tide

Wikiprogress ProgBlog: Fighting the tide Fighting the tide Preparing for the water-related impacts of climate change…

Workers clean oil from the rocks following a spill in Port Arthur, Texas in January 2010. In 1976, the tanker Argo Merchant grounded near Nantucket Shoals in Massachusetts. When…

Cartilage tissue generated from pluripotent stem cells. Credit: Michael Goderre, Children's Hospital Boston About 1 in 7 adults live with…

The event will open with a fireside chat featuring Nobel Laureate Joe Stiglitz. Rethink Trade, Columbia Center on Sustainable Investment (CCSI) and Georgetown Law’s Center for Center for the Advancement of the Rule of Law in the…

The event will open with a fireside chat featuring Nobel Laureate Joe Stiglitz. Rethink Trade, Columbia Center on Sustainable Investment (CCSI) and Georgetown Law’s Center for Center for the Advancement of the Rule of Law in the Americas…

In the ongoing human experience of flood disasters, flood losses and changing conditions,2023 will go down in history as the dawn of a groundbreaking, fundamentally important shift in what it means to be flood resistant. This “new…

In this video message, NOS Assistant Administrator Nicole LeBoeuf shares a major advancement in NOAA’s capability to predict high tide flooding that is available for public use. Learn more…

On September 17, 2023, the National Geodetic Survey began collecting aerial damage assessment images in the aftermath of Hurricane Lee. Imagery was collected in specific areas by NOAA aircraft, identified by NOAA in coordination with…

Community planners and decision makers now have an application guide to help them plan for the significant sea level rise the United States is expected to see in the next 30 years. The guide is a response to the Interagency Sea Level…

On September 29, the National Geodetic Survey (NGS) began collecting aerial damage assessment images in the aftermath of Hurricane Ian. Imagery is being collected in specific areas by NOAA aircraft, identified by…

On August 22, NOAA will release the 2023 Annual High Tide Flooding Outlook for the U.S. and a new monthly tool that will predict where high tide flooding might occur for each day of the year.  The annual outlook provides…

Sea level rise is turning nuisance flooding into a “sunny day” event — high-tide flooding that occurs even without a storm. Credit: NOAA 14 December, 2022 In 2023, NOAA…

The 2023 Annual High Tide Flooding Outlook documents high tide flooding events from May 2022 to April 2023 at 98 NOAA tide gauges along the U.S. coast. It also provides a flooding outlook for these 98 locations through April 2024 and…

From August 31 - September 2, 2023, the National Geodetic Survey collected aerial damage assessment images in the aftermath of Hurricane Idalia. Imagery was collected in specific areas by NOAA aircraft, identified by NOAA in…

Users of NOS’s coastal, ocean, and Great Lakes models and information have a wide variety of needs for predictive information about our ocean and coasts. Meeting these needs demands a collection of models that…

In this video message, NOS Assistant Administrator Nicole LeBoeuf shares a major advancement in NOAA’s capability to predict high tide flooding that is available for public use. Learn more…

National Centers for Coastal Ocean Science researchers and their partners have discovered that a sunscreen chemical commonly used in many soaps, cosmetics, and body fragrances is highly toxic to corals. The team's data show that even…

A new study from a team of international scientists finds that a common chemical in many sunscreen lotions and cosmetics is highly toxic to juvenile corals and other marine life. Oxybenzone, or BP-3, is found in more than 3,500 skin…

The rising and falling of the sea is a phenomenon upon which we can always depend. Caused by the gravitational pull of the moon and the sun, tides are very long-period waves that move through the ocean and progress toward the…

Northeast outlook Includes Maine, New Hampshire, Massachusetts, Connecticut, and New York When will the tides be higher than normal? March 20 - 23 April 18 - 21 May…

There are some factors that cause the tides to be higher than what is "normally" seen from day to day. View our bulletin to see when you may experience higher than normal high tides for the period of time between June and August 2022.…

When large tracts of land are plowed, the exposed soil can erode during rainstorms. Much of this runoff flows to the sea, carrying with it agricultural fertilizers and pesticides.…

