The Aurora Borealis, or Northern Lights, is predicted to be visible in 19 U.S. states during the late-night hours of March 18 into the early morning of March 19. This is due to a moderate to strong geomagnetic storm forecasted by NOAA's Space Weather Prediction Center. The visibility is enhanced by the 'equinox effect,' which aligns Earth's magnetic field with solar winds, increasing the intensity of auroral displays.