1.   All the weather radars send out radio waves from an antenna.

2.   Doppler weather radar is the most sophisticated severe weather detection system.

3.   If someone reports a tornado or if weather radar indicates a thunderstorm is strong enough to produce a tornado, local National Weather Service meteorologists issue a tornado warning.

4.   Investigators from the National Transportation Safety Board and the airline will review the data from the airport radar and the weather service radar, officials said.

5.   Like a flashlight beam, waves from a weather radar expand as they get farther from the source and they do not follow the curvature of the earth.

6.   McLane called out to Barry Waters, Astros director of baseball administration and the fellow charged with monitoring the office weather radar.

7.   Modern-day weather radar did not come about until a century later during World War II, when radar was used to track airplanes.

8.   Nielsen-Gammon said the weather service operates nine Nexrad weather radars in Texas and has information-sharing agreements with additional radars at military bases.

9.   Participants travel in vans equipped with weather radar and other technology.

10.   RaceNet has developed a local weather radar based on the hardware used on supertankers, but it needs skilled operators to work with the proprietary software.