A weather condition indicated by "+FC" refers to which of the following?

The notation "+FC" refers specifically to the presence of "funnel clouds" or "tornado/water spout" conditions in meteorological reports. This designation indicates that the weather being reported includes severe weather phenomena, particularly related to rotation and potential tornado development. These events can lead to significant hazards, making it crucial for pilots and unmanned aircraft operators to be aware of them while planning flights or conducting operations.

In the context of aviation, where understanding weather conditions is vital for safety, recognizing the implications of "+FC" is key. While other weather-related terms may indicate different types of severe conditions or environmental hazards, "+FC" distinctly points to conditions that can spawn tornadoes or waterspouts, which are among the most dangerous weather phenomena an operator may encounter.