Which of the following is NOT an example of a current weather chart available at the FSS or NWSO?

The correct answer is the Flight Plan Chart, which is not considered a current weather chart available at the Flight Service Station (FSS) or the National Weather Service Office (NWSO). Current weather charts typically provide real-time information related to the atmospheric conditions that pilots need for flight planning and navigation. These charts include surface analysis data, weather depiction, and winds and temperatures aloft, all of which depict existing weather phenomena such as fronts, cloud cover, and wind patterns at various altitudes.

A Flight Plan Chart, on the other hand, is used for outlining a pilot's intended route, waypoints, and altitudes rather than for depicting the current weather conditions. While weather considerations are essential when filing a flight plan, the chart itself is more oriented towards navigation and planning rather than providing ongoing weather data. Thus, it stands apart from the other options that specifically focus on real-time weather information.