WINTER STORM WATCH REMAINS IN EFFECT FROM FRIDAY MORNING THROUGH SATURDAY EVENING... * WHAT...Heavy mixed precipitation possible. Total snow accumulations of 3 to 6 inches, with locally higher amounts of more than 8 inches. Ice accumulations up to three tenths of an inch are possible. * WHERE...The heavier snow accumulations will mainly be across northern and western Oklahoma. The heavier ice accumulations are expected to extend from southwest Oklahoma into central Oklahoma, including Oklahoma City. * WHEN...The main effects of this storm will arrive Friday evening, and continue through Saturday. Some freezing drizzle may occur during the day on Friday over the northwest third of Oklahoma. * ADDITIONAL DETAILS...Power outages and tree damage are likely across portions of the area due to the ice. Road conditions will vary across Oklahoma and western north Texas, depending on ground temperatures and the rate of accumulation of snow and ice. Ice may accumulate on bridges and overpasses, even where main roads do not freeze.