What does +TSRAGR represent in weather coding?

The code +TSRAGR specifically denotes a thunderstorm event that involves heavy rain and the presence of hail. In meteorological coding, the symbols used have distinct meanings: the '+' indicates that heavy precipitation is occurring, 'TS' stands for thunderstorms, and 'RAG' includes the possibility of rain and hail. This combination signifies that not only is there a thunderstorm current, but that it's also producing intense rainfall and hail — a common occurrence during severe thunderstorms. This precise coding is crucial for weather observers to communicate specific weather phenomena clearly and effectively, as it helps in understanding the severity and characteristics of the storm conditions.

The other options, while related to thunderstorms or precipitation, do not accurately capture all elements represented by +TSRAGR, particularly the inclusion of heavy rain and hail in the context of thunderstorms.