WeatherGuesser wrote:And the reprieve will be ... when?
I can't read these Rorshack tests.
That's just a prediction by the Euro model for this morning. Anything blue is below 32F, anything purple is below -6F. Look at the expanse that will be below 0 this morning. It's -1F here in Cincinnati, which the model accurately predicted 2 days in advance. You could go to a model page and scroll through the days but the further out you go the less accurate it gets. Local forecasts take multiple models into account and are usually much more accurate.
BUT, since you asked ...

I selected the current model output, Max Temp F over 6 hours.
https://weather.us/model-charts/euro/usa-east/max-temp-2m-6h/20180101-1800z.htmlUsing the 'Valid For' dropdown I tried to find when a warmup would occur, if any. Looks like we a decent warmup the 7th or 8th of January. The western KY area will reach a whopping 32F on the 3rd before cooling down again. Just one model though, and the euro seems to be a little less accurate in the winter.