Tropical Storm Cristobal became the earliest third named storm over the Atlantic Ocean in what forecasters predict will be an above-average hurricane season.

As of Tuesday, Cristobal was packing 40 mph maximum sustained winds after forming in the Gulf of Mexico northwest of the Yucatan Peninsula in the Bay of Campeche, according to the National Hurricane Service. The system is moving southwest at a leisurely 3 mph, but some forecasts show it turning north toward Louisiana this week.