🧵50-year Fall climatology change thread. Using NCEI county-level nClimDiv climate data, we see that every county in the U.S. shows a positive warming trend. Only 1 county on this map is shaded in gray (Van Buren County Iowa is +0.48°F). 1/ pic.twitter.com/sax14khnRT

— Brian Brettschneider (@Climatologist49) October 3, 2021