https://thredds.rda.ucar.edu/thredds/ncss/grid/files/g/d316000/20thC/synop/sl/1990/1990.20thC.sl.0618.nc?north=90.000&west=-180.000&east=180.000&south=-90.000&horizStride=1&time_start=1990-06-01T18:00:00Z&time_end=1990-06-30T18:00:00Z&&&accept=netcdf3