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The first year of the AI Weather Quest is divided into four 13-week competitive periods. After each period, and following the end-of-period webinar and forecast evaluation, submitted forecasts are made publicly available following the schedule below (where each acronym refers to the forecasted months, i.e. SON is September, October, November):

Competition periodRelease date
SON 202512th December 2025
DJF 2025/202616th March 2026
MAM 202615th June 2026
JJA 202614th September 2026

Portal directory structure

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  • Categorised by forecast initialisation date: 
     [ROOT]/by_fc_date/[fc_init_date]/[teamname]/[modelname]/[forecast_file]
  • Categorised by team:
     [ROOT]/by_team/[teamname]/[modelname]/[fc_init_date]/[forecast_file]

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  • Forecast initialisation date:

     [ROOT]/by_fc_date_zipfiles/[fc_init_date].zip
  • Team:
     [ROOT]/by_team_zipfiles/[teamname].zip

The following are examples use the wget functionality:

Download near-surface temperature forecasts initialised on the 14th August 2025, for the first forecasting period, and submitted by team AIFS under the model name AIFSgaia:

     wget https://data.ecmwf.int/ai-weatherquest/by_fc_date/20250814/AIFS/AIFSgaia/tas_20250814_p1_AIFS_AIFSgaia.nc

Download all forecasts submitted by team AIFS throughout the competition:

     wget https://data.ecmwf.int/ai-weatherquest/by_team_zipfiles/AIFS.tar.gz

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Finally, we recommend using the following tar command to unzip zip files.

     tar -czf [zip_file] [new_directory]
     tar -czf AIFS.tar.gz AIFS_forecasts/

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