Residents of the Sierra foothills may finally awaken to snow early next week. Weather forecasters are predicting a moderate storm to strike the area by Tuesday morning after a weekend of sunny skies and warm temperatures. “Tuesday is the main event,” National Weather Service meteorologist Johnnie Powell said. The storm, which Powell described as “below average” for this time of year, will be accompanied by a cold front. The cold temperatures, a high of 40 is predicted for Tuesday, will allow for the snow line to creep down to about 2,000 feet, Powell said. Accumulations for most of western Nevada …