Flight watch
Flight Watch is the common name in the United States for an En route Flight Advisory Service (EFAS) dedicated to providing weather to and collecting reports from pilots while in flight.
While U.S. Flight Service Stations (FSS) operate Flight Watch, Flight Watch does not provide a full range of FSS services such as filing flight plans, acquiring preflight weather briefings, providing NOTAMs, or picking up IFR clearances; instead, it is limited to the following: