Many Tropical Waves before June 1: What is the highest number of them before June 1?

[cycloneye]

As of the 12z surface analysis by TAFB,there have been 13 tropical waves that had been analized before June 1.I have two questions about this.

If the many waves tell something about how active or not the Hurricane Season will be.

If someone has stats from past years about the highest number of waves being analized before June 1.

Graphic courtesy from Meteovargas.

[cycloneye]

Searching the internet found this data since 2005.The 13 so far before June 1 has 2017 ranking second behind 2010.

[LarryWx]

Searching the internet found this data since 2005.The 13 so far before June 1 has 2017 ranking second behind 2010.

It is interesting to see that the average # of tropical waves since 2005 has been about the same for June-Sep. Obviously, a very small % of them normally develop into a TC in June and then it goes up a little in July followed by a sharp increase for August/Sept.

[Ptarmigan]

Searching the internet found this data since 2005.The 13 so far before June 1 has 2017 ranking second behind 2010.

Interesting to see that 2005 had a lot of tropical waves. 2013 did not have many tropical waves. 2010 and 2016 were within average.

[TheAustinMan]

Does anyone know of a good dataset for the Indian Ocean Dipole (that extends through April 2017)? That may have some relevance to the tropical wave counts in the Atlantic. Positive IOD weakens the west African monsoon circulation.