Which weather phenomena are reported in the body of a METAR but not necessarily forecast in a TAF?

The correct response highlights that RVR (Runway Visual Range), temperature, and dew point are reported in the body of a METAR but may not always be included in a TAF (Terminal Aerodrome Forecast). METARs provide current weather observations, which include detailed information about visibility, temperature, humidity, wind speed and direction, and significant weather phenomena like precipitation. RVR is particularly important at airports as it indicates how far a pilot can see along the runway, which is crucial for safe landings, especially in low-visibility conditions.

On the other hand, TAFs are forecasts intended to provide weather predictions over a specific period, typically for a 24 to 30-hour timeframe, focusing on significant weather changes likely to affect aerodrome operations. While TAFs will predict general weather trends and conditions, they might not delve into specifics such as RVR or provide detailed temperature and dew point readings, which can fluctuate frequently and are better suited for real-time reporting rather than forecasting.

The other options primarily contain elements that are typically either forecasted in TAFs or do not align with the distinction between METAR reporting and TAF forecasting. For instance, winds and temperatures are both common in TAFs, while rain and