Doppler wind estimation provides what information for weather planning?

• A. Humidity and dew point.
• B. Cloud base height.
• C. Wind velocity and shear information across storm systems.
• D. Solar radiation flux.

Answer: (C)

Doppler wind estimation provides wind velocity and shear information across storm systems. It works by measuring the Doppler shift of radar signals reflected by precipitation, which reveals how fast air is moving toward or away from the radar along the line of sight. By combining data from many angles, meteorologists map the horizontal wind field and detect wind shear—how wind speed and direction change with distance or height around storm features like updrafts, gust fronts, or mesocyclones. This information is essential for weather planning because it helps assess storm severity, track rapid changes, and inform aviation and hazard mitigation decisions where strong winds and shear pose risks.

Humidity and dew point come from thermodynamic measurements, not Doppler wind data. Cloud base height is typically derived from reflectivity or other radar/ceilometer data, not the velocity information Doppler methods provide. Solar radiation flux is unrelated to Doppler wind estimation.