Tropical Storm Julia strengthened over the Southwest Caribbean Sea on Saturday morning. At 8:00 a.m. EDT on Saturday the center of Tropical Storm Julia was located at latitude 12.8°N and longitude 79.0°W which put it about 165 miles (2705 km) east-southeast of Isla de Providencia, Colombia. Julia was moving toward the west at 21 m.p.h. (33 km/h). The maximum sustained wind speed was 60 m.p.h. (95 km/h) and there were wind gusts to 75 m.p.h. (120 km/h). The minimum surface pressure was 994 mb.

A Hurricane Warning was in effect for San Andres, Providencia, and Santa Catalina Islands. A Hurricane Warning was in effect for the portion of the coast from Bluefields to Puerto Cabezas, Nicaragua. A Hurricane Watch was in effect for the portion of the coast from Puerto Cabezas, Nicaragua to the border with Honduras. Tropical Storm Warning were in effect for the portion of the coast from Bluefields, Nicaragua to the border with Costa Rica and from Puerto Cabezas to the border with Honduras. A Tropical Storm Watch was in effect for the portion of the coast from Punta Patuca, Honduras to the border with Nicaragua.

Tropical Storm Julia strengthened over the Southwest Caribbean Sea east of Nicaragua on Saturday morning. More thunderstorms developed near the center of Julia’s circulation and in bands revolving around the center. Storms near the center of circulation generated upper level divergence that pumped mass away from the tropical storm. The removal of mass caused the surface pressure to decrease. Winds to tropical storm force extended out 110 miles (175 km) from the center of circulation.

Tropical Storm Julia will move through an environment favorable for intensification during the next 18 hours. Julia will move over water where the Sea Surface Temperatures are near 29˚C. It will move under the axis of an upper level ridge over the Caribbean Sea. The upper level winds are weak near the axis of the ridge and there will be little vertical wind shear. Tropical Storm Julia will intensify during the next 36 hours. Julia is likely to strengthen to a hurricane during the the next 12 hours. Tropical Storm Julia could intensify rapidly after an inner core with an eye and an eyewall form.

Tropical Storm Julia will move south of a high pressure system over the Caribbean Sea. The high pressure system will steer Julia toward the west during the next 36 hours. On its anticipated track Tropical Storm Julia will reach San Andres, Providencia and the Santa Catalina Islands by Saturday evening. It could be a hurricane by that time. Julia could reach the coast of Nicaragua early on Sunday. Julia will bring strong gusty winds and locally heavy rain. Heavy rain will cause flash floods in some locations. Julia could also cause a storm surge of up to 7 feet (2 meters).