Sky‑Spectacle Alert: Rare Northern Lights Could Paint U.S. Skies Tonight—Here’s the Science, the Map and the Expert Warnings You Need
A high-speed solar wind stream is striking Earth’s magnetic field, prompting NOAA to issue a G2 geomagnetic-storm watch for June 24–25, 2025. Auroras may be visible as far south as Illinois, Ohio, and New York. Earlier this month, similar activity produced auroras from Texas to Alberta. NOAA reported K-index values of 4 late Monday, signaling active geomagnetic conditions in the northern U.S.