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Forecast precipitation is considered to be snow if the model atmosphere above and at the ground surface is forecast to be below 0°C. Where the ground surface lies near the 0°C level...

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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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Lower values mean that more radiation is absorbed at the earth's surface while higher values mean more is reflected back to space. Albedo depends on the characteristics of the underlying surface and...

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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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This chart shows the spatial variation in the Relative Operating Characteristics (ROC) skill ...

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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 shows the spatial variation in the Anomaly Correlation Coefficient (ACC) for the ...

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

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The charts show totals of large scale precipitation, convective precipitation, and the total of precipitation during the 6 hour period previous to the selected validity time...

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These charts show the rate of fall of large scale precipitation, the rate of fall of convective precipitation, the rate of fall of snowfall, or the rate of fall of all precipitation...

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Where precipitation is forecast, a type of precipitation can be assigned according to the temperature structure of the model atmosphere that includes the layers through which the model precipitation falls...

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This product is derived from an ensemble of 50 model runs plus Control. The chart shows ...

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This chart shows probabilities for the 7-day mean anomalies of precipitation to be in defined ...

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This chart shows probabilities that 7-day-total precipitation (from the 101 forecast members) ...

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This chart shows 7-day mean anomalies of precipitation accumulation amounts from the ECMWF ...

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This chart shows probability information regarding 10 m wind gust derived from the ECMWF ...

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These charts are derived from the ECMWF ensemble forecast (ENS) system and show probability of ...

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This chart shows probability information regarding dew point temperature 2 m above the ground derived from the ECMWF ensemble (ENS) at the validity time...

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These charts are derived from the ECMWF ensemble forecast (ENS) system and show probability of 2 ...

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These charts are derived from the ECMWF ensemble forecast (ENS) system. They show probability ...

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The CAT (Clear Air Turbulence) parameter is given in units of the turbulent Eddy Dissipation ...

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This chart shows probability information regarding freezing rain derived from the ECMWF ensemble ...

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This chart shows probability information regarding lightning flash density derived from the ...

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This chart shows probability information regarding maximum temperature 2 m above the ground derived from the ECMWF ensemble (ENS) during the 6 hour period preceding the validity time...

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This chart shows probability information regarding mean wave period derived from the ECMWF ...

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