AI Weather Prediction (AIWP) Model Reforecasts

This is an archive of pure AI-based weather prediction reforecasts produced collaboratively between the Cooperative Institute for Research in the Atmosphere (CIRA)  and the NOAA Global Systems Laboratory (NOAA-GSL) .

Currently, FourCastNetv2-small , Pangu-Weather , and GraphCast  are included, with more models to come. Each of these models has been initialized with both NOAA GFS  (directories with no extension) and ECMWF IFS  initial conditions (directories ending in "_IFS"). The datasets are updated with near-real-time data twice per day (00Z and 12Z initializations).

FourCastNetv2-small and Pangu-Weather are available from 10/2020 to present, while GraphCast is available from 01/2022 to present. These periods are selected to avoid overlap with training and fine-tuning periods for each model. Data may be missing and is not guaranteed to be available at any given time. If there is data missing that you require, please email jacob.radford@noaa.gov .

For real-time visualizations, visit our visualizations page .

The directory structure is as follows:
s3://noaa-oar-mlwp-data/MMMM_vNNN_III/YYYY/mmdd/MMMM_vNNN_III_YYYYmmddhh_fXXX_fYYY_ZZ.nc; where
MMMM = Four character model code (FOUR, PANG, or GRAP)
NNN = Three digit version number (currently 100 or 200)
YYYY = Four digit year
mm = Two digit month
dd = Two digit day
III = Three character initial condition system (GFS)
hh = Two digit initialization time (00, 06, 12, or 18)
XXX = Three digit first forecast hour of file (currently 000 for all files)
YYY = Three digit last forecast hour of file (currently 240 for all files)
ZZ = Two digit forecast step (currently 06 for all files)

• FourCastNet v2-small:
  • 10-m u wind component
  • 10-m v wind component
  • 100-m u wind component
  • 100-m v wind component
  • 2-m temperature
  • Surface pressure
  • Mean sea level pressure
  • Total column integrated water vapor
  • Geopotential at: [1000, 925, 850, 700, 600, 500, 400, 300, 250, 200, 150, 100, 50] hPa
  • Temperature at: [1000, 925, 850, 700, 600, 500, 400, 300, 250, 200, 150, 100, 50] hPa
  • U wind component at: [1000, 925, 850, 700, 600, 500, 400, 300, 250, 200, 150, 100, 50] hPa
  • V wind component at: [1000, 925, 850, 700, 600, 500, 400, 300, 250, 200, 150, 100, 50] hPa
  • Relative humidity at: [1000, 925, 850, 700, 600, 500, 400, 300, 250, 200, 150, 100, 50] hPa
• Pangu-Weather:
  • 10-m u wind component
  • 10-m v wind component
  • 2-m temperature
  • Mean sea level pressure
  • Geopotential at: [1000, 925, 850, 700, 600, 500, 400, 300, 250, 200, 150, 100, 50] hPa
  • Temperature at: [1000, 925, 850, 700, 600, 500, 400, 300, 250, 200, 150, 100, 50] hPa
  • U wind component at: [1000, 925, 850, 700, 600, 500, 400, 300, 250, 200, 150, 100, 50] hPa
  • V wind component at: [1000, 925, 850, 700, 600, 500, 400, 300, 250, 200, 150, 100, 50] hPa
  • Specific humidity at: [1000, 925, 850, 700, 600, 500, 400, 300, 250, 200, 150, 100, 50] hPa
• GraphCast Operational:
  • 10-m u wind component
  • 10-m v wind component
  • 2-m temperature
  • Mean sea level pressure
  • Geopotential at: [1000, 925, 850, 700, 600, 500, 400, 300, 250, 200, 150, 100, 50] hPa
  • Temperature at: [1000, 925, 850, 700, 600, 500, 400, 300, 250, 200, 150, 100, 50] hPa
  • U wind component at: [1000, 925, 850, 700, 600, 500, 400, 300, 250, 200, 150, 100, 50] hPa
  • V wind component at: [1000, 925, 850, 700, 600, 500, 400, 300, 250, 200, 150, 100, 50] hPa
  • Specific humidity at: [1000, 925, 850, 700, 600, 500, 400, 300, 250, 200, 150, 100, 50] hPa
  • Vertical velocity at: [1000, 925, 850, 700, 600, 500, 400, 300, 250, 200, 150, 100, 50] hPa
  • 6-hr accumulated precipitation