sentences:  The SAB also produces graphics for Tropical Rainfall Potential forecasts for all tropical systems in the Western Hemisphere and many in the Eastern Hemisphere.Away from tropical cyclones, the SAB functions as the Washington Volcanic Ash Advisory Center, having been designated as such by the International Civil Aviation Organization in 1997.It also does snow and ice analysis, and has done so, along with its parent organizations NESDIS and SSD, since 1966.