Which source provides reports crucial for indicating the presence or forecast of thunderstorms?

The correct choice highlights the importance of WARP/NEXRAD (Weather and Radar Processor/NEXt generation weather RADAR) and METAR reports (Meteorological Aerodrome Reports) in providing real-time and accurate information about the presence or forecast of thunderstorms.

WARP/NEXRAD technology uses radar to detect precipitation intensity and movement, which is crucial for identifying areas where thunderstorms are forming or already occurring. This radar data can indicate storm strength and track progression, allowing for timely awareness and prediction.

METAR reports are routine aviation weather reports that include real-time observations of weather conditions at airports. These reports provide critical information including visibility, cloud cover, precipitation, and significant weather phenomena, such as thunderstorms. When a thunderstorm is occurring or is in the forecast, it will be documented in these reports, ensuring pilots and air traffic controllers are aware of live weather conditions that could affect flight safety.

In contrast, while PIREPs (Pilot Reports) and Terminal Area Forecasts also provide valuable weather information, they are not as directly focused on the real-time tracking of thunderstorms. Flight plans and ATC advisories involve operational communication but do not contain specialized meteorological data specific to thunderstorm activity. Weather alerts can convey warnings of severe weather, but temperature