The system slowly strengthened and developed into a separate vortex.

On the afternoon of September 11, the system strengthened into a tropical storm as it turned more to the west.

Several hours later, the system further strengthened into a tropical storm and was named Patricia.

Later that day, the system strengthened into a tropical storm.

The system steadily strengthened into a low pressure area shortly afterwards.

By the morning of June 21, the system had strengthened into a tropical storm.

The new system strengthened the position of the country's traditionalists.

In particular, a system of this kind would strengthen the fight against fraud - and we all know how important that is.

During the 1990s, Argentina's financial system was consolidated and strengthened.

Such a system could strengthen the hand of a third-party candidate.