Thursday, April 20, 2017

TO ME THIS IS NOT NORMAL TO SEE SUB-TROPICAL TURN TROPICAL IN 19°C TEMPS

Hmm... this satellite imagery shows a better overall cloud pattern tropical not sub-tropical and just check this system has transitions to a tropical depression in 19°C sea surface temps. Geo-Storm or what, it makes you wonder. There are no logic's behind this, when these tropical systems are defying all meteorological standards of a tropical system development in an unfavorable environment. You can almost begin to name this one since it has an eye like feature.

NHC says "This transition is a common process..." I say yes it would be to see a sub-tropical system turn tropical in nature, but not in 19°C seas surface temps. This is not a normal transition folks.  19°C = 66.2°F...Tropical.

Wiki:
There are six main requirements for tropical cyclogenesis: sufficiently warm sea surface temperatures, atmospheric instability, high humidity in the lower to middle levels of the troposphere, enough Coriolis force to develop a low pressure center, a preexisting low level focus or disturbance, and low vertical wind shear.

Normally, an ocean temperature of 26.5 °C (79.7 °F) spanning through at least a 50-metre depth is considered the minimum to maintain the special mesocyclone that is the tropical cyclone.[3] These warm waters are needed to maintain the warm core that fuels tropical systems. This value is well above 16.1 °C (60.9 °F), the global average surface temperature of the oceans.


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