A white Christmas is going from reality to more of a dream for chunks of the United States.
Will Carr has the latest news after more than two dozen reports of tornadoes across the Heartland.seems to be slowly morphing from a reliable reality to a dream of snowy holidays past for large swaths of the United States in recent decades.
The last one was in 2017 in Dubuque, which weather records show used to have white Christmases nearly two out of three years. The change was particularly pronounced in a swath from about the Mason-Dixon line to just north of Detroit, Chicago, and Nebraska. The Christmas snow cover average there went from nearly 55% in the 1980s to slightly above 41% now, the Arizona data shows. Average snow depth fell from 3.5 inches to 2.4 inches .
A separate analysis by the National Oceanic and Atmospheric Administration looks at “climate normals” — 30-year periods for about 5,000 weather stations across the lower 48 states. Comparing normals for 1981-2010 to normals for 1991-2020 shows more stations are seeing statistical odds for a white Christmas shrink, but the agency cautions against drawing a conclusion about any trend.
A data set from Rutgers University’s global snow lab finds continental U.S. snow in the last week of December slightly increasing, not decreasing, said climate scientist David Robinson, whose data based on satellite imagery goes back to 1966.Often people in their 60s and 70s think there are fewer white Christmases, he added, because the 1960s had more than usual white Christmases.
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Since 1980s US chances of a white Christmas melt a bit | AP NewsA white Christmas seems to be slowly morphing from a reliable reality to a dream of snowy holidays past for large swaths of the United States in recent decades. Analysis of 40 years of December 25 U.S.
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