How far from gaithersburg maryland to naperville illinois?
Exactly 700 miles.
It is impossible to predict a tornado so far in advance. While there is a risk of tornadoes across northern and central Illinois, we will not know where specific tornadoes will occur until they occur. Given the risk, though you should stay alert not just for tornadoes, but for destructive thunderstorm wind, hail, and lightning. Stay indoors if at all possible.
It was Cumberland, Maryland. The "national road" or "Cumberland Road" was constructed by the federal government beginning in 1811. It was paved as far westward as Wheeling, West Virginia by 1818 and Vidalia, Illinois by 1839 (at which time construction was ended). Planning for the road was started by President Thomas Jefferson in 1806.