(CNN)Storm surge and strong winds from Hurricane Ida stopped the flow of the Mississippi River near New Orleans on Sunday and actually caused it to reverse — something the US Geological Survey says is “extremely uncommon.”

Ida made landfall near Port Fourchon, Louisiana, early Sunday afternoon as an extremely dangerous Category 4 hurricane with winds of 150 mph, the National Hurricane Center (NHC) said. The hurricane arrived on the 16th anniversary of the historically devastating Hurricane Katrina.Hurricane Ida makes landfall in LouisianaHurricane Ida makes landfall in LouisianaHurricane Ida makes landfall in Louisiana“I remember, off hand, that there was some flow reversal of the Mississippi River during Hurricane Katrina, but it is extremely uncommon,” Scott Perrien, a supervising hydrologist with the USGS Lower Mississippi Gulf Water Science Center in Baton Rouge, Louisiana, told CNN.Perrien noted that the river level on Sunday rose about 7 feet due to storm surge pushing up the river at the USGS gauge, located in Belle Chasse, about 20 miles south of New Orleans in southeastern Louisiana.”During that time, the flow of the river slowed from about 2 feet per second down to about half a foot per second in the other direction,” Perrien said.Read MoreThe Mississippi River at New Orleans ahead of Ida's arrival.The Mississippi River at New Orleans ahead of Ida's arrival.The Mississippi River at New Orleans ahead of Ida’s arrival.Perrien pointed out that the gauge does not measure the flow of the entire river, so it is possible that the deeper portions of the river did not reverse flow directions.”The river is feeling the effects of the storm over a large area,” Perrien told CNN. “All the way up to Baton Rouge the river has risen 1.5 feet in the past 12 hours as the surge pushes up the river. And the water level will likely rise more in the coming hours here in Baton Rouge.”Ida became a Category 4 storm early Sunday morning and has tied as Louisiana’s most powerful storm ever with 2020’s Laura and the Last Island Hurricane of 1856 — all with top winds of 150 mph.In pictures: Hurricane Ida lashes Gulf CoastIn pictures: Hurricane Ida lashes Gulf Coast Photos: Hurricane Ida lashes Gulf CoastThe Royal Dutch Shell refinery in Norco, Louisiana, is seen as Hurricane Ida makes landfall Sunday, August 29. More than 95% of the Gulf of Mexico's oil production facilities have been shut down, regulators said, indicating the storm's <a href="https://www.cnn.com/2021/08/29/business/hurricane-ida-oil-industry-disruption/index.html" target="_blank">significant impact on energy supply.</a>The Royal Dutch Shell refinery in Norco, Louisiana, is seen as Hurricane Ida makes landfall Sunday, August 29. More than 95% of the Gulf of Mexico's oil production facilities have been shut down, regulators said, indicating the storm's <a href="https://www.cnn.com/2021/08/29/business/hurricane-ida-oil-industry-disruption/index.html" target="_blank">significant impact on energy supply.</a> Photos: Hurricane Ida lashes Gulf CoastThe Royal Dutch Shell refinery in Norco, Louisiana, is seen as Hurricane Ida makes landfall Sunday, August 29. More than 95% of the Gulf of Mexico’s oil production facilities have been shut down, regulators said, indicating the storm’s significant impact on energy supply.Hide Caption 1 of 33European Space Agency astronaut Thomas Pesquet took this photo of Hurricane Ida from the International Space Station on Sunday.European Space Agency astronaut Thomas Pesquet took this photo of Hurricane Ida from the International Space Station on Sunday. Photos: Hurricane Ida lashes Gulf CoastEuropean Space Agency astronaut Thomas Pesquet took this photo of Hurricane Ida from the International Space Station on Sunday.Hide