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Wow, I had no idea there were STS in HURDAT2 that had winds in excess of 60 kt. Since NHC started declared ST systems regularly in the late 1990s, the has never been a "subtropical hurricane." The reasoning I heard is that if a ST system gets winds strong enough to reach hurricane-strength, it is can called fully tropical, which doesn't make any sense really. 65 kt is not some magic number that changes the structure of a storm. Many ET storms have sustained winds well over 65 kt, and there is nothing says they can't still have 65 kt when they go ST!

18z euro went off

Concerning @CoastalWx's "garbage model" and how it handles TCs... Given the RRFS is new, I am not sure it handles TCs. I asked the modeling group if it handles TCs well. They said it should, but they said ti defer to the HAFS and the like. This event will be a good test at least when it comes to ET to ST/T transition. The RRFS is about 10 mb deeper than the other models, and shows a tight inner core pressure gradient eventually. That indicates tropical structure.

I'm saving my arrows

This is a much "warmer" type ET to ST/T suggested transition. The ET surface low has developed in a more tropical-type atmosphere. As noted earlier, the low is located S of the 576 dm 1000-500 thickness line, and as it develops, a pool of 576 closes off over it. Also, initial ET development to ET peak to ST/T transition can occur very quickly at times. The system off the Mid-Atlantic/New England coasts in mid-January 2023 went ET to ST rather fast (personally I think this was tropical and a hurricane), developing a distinct, persistent eye and remarkably deep convection for a winter atmosphere. See sat loops here: https://x.com/WxTca/status/1615532584016162822 https://x.com/burgwx/status/1615099242728628231 If this can occur in January, there is no reason to think this can not occur here in September over significantly warmer SSTs and a less overall sharp baroclinic environment! The point being extraordinary/outlier patterns often result in extraordinary/outlier individual wx events, so we need to adjust/adapt for that and think outside the box in such cases.

This is a much "warmer" type ET to ST/T suggested transition. The ET surface low has developed in a more tropical-type atmosphere. As noted earlier, the low is located S of the 576 dm 1000-500 thickness line, and as it develops, a pool of 576 closes off over it. Also, initial ET development to ET peak to ST/T transition can occur very quickly at times. The system off the Mid-Atlantic/New England coasts in mid-January 2023 went ET to ST rather fast (personally I think this was tropical and a hurricane), developing a distinct, persistent eye and remarkably deep convection for a winter atmosphere. See sat loops here: https://x.com/WxTca/status/1615532584016162822 https://x.com/burgwx/status/1615099242728628231 If this can occur in January, there is no reason to think this can not occur here in September over significantly warmer SSTs and a less overall sharp baroclinic environment! The point being extraordinary/outlier patterns often result in extraordinary/outlier individual wx events, so we need to adjust/adapt for that and think outside the box in such cases.

I should've zigged when i zagged?

And bam there maps are showing stronger winds and worse coastal flooding finally.

Book a tee time. It'll rain. Hard.

How much for Taunton?

Given the RRFS is new, I don't know how it handles TCs. I asked the modeling group if it handles TCs well. They said it should, but they said ti defer to the HAFS and the like. This event will be a good test ast least when it comes to ET to ST/T transition. The RRFS is about 10 mb deeper than the other models, and shows a tight inner core pressure gradient eventually. That indicates tropical structure.

Yeah something strange is going on. Probably happened back in the 1700s too.

Odd sucker! Just go to shows the true vagaries of these things.

I mean this is a hybrid type storm in a transition season. Im sure it’ll be breezy at least, but I don’t think it’s crazy to envision lots of dry periods followed by quick downpours rotating through. Some areas will do well, but I wouldn’t expect like 2+ totals to be widespread

There won’t be any rain there tomorrow imo.

Gefs was id say a fairly big improvement

God this storm is annoying from a forecast perspective. Some models bring rain in here tomorrow. Others don’t until Sunday.

Here is a remarkable satellite image from Aug 23, 1974 from the C and EPAC! And it was weak La Nina.

Very warm start to october, with possible record minima.

May see it later...

NYC gonna flood with this thing right?

River East should really have one based on guidance . Watch not warning

OKX should have a high wind warning for LI and maybe even srn CT. JMHO.

The fact that there's a hook and a day or more of slow movement complicates things. Some coastal, including some of our more notable storms (and tropical systems) we've gotten have been straight thumps that pas through quickly, where the main concern is shifts left and right. But here, for this system, there's huge model variation (for being a couple of days away) in the time and location of when (or if) it will make landfall all based on potential loops, stalls, and intensity.