A big 14¢ jump at the gas pump is threatening to put a dent in the budget of drivers around southwest Michigan. According to the latest survey from Triple-A Michigan, prices in Benton Harbor and St. Joseph rose as much as the rest of the state with a 14¢ jump to an average of $2.70. The statewide average is a penny higher, and that’s up 42¢ from this time a year ago. GasBuddy spotters say South Haven’s prices, which are typically lower, aren’t that much cheaper right now and range from $2.65 to $2.68 a gallon. The auto club says the highest prices are in Jackson at $2.77, while drivers in Marquette have the lowest prices at $2.64. Triple-A isn’t offering much of an explanation for the increase other than seasonal volatility in prices.