Other sources use minima as low as 28 k and maxima as high as 90 k. The 90 k definition is very non-standard . Other sources use minimums as low as 28 k and maximums as high as 90 k. Through 1986 , the National Hurricane Center used the term gale to refer to winds of tropical storm force for coastal areas , between 33 k and 63 k. The 90 k definition is very non-standard .