ATL: ALBERTO - Post-Tropical

[GCANE]

Off-the-scale rain rate recorded on F15's 85GHz radar.

[GCANE]

Pretty dramatic drop in surface pressure recorded on the Yucatan Buoy (42056).

[USTropics]

Looks like a squall line developed due to the difference in vertical wind shear, probably some impressive lightning in there:

[USTropics]

Can see the lightning strikes using WeatherNerd's Floater page

[NDG]

This is where the low pressure center I think is this morning, still somewhat broad but getting better defined. Surface pressures are starting to fall in the area, this could very well be a TD by this afternoon, IMO.

[USTropics]

 https://twitter.com/ZachWPDE/status/999965454075682817

[kevin mathis]

You can also clearly see the where the llc is now on, or just off the coast

[caneman]

This is where the low pressure center I think is this morning, still somewhat broad but getting better defined. Surface pressures are starting to fall in the area, this could very well be a TD by this afternoon, IMO.

Agree. I've seen far worse classified. Prolly a good idea to get it classified with a busy holiday weekend upon us.

[SouthDadeFish]

One would think with the current level of organization and how close 90L is to the coastline that potential TC advisories would be issued.

[caneman]

One would think with the current level of organization and how close 90L is to the coastline that potential TC advisories would be issued.

Couple that with the holiday weekend. Would be wise to get the word out before people go about their holiday weekend.

[kevin mathis]

What is everyone's best guess for for areas that Tropical Storm warning will be hoisted, by breakpoints?
Because Alberto is likely to be a lopsided storm I go with...
TS Warnings for Keys south of Marathon
TS Warnings from Sanibel island to Mouth of Mississippi River.

[northjaxpro]

I am awaiting visible imagery, but IR appears to be confirming main vort at the Yucatan Peninsula coast. It may be enough for NHC to classify. I think NHC will wait for Recon to confirm later this afternoon.

[caneman]

I am awaiting visible imagery, but IR appears to be confirming main vort at the coast. Ir may be enough for BHC to classify. I think NHC will wait for Recon to confirm later this afternoon.

I'd be surprised if they wait. With the holiday weekend, they will have a much larger audience paying attention in the morning than after noon.

[kevin mathis]

I agree...They wait with no imminent threat. I believe they have no problem closing the circulation off, but do they find the wind to upgrade straight to Alberto?

[caneman]

I agree...They wait with no imminent threat. I believe they have no problem closing the circulation off, but do they find the wind to upgrade straight to Alberto?

Carnival cruise ship showed near T.D. winds but no idea how reliable they consider that.

[caneman]

I agree...They wait with no imminent threat. I believe they have no problem closing the circulation off, but do they find the wind to upgrade straight to Alberto?

If UKMET is to be believed, I believe impacts along the west coast of Florida could be felt within 48 hours.

[jaxfladude]

I hope 90L is not too much of a nuisance when all is said and done and with it being Memorial Day weekend and as we give our thanks and remembrances to the fallen.

[NDG]

I agree...They wait with no imminent threat. I believe they have no problem closing the circulation off, but do they find the wind to upgrade straight to Alberto?

Carnival cruise ship showed near T.D. winds but no idea how reliable they consider that.

Buoy near the deep convection has been reporting 29 mph sustained winds with gusts to 35 mph, good enough for an upgrade if visible satellite this morning confirms an LLC.

[northjaxpro]

I agree...They wait with no imminent threat. I believe they have no problem closing the circulation off, but do they find the wind to upgrade straight to Alberto?

Carnival cruise ship showed near T.D. winds but no idea how reliable they consider that.

Buoy near the deep convection has been reporting 29 mph sustained winds with gusts to 35 mph, good enough for an upgrade if visible satellite this morning confirms an LLC.

NDG, yeah NHC may classify TD with that ship report. We will see.

[caneman]

I agree...They wait with no imminent threat. I believe they have no problem closing the circulation off, but do they find the wind to upgrade straight to Alberto?

Carnival cruise ship showed near T.D. winds but no idea how reliable they consider that.

Buoy near the deep convection has been reporting 29 mph sustained winds with gusts to 35 mph, good enough for an upgrade if visible satellite this morning confirms an LLC.

I dont usually have a problem with recon verification first but I think in this case with the holiday, they would get the word out to far more people in the a.m than p.m. . If UKMET were to bear out, I believe impacts could be felt within 48 hours