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README.md

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-This dataset is a subset of the GraphBench weatherforecasting dataset. It includes the first ... graphs obtained by choosing a smaller time window  starting at ... . Similar to the main dataset a train/test split does not occur directly in the data. 
+This dataset is a subset of the GraphBench weatherforecasting dataset. It includes the first 1500 graphs obtained by choosing a smaller time window  starting at 1979. Similar to the main dataset a train/test split does not occur directly in the data as the original split is not applicable anymore. All data shown in the subsample originate from the training dataset.  
 
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 license: apache-2.0