Datasets

Atmospheric Model Sub-seasonal forecast, VI-iii-b: Weekly means of individual ensemble members - Pressure levels

The following fields are weekly means computed from data of the daily individual forecast runs (section VI-v) for the individual ensemble members. The fields are provided in GRIB code.

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Atmospheric Model Sub-seasonal forecast, VI-iv-a: Weekly mean anomalies of individual ensemble members - Single level

The following products correspond to the products in section VI-iii with the model climate mean subtracted. The model climate is derived from hindcast statistics. The fields are provided in GRIB code.

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Atmospheric Model Sub-seasonal forecast, VI-iv-b: Weekly mean anomalies of individual ensemble members - Pressure levels

The following products correspond to the products in section VI-iii with the model climate mean subtracted. The model climate is derived from hindcast statistics. The fields are provided in GRIB code.

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Atmospheric Model Sub-seasonal forecast, VI-v-a: Individual forecast runs - 6-hourly - Single level

The products contain values for each ensemble member of the Monthly Prediction System plus the equivalent hindcast products. The fields are provided in GRIB code.

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Atmospheric Model Sub-seasonal forecast, VI-v-b: Individual forecast runs - 12-hourly - Pressure levels

The products contain values for each ensemble member of the Monthly Prediction System plus the equivalent hindcast products. The fields are provided in GRIB code.

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Atmospheric Model Sub-seasonal forecast, VI-v-c: Individual forecast runs - 6-hourly - wave

The products contain values for each ensemble member of the Monthly Prediction System plus the equivalent hindcast products. The fields are provided in GRIB code.

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Atmospheric Model Sub-seasonal forecast, VI-v-d: Individual forecast runs - 12-hourly - potential vorticity levels

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Atmospheric Model Sub-seasonal forecast, VI-vi-a: Probabilities - Weekly averaged

The fields provide the probabilities of the occurrence of weather events at each grid point. Weather events are either averaged or accumulated over a period of one week. The products are provided in GRIB code.

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Atmospheric Model Sub-seasonal forecast, VI-vi-b: Probabilities - Weekly accumulated

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Probabilities: visibility

This chart shows probability information regarding visibility near the surface derived from the ...

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Probabilities: maximum of 10 m wind gust, last 24 hours

This chart shows probability information regarding the maximum gust at 10 m above the earth's ...

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Probabilities: total precipitation, last 24 hours

This chart shows probability information regarding 24 hour total precipitation derived from the ...

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Probabilities: mean wave period (day 10-15)

These charts show the probability of various mean periods of ocean waves 10-15 days ahead. The ...

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Probabilities: significant wave height (day 10-15)

These charts show probability of various heights of significant waves 10-15 days ahead. The ...

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Probabilities: 100 m wind speed

This chart shows probability information regarding wind speeds at 100 m above the earth's ...

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Probabilities: CAPE shear

This chart shows probability information regarding CAPE shear derived from the ECMWF ensemble ...

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Probabilities: MUCAPE

This chart shows probability information regarding MUCAPE derived from the ECMWF ensemble (ENS) ...

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Rain and mean sea level pressure

Precipitation totals include all precipitation types (rain, snow etc.) (in mm of rainfall or rainfall equivalent) falling in 6 hour or 12 hour periods using colour shading...

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Ranked probability skill score (RPSS) of 2 m temperature (week 3; day 15-21)

This diagram gives a measure of the effectiveness of the model. ...

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Reference analysis experiment with ECMWF IFS for the EUREC4A period at 25km resolution

Research analysis experiment produced with ECMWF IFS cycle 47R1, at TCo399 (25km), for the EUREC4A field campaign (15.01.2020-14.02.2020). As in the operational analysis, the radiosondes and dropsondes launched in the campaign are assimilated.

Examples

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Reference seasonal experiment for winter 1997/98: R98

4-month long 101-ensemble member seasonal reference experiment (R98) initialised on 01-November-1997 using the atmosphere-only version of SEAS5 (see Johnson et al., 2019) forced with daily ERA5 SST.

Examples

retrieve, class=rd, date=1997-11-01, expver=hosm, fcmonth=1/2/3/4, levtype=pl, levelist=500, method=1, number=0/to/100, origin=ecmf, param=z, stream=msmm, system=5, time=00:00:00, type=fcmean, target="output_z500.grib"

Monthly mean Geopotential at 500 hPa

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Reference seasonal experiment for winter 2015/16: R16

4-month long 101-ensemble member seasonal reference experiment (R16) initialised on 01-November-2015 using the atmosphere-only version of SEAS5 (see Johnson et al., 2019) forced with daily ERA5 SST.

Examples

retrieve, class=rd, date=2015-11-01, expver=hosn, fcmonth=1/2/3/4, levtype=pl, levelist=500, method=1, number=0/to/100, origin=ecmf, param=z, stream=msmm, system=5, time=00:00:00, type=fcmean, target="output_z500.grib"

Monthly mean Geopotential at 500 hPa

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Reference seasonal experiment for winter 2019/20: R20

4-month long 101-ensemble member seasonal reference experiment (R20) initialised on 01-November-2019 using the atmosphere-only version of SEAS5 (see Johnson et al., 2019) forced with daily ERA5 SST.

Examples

retrieve, class=rd, date=2019-11-01, expver=hosi, fcmonth=1/2/3/4, levtype=pl, levelist=500, method=1, number=0/to/100, origin=ecmf, param=z, stream=msmm, system=5, time=00:00:00, type=fcmean, target="output_z500.grib"

Monthly mean Geopotential at 500 hPa

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AIFS ENS Control: 500 hPa geopotential height and 850 hPa temperature

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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AIFS ENS Control: Mean sea level pressure and 200 hPa wind

Wind speed at 200 hPa highlights the jet stream (areas of strong winds in the upper troposphere) which can help identify movement and development of depressions...

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