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High Tide Flooding Products from NOAA CO-OPS

Published by Center for Operational Oceanographic Products and Services | National Oceanic and Atmospheric Administration, Department of Commerce | Metadata Last Checked: December 19, 2025 | Last Modified: 2016-01-01T00:00:00.000+00:00
High tide flooding is the overflow or excess accumulation of water that covers typically dry coastal land and occurs during high tides. As relative sea levels rise, high tide flooding (HTF) is occurring more frequently, even on sunny days. HTF creates short term impacts like road closures, overflowing storm drains, and temporary business closures. Over the long term, recurrent HTF causes more severe impacts like damage to below-ground infrastructure and degraded wetlands. Through NOAA's National Ocean Service (NOS), the Center for Operational Oceanographic Products and Services (CO-OPS) and its predecessors have gathered oceanographic data along our nation's coasts for over 200 years to protect life, property, and the environment. Serving both the public and other government agencies, CO-OPS is the authoritative source for accurate, reliable, and timely water-level and current measurements that support safe and efficient maritime commerce, sound coastal management, and recreation. As part of those roles, CO-OPS offers a suite of interactive products that helps communities understand when, where, and how often high tide flooding may occur along the coast to better inform their coastal flood planning and mitigation efforts. The suite includes a summary of historical HTF days as well as Monthly and Annual HTF Outlooks which are produced for specific stations.

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EARTH SCIENCE > CLIMATE INDICATORS > ATMOSPHERIC/OCEAN INDICATORS > COMPOUND EXTREME EVENTS EARTH SCIENCE > CLIMATE INDICATORS > ATMOSPHERIC/OCEAN INDICATORS > EXTREME WEATHER EARTH SCIENCE > LAND SURFACE > GEOMORPHIC LANDFORMS/PROCESSES > COASTAL PROCESSES > FLOODING EARTH SCIENCE > OCEANS EARTH SCIENCE > OCEANS > COASTAL PROCESSES > SEA SURFACE HEIGHT EARTH SCIENCE > OCEANS > COASTAL PROCESSES > TIDAL HEIGHT EARTH SCIENCE > OCEANS > MARINE ENVIRONMENT MONITORING EARTH SCIENCE > OCEANS > TIDES EARTH SCIENCE > OCEANS > TIDES > STORM SURGE EARTH SCIENCE > OCEANS > TIDES > TIDAL HEIGHT EARTH SCIENCE > OCEANS > TIDES > TIDAL RANGE CONTINENT > NORTH AMERICA CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > ALABAMA CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > ALASKA CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > CALIFORNIA CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > CONNECTICUT CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > DELAWARE CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > DISTRICT OF COLUMBIA CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > FLORIDA CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > GEORGIA CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > HAWAII CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > LOUISIANA CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > MAINE CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > MARYLAND CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > MASSACHUSETTS CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > MISSISSIPPI CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > NEW HAMPSHIRE CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > NEW JERSEY CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > NEW YORK CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > NORTH CAROLINA CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > OREGON CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > PENNSYLVANIA CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > RHODE ISLAND CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > SOUTH CAROLINA CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > TEXAS CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > VIRGINIA CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > WASHINGTON OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN > GULF OF AMERICA OCEAN > PACIFIC OCEAN > CENTRAL PACIFIC OCEAN > AMERICAN SAMOA OCEAN > PACIFIC OCEAN > CENTRAL PACIFIC OCEAN > HAWAIIAN ISLANDS OCEAN > PACIFIC OCEAN > CENTRAL PACIFIC OCEAN > MIDWAY ATOLL OCEAN > PACIFIC OCEAN > CENTRAL PACIFIC OCEAN > WAKE ISLAND OCEAN > PACIFIC OCEAN > WESTERN PACIFIC OCEAN > MICRONESIA > GUAM OCEAN > PACIFIC OCEAN > WESTERN PACIFIC OCEAN > MICRONESIA > MARSHALL ISLANDS ACOUSTIC SOUNDERS PRESSURE SENSORS > PRESSURE SENSORS TIDE GAUGES > TIDE GAUGES WATER LEVEL GAUGES > WATER LEVEL GAUGES GOES > NOAA Geostationary Operational Environmental Satellites Coastal Sea Level Stations NWLON > National Water Level Observation Network NWLON station PORTS > Physical Oceanographic Real-Time System coastal monitoring tides and currents water level predictions Coastal U.S. territories Coastal United States Gulf of Mexico Microwave Water Level (MWWL) Sensor DOC/NOAA/NOS/CO-OPS > Center for Operational Oceanographic Products and Services, National Ocean Service, NOAA, U.S. Department of Commerce CO-OPS Metadata Library

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