NOAA Forecasts G1 Geomagnetic Storm Tonight, Boosting Northern Lights Chances Across Northern U.S.

Overview

• NOAA’s Space Weather Prediction Center expects minor G1 storm conditions overnight Monday into early Tuesday with Kp values near 5.
• Aurora is most likely in Alaska and the northern tier states including Washington, Idaho, Montana, North Dakota, South Dakota, Minnesota, Wisconsin, Michigan and Maine.
• Faint displays could reach the northern horizon in parts of Wyoming, Iowa, New York, Vermont and New Hampshire if activity strengthens.
• Forecasters link the disturbance to a Sun‑facing coronal hole and a possible corotating interaction region feeding higher‑speed solar wind.
• Viewing prospects improve with clear, dark northern skies and a dim crescent moon, and NOAA’s outlook shows the broader chance tonight with more limited potential Tuesday for the northern Plains.