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Complaints About Nighttime Cold Bias Over Snow
30 DEC Chicago, IL (ORD) WFO's Jim Kaplan called concerning Eta morning sfc temps being 10 degrees F too cold over parts of WI, IL, IN, MI, and OH ever since the Wx pattern turned cold there in the past week. Jim said that there is typically a very tight sfc temp gradient along the edge of a patchy light snow cover area.