 The following day, while located over Andros Island, the National Hurricane Center (NHC) upgraded the system to a tropical depression, the third of the season, based on its appearance on satellite imagery.Upon becoming a depression on August 10, the forward movement of the storm shifted to the northwest in response to an approaching trough off the Eastern United States and an elongated subtropical ridge to the south.The depression intensified into a tropical storm at 1800 UTC on August 11; however, operationally it was not upgraded until a reconnaissance mission by the hurricane hunters found flight-level winds of .