Chehalis River - Preachers Slough Entrance UV IndexUnited StatesWAGrays Harbor CountyChehalis River - Preachers Slough Entrance1-Day3-Day Graph Plots Open in Graphs UV Forecast NOAAChehalis River - Preachers Slough Entrance UV forecast issued yesterday at 11:18 am. Next forecast at approx. 11:18 am. UV IndexGet WillyWeather+ to remove ads