From just the right angle on the balcony of the National Hotel Sunday morning, Nevada City will resemble New Orleans, as the procession of celebrants will parade down Broad Street in the culmination of the town’s Mardi Gras weekend festivities. “I’m so excited about this event. It brings a lot of energy to town,” said Cathy Whittlesey, executive director of the Nevada City Chamber of Commerce. “February is a slow time for Nevada City, and this event reminds folks of our festive atmosphere,” she said. At the front of this year’s parade, just behind two color guards but ahead of …