MED: (Sub)Tropical Depression over the eastern Mediterranean

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DanieleItalyRm
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MED: (Sub)Tropical Depression over the eastern Mediterranean

#1 Postby DanieleItalyRm » Wed May 20, 2009 11:32 am

First system-In a warm contest, interesting little warm core cyclone over Mediterranean sea
Estofex:
The cut-off over the far eastern Mediterranean continues to move eastwards.
Departing upper low still affects most parts of Turkey. Winds at all levels constantly decrease during the forecast period but remain strong enough for organized thunderstorms (e.g. DLS around 15m/s and augmented directional shear). Scattered thunderstorms are forecast with a large hail/severe wind gust risk as subcloud layer is well mixed with LCLs between 1-2km. Thunderstorms continue well into the night hours.

Max in Rome today +32°C..
Daniele

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Last edited by DanieleItalyRm on Wed Sep 02, 2009 1:11 pm, edited 1 time in total.
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Re: MED: (Sub)Tropical Depression over the eastern Mediterranean

#2 Postby Category 5 » Wed May 20, 2009 12:14 pm

An impressive little system, warm waters, not much shear, but theres no convergence at the surface and no upper level support either, its just a cluster of storms.

Its more impressive than 90L though :lol:
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Derek Ortt

Re: MED: (Sub)Tropical Depression over the eastern Mediterranean

#3 Postby Derek Ortt » Wed May 20, 2009 12:45 pm

there is convergence at the surface, cat5... look at the inflow

from a very quick look... this doesnt look like it'll have enough time to become a depression... but this is far better organized than 90L
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Re: MED: (Sub)Tropical Depression over the eastern Mediterranean

#4 Postby Category 5 » Wed May 20, 2009 12:51 pm

Derek Ortt wrote:there is convergence at the surface, cat5... look at the inflow

from a very quick look... this doesnt look like it'll have enough time to become a depression... but this is far better organized than 90L


Do you have a loop of the area by any chance? I cant find one.
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Re: MED: (Sub)Tropical Depression over the eastern Mediterranean

#5 Postby DanieleItalyRm » Wed May 20, 2009 1:07 pm

unfortunately in limit Est visible Sat:
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In this moment in dissipation:
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Last edited by DanieleItalyRm on Wed May 20, 2009 1:33 pm, edited 2 times in total.
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Derek Ortt

Re: MED: (Sub)Tropical Depression over the eastern Mediterranean

#6 Postby Derek Ortt » Wed May 20, 2009 1:19 pm

I dont have a sat loop of the region, unfortunately.

would need a color IR shot to be sure. But the vis is surely impressive
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Re: MED: (Sub)Tropical Depression over the eastern Mediterranean

#7 Postby DanieleItalyRm » Wed May 20, 2009 1:38 pm

Many Thanks for attention

Vorticity:
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The low have 1008 hpa, unfortunately the European maps not good for identification little mediterranean storms (real winds,pressure,core,ecc).
Little loop:
http://wind.met.fu-berlin.de/cgi-bin/me ... ode=Endlos

Click infrared and >>> for Ir archive:
http://www.sat24.com/history.aspx?country=gr
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Re: MED: (Sub)Tropical Depression over the eastern Mediterranean

#8 Postby Category 5 » Wed May 20, 2009 2:11 pm

Vorticity is mighty impressive.
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Re: MED: (Sub)Tropical Depression over the eastern Mediterranean

#9 Postby KWT » Wed May 20, 2009 2:31 pm

I suspect given the area it was in its highly probable that it was a warm core system by the time it reached its peak, SST's are warm enough as well it seems, these mediterranean systems do seem to occur fairly often don't they!
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Re: MED: (Sub)Tropical Depression over the eastern Mediterranean

#10 Postby DanieleItalyRm » Wed May 20, 2009 4:38 pm

The little low circulation keeps rotating even though weakened..
but it is clearly a depression, look loop sat
You often dont consider the particularity of Mediterranean climate..
the big warm air and flux from north Africa helps depressions to become in warm core system.
Daniele
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Re: MED: (Sub)Tropical Depression over the eastern Mediterranean

#11 Postby Derek Ortt » Wed May 20, 2009 5:25 pm

the reason why I cannot say that it is a depression is because of the nature of the definition of tropical depression. I would need an IR loop to be sure.

Closed low is there... not sure about the organized convection persisting around the center
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Re: MED: (Sub)Tropical Depression over the eastern Mediterranean

#12 Postby MGC » Wed May 20, 2009 6:01 pm

Did you notice all the dust that is being drawn into the circulation from Egypt?....MGC
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Re: MED: (Sub)Tropical Depression over the eastern Mediterranean

#13 Postby HURAKAN » Wed May 20, 2009 8:49 pm

Loop: http://oiswww.eumetsat.org/IPPS/html/MS ... /index.htm

Click on "24."

Looking at the loop, there doesn't seems to be anything at the surface, it seems to have been a mid-level or upper-level feature. Something that you need for tropical development is persistent convection over a LLC for at least 24 hours or more. This system just forms and poofs away. No tropical or subtropical system in my opinion.
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#14 Postby DanieleItalyRm » Wed Sep 09, 2009 2:15 pm

the second warm core system occured over Balearic Island on 12 August over +27.5°C sea surface.
The tundestorm low formed an aye in the final part of the event.
winds 40-56 km/h (22-30 knts).

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third system occured over Gulf of Lion over +24°C sea surface and moved over Ligurian sea on +26°C sea surface.
in the final part the event not very high convection.
28-37 Km/h (15-20 knts)

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This is the third system of the last year- 2008
sea surface + 25.5°C
45 knts

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Probably this is a normal two mediterranean Tropical Storm (but i could show many other systems from last years)
occured in September 1999 over +26.5°C sea surface
96 km/h (52 knts)

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other storm occured in July 1999 over +27.5°C sea surface
75 km/h (40 knts)

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These systems are not real Medicanes (Mediterranean Hurricane 1947, '69, '76, '82, '83, '95, '96, '05) because they don't present the structure of a hurricane. They are like a tropical storm or depression.
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