Mid month anticyclonic spell?

The ECMWF model seems to have been underperforming recently and in its latest run it does seem to be at odd with the GFS model. For example the ECMWF model predicts a fairly strong zonal westerly for a week on Thursday.

Meanwhile the GFS model is forecasting an intense anticyclone with a central pressure of 1049 hPa. Both models can’t be right, and certainly the pressure of this anticyclone must be way too high.

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