Global Forecast System (GFS) 500 hPA Anomaly Correlation: Length of Forecast Considered Accurate (days)2017-09-30T00:00:008.25Global Forecast System (GFS) 500 hPA Anomaly Correlation: Length of Forecast Considered Accurate (days)2018-09-30T00:00:008.35Global Forecast System (GFS) 500 hPA Anomaly Correlation: Length of Forecast Considered Accurate (days)2019-09-30T00:00:008.48.41MetGlobal Forecast System (GFS) 500 hPA Anomaly Correlation: Length of Forecast Considered Accurate (days)2020-09-30T00:00:008.378.40.996429MetGlobal Forecast System (GFS) 500 hPA Anomaly Correlation: Length of Forecast Considered Accurate (days)2021-09-30T00:00:008.318.50.977647MetGlobal Forecast System (GFS) 500 hPA Anomaly Correlation: Length of Forecast Considered Accurate (days)2022-09-30T00:00:008.448.60.98MetGlobal Forecast System (GFS) 500 hPA Anomaly Correlation: Length of Forecast Considered Accurate (days)2023-09-30T00:00:008.458.60.98MetGlobal Forecast System (GFS) 500 hPA Anomaly Correlation: Length of Forecast Considered Accurate (days)2024-09-30T00:00:008.6Global Forecast System (GFS) 500 hPA Anomaly Correlation: Length of Forecast Considered Accurate (days)2025-09-30T00:00:008.6