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A couple of years ago I followed the forecast for about a month for a bear hunt I was going on. I learned that around day 10 they start to bring the temp in line with the seasonal averages. So in the winter the predicted temp for two weeks out is normally lower than what actually happens.
Sounds like you're referring to Accuweather. NWS long range forecast is a little different.https://www.weather.gov/arx/winter2122?fbclid=IwAR0qlDXTI-1U5z87HC1K3PG-LKT0gq_1Q0NPr9CU_l3pKNzsw6txnlOdgU4