As category 3 Hurricane Matthew is barreling the coast of Florida, the Southeast United States is preparing for the worst in years.
Hurricane warnings, tropical storm watches and warnings stretch up and down Florida's Atlantic Coast.
While all eyes are on Matthew, Hurricane Nicole is still churning and forming in the Atlantic.
After Matthew makes his way up the coast, Nicole could affect Matthew's track.
Right now, meteorologists are predicting Matthew to make a loop back around as a tropical storm, but if it goes further out in the Atlantic, it could run into Nicole.
And what happens if the two collide?
Then you have a Fujiwhara Effect and it's rare.
The last time this happened was in 2005 when Hurricane Wilma absorbed Tropical Storm Alpha off the east coast.
Right now, it's still too early to tell Matthew's exact path after hitting the east coast, and it's unsure if a Fujiwhara Effect will happen, but Nicole is no threat to the U.S. at this time.
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