MIAMI — Tropical Storm Julia formed off the Guajira Peninsula of Colombia Friday morning and is forecast to turn into a hurricane this weekend while it moves across the Caribbean Sea toward Nicaragua. The National Hurricane Center announced the formation of Julia in its advisory at 11 a.m. Friday. Julia is the 10th named storm of the 2022 Atlantic hurricane season and is not a threat to Florida. “The risk of flash flooding continues today over portions of the Guajira Peninsula. The potential for life-threatening flash flooding and mudslides is expected to spread to portions of Central America …