Ghostly false dawn light display expected before sunrise

A rare atmospheric event known as a “false dawn” is set to illuminate the pre‑dawn sky in the coming days, offering a striking visual for skywatchers who know where to look. The phenomenon occurs when scattered sunlight from the upper atmosphere creates a faint, diffuse glow that precedes the actual sunrise, giving the impression of a premature sunrise. Meteorologists say the effect will be most visible in the early morning hours of March 12 – 13, when the sun is just below the horizon and the sky’s lower layers are illuminated by the scattering of light from higher altitudes.

The false dawn is expected to be most pronounced over the western United States, particularly in the high desert regions of Nevada and Arizona, where clear skies and minimal light pollution provide optimal viewing conditions. Observers will see a subtle, ghostly light that gradually brightens and then fades as the true sunrise approaches. The event is caused by Rayleigh scattering of sunlight in the upper atmosphere, which creates a halo of light that can be mistaken for dawn until the sun rises. Weather services advise checking local forecasts for cloud cover, as any significant cloudiness could obscure the effect.

Astronomers and atmospheric scientists are monitoring the event as it offers a natural laboratory for studying light scattering and atmospheric composition. While the false dawn is a harmless optical illusion, it provides an opportunity for amateur astronomers and photographers to capture a rare moment in the sky. Those interested in witnessing the phenomenon are encouraged to head to high‑elevation sites with unobstructed views of the horizon and to bring suitable eye protection for observing the brightening sky.