ATL: ISAAC - Post-Tropical - Discussion

[crimi481]

Dueling Lows..the Norm in Gulf it seems. But I believe there have been 2 Low centers within that large center thingy
Think hey fight until too tired -then join. It takes lot fuel ( moisture in feeding) to keep 2 engines humming together
If slows and 2 Lows get in goove together - Storm could Be Huge!!

http://www.ssd.noaa.gov/goes/east/gmex/loop-bd.html

The posts in this forum are NOT official forecast and should not be used as such. They are just the opinion of the poster and may or may not be backed by sound meteorological data. They are NOT endorsed by any professional institution or storm2k.org. For official information, please refer to the NHC and NWS products

[Hurricaneman]

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!!!!

This may cause it to go much farther east than forecast, I wouldn't let your guard down from texas to New Orleans, but the relocation of the center could make this a Florida Panhandle landfall

The posts in this forum are NOT official forecast and should not be used as such. They are just the opinion of the poster and may or may not be backed by sound meteorological data. They are NOT endorsed by any professional institution or storm2k.org. For official information, please refer to the NHC and NWS products.

[BlueIce]

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

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).

By newest I meant current as of 04:45 GMT. But yes RBTOP is handy to see the highest cold cloud tops by the darker shading.

[brunota2003]

And there you have it...a center relocation, in stunning time. Ugh this storm gives me a headache.

[fasterdisaster]

How far away and in what direction is the new center from the old one?

[SunnyThoughts]

So is this confirmed now...is the actual center really in the middle of the convection...all stacked and everything?

[WxGuy1]

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

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).

By newest I meant current as of 04:45 GMT. But yes RBTOP is handy to see the highest cold cloud tops by the darker shading.

Aaaah. I misunderstood. Carry on, then! This is a strange storm. I'm not sure I've seen a cyclone this mature (in terms of how long it's been a tropical storm) continue with what apparently looks like multiple low-level centers. If the true center discretely jumps northwestward from the previously-tracked center, then this very well could have appreciable implications for landfall location.

[SEASON_CANCELED]

Now
it
Gets
Fun...this will effect forecast

[ncweatherwizard]

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)

I actually don't know. I generally look at model analysis anyway if I'm interested in taking a quick look at vorticity fields. For that matter, the vorticity on those CIMSS charts might be based on a particular model analysis.

[crimi481]

Losing its arms and legs..A big round thingy rolls to Big Easy? Or loops arpoun Gulf. BIZARRE Storm indeed

[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)

I actually don't know. I generally look at model analysis anyway if I'm interested in taking a quick look at vorticity fields. For that matter, the vorticity on those CIMSS charts might be based on a particular model analysis.

Ah yes that would make sense, and I have at least a rudimentary understanding of how models determine initial parameter values.

[Aric Dunn]

Yeah go figure.. i was just saying a few min ago that I was not sure why it had not reformed or got pulled up there yet.. guess I spoke to soon !

[PTPatrick]

According to the wundermap on wundergound that allows you to superimpose the cone on the satellite...if center is where it looks it's currently outside the north edge of the cone.



Still defer to mets...would this effect track? My thought are it could put it further nortn quicker perhaps allowing it to feel the weakness more than gfs sees.

[WxEnthus]

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!!!!

I saw recon making that turn and head north once it was obvious there was no windshift along the previous coc track. I was wondering what they'd find further NW!

Do we have a VDM yet?

Edited to correct direction.

[TwisterFanatic]

Don't think it's actually that much farther north of the original center.

I maybe wrong though.

[Hurricaneman]

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!!!!

I saw recon making that turn and head north once it was obvious there was no windshift along the previous coc track. I was wondering what they'd find further NE!

Do we have a VDM yet?

Its possible that recon has been following an eddy for the last couple of hours

The posts in this forum are NOT official forecast and should not be used as such. They are just the opinion of the poster and may or may not be backed by sound meteorological data. They are NOT endorsed by any professional institution or storm2k.org. For official information, please refer to the NHC and NWS products.

[Air Force Met]

Don't think it's actually that much farther north of the original center.

I maybe wrong though.

It's a LOT further NW of the old center...by about 60-70 miles. It's a short term motion of about 30 mph. The LLC just got sucked up...

[tropicwatch]

According to my google map ruler it is approximately 60 miles NW of the last reported center.

[fasterdisaster]

Would a landfall in AL/FL panhandle mean less or more time over water than a landfall around NOLA? I'm guessing slightly more since a center relocation wouldn't affect the synoptics and it would take longer for Isaac to make its way over there than to LA (which juts out into the Gulf).

[TwisterFanatic]

Don't think it's actually that much farther north of the original center.

I maybe wrong though.

It's a LOT further NW of the old center...by about 60-70 miles. It's a short term motion of about 30 mph. The LLC just got sucked up...

Ah, I see. Somebody said NE and it got me confused.