Large differences in GFS and ECMWF models


The GFS and ECMWF aren’t seeing eye to eye regarding the low that’s spinning up on Friday to the southwest of IONA. This feature could push up an occluding front into the south threatening another spell of snow, but the GFS is having none of that. How the models handle significant feature such as this obviously will modify the output beyond T+120, and so by T+240, the GFS maintains have very different solution to ECWF, maintaining a cold trough across the UK whilst the ECMWF are going for a full on zonal mobile westerly.


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