a Representation of flood frequency for 83 tidal gauge stations along the Atlantic and Gulf coasts of the United States. Each row is a different gauge and dots show days when maximum tide height exceeded minor flood stage for that gauge. Gauges are ordered geographically from north to south along the Atlantic coast, and then east to west along the Gulf coast. Colors show the state of each gauge. b Average number of days per month with maximum tide height exceding minor flooding threshold for the 83 gauges shown in a. The line shows a loess regression through the data with 95% confidence interval.