MIAMI — Tropical Storm Julia formed off the Guajira Peninsula of Colombia early Friday and is forecast to become a hurricane this weekend, while it moves across the Caribbean Sea toward Nicaragua where it’s expected to make landfall. The National Hurricane Center announced the formation of Julia Friday morning. Julia is not a threat to Florida and is the 10th named storm of the 2022 Atlantic hurricane season. “Life-threatening flash flooding and mudslides are expected across portions of Central America this weekend,” according to the hurricane center. The system is about 140 miles north-northw…