#5244 Postby Chris90 » Sun Sep 01, 2019 12:53 am
In regards to the intensity debate, I think what these storms over the past few years have been showing us is that the eyewall profile can really favor the lower levels (and quite often does in my opinion). I think there's been a lot of evidence to show that it is not unreasonable for SFMR to exceed the 700mb or 750mb flight level.
One of my favorite pieces of data are the eyewall dropsondes, and I like to look and see how the winds change as it descends. Sometimes you'll see big drops over small distances, like 160kts at 921mb and then 140kts at 925mb, and sometimes you'll see much smaller differences over larger distances, like 165kts at 920mb, and 162kts at 935mb, indicating strong winds are maintaining fairly consistently over a thicker chunk of the eyewall.
NOTE: Those values stated above are not from any dropsonde in Dorian, they are just values I made up as an example to illustrate my point.
Now, getting to REAL Dorian data. That dropsonde in the NW eyewall that measured 155kts at the surface is strong evidence to me that verifies the Cat 5 SFMR values, and not just because of the 155kts at the surface, which was 955mb. The strongest wind it measured was 170kts at 881mb, and EVERY single value between the 170kts at 881mb and the 155kts at 955mb (surface) was above 140kts. That's 140kt readings through the entirety of the 74mb layer above and to the surface. The only Cat 4 readings that occurred were above 881mb closer to the flight level, which would explain lower flight level winds than SFMR.
I respectfully disagree with the NHC, but I think some are being too harsh on them with this. Their job is so exceptionally stressful, especially at times like this, and they have to focus on more than just intensity data. They're trying to provide millions of people with the best info they can to ensure the safety of all individuals in the path of this storm. There's so much that goes into their job, so I think it's important to remember how much easier it is for all of us to sit here and make judgments. We're not in their position, and they have those positions for a reason. They're the best at what they do, and they work really hard. Thanks to them and all the other pro-mets we have for the hard work they do, and I hope when this hurricane season is over ya'll get a really nice break with some exquisite R&R.
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