RINCON — There has been a 100 percent chance of unusual occurrences in the Effingham County School District’s 2017-18 weather forcecast.A solar eclipse in August, tropical storm in September and upwards of four inches of recent snow forced alterations to the school schedule. The snow and resulting frozen roads forced schools to close three days last week.“It’s really unbelievable when you think about it — first, for it to snow, and then, on top of that, for it to stay cold this long,” Superintendent Dr. Randy Shearouse said. Temperatures remained below freezing for a few days last week.The snow arrived on the morning of Jan 3. shortly after schools were set to open following the Christmas break.