By Carmen FormanStaff writercforman@oklahoman.comOklahoma saw its worst winter storm in decades last week, but don’t go blaming climate change for the bitter cold and heavy snow just yet. Climate change is a phenomenon studied on a global scale over the course of decades. Two University of Oklahoma professors said that makes it nearly impossible to label a singular weather event, even one that brings subzero temperatures to a large swath of the United States, a result of climate change. “The data does not support being able to attribute what’s going on now to climate change,” said Kevin Kloesel, director of the Oklahoma Climatological Survey. Climate scientists look for patterns, and if historic winter storms begin to happen more frequently, that could be a sign of climate change, the OU meteorologist said in a phone interview Thursday after a second storm hit the state within a matter of days. Extreme weather conditions in Oklahoma may seem significant to the state’s residents, but are minuscule in comparison to the global climate picture, said Renee McPherson, director of the South Central Climate Adaptation Science Center.Read more on NewsOK.com