Heads up, Bay Area. The Northern Lights are back. After lighting up skies across Novato, Petaluma, Santa Rosa, and San Rafael last night, the aurora borealis could return tonight (Wednesday, Nov. 12) thanks to a rare geomagnetic storm. When to look: 6 p.m. to 6 a.m. (best around midnight)Where: Look north and find a dark spot away from city lights.