Where does info on brutal winter a coming come from? Almanac? Fortune teller?
Almanac, observations of natural phenomenon of insect and mammal behavior, and sunspot levels (coupled against previous levels/weather correlations).
Anecdotally, it’s in BOTH Almanacs...but if you look to the activity of the sun, you would see that we are entering a minimum of solar activity. Read up on the Maunder Minimum. Lack of solar storms/flares lends to a colder earth. A solar maximum (a lot of activity on the surface of the sun) a warmer earth. The documented cycles go back to the time of Galileo.