===== How are Weather Bands defined? =====

We’ve seen how weather bands are used (in terms of flying execution and A2G adjudication).  But what do the weather bands mean?  When users are reviewing or providing data, how are the weather bands defined?

Weather bands are calculated in order, so the first check which evaluates as "true" will define the band.  Ceiling & visibility checks are "or", so either one defines the band.  JAS "meters" are converted to feet (ceiling) and statute miles (visibility) for reference to the values in this table:

	
^Weather Band  ^Ceiling       ^Visibility^
|1	       |< 500	      |< 3   |
|2	       |< 1500	|
|3	       |< 3000	      |< 4|
|4	       |< 6000	      |< 5|
|5	       |< 12000	      |< 6 |
|6	       |All others |