moon on March 19 and the seasonal equinox effect increase the chances of visible displays if geomagnetic conditions strengthen.
- NOAA notes possible minor impacts to high‑latitude power systems, satellites and high‑frequency radio, and urges continued monitoring of solar wind speed and the interplanetary magnetic field (Bz).