Caption 2 of 33A man passes by a section of roof that was blown off a building in the French Quarter of New Orleans on Sunday.A man passes by a section of roof that was blown off a building in the French Quarter of New Orleans on Sunday. Photos: Hurricane Ida lashes Gulf CoastA man passes by a section of roof that was blown off a building in the French Quarter of New Orleans on Sunday.Hide Caption 3 of 33People work inside the Federal Emergency Management Agency's headquarters in Washington, DC, on Sunday.People work inside the Federal Emergency Management Agency's headquarters in Washington, DC, on Sunday. Photos: Hurricane Ida lashes Gulf CoastPeople work inside the Federal Emergency Management Agency’s headquarters in Washington, DC, on Sunday.Hide Caption 4 of 33People walk through the French Quarter in New Orleans on Sunday.People walk through the French Quarter in New Orleans on Sunday. Photos: Hurricane Ida lashes Gulf CoastPeople walk through the French Quarter in New Orleans on Sunday.Hide Caption 5 of 33Firefighters look out the window of a shelter in Bourg, Louisiana, as the storm passes on Sunday.Firefighters look out the window of a shelter in Bourg, Louisiana, as the storm passes on Sunday. Photos: Hurricane Ida lashes Gulf CoastFirefighters look out the window of a shelter in Bourg, Louisiana, as the storm passes on Sunday.Hide Caption 6 of 33Storm clouds pass over a cemetery in New Orleans on Sunday.Storm clouds pass over a cemetery in New Orleans on Sunday. Photos: Hurricane Ida lashes Gulf CoastStorm clouds pass over a cemetery in New Orleans on Sunday.Hide Caption 7 of 33LaKeisha Verdin holds her 3-month-old son, Kevin, as she walks onto the front porch where her family was watching weather updates on the local news Sunday in Houma, Louisiana.LaKeisha Verdin holds her 3-month-old son, Kevin, as she walks onto the front porch where her family was watching weather updates on the local news Sunday in Houma, Louisiana. Photos: Hurricane Ida lashes Gulf CoastLaKeisha Verdin holds her 3-month-old son, Kevin, as she walks onto the front porch where her family was watching weather updates on the local news Sunday in Houma, Louisiana.Hide Caption 8 of 33A news crew reports from the edge of Lake Pontchartrain in New Orleans on Sunday.A news crew reports from the edge of Lake Pontchartrain in New Orleans on Sunday. Photos: Hurricane Ida lashes Gulf CoastA news crew reports from the edge of Lake Pontchartrain in New Orleans on Sunday.Hide Caption 9 of 33Wind blows Monroe Best's hair and face mask in New Orleans on Sunday.Wind blows Monroe Best's hair and face mask in New Orleans on Sunday. Photos: Hurricane Ida lashes Gulf CoastWind blows Monroe Best’s hair and face mask in New Orleans on Sunday.Hide Caption 10 of 33Bourbon Street in New Orleans is nearly empty on Sunday.Bourbon Street in New Orleans is nearly empty on Sunday. Photos: Hurricane Ida lashes Gulf CoastBourbon Street in New Orleans is nearly empty on Sunday.Hide Caption 11 of 33A vehicle is abandoned in a flooded ditch next to the highway Sunday in Bay Saint Louis, Mississippi.A vehicle is abandoned in a flooded ditch next to the highway Sunday in Bay Saint Louis, Mississippi. Photos: Hurricane Ida lashes Gulf CoastA vehicle is abandoned in a flooded ditch next to the highway Sunday in Bay Saint Louis, Mississippi.Hide Caption 12 of 33A man carrying his belongings walks past a sign outside the Ernest N. Morial Convention Center in New Orleans on Sunday.A man carrying his belongings walks past a sign outside the Ernest N. Morial Convention Center in New Orleans on Sunday. Photos: Hurricane Ida lashes Gulf CoastA man carrying his belongings walks past a sign outside the Ernest N. Morial Convention Center in New Orleans on