What weather phenomenon does "TS" indicate in a METAR report?

In a METAR report, "TS" stands for thunderstorm. This abbreviation is specifically used to denote the occurrence of thunder and lightning associated with severe weather conditions. The presence of thunderstorms can lead to various weather phenomena, including heavy rain, lightning, hail, and gusty winds.

Understanding the significance of "TS" is important for pilots and meteorologists, as it helps them evaluate the weather conditions that could affect flight safety and navigation. The other abbreviations do not represent thunderstorms; for instance, fog and rain showers have specific symbols that differ significantly from the "TS" designation. Thunderstorms are more intense weather events, so proper identification through the METAR report aids in anticipating the potential impact on flight operations.