On August 9, the National Hurricane Center (NHC) began monitoring a tropical wave associated with a small area of convective activity between the Cape Verde Islands and the western coast of Africa.

[4] The depression developed deep convection around the center of circulation and continued to track generally towards the west in response to a mid-level subtropical ridge to the north.

[8] By the afternoon of August 13, the system had weakened to a tropical depression and shortly thereafter, degenerated into a non-convective remnant low-pressure area as it failed to maintain convection around the center for 24 hours.

They found that the system was regenerating[11] and shortly after, the NHC began re-issuing advisories on the depression when it was located roughly 1,075 mi (1,730 km) east of the Leeward Islands.

[13] Early on August 15, the NHC upgraded the depression to a tropical storm, giving it the name Ana as deep convection developed around the center of circulation.

[15] By August 16, the forward motion of Ana began to increase, and the storm quickly entered a region of dry, stable air.

[18] Early on August 17, radar imagery from Guadeloupe and San Juan, Puerto Rico depicted a system without a closed, low-level circulation.

[22] On August 17, the National Weather Service in San Juan, Puerto Rico issued an Urban and Small Stream Flood Advisory for all of the eastern municipalities on the island.

[24] In the Dominican Republic, officials posted flood alerts for 12 provinces as the remnants of Ana were forecast to produce up to 6 in (150 mm) of rain in the country.

[25] General Luna Paulino of the civil army activated relief agencies ahead of the storm and notified residents of possible mandatory evacuations.

[27] In nearby Haiti, officials placed the country under yellow alert as the remnants of Ana could produce heavy rainfall over mountainous areas.

[29] In Puerto Rico, rainfall was limited due to the storms' fast motion, triggering minor flooding but little damage.