Overview

• NOAA’s Space Weather Prediction Center expects active to G1 (Minor) storm levels on Sunday as a negative-polarity coronal-hole high-speed stream reaches Earth.
• Forecasts indicate activity building from late Oct. 11 with peak chances on Oct. 12, with visibility possible after dark Sunday into early Monday.
• Aurora may be visible in Alaska and northern parts of Washington, Idaho, Montana, Wyoming, North Dakota, South Dakota, Minnesota, Wisconsin, Michigan, New York and Maine, as well as parts of Canada.
• The fast solar wind from an Earth‑facing coronal hole is expected to push the auroral oval farther south than usual.
• Real-time checks of Bz and Kp via NOAA’s 30-minute aurora forecast or aurora apps are recommended, with a sustained southward Bz near −5 nT often preceding visible displays.