Exciting news for skywatchers! The aurora borealis, also known as the northern lights, is expected to be visible across up to 20 northern U.S. states from Saturday night, April 18, into Sunday morning, April 19. This forecast comes from space weather experts at the National Oceanic and Atmospheric Administration (NOAA), who are predicting a G1 or G2 geomagnetic storm. This indicates a good chance of seeing the aurora on the northern horizon.