Sunday.Hide Caption 13 of 33A wall of rain moves over downtown New Orleans on Sunday.A wall of rain moves over downtown New Orleans on Sunday. Photos: Hurricane Ida lashes Gulf CoastA wall of rain moves over downtown New Orleans on Sunday.Hide Caption 14 of 33The Boudreaux family sits on their front porch as they await the arrival of Hurricane Ida on Sunday.The Boudreaux family sits on their front porch as they await the arrival of Hurricane Ida on Sunday. Photos: Hurricane Ida lashes Gulf CoastThe Boudreaux family sits on their front porch as they await the arrival of Hurricane Ida on Sunday.Hide Caption 15 of 33A man walks along the Mississippi River near the French Quarter in New Orleans early Sunday.A man walks along the Mississippi River near the French Quarter in New Orleans early Sunday. Photos: Hurricane Ida lashes Gulf CoastA man walks along the Mississippi River near the French Quarter in New Orleans early Sunday.Hide Caption 16 of 33People stand in line at Louis Armstrong New Orleans International Airport on Saturday, August 28. Many residents were evacuating the area ahead of Hurricane Ida.People stand in line at Louis Armstrong New Orleans International Airport on Saturday, August 28. Many residents were evacuating the area ahead of Hurricane Ida. Photos: Hurricane Ida lashes Gulf CoastPeople stand in line at Louis Armstrong New Orleans International Airport on Saturday, August 28. Many residents were evacuating the area ahead of Hurricane Ida.Hide Caption 17 of 33Crews reopen a flood gate to help trapped motorists who missed a closure deadline on Saturday.Crews reopen a flood gate to help trapped motorists who missed a closure deadline on Saturday. Photos: Hurricane Ida lashes Gulf CoastCrews reopen a flood gate to help trapped motorists who missed a closure deadline on Saturday.Hide Caption 18 of 33Keith Clark brings a rope to a friend to help tie down a houseboat before he evacuates Jean Lafitte, Louisiana, on Saturday.Keith Clark brings a rope to a friend to help tie down a houseboat before he evacuates Jean Lafitte, Louisiana, on Saturday. Photos: Hurricane Ida lashes Gulf CoastKeith Clark brings a rope to a friend to help tie down a houseboat before he evacuates Jean Lafitte, Louisiana, on Saturday.Hide Caption 19 of 33Nikeia Washington from Vacherie, Louisiana, holds her granddaughter, Halia Zenon, at a hotel in downtown Shreveport, Louisiana, where they evacuated to ahead of the storm.Nikeia Washington from Vacherie, Louisiana, holds her granddaughter, Halia Zenon, at a hotel in downtown Shreveport, Louisiana, where they evacuated to ahead of the storm. Photos: Hurricane Ida lashes Gulf CoastNikeia Washington from Vacherie, Louisiana, holds her granddaughter, Halia Zenon, at a hotel in downtown Shreveport, Louisiana, where they evacuated to ahead of the storm.Hide Caption 20 of 33People walk down Bourbon Street in New Orleans on Saturday. <a href="https://www.cnn.com/2021/08/27/us/new-orleans-hurricane-ida-preparations/index.html" target="_blank">Evacuation was voluntary</a> for parts of the city inside its flood protection system. Other areas were under a mandatory evacuation order.People walk down Bourbon Street in New Orleans on Saturday. <a href="https://www.cnn.com/2021/08/27/us/new-orleans-hurricane-ida-preparations/index.html" target="_blank">Evacuation was voluntary</a> for parts of the city inside its flood protection system. Other areas were under a mandatory evacuation order. Photos: Hurricane Ida lashes Gulf CoastPeople walk down Bourbon Street in New Orleans on Saturday. Evacuation was voluntary for parts of the city inside its flood protection system. Other areas were under a mandatory evacuation order.Hide Caption 21 of 33Larry Ackman, bottom, helps neighbor