Skywatchers across Colorado may get a rare treat Monday night as increased solar activity could push the northern lights far enough south to become visible in parts of the state with a Kp value of 8 out of 9.

The aurora could be visible across Canada and much of the northern tier of U.S. states — and possibly farther south — Monday night following a major disturbance in the Earth's magnetic field, a forecast shows.

A NOAA forecast has Northern Lights visible in northern U.S. states overnight on Monday, Jan. 19 through Tuesday, Jan. 20, as a “full-halo” CME heads to Earth.

The Northern Lights phenomenon was seen widely across Scotland on Monday, from Orkney in the north all the way to the Borders.

The National Oceanic and Atmospheric Administration is predicting a G4-level geomagnetic storm after a long-duration solar flare erupted a couple of days ago.