1.   Never mind Doppler radar, people were saying.

2.   State-of-the-art Doppler radars monitored rainfall, while a new computer network let the service swap data in real time with states and counties.

3.   The Doppler radars that many television stations in major markets have bought in recent years allow them to pinpoint storms in their broadcast areas.

4.   The mobile Doppler radars are mounted on the backs of two trucks, which are driven right into storms, tornadoes and even hurricanes.

5.   The same principle applies to radio waves emitted by Doppler radars.

6.   Wurman and his colleagues use the second strategy, chasing storms and tornadoes in two flatbed trucks on which Doppler radars are mounted.

7.   Doppler radars can sense the speed and direction of wind movement.