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SNE "Tropical" Season Discussion 2020


Bostonseminole
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1 hour ago, WxWatcher007 said:

No need to change anything from the NHC. I don't think this is currently a hurricane based on recon, but it's also not a dissipating storm.

We were in this same position yesterday. It was a naked swirl and then around 19z it began firing convection, closed out an eye about 3-4 hours later, and recon found a strengthening hurricane. The day before? It was a disorganized mess with a 400 mile wide wave axis tilted SSW to NNE and crossed DR/Haiti to become a category one hurricane.

This is the nature of tropical. It's not linear and it's not always the spectacular RI to visually stunning type development we've seen the last few seasons. It's easy to lose sight of that. 

This storm in particular has seen substantial intensity swings. It looks absolutely horrible right now, and it will continue to struggle, but there's a lot of uncertainty left here, despite the current conditions. 

People get carried away due to short term intensity variations....Wednesday night, it was going to be a cat 3 at LF because it became a hurricane 12 hours ahead of forecast, regardless of high confidence impending shear. Now, it's going to dissipate because the shear is actually weakening it. This was actually more on FB than anyone here, but people need to learn that a slightly stronger initial intensity does not alter the universe and render a system impervious to the effect of shear. Any guidance showing a period of weakening was tossed because guidance was 10mph low and 10mb high at initialization.....weenie defense mechanisms.

 

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Wow - the official NHC forecast track hasn't shifted for us in 24 hours.  Go look at forecast 14A (2PM Fri), and that path is almost the exactly the same as the path at 18A (2PM today).  Sure the models are going to keep moving the jackpot of precip at every model run, but we're talking about swings of a couple of hundred miles based in minor variations each run.  You blend them together and right now most of us are getting at least 2" of rain, with pockets of 4", and that's been pretty steady over the last 24 hours as well - and much of that is coming well ahead of the "eye" of the storm.

Looks like we'll be getting a pretty good rainstorm, with the intensity of a moderate nor'easter for those that end up on the eastern side of the eye, if anyone ends up there.

I'm sticking to that until something shows me otherwise.  Obviously LF in Florida changes things, but that hasn't happened yet, and if it does, it's going to give us plenty of time to adjust the forecast.  There was never a consistent signal that this was going to be a strong storm/hurricane up in SNE once we got into the timeframe where the tropical models could provide forecasts for our area...
 

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