ATL: ISAAC - Post-Tropical - Discussion

[DukeDevil91]

It appears that there is an ULL sitting just north of the Yucatan right now. I believe this is what is pulling the MLC and ULC away from the surface low.

[cheezyWXguy]

This storm is so bizarre. An eye seems to forming on that RBTOP, WAY to the north of the LLC.

Not quite, its an overshooting cloud top. Oftentimes they do show up with a little indentation surrounding them, but this storm has a while before we really see an eye feature start showing up.

[Hurricaneman]

I have a question, is it possible that recon has been following the wrong area the last few hours or is this really a severely decoupled storm

[WilmingtonSandbar]

Ok, we need to change the subject to something more constructive. To many frayed nerves here.

Mark, I understand your demand to get back to something more constructive, but I think this line of conversation has been building most of the day, and in the wee hours of the night might be the best time to have it. We know that mainly the serious members are the ones here now watching the model runs and all.

Are you a Pro Met?

Me? No, and I have never claimed to be. I learn something new everyday on here.

There is a Pro-met from our area on here though. I don't know his real name, so I don't know if he is on the air or which channel.

[crimi481]

Yes - the N.E Bands have been shredding off to the N.NE all day/night
Decoupling - big wedge of dry air across state= from Sarasota south to Ft Meyes
Something pullig on hose ands -from N.E

http://www.ssec.wisc.edu/data/geo/index ... thod=flash

If the pulling action stops =from storms N..E - may cause Isaac to slow/stall befoe landfall. What could pick it up to N. coast?

[BlueIce]

The newest RBTOP product seems to show what everyone has been hinting at for the last couple of hours.
[[/img]

Meaning what exactly??
I'm not too proud to admit, I have no idea what you are referring to.
Please spell it out to us nonprofessionals/nonweather educated members.

Basically that the storm appears to be strengthing north of the upper level low and the mid level convection is still expanding based on the radar imagery. It's going to take a couple of hours to figure out what is in store for this system.

[Air Force Met]

I have a question, is it possible that recon has been following the wrong area the last few hours or is this really a severely decoupled storm

They flew through the area at 850...and found strong NE winds. So far as we can tell...the 850 and sfc are still stacked. It's the mid-level that's taking off.

[tropicwatch]

It appears that there is an ULL sitting just north of the Yucatan right now. I believe this is what is pulling the MLC and ULC away from the surface low.

Uploaded with ImageShack.us

[fasterdisaster]

This storm is so bizarre. An eye seems to forming on that RBTOP, WAY to the north of the LLC.

Not quite, its an overshooting cloud top. Oftentimes they do show up with a little indentation surrounding them, but this storm has a while before we really see an eye feature start showing up.

Thanks, I sometimes get fooled by those.

[vbhoutex]

Is that convective feature S-SW of Isaac and outflow boundary or a curved band?

The Weather channel just stipulated that it's either something similar to a gust front (think collapsing thunderstorm on radar) or high cirrus.

I would go with high cirrus, if I was given a choice. I don't see any evidence of out flow boundaries.

[Cyclenall]

Those bands flowing in between Fort Lauderdale and West Palm Beach are looking very powerful, just training in from the Atlantic. I'm sure residences there are all without power now.

[Aric Dunn]

I have a question, is it possible that recon has been following the wrong area the last few hours or is this really a severely decoupled storm

They flew through the area at 850...and found strong NE winds. So far as we can tell...the 850 and sfc are still stacked. It's the mid-level that's taking off.

What do you think about buoy 42023? and what recon just did. hard left turn winds no longer point the old llc being down where it was.

[TwisterFanatic]

Yea, I don't think those are outflow boundaries.

[fasterdisaster]

Anyone think the CDO is expanding closer to the LLC in the last frame here?

http://www.ssd.noaa.gov/PS/TROP/floater ... -long.html

[ncweatherwizard]

I have a question, is it possible that recon has been following the wrong area the last few hours or is this really a severely decoupled storm

They flew through the area at 850...and found strong NE winds. So far as we can tell...the 850 and sfc are still stacked. It's the mid-level that's taking off.

Little bit of southerly shear I suppose. Never good to have an ULL to your west if you're a TC.

[Hurricaneman]

recon is heading for the MLC, people may be suprised what they find

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[tropicwatch]

The next advisory could be quite interesting.

[WxGuy1]

The newest RBTOP product seems to show what everyone has been hinting at for the last couple of hours.

Just for the record, is RBTOP really a new product? The image says IR Ch. 4, which is the traditional longwave IR channel (wavelength of 10.7 micrometers). Unless I'm mistaken, the "RBTOP" is really just an image of the same longwave infrared channel but with a different color-table. On the satellite floater page, there are several different color-tables available. So, the actual data are the exact same as those shown using the AVN color-table, for example, but the colors associated with the data are different. The color table may or may not make a particular feature easier to see... In this case, I think it does make it easier to see, largely because it has many more colors than most of the other IR color-scales (note how the transition from one shade of a color to another is very smooth using the RBTOP color-table).

[deltadog03]

WOW!! Recon just punched the center.....The LLC Looks like its gotten sucked into the MLC NE....Short term for the models for get about it!!!!

[Meteorcane]

Quick question how do the Wisconsin charts measure Vorticity. I know that when given wind components and horizontal spacing Vorticity is dv/dx - du/dy, my question is how do they get there wind components to plug into that equation? Remote measurements, surface measurements, UA measurements, interpolation? I ask because I want to know just how accurate these charts are for vorticity (especially UL vorticity)