CASA Dallas Mesonet Map (IMAGE) University of Massachusetts Amherst Caption CASA's overlapping network of four radar units, which will eventually grow to eight, can look for storms closer to the ground where tornados actually form. They report data every minute instead of every five, as the national system in use does now. Also, networked radars offer much finer resolution and provide significantly improved data on rainfall amounts, wind shear and tornado signatures within a storm. Credit courtesy of UMass Amherst Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.