The renowned Colorado State University hurricane forecast team on Friday issued an updated forecast for the 2013 Atlantic Hurricane Season with a continued call for above normal activity. The forecast, issued by Dr. Philip Klotzbach and Dr. William Gray, was lowered from their previous outlook released in June. This was mainly due to cooler than normal conditions observed in the eastern subtropical and tropical Atlantic Ocean.
The forecast now calls for a total of 18 named storms for the season. That includes the 4 named storms we have already seen up to and including Dorian. They expect 8 of those storms to become hurricanes, and 3 of those to be major hurricanes (Category 3 or higher). They also expect an above normal chance of a major landfalling hurricane in the Caribbean and the United States.
You can read the complete forecast here: http://hurricane.atmos.colostate.edu/Forecasts/2013/aug2013/aug2013.pdf