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Mon Aug 30, 2021, 12:25 PM

Hurricane Ida was so powerful it reversed the flow of the Mississippi River

As Hurricane Ida roared ashore in Louisiana on Sunday, the storm's force was so strong it temporarily reversed the flow of the Mississippi River.

Ida's winds snapped trees and tore roofs off buildings as its floodwaters blocked roads and submerged cars. The Category 4 storm was expected to dump up to 2 feet of rain in some areas and bring up to 7 feet of storm surge. More than 1 million people in Louisiana were without power.

A U.S. Geological Survey gauge at Belle Chasse, south of New Orleans, detected the Mississippi's flow moving backward around midday Sunday because of the volume of water Ida whipped up.

U.S. Army Corps of Engineers spokesman Ricky Boyette confirmed engineers detected a “negative flow” on the Mississippi River as a result of storm surge.

https://www.usatoday.com/story/news/nation/2021/08/30/mississippi-river-flowed-backward-due-strength-hurricane-ida/5647017001/
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I don't recall Katrina doing this, but I could be wrong.

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Reply Hurricane Ida was so powerful it reversed the flow of the Mississippi River (Original post)
Jilly_in_VA Aug 2021 OP
Bayard Aug 2021 #1
PortTack Aug 2021 #2
Hortensis Aug 2021 #3

Response to Jilly_in_VA (Original post)

Mon Aug 30, 2021, 12:33 PM

1. Isn't that like, some biblical thing?

Or maybe the movie, The Day After Tomorrow.

More climate change catastrophe. Any DU'ers down there? Stay safe.

We're supposed to get 4" rain from it here in KY the next few days.

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Response to Jilly_in_VA (Original post)

Mon Aug 30, 2021, 12:47 PM

2. Yes, actually last night it was reported this hadn't happened since Katrina, but then not since the

Massive Earth quake on the New Madrid fault in 1812.

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Response to PortTack (Reply #2)

Mon Aug 30, 2021, 01:01 PM

3. I read that a number of hurricanes cause it, but with one

particularly bad in recent times. Katrina or Isaac? Or? The one that caused many rivers that flow into the MS to become increasingly backed up over time, leading to massive floods in states far from the gulf/ I remember the evening news for some time reporting when predicted floods farther and farther north were now happening.

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