Windspeed

I think the latest date ever recorded for the formation of a hurricane since maritime shipping logs occurred in 1941. That date is September 17th. That record is toast.

Though I am certain many that frequent here as tropical enthusiasts and mets are bored stiff, I am not. Several, including vortex95 have mentioned the importance of a season like this for data acquisition, trends, and analogs for study and future reference. We aren't just setting a record now. We are shattering it. Clearly, we're in rare territory. With the shear values at record levels across the basin (the exception being pockets of favorablility over the GOM and SE CONUS), we're going to have to consider the potential of development remaining null and void over the MDR and central Atlantic basin persisting into closure of the season. Normally, we get a hybrid system that transitions into a fully symmetrical TC somewhere during October and November. But if the upper-level environment remains status quo, that may not occur this year. Really, the only potential could come from a CAG system during late September and October, but it's going to take some luck. I still do think we get a hurricane in the GOM or WCARIB, but we've only got two months to see that to fruition. Clearly, whatever is transpiring with this record-breaking El Niño is overwhelming whatever has anchored the extended +AMO decadal cycle and shut that down, at least for now.

It's definitely among the most fascinating microcanes. Does anyone remember Iris? That's my all-time favorite.

It's going to be some chaotic modeling with any potential WCARIB gyre until we actually get a gyre and low genesis. Best watch with huge clumps of salt.

Burst of deep convection in the last thirty minutes. Hopefully, that doesn't wrap around because it is crunch time.

^Thanks for posting the Molokaʻi radar. You can still make out the eyewall and does indeed look like Ni'ihau is going to take a rough hit regardless now. Also, the closer 88D site in Kauai that failed/went down earlier is very exposed on the southern coast. So it would have probably failed at some point regardless of issue. https://bsky.app/profile/kc5knd.bsky.social/post/3muy33554uk2v

Most recent pass by recon:

The radar tower in Numila (PHKI) has been down for three hours. So we're running a bit blind beyond satellite. It's going to be very close whether the core or part of the eyewall clips Puuwai on the island of Ni'ihau. As mentioned before, modeling had us breathing too easy only to see guidance shift back east late in the game. I consider this a short-range failure in modeling, being that nearly all operationals and TC modeling had the core missing to the west somewhat comfortably no less than 48 hours ago. Again, you always hate to be on the eastern side of a chaotic trough interaction. Usually, if there are errors in a southwesterly steering flow setup, it's back towards the east if there is a correction.

The strengthening Azores SPHP is only going to exacerbate vertical shear with an increased low-level easterly jet as mid-to-upper westerly rivers are still firmly planted from central America across the Atlantic tropics, MDR and sub-tropics. That combined with SAL should get us to the new record on September 12th for the latest hurricane in the satellite era. Of course, we might extend that record for a while based on the look of long-range modeling.

Modeling and the shorter range is coming together to miss Ni'ihau and Kauai to the west. The main official guidance is also locking in just far enough west to breathe easier. We still have to watch for any late adjustments back east to avoid impacts, but I feel a lot better about the core not impacting those two islands. Also, yes, the surf and wave action should be insane through the next week.

This is now on the short end of the midrange at no less than 120 hrs out now. Yet, it still should be tabbed with unusual uncertainty due to the lower accuracy of modeling a trough capture interaction. Yet, these are severe modeled impacts we have to watch. I must also be clear that the GFS has had its issues. Really, all global OPs have due to various lacking of data sampling. That being said, five days is, well, five days. We're creeping closer into short-range territory. Does this hold? I must admit I don't like this appearance. Any undermodeling of that trough and cutoff evolution, and we're even further east. Never like to be east of these when it comes to a southwesterly steering current.

The 18z ECMWF operational is more gradual with Lowell's northward turn and is slower with the capture of both Karina and eventually Lowell by the mid-to-upper trough. Lowell passes by at a further distance from Ni'ihau and Kauai before turning back towards the NW as the trough fills/weakens. The 00z GFS is much faster with Karina's capture, and the trough has a stronger influence on Lowell, impacting both islands. To be clear, at this range, both OPs are too close for comfort, and I am sure this is going to further fuel speculation tomorrow. Here is the 00z ECMWF. Still misses to the west, but it appears to be a closer pass than the 18z run:

Edouard isn't moving away from the juiced environment fast enough, and unfortunately, the mesoscales are showing deep intense training cells over the same locations this afternoon and evening. Some of these feeders may back'build towards the GOM. Flooding is going to become a big problem.

