CAT 5 Hurricane Dean - Archived threads

[mempho]

surge does NOT lag the intensity, that is a horrible myth that has spread.

katrina' surge was size related, not because it was a cat 5

I agree on the size argument...I always thought it was a function of both, however.

[Sanibel]

But to add one last friendly point without creating a need for the moderators, you are missing my point. I'm not really arguing surge here but pressure. Surely you must agree that a 918 category 4 is different from a 945 one? That was my point. Pressure should be a guide when guessing landfall effects. Especially in a large storm.

[whereverwx]

Here's the latest image.

[miamicanes177]

A 918mb pressure at landfall would put Dean ahead of both Katrina and Andrew as one of the most intense Atlantic hurricane landfalls. I believe 918mb at landfall would put him #3 or #4 all time. Behind 1935 Keys, Camille, and possibly Gilbert but I'm not sure on Gilbert.

[Dionne]

Anyone know where there is a failure chart for CAT5 winds? As in what happens with 155 mph winds?

[Weather Watcher]

Here's the latest image.

Thats the best ive seen Dean Yet. What a incredible shot!!!

Prayers for the people in it's path.

Steve

[Kerry04]

A 918mb pressure at landfall would put Dean ahead of both Katrina and Andrew as one of the most intense Atlantic hurricane landfalls. I believe 918mb at landfall would put him #3 or #4 all time. Behind 1935 Keys, Camille, and possibly Gilbert but I'm not sure on Gilbert.

Hurricane Katrina had a pressure of 918mb at landfall in Louisiana. The pressure of Hurricane Dean could be lower than 918mb at landfall

[Mello1]

Anyone know where there is a failure chart for CAT5 winds? As in what happens with 155 mph winds?

Cat 5 winds = catatrophic damage.

[miamicanes177]

A 918mb pressure at landfall would put Dean ahead of both Katrina and Andrew as one of the most intense Atlantic hurricane landfalls. I believe 918mb at landfall would put him #3 or #4 all time. Behind 1935 Keys, Camille, and possibly Gilbert but I'm not sure on Gilbert.

Hurricane Katrina had a pressure of 918mb at landfall in Louisiana. The pressure of Hurricane Dean could be lower than 918mb at landfall

Katrina was officially 920mb at landfall according to the NHC.

[Wthrman13]

But to add one last friendly point without creating a need for the moderators, you are missing my point. I'm not really arguing surge here but pressure. Surely you must agree that a 918 category 4 is different from a 945 one? That was my point. Pressure should be a guide when guessing landfall effects. Especially in a large storm.

But, Sanibel, you were talking about the effect of pressure on storm surge!

Not sure why the moderators would need to be called in, but the only one missing the point here appears to be you. Nobody is claiming that there aren't important structural differences between a 918 mb Cat 4 and a small 945 mb one. The point I (and others) have been making is that pressure is a very small factor compared to others when accounting for storm surge. You claimed otherwise, and I'm saying you are simply incorrect. It's nothing personal, and I felt I have also been friendly.

Moderators, if this is inappropriate, I apologize, but I felt that since this began with a discussion of Dean's current central pressure as related to storm surge, and I felt that a scientifically incorrect statement was made, I felt it was appropriate to counter that.

[fasterdisaster]

Ugh. Double post. Feel free to delete this post mods.

[fasterdisaster]

Anyone else think we need recon in there, like, NOW?

[Annie Oakley]

Here's the latest image.

Dean is AWESOME! This is the best picture of him yet........

[RL3AO]

Recon is in there.

[CronkPSU]

Anyone else think we need recon in there, like, NOW?

doesn't really matter at this point, we and all the people in that area know where it is headed and what kind of impact it will have

[fasterdisaster]

Recon is in there.

Wait so is it having communication problems again?

[PhillyWX]

Quite a bit of damage in Jamaica and 10 dead according to Philadelphia TV:

http://philadelphiaweather.blogspot.com ... ean-6.html

[Ptarmigan]

A 918mb pressure at landfall would put Dean ahead of both Katrina and Andrew as one of the most intense Atlantic hurricane landfalls. I believe 918mb at landfall would put him #3 or #4 all time. Behind 1935 Keys, Camille, and possibly Gilbert but I'm not sure on Gilbert.

Gilbert made landfall on the Yucatan Peninsula at 900 mb and 160 to 165 mph winds.

[quandary87]

Its sortof funny that Sanibel is arguing with a pro met. However, I think his main point has some validity and that he's managed to obscure it.

Please correct my statements if they are incorrect, but I think this is the idea:

Wind is caused by pressure gradients.
Lower pressure means there must either be higher winds or a broader (larger) windfield.
Surge and waves are caused by wind blowing on water over time (duration), and space (fetch).

Therefore, disregarding topography of the area (basically, two storms coming into the same area at the same direction), pressure determines wind impact on water (again must either be higher wind or larger area for any given pressure) and therefore indirectly determines surge.

[BensonTCwatcher]

Scientific or not, that is one BAD motorscooter.