Try partial_decompress=True about nowcasting_dataset HOT 1 CLOSED

# Pretty sure this sets partial_decompress to True:
import zarr
array = zarr.open_array(
    FILENAME, path='stacked_eumetsat_data', partial_decompress=False, mode='r'
    storage_options=dict(consolidated=True))

%%time
data = array[:12, :128, :128, 0]  # takes about 35 ms with or without partial_decompress.

ds = xr.open_dataset(
    FILENAME, 
    engine='zarr',
    consolidated=True,
    storage_options=dict(partial_decompress=True)
)