 Jason Walker. Forecasters say the outer bands of Beryl approaching the Texas coast and the weather is about to go downhill. We're expecting a dangerous storm surge, 4 to 6 feet above ground as possible from Mesquite Bay, Texas to San Luis Pass, including Matagorda Bay. We're also expecting very heavy rainfall, 5 to 10 inches of rain, localized amounts to 15. This can cause some flash flooding.