As this year's Old Farmer's Almanac predicts, the longest, harshest and coldest winter awaits Americans. Janice Stillman, editor of the 230-year-old winter 2021-2022 almanac, said Americans should prepare for «one of the longest, coldest winters we've ever seen.» And while the accuracy of the almanac's forecasts is debatable, there are fears that an icy combination of above-average snowfalls is expected in the US this year, and temperatures will drop below…