Overview

• NOAA’s Space Weather Prediction Center predicts a Kp index of up to 5.67, signaling minor to moderate geomagnetic storms overnight.
• Auroras may be visible in 15 states, including Alaska, Washington, Montana, Minnesota, Michigan, New York and Iowa, reaching farther south than usual.
• The display is driven by a high-speed stream of charged particles from a solar coronal hole interacting with Earth’s magnetic field.
• Optimal viewing occurs between 10 p.m. and 2 a.m. local time away from city lights on a clear northern horizon.
• Shortened nights following the summer solstice could limit the window of darkness needed to see the aurora in higher latitudes.