Mike Jackson, left, and his son Cody board up windows Saturday in Morgan City, Louisiana.Larry Ackman, bottom, helps neighbor Mike Jackson, left, and his son Cody board up windows Saturday in Morgan City, Louisiana. Photos: Hurricane Ida lashes Gulf CoastLarry Ackman, bottom, helps neighbor Mike Jackson, left, and his son Cody board up windows Saturday in Morgan City, Louisiana.Hide Caption 22 of 33Traffic moves slowly along I-10 West in Vinton, Louisiana, as residents evacuate toward Texas on Saturday.Traffic moves slowly along I-10 West in Vinton, Louisiana, as residents evacuate toward Texas on Saturday. Photos: Hurricane Ida lashes Gulf CoastTraffic moves slowly along I-10 West in Vinton, Louisiana, as residents evacuate toward Texas on Saturday.Hide Caption 23 of 33A man drives a tractor through a flooded street Saturday in Guanimar, Cuba. Before entering the Gulf, Ida made landfall twice over Cuba as a Category 1 hurricane.A man drives a tractor through a flooded street Saturday in Guanimar, Cuba. Before entering the Gulf, Ida made landfall twice over Cuba as a Category 1 hurricane. Photos: Hurricane Ida lashes Gulf CoastA man drives a tractor through a flooded street Saturday in Guanimar, Cuba. Before entering the Gulf, Ida made landfall twice over Cuba as a Category 1 hurricane.Hide Caption 24 of 33President Joe Biden speaks during a FEMA briefing on Hurricane Ida on Saturday. "This weekend is the anniversary of Hurricane Katrina," Biden said, "and it's a stark reminder that we have to do everything we can to prepare the people in the region to make sure we're ready to respond."President Joe Biden speaks during a FEMA briefing on Hurricane Ida on Saturday. "This weekend is the anniversary of Hurricane Katrina," Biden said, "and it's a stark reminder that we have to do everything we can to prepare the people in the region to make sure we're ready to respond." Photos: Hurricane Ida lashes Gulf CoastPresident Joe Biden speaks during a FEMA briefing on Hurricane Ida on Saturday. “This weekend is the anniversary of Hurricane Katrina,” Biden said, “and it’s a stark reminder that we have to do everything we can to prepare the people in the region to make sure we’re ready to respond.”Hide Caption 25 of 33Dawn breaks over a Hurricane Katrina memorial at Shell Beach in St. Bernard, Louisiana, on Saturday. <a href="https://www.cnn.com/2020/08/29/us/gallery/hurricane-katrina/index.html" target="_blank">Katrina made landfall</a> on August 29, 2005.Dawn breaks over a Hurricane Katrina memorial at Shell Beach in St. Bernard, Louisiana, on Saturday. <a href="https://www.cnn.com/2020/08/29/us/gallery/hurricane-katrina/index.html" target="_blank">Katrina made landfall</a> on August 29, 2005. Photos: Hurricane Ida lashes Gulf CoastDawn breaks over a Hurricane Katrina memorial at Shell Beach in St. Bernard, Louisiana, on Saturday. Katrina made landfall on August 29, 2005.Hide Caption 26 of 33Clare and Joe Cermak work on putting storm shutters up on their home in Louisiana's St. Charles Parish on Saturday.Clare and Joe Cermak work on putting storm shutters up on their home in Louisiana's St. Charles Parish on Saturday. Photos: Hurricane Ida lashes Gulf CoastClare and Joe Cermak work on putting storm shutters up on their home in Louisiana’s St. Charles Parish on Saturday.Hide Caption 27 of 33Highway traffic moves slowly overnight Saturday near Kenner, Louisiana, as many residents evacuate ahead of Hurricane Ida.Highway traffic moves slowly overnight Saturday near Kenner, Louisiana, as many residents evacuate ahead of Hurricane Ida. Photos: Hurricane Ida lashes Gulf CoastHighway traffic moves slowly overnight Saturday near Kenner, Louisiana, as many residents evacuate ahead of Hurricane Ida.Hide Caption 28 