Reconstruction of number of storms per year. Winds from SO-NO (225 to 315 degrees)
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year
# recons. cat. 2 storms (HM0 => 2.0 m)
Yearly percentage of days with data (0 means no data and 100 means all the days have wind data)

This data has been produced from HM0 values from HIPOCAS and ICOADS databases

Worley, S.J., S.D. Woodruff, R.W. Reynolds, S.J. Lubker, and N. Lott. 2005: ICOADS Release 2.1 data and products. Int. J. Climatol. (CLIMAR-II Special Issue), 25, 823-842 (DOI: 10.1002/joc.1166).