As mentioned in a previous post, we still need to watch that developing buzzsaw (Lowell) for a northward turn in a few days. Some of the globals have been flirting with Kauai every other operational run. It may ultimately miss to the west, but that may not be nailed down yet until we see how trough interaction evolves.

Edouard's structure remains quite impressive this late AM. It doesn't appear these deep convective bands are going to let up anytime soon. It's no surprise that the rain totals are beginning to lead to flash flood emergencies.

Storm totals so far with the worst falling between Warren and West Livingston. Storm motion is slowing, but the circulation is holding together quite well.

A discussion we can take over to the main seasonal thread, but I just wanted to state that the record shown by Dr. Klotzbach is definitely in jeopardy. To reiterate the point already made in above posts, given the rate at which Edouard was organizing over a mere 24 hours, I concur that it would have become a hurricane. Formation a bit further southeast over the east-central GOM, and it may have even bombed into a major prior to landfall. Granted, the environmental conditions weren't perfect. Lingering pockets of stable airmass in the mid-levels did appear to interfere with the convective envelope at times. But shear was light, and the immediate surface temperatures prime for rapid deepening once the system mixed that out. Location of genesis and the short window of time were ultimately the most critical factors in Edouard's development.

000 WTNT65 KNHC 011925 TCUAT5 Tropical Storm Edouard Tropical Cyclone Update NWS National Hurricane Center Miami FL AL052026 225 PM CDT Tue Sep 01 2026 ...EDOUARD MAKES LANDFALL NEAR JOHNSON BAYOU, LOUISIANA... WSR-88D radar data from Lake Charles, Louisiana, and Houston, Texas, indicate that Edouard made landfall near Johnson Bayou, Louisiana, at 220 PM CDT (1920 UTC). Maximum sustained winds are estimated to be 60 mph (95 km/h). A National Ocean Service station near Texas Point, Texas, (TXPT2) recently reported a sustained wind of 57 mph (93 km/h) and a wind gust to 71 mph (114 km/h). SUMMARY OF 220 PM CDT...1920 UTC...INFORMATION ---------------------------------------------- LOCATION...29.7N 93.8W ABOUT 15 MI...25 KM SSE OF PORT ARTHUR TEXAS ABOUT 30 MI...50 KM WSW OF CAMERON LOUISIANA MAXIMUM SUSTAINED WINDS...60 MPH...95 KM/H PRESENT MOVEMENT...NW OR 305 DEGREES AT 8 MPH...13 KM/H MINIMUM CENTRAL PRESSURE...996 MB...29.41 INCHES $$ Forecaster Mahoney/Berg/Reinhart

We still do not have an official landfall per the NHC, though it should be momentarily. Edouard's vortex has been stubbornly hugging the shoreline just ESE of Sabine Pass for quite a while now.

Really rare hiccup from the NHC with their timestamps... Edit: The public advisory has been corrected.

Not playing devil's advocate, but it was a small core to begin with. I don't think it needed tightening so much as it just needed an intense inner band to erupt in close proximity to the nascent LLC. Once that happens, it's better able to absorb/feed off of the immediately high SSTs. It's essentially a feedbak loop. You need a strong cell to wrap and increase that inflow into the updraft, hence what we are seeing now. Sure, it doesn't hurt to be near the shoreline and moving over high heat content.

There is still a weaker component to the northern semicircle of the overall vortex, but compared to even three hours ago, this is a very significant improvement in core presentation.

Wow, look at that strong mesovortex wrap up at the tail end of the intensifying core band. Fascinating stuff watching this unfold on radar.

You know, interestingly, in the past thirty or so minutes since posting that, the old inner circulation or nascent core is getting absorbed by a strong band that is intensifying. That is what you want to see if you want strengthening, but it needs to wrap around to become a proto-eyewall feature. At any rate, such a strong band should be resulting in a significant expansion of convection / cold cloud burst on satellite soon.

The southern semicircle of the circulation continues to improve. However, the NE quadrant has simultaneously deteriorated on radar. I'm doubting we're going to see any significant intensification prior to landfall at this point, though there is still time for some further pressure fall and marginal increase in winds. A moderate 50-55 kt TS still seems quite possible, but a borderline hurricane would be surprising at this point. We would need to see nascent eyewall or core band developing, and that doesn't seem to be occurring. We've got, what, six hours remaining, give or take an hour?