(Whitewater Valley)--Road crews are preparing for the arrival of the first significant snowfall of the late fall season.  The Wayne County Highway Department will begin monitoring conditions overnight tonight and dispatch trucks armed with salt and sand.  Currently, the National Weather Service in Wilmington has put I-70 as the dividing line between just an inch or two and up to five inches.  But, they say that could change either way as the precipitation gets closer.  A winter storm watch goes into effect at 7 o'clock Saturday morning for Wayne, Randolph, Henry, and Darke County.