Tropical Storm Matthew quickly formed Wednesday morning and is expected to strengthen to a hurricane by week's end.
If this is the first time you're hearing about Matthew, you're not alone. The low pressure system formed so quickly that it completely skipped over the "tropical depression" status.
That's not to say we weren't watching it. We were. The National Hurricane Center has been monitoring the developing low pressure for several days.
By Thursday morning, Tropical Storm Matthew was expected to pass several hundreds miles south of Puerto Rico. By Friday it could strengthen into a hurricane as it passes north of Venezuela and Colombia.
So why is this such a big deal for the Carolinas? By Sunday, the storm could take a hard right turn and head towards Cuba as a category two storm. Where it goes from there is not yet known; it's possible Matthew could - or could not - continue toward the Carolinas.
Any direct impact to the United States from Matthew is still days away. On Wednesday night's live edition of Carolina Weather Group, panelist Shea Gibson explained what will cause that hard right turn towards North America.