Tropical Hurricane Ida

[Downeastnc]

Chaser in Lockport just east of Houma, should get eyewall there....

Texas Storm Chasers â¡ @TxStormChasers

Hurricane Ida Intercept | August 29, 2021| Lockport, LA

www.pscp.tv

 

[Dewpoint Dan]

I'm afraid to see what Grand Isle will look like afterwards.

 

[Henry2326]

I'm afraid to see what Grand Isle will look like afterwards.

Ummmm...it might cease to exist.

 

[HSVweather]

Josh in Houma now

 

[Arcc]

That concentric eyewall will not be good for NO.

 

[Downeastnc]

20 miles inland from Grand Isle....not sure I would stay here for much longer....if the water blocks your exit north bad things happen....

 

[Brick Tamland]

From Greg Fishel

THIS IS BAD

This morning the pressure in the center of IDA dropped to 929 mb, putting it in the category of Hugo. Maximum sustained winds within the circulation are 150 mph, which is almost to Category 5. In the last hour the pressure has risen to 933mb. That doesn’t mean the storm is weaker, but that the rapid intensification has finally stopped. One of the possible reasons for this is what’s called an eyewall replacement cycle, where an eye with a larger diameter replaces the original eye with a smaller diameter. As air spirals into the eyewall of a hurricane, it accelerates. So the smaller the eye, the more time it has to do that. A larger eye cuts off that acceleration at a larger radius from the center. So the good news is that IDA has stopped strengthening. The bad news is that it’s already a strong Cat 4 hurricane. The eyewall is almost at the Louisiana coast. Our thoughts and prayers are with the people in the path of IDA.

 

[Henry2326]

10:00 am Discussion

It bottomed out at 929. NAM was close at 922.

NHC holding at 150 mph at landfall.

 

[Arcc]

That concentric eyewall will not be good for NO.

On second thought don’t be surprised if friction doesn’t tighten the inner wall and stop the ERC

 

[Dewpoint Dan]

10:00 am Discussion

It bottomed out at 929. NAM was close at 922.

NHC holding at 150 mph at landfall.


View attachment 89705

View attachment 89706

That's a lot of weakening from 150 to 105 in only 12 hours. I figured since it won't be going over mountainous terrain that the weakening would be slow.

 

[Stormsfury]

That concentric eyewall will not be good for NO.

New Orleans WFO currently has a NE wind 28 gusts to 41... the concentric eyewall and replacement cycle does actually look to put them in serious jeopardy with the eyewall raking the city and potential training over it as well... sheesh

 

[GaWx]

1. It sure has gotten hot at Southwest Pass (107, an obvious error caused I assume by a malfunction due to the extreme effects of Ida).

2. More seriously, note the 939.1 mb at LA Offshore Oil! This is a drop of 31 mb from the 970.1 in just one hour!

COASTAL OBSERVATIONS
LAKE AND NEARSHORE STATIONS

STATION/POSITION TIME SKY/WX TEMP WIND PRES WAVE
AIR SEA DIR/SP/G HT/PER
(UTC) (F) (DEG/KT/KT) (MB) (FT/S)
WAVELAND YACHT 1424 84 81 70/ 24/ 29 N/A
GRAND ISLE 1406 79 83 988.6
SOUTHWEST PASS 1424 107 82 987.4
NEW CANAL 1424 82 84 70/ 34/ 42 1005.1
SHELL BEACH 1424 81 85 80/ 38/ 46 1005.3

OFFSHORE STATIONS

STATION/POSITION TIME SKY/WX TEMP WIND PRES WAVE
AIR SEA DIR/SP/G HT/PER
(UTC) (F) (DEG/KT/KT) (MB) (FT/S)
64 S DAUPHIN ISL 1450 82 84 150/ 31/ 39 1010.2 24/11
LA OFFSHORE OIL 1436 79 40/ 5/ 60 939.1

 

[NickyBGuarantee]

I think maybe northern eye wall grazes grand isle but it’s going more to the left

 

[Henry2326]

 

[Brent]

 

[Henry2326]

 

[HSVweather]

Devastation underway in grand isle

 

[Henry2326]

 

[Tarheel1]

I'm afraid to see what Grand Isle will look like afterwards.

I’m afraid to see the 26 people that stayed on the island look like! ?

 

[Henry2326]

Devastation underway in grand isle