The National Hurricane Center announced at 11 pm EDT that Subtropical Storm Ana has formed south of Myrtle Beach SC and is moving north very slowly.  A subtropical storm is a storm that has some characteristics of a mid-latitude system and some characteristics of a tropical, warm core system.  You can read more about the distinction between types at Wikipedia and at Weather Underground.

If you are along the Atlantic coast you will want to be sure to follow the updated forecasts for the storm closely to see if it strengthens over the warm Gulf Stream and if it becomes more tropical in characteristic over time.  The main impacts of the storm are expected to be gusty winds to 45 miles per hour, high waves and beach erosion, and rainfall of 2-4 inches in the affected areas.

ana path forecast