What is Mean Higher High Water?
You might have bumped into this term while trying to find out when you’ll experience high tide where you live. Many coastal places actually have two high tides a day. Mean Higher High Water (MHHW) is the average of the higher of the two daily high tides. The term MHHW is more precise than “high tide,” and it helps specialists in the field communicate clearly about the tides they track. Problematic flooding can happen when water levels climb even a bit higher than normal variations in MHHW at a particular location. This is commonly called high tide flooding, and it can inundate roads, compromise stormwater systems, and damage coastal property.