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Operational NWP In Met Éireann

Met Éireann currently runs the HARMONIE-AROME NWP model.

The operational configuration uses cycle 40h1 of HARMONIE-AROME on the domain shown below, which consists of 1000 x 900 grid points in the horizontal at 2.5km resolution, with 65 levels in the vertical.

A 54-hour forecast is produced four times a day, at 00Z, 06Z, 12Z and 18Z.

This main forecast also acts as the control member for the Irish Regional Ensemble Prediction System (IREPS). Twice a day, at 00Z and 12Z, 10 additional perturbed forecasts are run out to 36 hours, giving an 11 member ensemble for short-range forecasting.

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