The greatest storm surge from Ida pushed ashore just east of the center, from Port Fourchon to the mouth of the Mississippi River and northward to the Mississippi border. As a result, the overall storm surge threat from Ida was far less than that from Hurricane Katrina (see note above on integrated kinetic energy). CDT Sunday, just 11 hours before landfall. Ida’s wind field did not expand dramatically until late Saturday, and it was not classified as a major hurricane until 1 a.m. Such hurricanes can maintain a massive and destructive surge even if they weaken before landfall, as happened with Katrina in 2005 and Sandy in 2012. The most destructive hurricanes for storm surge tend to be both intense and large, as these storms can push vast amounts of water. kR4oxH9qrf- Sam Lillo AugA concentrated storm surge threat Ida and Katrina, two devastating major hurricanes, 16 years and just a few miles apart. However, Ida’s wind damage and fresh water flooding damage will likely exceed that of Katrina – particularly since Ida is hitting a key area of U.S infrastructure. Thus, Katrina’s surge had a lot more destructive power than Ida’s. For comparison, Hurricane Katrina’s IKE at landfall was 113 TJ. EDT Sunday, an increase of 64% from the 22 TJ it had 24 hours previously. This is overall a bad thing for Louisiana, as it will result in more wind damage.Īccording to Brian McNoldy, Ida’s Integrated Kinetic Energy (IKE, a measure of the total destructive power of a hurricane, based on the size of its wind field) was 36 terajoules (TJ) at 11 a.m. The ERC kept the winds at the core from increasing further, but greatly broadened the area experiencing hurricane-force winds. 8EvrETJVt6- Philip Klotzbach August 29, 2021Īt landfall, Ida was undergoing an eyewall replacement cycle (ERC), which halted intensification just before landfall, causing the pressure to rise from 929 mb to 930 mb. Only 2 other #hurricanes on record (pressure consistently recorded since 1979), have had 40+ hPa pressure falls in Gulf of Mexico in 12 hr: Allen (1980) and Rita (2005). The most recent Atlantic hurricane season with two or more major hurricanes by August – the year of Katrina.Īccording to National #Hurricane Center operational best track, #Ida's central pressure fell 40 hPa in 12 hr. Ida is the second major hurricane of the 2021 season Grace also became a major hurricane earlier this month as it hit Mexico. Only Hurricane Katrina of 2005, with a 920 mb pressure at landfall near Buras, had a lower pressure. As measured by central pressure at landfall, Ida ranks as the ninth-strongest to hit the contiguous U.S., and second-strongest to hit Louisiana. with stronger winds than Ida, and Ida is tied with Laura of 2020 and the 1856 Last Island Hurricane as the strongest ever to hit Louisiana. Only four hurricanes (all Cat 5s) have made landfall in the contiguous U.S. Updates: #LAwx #MSwx #idahurricane #Ida /lhwYUy4DtN- NOAA Satellites – Public Affairs August 29, 2021 ![]() 4 #hurricane, nearing the coast of southeastern #Louisiana. EYE OF A MONSTER: #GOES16□️gives an up-close look at the lightning swirling around the eye of #HurricaneIda, a dangerous Cat.
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