A weak upper level disturbance will contribute to isolated showers and thunderstorms Friday over the Coastal Bend. Drier Saturday. A strong upper level low pressure system is expected to move across the Southern Plains and northern Texas Saturday night through early Sunday. In response, a frontal boundary will move across South Texas Saturday night. Much drier, windy and cooler conditions Sunday. Critical to Extreme Fire Weather conditions expected Sunday late morning through afternoon over South Texas. Gale force wind expected over the Coastal Waters Sunday. Storm force wind may occur over the Offshore Coastal Waters. Dry with weaker winds Monday. Increasing onshore flow expected Tuesday as another upper disturbance enters the Southern Plains from the west.