of 33Gregory Moore, left, helps fill sand bags as residents in Gulfport, Mississippi, prepare for the storm on Saturday.Gregory Moore, left, helps fill sand bags as residents in Gulfport, Mississippi, prepare for the storm on Saturday. Photos: Hurricane Ida lashes Gulf CoastGregory Moore, left, helps fill sand bags as residents in Gulfport, Mississippi, prepare for the storm on Saturday.Hide Caption 29 of 33John Guenther unloads about 400 crab traps that he had to pull out of the water and move via flatbed trailer to dry near his home in the eastern St. Bernard Parish on Friday, August 27.John Guenther unloads about 400 crab traps that he had to pull out of the water and move via flatbed trailer to dry near his home in the eastern St. Bernard Parish on Friday, August 27. Photos: Hurricane Ida lashes Gulf CoastJohn Guenther unloads about 400 crab traps that he had to pull out of the water and move via flatbed trailer to dry near his home in the eastern St. Bernard Parish on Friday, August 27.Hide Caption 30 of 33Jennifer Tate fuels up a gas can in Pass Christian, Mississippi, on Friday.Jennifer Tate fuels up a gas can in Pass Christian, Mississippi, on Friday. Photos: Hurricane Ida lashes Gulf CoastJennifer Tate fuels up a gas can in Pass Christian, Mississippi, on Friday.Hide Caption 31 of 33Workers stack bags of ice into a gas station freezer on Friday in Jefferson, Louisiana.Workers stack bags of ice into a gas station freezer on Friday in Jefferson, Louisiana. Photos: Hurricane Ida lashes Gulf CoastWorkers stack bags of ice into a gas station freezer on Friday in Jefferson, Louisiana.Hide Caption 32 of 33A resident hammers the shutters of a 100-year-old house in New Orleans on Friday.A resident hammers the shutters of a 100-year-old house in New Orleans on Friday. Photos: Hurricane Ida lashes Gulf CoastA resident hammers the shutters of a 100-year-old house in New Orleans on Friday.Hide Caption 33 of 3318 hurricane ida 0829 norco refinery20 hurricane ida 082911 hurricane ida 0829 new orleans19 hurricane ida 0829 fema hq16b hurricane ida 0829 new orleans12 hurricane ida 0829 bourg louisiana17 hurricane ida 0829 new orleans08 hurricane ida 0829 houma07 hurricane ida 0829 new orleans04 hurricane ida 0829 new orleansBPT107 Hurricane Ida RESTRICTED 08292113 hurricane ida 0829 mississippi03 hurricane ida 0829BPT105 Hurricane Ida RESTRICTED 08302105 hurricane ida 0829 new orleansBPT104 Hurrican Ida 08302124 hurricane ida 0828 louisiana02 hurricane ida 082918 hurricane ida 082817 hurricane ida 0828BPT106 Hurricane Ida 08302120 hurricane ida 082825 hurricane ida 082819 hurricane ida 082815 hurriicane ida 082810 hurricane ida 082815 hurricane ida 082812 hurricane ida 082814 hurricane ida 082811 hurricane ida 082808b hurricane ida prep 0827 mississippi02 hurricane ida prep 0827 Louisiana 03 hurricane ida prep 0827 Louisiana During Hurricane Laura, strong winds blew the top layer of the Mississippi River upriver away from the Gulf and slowed the river’s main current.Hurricane Ida’s landfall comes on the anniversary of Hurricane Katrina, which hit Louisiana in 2005 as a Category 3 storm with 125 mph sustained winds. Storm surge with Katrina measured up to 24-28 feet, according to the NHC.By comparison, Hurricane Ida is forecast to bring a lower storm surge of 12-16 feet to some areas of southeast Louisiana, the NHC says. And near New Orleans it’s expected to be even lower: 8-12 feet outside New Orleans and 5-8 feet along Lake Pontchartrain.That’s because the wind field was larger for Katrina: 90 miles from center at landfall, compared to 50 miles for Ida.

Source Link:
https://www.cnn.com/2021/08/29/weather/mississippi-river-hurricane-ida/index.html

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