![]() The latest conditions can be seen on the NOAA PSL Map Room webpage. Temperatures around Southern Florida are the warmest on record (going back to 1981). In the last week (as of this writing), water temperatures throughout the Gulf of Mexico and in the Caribbean Sea have been approximately 1.8-5.4˚F (1-3˚C) warmer than normal. ![]() Why is this marine heat wave in South Florida significant? Global ocean surface temperatures are also monitored daily using blended satellite measurements. ![]() The National Weather Service’s National Data Buoy Center collects and disseminates real-time quality-controlled marine observations using 1,300 weather observing stations. How are marine heat wave observations and measurements made? Marine heat wave conditions are monitored by NOAA’s Physical Sciences Laboratory (PSL) and NOAA Coral Reef Watch. Marine heat waves can last for weeks, months or years. This means that the temperatures are warmer than 90% of the previous observations for a given time of year. Marine heat waves are usually defined as any time the ocean temperature is above the 90 th percentile for a specific length of time. NOAA has also been monitoring a large marine heat wave in the Northeast Pacific (in the Gulf of Alaska) that has been sitting offshore since late 2022.Īs we gather more data about these events, NOAA scientists are providing answers to big questions about marine heat waves: coast, along the path of the Gulf Stream. More isolated marine heat wave conditions have been detected off the Northeast U.S. NOAA scientists have tracked a steady climb in ocean temperatures since April 2023, which is causing unprecedented heat stress conditions in the Caribbean Basin, including waters surrounding Florida and in the Gulf of Mexico.
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