Fig. 1

Methodological framework diagram. The orange-shaded section displays the general workflow used to generate BAYESL-TG/EXT while the blue-shaded section shows the general workflow used to estimate the extreme sea level data from BAYESL-TG/EXT. The application of BAYES-TG uses only annual maxima skew surge data from observed hourly tide gauge sea-level records (as shown by the dashed violet line and the asterisk ‘*’).