Question

how is radar used to forecast weather?
it shows areas of high and low pressure.
it collects data in the upper atmosphere.
it collects weather data as part of a network around the country.
it locates and tracks storms, and follows the path of storm systems.

Explanation:

Radar in weather forecasting is mainly used to detect precipitation. It can locate storms (by detecting where precipitation is occurring which often indicates storm presence) and track them (by continuously monitoring the movement of the precipitation - related echoes over time, thus following the path of storm systems). Areas of high and low pressure are typically analyzed using weather maps and barometric data rather than radar. Collecting data in the upper atmosphere is more related to tools like radiosondes. And while radar is part of a weather - monitoring network, its key unique function among the options for weather forecasting in terms of its direct operational role is storm - related detection and tracking.

Answer:

It locates and tracks storms, and follows the path of storm systems.