Descriptive terms of wind speeds

Beaufort Force		Descriptive Term	Wind Speed(Knot)	Wind Speed(km/h)

   0			   Calm			   < 1			   < 2
   1			   Light		   1 - 3		   2 - 6
   2			   Light		   4 - 6		   7 - 12
   3			   Moderate		   7 - 10		   13 - 19
   4			   Moderate		   11 - 16		   20 - 30
   5			   Fresh		   17 - 21		   31 - 40
   6			   Strong		   22 - 27		   41 - 51
   7			   Strong		   28 - 33		   52 - 62
   8			   Gale			   34 - 40		   63 - 75
   9			   Gale			   41 - 47		   76 - 87
   10			   Storm		   48 - 55		   88 - 103
   11			   Storm		   56 - 63		   104 - 117
   12			   Hurricane		   >= 64		   >= 118