ATL: IDA - Remnants - Discussion

[igoldfish]

And props to the police chief on the Grand Isle webcam feed. So calm and sensible in the midst of that mayhem. Hopefully people watching the Grand Isle destruction on the weather channel will get a sense of what they might be facing if they don't evacuate for the next storm

[Chris_in_Tampa]

Hurricane Ida Tropical Cyclone Update
NWS National Hurricane Center Miami FL AL092021
1155 AM CDT Sun Aug 29 2021

...EXTREMELY DANGEROUS CATEGORY 4 HURRICANE IDA MAKES LANDFALL NEAR
PORT FOURCHON LOUISIANA...

NOAA Doppler radar imagery indicates that the eye of Ida made
landfall along the southeastern coast of Louisiana near Port
Fourchon around 1155 AM CDT (1655 UTC). Data from an Air Force
Reserve reconnaissance aircraft and Doppler radar data indicate that
Ida's maximum sustained winds at landfall were estimated to be 150
mph (240 km/h). The latest minimum central pressure estimated from
reconnaissance aircraft data is 930 mb (27.46 in).

Within the past hour, sustained winds of 43 mph (69 km/h) and a
gust to 67 mph (107 km/h) were reported at Lakefront Airport in New
Orleans.

A NOAA National Ocean Service tide gauge in Shell Beach, Louisiana,
recently reported a water level of 6.4 feet above mean higher high
water, which is an approximation of inundation in that area.

A NOAA National Ocean Service tide gauge at Bay Waveland Yacht Club,
Mississippi, recently reported a water level of 5.5 feet above mean
higher high water, which is an approximation of inundation in that
area.


SUMMARY OF 1155 AM CDT...1655 UTC...INFORMATION
-----------------------------------------------
LOCATION...29.1N 90.2W
ABOUT 15 MI...25 KM SW OF GRAND ISLE LOUISIANA
ABOUT 45 MI...75 KM SE OF HOUMA LOUISIANA
MAXIMUM SUSTAINED WINDS...150 MPH...240 KM/H
PRESENT MOVEMENT...NW OR 320 DEGREES AT 13 MPH...20 KM/H
MINIMUM CENTRAL PRESSURE...930 MB...27.46 INCHES

$$
Forecaster Brown/Brennan

[tolakram]

A snip from the live feed

[aspen]

AF303 has redeemed itself after two successful passes to cap off recon observations before landfall. Not sure what the two failures were all about.

[mrbagyo]

Pressure has started to level off in Fourchon Booster (maybe could still drop another 1 or 2 hPa)
936.67 hPa

[SconnieCane]

TWC just called landfall (Edit, I see above NHC did as well). Looks like a N wobble did just put Grand Isle into the RF inner eyewall.

[galaxy401]

So another landfall at peak strength....This also makes Ida the FIFTH Cat 4 or stronger landfall on the Gulf Coast since 2017! Insane!

Edit: Forgot about Irma's Cat 4 landfall on Key West.

[PTPatrick]

Definately going to be interesting to see how New Orleans and points east fair in this storm, just being on the edge of worst wind. but with lots of comparisons to katrina, it can’t be overstated, these are very different storms. Ida Ts wind radius is about what Katrina’s Hurricane wind radius was. It’s hard to imagine but Kats TS wind field went from west of Vermillion bay to almost Apalapchicola. The surge will be undoubtedly bad but it should pale in comparison to the water that was pushed in Katrina. one thing I think will catch folks off gaurd is the difference in direction of wind and what that will do in areas north of the lake as well as areas of terrebonne and La Fouche, which escaped some of the worst Katrina surge. Saffir Simpson scale is nearly useless when it comes to water risk, surge or freshwater. Seems like most of the infrastructure improvements could hold back the current forecasts but watching closely.

[KBBOCA]

 https://twitter.com/NWSNewOrleans/status/1432024015116374018

[Shell Mound]

 https://twitter.com/JackSillin/status/1432023858786324485

[drewschmaltz]

So another landfall at peak strength....This also makes Ida the fourth Cat 4 or stronger landfall on the Gulf Coast since 2017! Insane!

2 minutes away from high tide. Unbelievable.

[SconnieCane]

Grand Isle police chief to Paul Goodloe: "You gotta make it stop, we can't take hours more of this!"

[mrbagyo]

pressure now rising in Fourchon Booster
938.36 hpa

[Clearcloudz]

Quick Question: Are first responders required to stay on grand isle during this storm because I just heard police chief say they are seeing things being washed away and you could tell he was scared I know they might be there to help once the storm passes but a little extreme to put there own lives at risk as well.

[tolakram]

[KBBOCA]

 https://twitter.com/StuOstro/status/1432024631670681610

[La Sirena]

Grand Isle police chief to Paul Goodloe: "You gotta make it stop, we can't take hours more of this!"

I heard that, too. It’s heartbreaking. No other words for it.

[Cyclenall]

The cam just went offline for me, that might be it for the webcam!!

[JtSmarts]

So another landfall at peak strength....This also makes Ida the FIFTH Cat 4 or stronger landfall on the Gulf Coast since 2017! Insane!

Edit: Forgot about Irma's Cat 4 landfall on Key West.

Even crazier between 1970-2016 if I'm not mistaken there were only three (Hugo, Andrew, Charley) US Cat 4+ landfalls period.

[KBBOCA]

Quick Question: Are first responders required to stay on grand isle during this storm because I just heard police chief say they are seeing things being washed away and you could tell he was scared I know they might be there to help once the storm passes but a little extreme to put there own lives at risk as well.

Very scary now (but not surprising, I'm afraid) that TWC isn't able to re-establish contact with the police bunker there while they're in the inner eye wall. Praying for those first responders and all in Grand Isle for whatever reason.