Oakland’s hip hop forecast: Ovrkast, with a good chance of success

Sporting a pair of gray, paint-splattered, vintage jeans, a teal thermal shirt, two gold chains and a brown beanie, rapper and producer Ovrkast is dancing atop an old pick-up truck on Oakland’s Lakeshore Avenue as a sea of fans swirls around him.  It’s a warm, early October night, just past 9 p.m., an hour when this snazzy strip of restaurants and vintage clothing stores is usually quiet. But tonight the rising rap star and East Oakland native has drawn a proud and excited audience of about 200 to help shoot a video for “Cut Up,” a new song he calls “my anthem to the Bay Area.”  When he raps the line; “Yes, I’m from the Bay,” the crowd goes wild.  As he steps down from the truck, fans shove bottles of prosecco into his arms and line up to take pictures with The Town’s new star. Lota Amamgbo, a 19-year-old fan, sums up what drew him to Ovkast’s music.  “It’s in the genre of stuff I feel like we need more of, especially in …