ATL: HANNA - Remnants - Discussion

[GCANE]

Classic warm core profile, much more stable than this morning.

AMSU Sounder Analysis bumping it up 1C from a few hours ago.

[ScottNAtlanta]

Keep an eye on this buoy...Its directly in the path of Hanna

https://www.ndbc.noaa.gov/station_page. ... m=M&tz=STN

[Craters]

Maybe somebody can answer a question for me. I'm looking at the outflow from Hanna via the GOES-EAST cirrus channel (https://weather.cod.edu/satrad/?parms=subregional-W_Gulf_Coast-04-24-1-100-1&checked=map&colorbar=undefined), and there's hardly anything in the entire northwestern sector. I mean, there's some, but nowhere near as much as what's around the rest of the system. What would be stifling outflow so much just in that sector?

Thanks...

Some dry air, mostly in the mid-levels as mentioned by the NHC this morning. Also, I think that dominant high pressure has bumped it south and impeded it's northwest side.

Unfortunately, it appears to be recovering from that though, and strengthening.

Yeah, I've been watching that dry air to the west and northwest all week. The thing that got me wondering about that, though, is that the dry air should be spiraling upward, and if it didn't get mixed with more humid air on the way up, I would have thought that it'd be exiting the column in a different sector of the system, if that makes any sense. Regardless of my problem with the evacuation mechanics, the ridging certainly makes sense.

Thanks, Mike!

[Craters]

Maybe somebody can answer a question for me. I'm looking at the outflow from Hanna via the GOES-EAST cirrus channel (https://weather.cod.edu/satrad/?parms=subregional-W_Gulf_Coast-04-24-1-100-1&checked=map&colorbar=undefined), and there's hardly anything in the entire northwestern sector. I mean, there's some, but nowhere near as much as what's around the rest of the system. What would be stifling outflow so much just in that sector?

Thanks...

I'm guessing this upper level wind map answers the question. Upper level winds are strong, evacuating a lot of air, except in the NW where the anticyclone manifests itself further inland.

https://i.imgur.com/lIjIJEt.png

Yep -- it did! Thanks, Visioen -- just gotta know the right people, I always say...

[GCANE]

Looks like convection is firing on the coast.
Going to moisten a good portion of the troposphere for Hanna on approach.
Should be getting soundings in about an hour.

[SouthDadeFish]

Yeah.... This ain't looking good. Really starting to wrap up now. I fear residents in the path of the storm will wake up tomorrow to a hurricane... and one stronger than they thought they'd see. Hopefully I'm wrong. The P3 is enroute to get a better estimate of the intensity and structure of the storm.

 https://twitter.com/MikeFischerWx/status/1286793772681113600

[GCANE]

Latest sat radar, strong infeed from the high CAPE area just off the coast.

[Highteeld]

convection is much colder and deeper now than a few hours ago. Tops approaching -85*C

[Highteeld]

Min pressure also likely 995 mb or less, KHHV is reporting 998 mb with sustained 30 mph winds

[Aric Dunn]

heavy convection filling on the SW side on the Corpus radar right around the center very quickly..

should see it on visible shortly.


there are going to be some unhappy people in the morning.

[Mob1]

Models now have Hanna moving SW after landfall and potentially having a pretty significant impact on Brownsville.

[Highteeld]

Gonna have to stay up all night for this m'fer. brb injecting espresso into my veins

[Highteeld]

[Aric Dunn]

Models now have Hanna moving SW after landfall and potentially having a pretty significant impact on Brownsville.

well the fact that it moved wsw the last several hours..

I would watch for it to come in at the bottom side of the model envelope.

[Cataegis96]

Core is developing nicely now, and that feeder band in the SW quadrant is really starting to establish itself. Giving the system that classic fist look.

[Highteeld]

Wouldn't be surprised to see this make landfall with around 980 mb intensity.

[tarheelprogrammer]

I am going with 960 mb landfall. Final estimate from me, we shall see

[Aric Dunn]

pressure 997.. winds north at 20mph. still 30 miles wsw of the center.. central pressure probably farther to around 993

[toad strangler]

iCyclone is inbound to the area so there is that.

[NDG]

Its beautiful outflow has returned as the northerly shear has relaxed again.