  A model coupling waves and currents is set up for Galway Bay, Ireland, using
COAWST. The impact of the coupling on the accuracy of the model is shown to be
marginal on the overall statistics. The model is in good agreement with the
available in-situ observations that are used for the validation. However a
closer look at the data during storms shows a deterioration of the agreement,
which is barely improved by the coupling. A special analysis of the different
processes ruling the ocean circulation and wave propagation is conducted during
Storm Hector (2018/06/14). It shows a strong wave-induced surge by 7cm in the
back of Galway Bay, and a strong response in terms of currents along the coast
of Clare of about 30cm/s. Most of the surge is attributed to the impact of the
conservative wave-induced forcing terms, but the main process involved is not
identified. The response in currents is partly attributed to the conservative
wave-induced forcing terms, but mostly to the wave-enhanced surface roughness.
