High-tide flooding continues to increase, according to new outlook from NOAA

  • A new outlook from NOAA predicts high tide flooding over the next year.
  • Two places had record days of flooding at high tide last year.
  • High tide flooding is also referred to as “nuisance” flooding or “sunny weather flooding”.

High tide flood events fueled by rising sea levels along the country’s coastlines continue to become more frequent and will increase even more in coming years, according to the latest annual high tide flood outlook. of the National Oceanic and Atmospheric Administration.

Here are some highlights from the NOAA report.

The sea level rises increase the rate of coastal flooding caused by high tides, also known as “nuisance flooding” or “sunny weather flooding”. This happens on days without thunderstorms, heavy rains or other major weather factors.

Scientists say sea ​​level rise is fueled by ocean warming and higher atmospheric temperatures that cause ocean water to expand and melt glaciers and ice caps. Global warming caused by greenhouse gas emissions lead to higher temperatures.

In the next 12 months, some areas around New York are expected to experience between five and 15 days of flooding at high tide. That compares to about nine days over the past year. Coasts along the northern Gulf of Mexico could see between five and 20 days, while parts of Washington state could see up to 16 days.

A record number high tide flood days occurred in two locations in the United States last year: tip of the reedsDelaware, lives six days and Springmaid Pier near Myrtle Beach, South Carolina, tied its 2021 record with 11 days.

Record flooding at high tide is not expected globally for the rest of this year since the Earth is in a farthest position from the moon. Royal Tidesthe high tides which occur a few times a year during the full moon can nevertheless cause flooding.

This reprieve is only temporary. By 2050, high tide flooding is expected to occur approximately 45 to 50 days per year on average at the national level. This compares to the three to seven day forecast for next year. The number varies greatly by location. Sandy Hook, New Jersey, for example, could see up to 120 days and Galveston, Texas could see up to 210 days by 2050.

East Coast and Gulf States are already seeing 150% more flooding at high tide than just two decades ago. Locally, some numbers are even higher.

There is good news for the West Coast of the United States, Hawaii and the Pacific Islands of the United States – at least for this year. Persistence the girl weather patterns influence coastal storm tracks and help moderate ocean temperatures and sea level heights. This means fewer days of high tide flooding are expected for these areas in the coming months.

Want to know more? Check these links:

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FORT LAUDERDALE, FL - SEPTEMBER 30: An apartment for rent sign is seen in a flooded street caused by the combination of the lunar orbit which has caused seasonal high tides and what many believe is sea level rise due to the climate change on September 30, 2015 in Fort Lauderdale, Florida.  South Florida is expected to continue to feel the effects of climate change, and many cities have launched programs such as installing pumps or building sea walls to try to combat rising sea levels.  (Photo by Joe Raedle/Getty Images)

An apartment for rent sign is seen in a flooded street at high tide in this file photo from Fort Lauderdale, Florida.

(Joe Raedle/Getty Images)

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