Reads every day in the span from the archives — tide, wind, air and pressure at 9411340, ERA5 for sky and swell — and boils each down to one line. Gemini reads the whole span and picks its moments; then each pick is checked against its own day at full resolution and timed to the minute. A pick the day does not bear out is left unticked. A minute or two, a few dozen model calls. Saved as a new dataset under the name you give it.