Harmful algal blooms, or HABs, occur when colonies of algae—simple ocean plants that live in the sea—grow out of control while producing toxic or harmful effects on people, fish, shellfish, marine mammals and birds. The human…

The report, 2018 State of High Tide Flooding and 2019 Outlook, documents changes in high tide flooding patterns at 98 NOAA tidal gauges along the U.S. coast that are likely to continue in the coming years.  High tide flooding, often…

Tides are driven by the gravitational force of the moon and sun. Tides are characterized by water moving up and down over a long period of time. When used in association with water, the term "current" describes the motion of…

Tides are very long-period waves that move through the oceans in response to the forces exerted by the moon and sun. Tides originate in the oceans and progress toward the coastlines where they appear as the regular rise and fall of the…

The highest tides in the world can be found in Canada's Bay of Fundy at Burntcoat Head in Nova Scotia. Image credit: Shawn M. Kent. …

Tide predictions are available for locations on the U.S. coastline, most of the islands in the Caribbean, and many islands in the Pacific Ocean. The image above shows tide predictions for…

My name is William Sweet and, besides being an avid Chesapeake Bay sailor, I am also an oceanographer with the National Ocean Service's (NOS) Center for Operational Oceanographic Products and Services. I joined NOAA right before the…

A lunar day is how long it takes for one point on the Earth to make one complete rotation and end up at the same point in relation to the moon. The reason that a lunar day is longer than a normal 24-hour day is because the moon…

D-Day, codenamed Operation Neptune, was the largest amphibious landing not only in World War II, but in history. It marked the start of the liberation of German-occupied France (and later western Europe) and laid the foundations of…

The rise and fall of the tides play an important role in the natural world and can have a marked effect on maritime-related activities. The image aboves shows the NOAA San Francisco Tide…

Waterspouts fall into two categories: fair weather waterspouts and tornadic waterspouts.

View of the Holland, Michigan water level and meteorological station, located at the entrance to Macatawa Bay. Historic water level data has been collected in this vicinity since 1894.…

Often between 6-8 times a year, the new or full moon coincides closely in time with the perigee of the moon — the point when the moon is closest to the Earth. These occurrences are often called 'perigean spring tides.'…

When the tide comes in from the Bay of Fundy, located off the Atlantic Coast between the State of Maine and the Province of New Brunswick, a tremendous amount of ocean water, called a current, flows swiftly into a confined area called…

Storm surge is the abnormal rise in seawater level during a storm, measured as the height of the water above the predicted astronomical tide. The surge is caused primarily by a storm’s winds pushing water onshore. The amplitude of the…

A spring tide is a common historical term that has nothing to do with the season of spring. Rather, the term is derived from the concept of the tide "springing forth." Spring tides occur…

This animation shows a standing wave (black) depicted as a sum of two propagating waves traveling in opposite directions (blue and red). Similar in motion to a seesaw, a seiche is a standing wave in which the largest…

On the first half, Cea Higgins of Sonoma Coast Surfrider talks about the proposal by the state of CA to install fee collections stations at currently free Sonoma Coast beaches. On the 2nd half of the show Lisa Boyle of 5 Gyres Institute…

This image shows daily tide predictions for Eastport, Maine, for January-February 1867. This page is from the first edition of a national annual tide table publication created in 1866 by the…

<!-- What is a King Tide? …

A King Tide is a non-scientific term people often use to describe exceptionally high tides. Tides are long-period waves that roll around the planet as the ocean is "pulled" back and forth by the gravitational pull of…

<!-- What is a tide gauge? …

The rise and fall of the tides play an important role in the natural world and can have a marked effect on maritime-related activities. The image aboves shows the NOAA San…

Stormy weather over the ocean can sometimes fuel the development of meteotsunamis, a series of waves typically much smaller and less destructive than those associated with seismically generated…

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…

Impacts of tidal flooding to one coastal community. Tidal flooding is on the rise, but communities can start planning now to lessen its negative impacts. Click on the image to view the video…

The Tide Rises, the Tide Falls NOAA and its predecessor agencies have been producing tide tables since 1867. Tide tables are produced annually and come out in October. …