The charts show the evolution of existing and potential tropical cyclone activity. ...

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The 850 hPa level is usually just above the boundary layer and at this level the day-night variation in temperature is generally negligible...

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In the northern hemisphere the air rotates anti-clockwise around low contour centres and clockwise around the high contour centres. In the southern hemisphere the air rotates clockwise around low contour centres and ...

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The air flow is not the same at all levels and can be very different in strength and direction when associated with vigorous weather systems...

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These charts show the difference between the latest HRES Long Window Data Analysis (LWDA) for the main synoptic hours of 00, 06, 12 and 18UTC, and its corresponding background field taken from the previous HRES LWDA run with the same validity time...

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These charts show clustering of ENS members based on the 500 hPa height forecasts. ...

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This chart shows the probability that both the wind at 10 m above the earth's surface is ...

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These diagrams compare Continuous Ranked Probability Skill Scores (CRPSS) of ECMWF with ...

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**Note:** In **June 2023** ECMWF implemented a **major upgrade ...**

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These plots compare recent IFS and experimental AIFS daily verification scores for 500 hPa ...

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These charts show areas where anomalous significant wave heights are likely to occur. These charts are based on the ECMWF ense ...

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These charts show the mean and variation in the latest ECMWF ensemble forecast (ENS). ...

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These charts show the mean and variation in the latest ECMWF ensemble forecast (ENS). ...

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These charts show the mean and variation in the latest ECMWF ensemble forecast (ENS). ...

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These diagrams aim to show the time evolution of regimes which are indicative of the likely weather in and around Europe.The winds across the Atlantic can usefully be classified into four regimes ...

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The ECMWF seasonal forecasts (SEAS5) are produced every month with a 51-member ensemble at a ...

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This chart provides information on the verification of forecasts of the number of tropical ...

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This chart shows 7-day mean anomalies for a range of parameters from the ECMWF Sub-seasonal ...

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**Note:** In **June 2023** ECMWF implemented a **major upgrade ...**

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These diagrams show verification scores for significant wave height and 10 m wind for three ...

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These charts show the the wave energy flux (in kW m⁻¹) calculated as the integral, over all forecast wave frequencies and wave directions, of the product of the wave group speed and the two-dimensional energy wave spectrum...

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At any location over the oceans, there is a spectrum of waves which describes how much wave energy is present for given wave frequencies and direction of propagation...

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Significant wave height can be shown to correspond to the average wave height of the top one-third highest waves. The wave period of windsea is generally <10s,...

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open_in_newview in Open Charts

These diagrams compare Continuous Ranked Probability Skill Scores (CRPSS) of ECMWF with ...

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open_in_newview in Open Charts

The ECMWF seasonal forecasts (SEAS5) are produced every month with a 51-member ensemble at a ...

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open_in_newview in Open Charts