Initialization Cycles & Forecast Horizon

Select an initialization date and hour to calculate the forecast coverage window and variable availability

Select Initialization Hour (UTC): 00:00 UTC (6-Hourly)
Forecast Horizon: 15 Days (360 Hours)
Coverage Window:
Aug 26, 2026, 00:00 UTC → Sep 10, 2026, 00:00 UTC
› 4-Week Calendar Coverage View (Click to expand)
Aug 2026 – Sep 2026
Available Variable Layers
0.1° Gridded Surface Vars All 24 Inits/Day
2m temp & dew point, 10m/100m wind (speed, u, v), MSLP, SST, 4 cloud layers, 1h solar (downward & direct)
0.1° Precipitation Vars All 24 Inits/Day
0.1° Analysis Precip (m), IMERG satellite 1h precip (m), Experimental satellite-radar 1h precip (m)
0.05° Station Head Vars All 24 Inits/Day
Station-calibrated 2m temperature & dew point (trained on physical ground weather stations)
0.25° Atmospheric Levels 6-Hourly Inits Only
Geopotential, Temp, Humidity, U/V Wind, Vertical Velocity across 13 pressure levels (50–1000 hPa)
› </> Python Code Extract (Xarray / Zarr) (Click to expand)
temperature_2m 
import xarray as xr

# Note: gs://weathernext3_spatial requires a GCP billing project (Requester Pays)
# Open WeatherNext 3 forecast run
ds = xr.open_zarr(
    "gs://weathernext3_spatial/weathernext_3_0_0/zarr/2026_to_present/20260827_06hr_01_preds/predictions.zarr",
    storage_options={"project": "YOUR_PROJECT_ID"}
)
data = ds["temperature_2m"]
All outputs generated at 1-hour time steps without temporal interpolation.
Zarr Target: predictions.zarr