It should also be clear it does not matter that the uncertainty is higher in the early part of the record, since these years will never become record years anyhow (as a consequence of global warming). (realclimate.org)
[Response: There is a chance of undercount in the early part of the record, and I believe that nature would think the division of categories is fairly arbritrary as the windspeeds do not necessarily cluster at certain levels (as far as I know anyway...). (realclimate.org)
So we would expect the accuracy to be greatest in the earliest part of the record (1983 - 1987). (realclimate.org)