By Dale DenwaltStaff writerddenwalt@oklahoman.comMeteorologists have finished a month-long field study tracking and gathering data from severe storms. They hope to learn more about how tornadoes form by studying the conditions present when they do, and also when they don't. Field work on the Targeted Observation by Radars and Unmanned Aerial Systems (TORUS) Project wrapped up last week.Read more on NewsOK.com