. >> at the national weather center scientists like jerry brodske works with atmosphere. >> how do you that? >> we collection collection -- we collect observations from surfacing radar. something that can be deployed over a much larger area. here is your radar, and the beam sort of goes out but the earth curves underneath that beam. the further you are from that radar the less coverage you have. what the casa radar does is fill in these gaps. that's the ski to improving our analysis which in turn improves the forecasting. >> with the old star doppler radar -- old style doppler radar how much time would you have? >> if you are a weather forecaster waiting for updating, you wait about five minutes. with the casa radar, it provides information every 60 seconds. >> it is heading right into west moore right now. >> information used by casa and the national weather service helped meteorologists at kfar in oklahoma at the tornado hit moore on may 20th. >> on i-54, big debris ball, the debris ball is over a mile wide. >> advances in storm prediction technology continues to improve. >> if you a