Please note: In many cases, the station position in our database is accurate
to only one minute. Thus, the tide gauge may not appear to be on the coast.
Many stations on the Gulf coast have large values for September 1961.
Documentation added 2011-11-23
Using information from the NOAA website the RLR diagram has been revised. Previous Primary benchmark BM 4 2.667m above the gauge datum no longer appears on the NOAA report. Current Primary benchmark 6520 D 1991 is 2.850m above gauge datum.