What does the abbreviation "+TSRA BR" indicate in a weather report?

The abbreviation "+TSRA BR" in a weather report conveys specific information about weather conditions, particularly involving thunderstorms.

The "+TS" indicates a heavy thunderstorm, which suggests a significant intensity of rain and possibly hazardous conditions associated with such storms. The "RA" component signifies rain, reinforcing that precipitation is occurring alongside the thunderstorm. Finally, "BR" stands for mist, indicating reduced visibility typically associated with moisture in the air, such as fog or mist that may form when warm, moist air is present.

Thus, this combination communicates that there are heavy thunderstorms accompanied by rain showers and mist, which aligns perfectly with the option selected. This knowledge is crucial for drone operations, as such weather can severely impact visibility and the safety of flight.