According to the NH DOT's winter plowing map [1] most of the area around Lancaster is in the "plow every three and a half hours and try to let no more than seven inches accumulate" group. The interstates/turnpikes are every hour and a half/no more than three inches.

Of course, I recently watched a city budget meeting during which an inability by the state and municipalities to find enough plow drivers was discussed, so who knows?

Of course the snow showers could turn into ice showers, in which case all bets are off.

[1] https://www.nh.gov/dot/org/operations/highwaymaintenance/documents/winter_main_road_map_key2021_REVISED_DATE.pdf