harbinger:
(plural: ‘harbingers‘; pronunciation: the letter ‘g’ rhymes with the letter ‘j’ in “judge”)
(old usage) an official from a royal family sent in advance to make arrangements at a place that the royal family planned to visit and to announce the arrival of the royal family to the people gathered;
a person that lets one know that something is to happen or is going to happen in a short time;
a forerunner,

Ms Kausalya Santhanam, hailed as the ‘harbinger of hope’ by millions of cancer patients in India
Many people around the world believed that the US president, Barrack Obama, was the harbinger of real freedom and equality, particularly in the African-American communities.
When the old bishop, the chief priest of the Catholic Church, supported gay (same sex) marriages openly, he was hailed as the harbinger of a new society by the gay people all over the world.
The staff curses the assistant manager as ‘the harbinger of doom’ because when he approaches a particular staff member, nine out of ten times, it is to give that poor employee some bad news.

dark clouds, the harbingers of heavy rain
