The watchman is a prophet and intercessor called to bring the Word of God to Israel, the Body of Christ. We use the term watchman to include both roles of prophet and intercessor.
Gird yourselves, and lament, ye priests: howl, ye ministers of the altar: come, lie all night in sackcloth, ye ministers of my God: for the meat offering and the drink offering is withholden from the house of your God. Sanctify ye a fast, call a solemn assembly, gather the elders [and] all the inhabitants of the land [into] the house of the LORD your God, and cry unto the LORD, Joe 1:15 Alas for the day! for the day of the LORD [is] at hand, and as a destruction from the Almighty shall it come.