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How Do We Know: Tracking Tornadoes Watch Video

How Do We Know: Tracking Tornadoes

How do we know when a tornado is forming? Scientist Harold Brooks explains how Doppler radars are used to track storm formation.

How Do We Know: Drought Watch Video

How Do We Know: Drought

How do we know when a region may be experiencing an early drought? Dr. Heidi Cullen talks to NASA scientist Molly Brown, who relies on sophisticated satellites for the answer.

Detecting Tornadoes Watch Video

Detecting Tornadoes

Doppler radar is a powerful tool for scientists to spot the formation and path of tornadoes.