Powerful snow systems causing between five and 24 inches of snow threaten to disrupt holiday weekend travel in four states, with forecasts, timing, and expert tips to prepare for dangerous winter driving.

Most likely, these snow showers will amount to a dusting to an inch for parts of the state, with a few localized spots picking up as much as 3 inches early Saturday morning. Temperatures will be in the upper 20s for most of the night before warming above freezing during the day on Saturday, likely limiting any daytime slick spots on the roads.