TUCSON, Ariz. (KVOA) - A new study from the University of Arizona reveals how historical tree-ring data can help predict extreme summer weather events. Researchers, led by Ellie Broadman, analyzed tree rings to understand locked jet stream wave patterns, often preceded by La Niña winters, which can result in severe weather impacting agriculture and public health.

"These types of patterns are particularly impactful, especially when they occur in major crop-growing regions," Broadman said.

The study, published in AGU Advances, presents the first-ever reconstruction of historical jet stream patterns over the last 1,000 years. By using tree-ring data, researchers identified drought patterns correlating with locked wave5 jet stream behavior.

"We don't have direct observational data on the je

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