Subtropical storm over Canary Islands ? (Is invest 90L)

[DanieleItalyRm]

Extratropical low over Canaries Islands, was isolated and acquired tropical characteristics and warm air in the center by nortwest Africa..

[DanieleItalyRm]

[Hurricane Jed]

Is it for certain this is subtropical? Could this become Arlene?

[HURAKAN]

Another interesting system in the NE Atlantic

[cycloneye]

Sandy,I say very interesting.

[DanieleItalyRm]

[Florida1118]

Is there a met that could clear this up? We need your help as always

[cycloneye]

A much closer view.

[HURAKAN]

It may look like a subtropical system, but I would think that given the location, time of the year, coverage of the convection and time it has lasted, it's far from tropical. I had a conversation with a hurricane expert, I reserve to say the name for obvious reasons, and that person expressed how difficult it was sometimes to distinguish between a non-tropical cyclone and a subtropical cyclone in these cases. Some of these systems have characteristics that make them look like a tropical or subtropical cyclone, including tight cores in strong ones, but they're still non-tropical cyclones.

If I had to bet with this system, I would bet it's still non-tropical. Satellite images can be very misleading sometimes.

[Hurricane Jed]

It may look like a subtropical system, but I would think that given the location, time of the year, coverage of the convection and time it has lasted, it's far from tropical. I had a conversation with a hurricane expert, I reserve to say the name for obvious reasons, and that person expressed how difficult it was sometimes to distinguish between a non-tropical cyclone and a subtropical cyclone in these cases. Some of these systems have characteristics that make them look like a tropical or subtropical cyclone, including tight cores in strong ones, but they're still non-tropical cyclones.

If I had to bet with this system, I would bet it's still non-tropical. Satellite images can be very misleading sometimes.

Kinda like the medicanes that form in the Mediterranean or polar lows?

[HURAKAN]

Kinda like the medicanes that form in the Mediterranean or polar lows?

Polar lows are non-tropical, no question about that, but yes, they usually have a tight core and can have the appearance of tropical cyclones. I think some of the Medicanes may have been tropical or subtropical. I would love to see someone fund some research on the Medicanes.

[HURAKAN]

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[Hurricane Jed]

Kinda like the medicanes that form in the Mediterranean or polar lows?

Polar lows are non-tropical, no question about that, but yes, they usually have a tight core and can have the appearance of tropical cyclones. I think some of the Medicanes may have been tropical or subtropical. I would love to see someone fund some research on the Medicanes.

As would I. This is a supposed tropical cyclone that formed in the Mediterranean in January of 1995. It intrigues me to no end.

[HURAKAN]

Air temp:



Water temp:



Dew point:



Based on these observations, it's non-tropical.

[DanieleItalyRm]

I think, if this system moved front coast of south Carolina, would be called subtropical system.

You remember unnamed January 2010?
http://www.youtube.com/watch?v=hYjzOawj ... r_embedded

or Invest92 Jun 2009?
http://forum.meteonetwork.it/meteorolog ... zorre.html

[DanieleItalyRm]

I think it will dissipate in the next hours..

[HURAKAN]

I think, if this system moved front coast of south Carolina, would be called subtropical system.

You remember unnamed January 2010?
http://www.youtube.com/watch?v=hYjzOawj ... r_embedded

or Invest92 Jun 2009?
http://forum.meteonetwork.it/meteorolog ... zorre.html

Satellite images are just one tool to help determine if the system is tropical or not. But it's very imperative to look at the sea-surface temperatures, environmental temperatures, dew points, etc, to determine if the core is tropical or not. It's possible that a system like that could become tropical or subtropical near the South Carolina coast thanks to the Gulf Stream, but the Canary Current is the complete opposite, which doesn't help in cyclogenesis.

[DanieleItalyRm]

[tolakram]

Cool looking storm, but I don't think it has very many, if any, tropical characteristics.

Looking at the MIMIC-TPW loop you can see that very little low level moisture is associated with this storm.



This tells me that there just isn't anything "tropical" about it.

[HURAKAN]

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