The hurricane prediction group at Colorado State University released their April prediction for the upcoming Atlantic tropical season.  You can read all the gory statistical details at  https://hurricane.atmos.colostate.edu/Forecasts/2015/apr2015/appdr2015.pdf.  Here are the predicted numbers, with average values in parentheses:

ATLANTIC BASIN SEASONAL HURRICANE FORECAST FOR 2015

Forecast Parameter and 1981-2010 Median (in parentheses)  Issue Date 9 April 2015

Named Storms (NS) (12.0) 7

Named Storm Days (NSD) (60.1) 30

Hurricanes (H) (6.5) 3

Hurricane Days (HD) (21.3) 10

Major Hurricanes (MH) (2.0) 1

Major Hurricane Days (MHD) (3.9) 0.5

Accumulated Cyclone Energy (ACE) (92) 40

Net Tropical Cyclone Activity (NTC) (103%) 45

The probabilities for hitting various segments of the US coastline are also given and show about half the usual probability of a direct hit.

What does this mean for the Southeast?  Generally up to 30 percent of our late summer and fall rainfall come from tropical systems.  If there is less tropical storm activity than usual, that could mean drier than usual conditions for the Southeast later in the growing season.  However, even if there is less activity than usual, one well-placed storm could provide plenty of rain (or even flooding if it is moving slowly) and potentially a lot of damage.  For example, Hurricane Andrew in 1992 was in an El Nino year with very little hurricane activity.  Also, low activity in the Atlantic often goes hand in hand with increased activity in the Eastern Pacific, which could bring additional moisture and potential flooding to the Southwest, southern Plains, and potentially even in the Southeast if the moisture moves far enough east.

Source: NOAA
Source: NOAA