Quote:
  I am interested in the cloudiness associated with an upper-level low and a weak surface low that is in the Gulf. NHC said development, if any, would be slow to occur.  What are the chances for development?  I know all eyes are on Ophelia at the moment but if anyone could give me an explanation of this I would appreciate it. 
 
 
  
  Tropical systems develop from lower level lows. For one to develop from an upper level low, that upper level low first has to spawn a lower level low. This is why the chances are low - such spawning isn't common except on very strong upper level systems, and even then it is rare.
 
 
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