NOAA Issues G4 ‘Severe’ Geomagnetic Storm Watch for Nov. 12 After X5.1 Solar Flare — Northern Lights Possible as Far South as Indiana Tonight (Nov. 11)
Published: November 11, 2025 Key takeaways What changed today (Nov. 11) NOAA’s Space Weather Prediction Center (SWPC) posted a G4 (Severe) watch for Nov. 12, citing multiple coronal mass ejections (CMEs) now en route — including the most energetic, linked