Tiny Tim Storms

[Ptarmigan]

Tiny Tim Storms are defined as short lived and small storms. They are detected by satellite. It would not be surprising if there are seasons more active than 2005. 1887 and 1933 come to mind.

http://www.climateaudit.org/?p=6025

Has a list of of them going back to 1988. TS Erin of 2007 is listed as one of them.
http://www.climateaudit.org/?p=2474

[Pedro Fernández]

Very, very interesting...........................

I am reading this document but, do you think last INVEST92L could be included inside Tiny Tim Storms category?

[BigA]

I would say that Invest 90L from May might have become a short-lived tropical storm just before hitting Alabama.

[Macrocane]

I would say that Invest 90L from May might have become a short-lived tropical storm just before hitting Alabama.

I don't think ao, it was kind of a disorganized system, but the Azores storm (Invest 92) is a different story that could be a tiny tim .

[BigA]

I would argue that the Azores system(92L) was too far north to be anything more than maybe subtropical, but that 90L got somewhat better organized right before makign landfall. Its convection certainly increased, and the Alabama coast recorded a 52 mph gust and a pressure drop to 1003.9 mb. In any case, if 90L had been classified, I guess it would not have technically fit the criteria for tiny tim storms, because of the 52 mph gust.

[Macrocane]

I would argue that the Azores system(92L) was too far north to be anything more than maybe subtropical, but that 90L got somewhat better organized right before makign landfall. Its convection certainly increased, and the Alabama coast recorded a 52 mph gust and a pressure drop to 1003.9 mb. In any case, if 90L had been classified, I guess it would not have technically fit the criteria for tiny tim storms, because of the 52 mph gust.

You've got a point it would have been a subtropical tiny tim. We will see on the post-season re-analysis if any of these systems get classified.

[MGC]

92L (Azores) was over water too cold to be warm core. 90L (GOM) likely was warm core....MGC

[Pedro Fernández]

92L (Azores) was over water too cold to be warm core. 90L (GOM) likely was warm core....MGC

I don't agree; this is not a logical consequence. This kind of small perturbations have a different origin than pure tropical cyclones which are born from a tropical wave. I have realized that tropical cyclones which are born (tropical transition) from extratropical lows (cutoff lows), have different properties than the others: are smaller, often they don't reach a high intensity (not higher than category 2), and are stronger against unfavorable environmental conditions.

Because a perturbation is born over cool or cold waters, it can't get a warm core, its not logical in my opinion. In suitable conditions, liberation of latent heat only from convection (limited in feed, due to the cool/cold waters) can be very high anyway, and to intervene in an active way to intensify the disturbance, as we have seen in some cases over the Eastern Atlantic.

Please, remember little VINCE in 2005: it was born over 22ºC waters and classified as category one hurricane, and tropical depression when it reached Spain. Another case of unsual tropical development: hurricane IVAN, in 1980 season. It was born from an extratropical low. That low was born from a deep polar trough with a big cold discharge (a very big area of small cumulonimbus clouds behind a cold front)

[cycloneye]

I take the middle ground and I say 92L was Sub-Tropical at one point.

[Category 5]

92L (Azores) was over water too cold to be warm core. 90L (GOM) likely was warm core....MGC

*cough cough* EPSILON! *cough*

[Pedro Fernández]

92L (Azores) was over water too cold to be warm core. 90L (GOM) likely was warm core....MGC

*cough cough* EPSILON! *cough*

Yep.................................. I would even say EPSILOOOOOOOOOOOOOOONG As it was called in everywhere....................!

It developed from a tropical transition of an extratropical low (cutoff low, one more time). I made a video-tribute, if you want to see it:
http://www.youtube.com/watch?v=1zTXU_IZKSU

[Cyclone1]

I made a video-tribute, if you want to see it:
http://www.youtube.com/watch?v=1zTXU_IZKSU

You have excellent taste in music! ;D