Invest 92L--80% 2 day, 80% 7 day odds of Development

[vortex95]

Given the fcst 850-200 mb wind shear over the northern Gulf is fcst in excess of 50 kt and how the global models depict the storm structure, I have a tough time thinking this can sustain a tropical status once farther N.  Sfc winds E of the center will likely get quite strong, but due to baroclinic deepening.

If this were a well-established strong TC already, I would not be as concerned about the shear here.

Here are two storms in early Oct 1992 and 1994 that fit this scenario. The 1992 event deepened to 996 mb and and 1994 to 1000  mb from baroclinic processes.

[GaWx]

0Z UKMET: landfall ~175 miles W of 12Z run with it near far SE LA and then MS. Strongest run yet with high end TS/990 mb:

NEW TROPICAL CYCLONE FORECAST TO DEVELOP AFTER 54 HOURS
FORECAST POSITION AT T+ 54 : 22.2N 92.1W

LEAD CENTRAL MAXIMUM WIND
VERIFYING TIME TIME POSITION PRESSURE (MB) SPEED (KNOTS)
-------------- ---- -------- ------------- -------------
1200UTC 08.10.2026 60 22.7N 91.7W 1003 30
0000UTC 09.10.2026 72 22.9N 89.9W 1001 30
1200UTC 09.10.2026 84 25.4N 88.6W 999 39
0000UTC 10.10.2026 96 26.4N 88.5W 997 48
1200UTC 10.10.2026 108 29.2N 88.7W 990 58
0000UTC 11.10.2026 120 32.1N 89.5W 992 29
1200UTC 11.10.2026 132 33.8N 88.8W 1002 25
0000UTC 12.10.2026 144 38.4N 83.2W 1003 12
1200UTC 12.10.2026 156 CEASED TRACKING

[Windspeed]

00z GFS was much more realistic with the progression of this system and the synoptic setup. Though it does still bring the TC to hurricane status in the southern and central GOM, significant weakening occurs by landfall due to all the aforementioned issues discussed previously.

[vortex95]

2 hours ago, Windspeed said:

00z GFS was much more realistic with the progression of this system and the synoptic setup. Though it does still bring the TC to hurricane status in the southern and central GOM, significant weakening occurs by landfall due to all the aforementioned issues discussed previously.

The 00z ECMWF still has a stark 700-300 mb RH gradient early on that just intensifies as it heads N.  The pattern/structure at 108 hr for this parameter looks more like a baroclinic leaf than anything.

It dependents it to 998 mb, 9 nm weaker than the 00z, which is in line w/ the 1992 and 1994 early Oct events as to am ET low development in the Gulf making landfall.

The HAFS-B is much deeper, but also look at its 700-300 mb RH fcst (attached).  That configuration strongly suggests a frontal structure and baroclinic leaf.  I would find it hard to believe it could drop into the 970s from largely baroclinic forcing.  The deepest ET low in the Gulf ion record s 980 mb from the Bliz of 1993 and that had unreal baroclinic support!

The GFS does the opposite of the HAFS-B, it makes it strong as a TC early, and  *then* weakens is as it heads N.  That coulld happen.