# Follow these conventions to be able to render your own clouds:

- Dimensions:
time            /* of size UNLIMITED or 1 */
vertical_levels /* of any size */
S_N_direction   /* of any size */
W_E_direction   /* of any size */

- Variables:

W_E_direction(W_E_direction) and S_N_direction(S_N_direction)
/* two one-dimensional arrays of increasing values, giving the 
 * coordinates of the center of each cell along the x and y axis 
 * respectively. They must be uniformly spaced and their width must be 
 * the same along both axis.  The corner of the first cell is assumed to 
 * be at (0,0). Unit must be proportional to meters (e.g. km works) */

vertical_levels(vertical_levels)
/* a one-dimensional array of increasing values, giving the coordinates 
 * of the center of the cells along the vertical axis. They do not need 
 * to be uniformly spaced e.g. layers can be of varying depths. Units 
 * must be the same as the x-y coordinates*/

RVT(time, vertical_levels, S_N_direction, W_E_direction)
/* four-dimensional array with only one point in the time dimension, 
 * giving the water vapor mixing ratio in each grid cell; in kg of water 
 * per kg of dry air */

RCT(time, vertical_levels, S_N_direction, W_E_direction)
/* four-dimensional array with only one point in the time dimension, 
 * giving the cloud liquid water mixing ratio in each grid cell; in kg 
 * of water per kg of dry air.*/

PABST(time, vertical_levels, S_N_direction, W_E_direction)
/* four-dimensional array with only one point in the time dimension, 
 * giving the pressure in each grid cell in Pascal.*/

THT(time, vertical_levels, S_N_direction, W_E_direction)
/* four-dimensional array with only one point in the time dimension, 
 * giving the potential temperature in each grid cell in Kelvin.*/