The National Hurricane Center thinks a tropical depression could form in the Caribbean soon.

It’s too soon to say if the potential storm could affect the U.S.

The hurricane center has been watching for an area of low pressure to form in the western Caribbean, near Central America, for the past week.

Forecasters raised the probability of a depression forming to 70 percent on Friday and said it would likely happen this weekend or early next week.

The hurricane center thinks the disturbance will track to the north or northwest in the next few days, spreading rain over parts of Central America and the western Caribbean.

A system has to have sustained winds of 39 mph and a defined center of circulation to become a tropical storm and get a name. The next name on the list is Patty.

The hurricane center on Friday was also watching two other areas for potential development, but both had low chances of becoming tropical depressions on Friday.

However, one of them was near Puerto Rico. It was generating rain and storms on Friday and could slowly develop over the next few days — but then it could be swallowed up by the system in the western Caribbean, forecasters said.

It had only a 10 percent chance of becoming a depression in the next week.

It will spread more rain across the Leeward Islands, Puerto Rico, Cuba and the southeastern Bahamas.

The other area to watch was far away in the northern Atlantic.

A non-tropical area of low pressure there could take on some subtropical features over the next few days as the system moves eastward. It won’t affect the U.S. and has only a 10 percent chance of becoming a depression.

There are just a few more weeks left in the Atlantic hurricane season. The last day will be Nov. 30.