2021-06-28 00:04:34,307 WARNING  grid           zgrid: Less than 2% of the grid has data; quitting.
    Returning all values masked.
2021-06-28 00:04:34,308 WARNING  grid           zgrid: Less than 2% of the grid has data; quitting.
    Returning all values masked.
2021-06-28 00:04:35,737 WARNING  grid           zgrid: Less than 2% of the grid has data; quitting.
    Returning all values masked.
2021-06-28 00:04:35,738 WARNING  grid           zgrid: Less than 2% of the grid has data; quitting.
    Returning all values masked.
2021-06-28 00:04:36,141 WARNING  grid           zgrid: No data
    Returning all values masked.
2021-06-28 00:04:36,142 WARNING  grid           zgrid: No data
    Returning all values masked.
2021-06-28 00:04:36,441 WARNING  grid           zgrid: No data
    Returning all values masked.
2021-06-28 00:04:36,441 WARNING  grid           zgrid: No data
    Returning all values masked.
2021-06-28 00:09:41,116 WARNING  grid           zgrid: Range of input values = 0; check input.
    Returning all values masked.
2021-06-28 00:09:41,117 WARNING  grid           zgrid: Range of input values = 0; check input.
    Returning all values masked.
2021-06-28 00:09:41,449 WARNING  grid           zgrid: Range of input values = 0; check input.
    Returning all values masked.
2021-06-28 00:09:41,450 WARNING  grid           zgrid: Range of input values = 0; check input.
    Returning all values masked.
2021-06-28 00:14:34,031 WARNING  grid           zgrid: Range of input values = 0; check input.
    Returning all values masked.
2021-06-28 00:14:34,032 WARNING  grid           zgrid: Range of input values = 0; check input.
    Returning all values masked.
2021-06-28 00:14:34,330 WARNING  grid           zgrid: Range of input values = 0; check input.
    Returning all values masked.
2021-06-28 00:14:34,331 WARNING  grid           zgrid: Range of input values = 0; check input.
    Returning all values masked.