I have a combined_vars_df and surge_df, wave_df, and waterlevel_df for 235 counties on the “Atlantic” and “GulfOfMexico” coasts. Their few lines of data information are given below. I am using dates of combined_vars_df and selecting the same dates in surge_df, wave_df and waterlevel_df, and calculating distances (using haversine package) from longitude_precip and latitude_precip to latitudes and longitudes of surge, wave and waterlevel dfs and select the nearest locations of surge, wave and waterlevel and select their corresponding percentiles and other corresponding columns to add them in combined_vars_df. I am using the following conditions for calculating distances and finding the nearest location and its corresponding percentiles: