def NOWrad_to_lon_lat(xpoints, ypoints, xMin=0, yMin=0):
    """Convert NOWrad x,y grid coordinates to latitude,
    longitude coordinates.
    
    Can even convert a subset of image if you know 
    the west and north edges.
    
    Parameters
    ----------
    xpoints: (N, ) ndarray
        Array of x coordinates to be converted
    ypoints: (N, ) ndarray
        Array of y coordinates to be converted
    xMin: int
        Relative most westward x coordinate if image is clipped
    yMin: int
        Relative most northward y coordinate if image is clipped
    """

    #See: NOWrad Technical Note
    lats = 53 - (yMin + ypoints) * .0180
    lons = (xMin + xpoints) * .0191 - 130
    
    return lons, lats