| NONE |                             string
 |                                         Clear and dry. |         
                              | 
                            
        
                            | DAMP |                             string
 |                                         A wee bit wet. |         
                              | 
                            
        
                            | WATER |                             string
 |                                         Wet or water patches. |         
                              | 
                            
        
                            | FROST |                             string
 |                                         Rime or Frost covered (depth less than 1 mm) |         
                              | 
                            
        
                            | DRY_SNOW |                             string
 |                                         Snow which can be blown if loose or, if
compacted by hand, will fall apart again upon release;
specific gravity: up to but not including 0.35. |         
                              | 
                            
        
                            | WET_SNOW |                             string
 |                                         Snow which, if compacted by hand, will stick
together and tend to or form a snowball; specific
gravity: 0.35 up to but not including 0.5. |         
                              | 
                            
        
                            | SLUSH |                             string
 |                                         Water-saturated snow which with a heel-and-toe slapdown
motion against the ground will be displaced with a
splatter; specific gravity: 0.5 up to 0.8.
Note.- Combinations of ice, snow and/or standing water
may, especially when rain, rain and snow, or snow is falling,
produce substances with specific gravities in excess of 0.8.
These substances, due to their high water/ice content, will
have a transparent rather than a cloudy appearance and, at
the higher specific gravities, will be readily distinguishable
from slush. |         
                              | 
                            
        
                            | ICE |                             string
 |                                         Ice. |         
                              | 
                            
        
                            | COMPACT_SNOW |                             string
 |                                         Snow which has been compressed
into a solid mass that resists further compression and
will hold together or break up into lumps if picked up;
specific gravity: 0.5 and over. |         
                              | 
                            
        
                            | RUT |                             string
 |                                         Frozen ruts or ridges. |         
                              | 
                            
        
                            | ASH |                             string
 |                                         Ash from volcanic activity. |         
                              | 
                            
        
                            | SAND |                             string
 |                                         Sand. |         
                              | 
                            
        
                            | OIL |                             string
 |                                         Oil and gas. |         
                              | 
                            
        
                            | RUBBER |                             string
 |                                         Rubber deposits. |         
                              | 
                            
        
                            | GRAS |                             string
 |                                         Overgrown grass |         
                              | 
                            
        
                            | OTHER |                             string
 |                                         Other |         
                              |