NOS Coast Survey Development Laboratory will run a wind wave prediction model for the Chesapeake Bay and compare its wave nowcasts to observations from the ADCP and buoy.  The wave model is the NOAA/Great Lakes Environmental Research Laboratory (GLERL)-Donelan Wave (GDW) Model.  GDWM is a two-dimensional parametric, dynamical model of wind-growth, propagation, and decay. The implementation of GDW model at NOS is called the 'CBWAVES' wave forecast system.  CBWAVES forecast system generates hourly, high-resolution wind wave nowcasts of significant wave heights and wave direction for the entire bay (Figure 1). It does not take into account swell. CBWAVES is driven by surface wind analyses from CSDL's implementation of the NOAA's Local Analysis and Prediction System, an atmospheric analysis system that uses surface observations from a variety of traditional observing platforms as well as local mesonets. CBLAPS was implemented in cooperation with the National Weather Service's Baltimore/Washington Forecast Office in Sterling, VA and NOAA's Forecast System Laboratory in Boulder, CO.  The wind wave nowcasts are usually available approximately 45 minutes past the top of the hour.