The National Weather Service office in Fort Worth is upgrading the Winter Storm Warning to an Ice Storm Warning for the western half of the Metroplex including Fort Worth for tomorrow into early Thursday. The potential exists for severe icing on top of the already 1/2 inch of sleet or so. There could be an additional 1/2 inch of ice accretion from moderate to heavy freezing rain tomorrow. This would make travel nearly impossible and hamper the improvement of roadways in this area until late Thursday or early Friday. This amount of ice could potentially cause widespread power outages, especially in areas that have above ground power lines. The weight of the ice can bring them down, and also bring down tree limbs that fall on the power lines. Travel in Tarrant, Parker, Hood, Denton, Johnson, and Wise counties is strongly discouraged.