The northern lights will color Colorado skies once again tonight, according to the National Oceanic and Atmospheric Administration. Last week’s burst of geomagnetic storms was just a sampling of the ones expected to reach Earth tonight, meaning the lights will be more vibrant and easier to see — especially if you know where to look. The NOAA’s Space Weather Prediction Center a severe, G4 geomagnetic storm watch for Thursday — the second strongest storm level on the scale. Space weather officials said a G4-level coronal mass ejection “erupted from the Sun” Tuesday evening and is expected to arrive at Earth on Thursday. G4 storms are rare, according to space weather officials.