K AR EN KOS I BA (BS ‘99) • R E S E AR CH ME T EOROLOGI ST AND SE V E RE WE ATHER EXP E R T
Ahead of the storm
in the South. In May, storms tore through Oklahoma, Kansas, and Arkansas, and on May 22, a massive tornado swept through Joplin, Missouri, becoming the deadli- est tornado since 1953. Although weather forecasting and warning systems have certainly improved in the last half-century, one reason tornadoes are still so destructive is that scientists have much to learn about them. Karen Kosiba (BS ’99), PhD, a research meteorologist and severe weather expert, is one of those scientists hoping to learn more. “With the knowledge we have
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right now, on average, we have a 13-minute lead time on a tornado warning,” she says. “That isn’t a huge amount of time for people to plan and get to safety. The ultimate goal is to improve forecast models and warning systems, and
n April and May of this year, tornadoes tore through the United States. Almost 300 people were killed in a late- April barrage of tornadoes
Unlike hurricanes, which are
Karen Kosiba (BS ‘99) and her colleagues drive to position themselves where severe weather is likely to strike so they can observe and collect data as the storm is happening.
to do that, there is still much to be learned about how tornadoes form and do damage.” A physics major at Loyola, Kosi-
ba earned a master’s in physics and in teacher education at Miami Uni- versity and a PhD in atmospheric science at Purdue. She now works at the Center for Severe Weather Research in Boulder, Colorado. A large part of her research is con- ducted in the field, which means driving up close to tornadoes in 25,000-pound trucks with radars on them—they’re called Doppler
on Wheels (DOWs)—and collecting data on their wind structure and circumstances of formation. “We become mobile during
peak tornado season, usually May and most of June, in order to maximize our chances of collect- ing tornado data,” Kosiba says. “On a typical day, we forecast regions that likely will have favorable conditions for tornadoes, and then drive close to that region the night before. Once storms develop, we drive up close to phenomena and collect data.”
huge and can be tracked by satel- lite, tornadoes form and disappear relatively quickly. “The supercell storms that produce tornadoes look similar to the ones that don’t on the radar,” Kosiba explains. “That is one of the reasons we have a 75 percent false alarm rate.” Kosiba and her fellow research-
ers hope to gather and analyze enough information about torna- does to better determine when and where they’ll form. Kosiba did not travel to Joplin
to study the tornado that wreaked havoc on the town because the hilly and tree-filled landscape isn’t ideal for scientific instrumentation. Nevertheless, the research Kosiba and her colleagues are conducting may one day help to prevent the loss of life and property that char- acterized the Joplin disaster. The better tornadoes are understood, the more accurate and timely warn- ing systems will become, enabling people to get safely out of harm’s way.
24 LOYOLA UNIVERSIT Y CHICAGO
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