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Major Hurricane Ida


WxWatcher007
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  On 8/30/2021 at 12:11 AM, Normandy said:

Easily a top five hurricane landfall in the north gulf coast.  Thankfully a far west track and slow movement spared New Orleans the worst but others certainly took it on the chin

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It tracked significantly further east than anticipated and New Orleans hasn't even seen the worst of it yet.

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  On 8/30/2021 at 12:18 AM, hazwoper said:

Actually I expect, based on eye position and radar, downtown NO has indeed already seen the worst.

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In terms of wind, probably.  I would hold my breath on flooding though.  IIRC, the levee failures took some time to unfold with Katrina.  Seemed like the city was going to be basically ok and then...all hell broke loose.

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  On 8/30/2021 at 12:25 AM, Syrmax said:

In terms of wind, probably.  I would hold my breath on flooding though.  IIRC, the levee failures took some time to unfold with Katrina.  Seemed like the city was going to be basically ok and then...all hell broke loose.

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Yes, exactly this.  It was basically fine until the levee failures.  If the levee didn’t fail in Katrina…Katrina wouldn’t be quite the legend that it is today.  

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  On 8/30/2021 at 12:31 AM, MattPetrulli said:

 

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That is not good.  No idea what their backup power requirements are to keep the city drained but my understanding is they need some amount of continuous pumping capability even in normal comditions.  If the backup generation fails the pumps don't work.  Same thing that bit Fukushima when the tsunami breeched their floodwalls and took out their backup ac power. 

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  On 8/30/2021 at 12:36 AM, Wmsptwx said:

They do I’ve been reading up on them, but no guarantee they work properly.

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We don't know exact status . All they stated was that they lost their power supply off the transmission system. I'm guessing that they have substations fed from the High Voltage 115 kv or higher Transmission system.  Distribution system at lower voltages probably lost also if the HV and EHV are tripped.  It did imply they have a backup source working.  How many generators and how much of their pump system that can be supplied...and for how long...no idea. 

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