The deaths should give everyone pause, Eilts says, and experts should weigh whether new guidelines are necessary to keep storm chasers safe.
But Eilts says there's no doubt that studying tornadoes on the ground is crucial.
"Our whole country's built upon research and development and enhancement. Ultimately if we can save 100 lives more every year because we have better tornado warnings, that's worth it," he says. "Being in the field is an important part of that research. That has to go on."