EPT-1.5 Family

EPT-1.5 and EPT-1.5 Early are our core product offerings. EPT-1.5 provides the highest accuracy and hindcast coverage, while EPT-1.5 Early offers dissemination 2.5 hours earlier to anticipate market movements.

Live Forecast Data

• Global coverage at 0.081°x0.081° (approx. 9x9km) resolution

• Four daily runs (00, 06, 12, 18 UTC)

• 20-day prediction horizon

• Real-time data access via Python SDK or REST API

Technical Specifications

Available Weather Parameters

Parameter Code	API Name	Description	Units
2t	air_temperature_2m	Air temperature at 2m	Kelvin
10si	wind_speed_10m	Wind speed at 10m	m s⁻¹
10wdir	wind_direction_10m	Wind direction at 10m	Degrees true
100si	wind_speed_100m	Wind speed at 100m	m s⁻¹
100wdir	wind_direction_100m	Wind direction at 100m	Degrees true
msl	air_pressure_at_mean_sea_level	Mean sea-level pressure	Pa
ssrd	ssrd	Surface solar downward irradiance	J m⁻²
z_500	geopotential_500hpa	Geopotential at 500hPa	m² s⁻²

Note that wind direction is expressed as the direction in which the wind is blowing from as measured clockwise from true North. For example, wind blowing from the South East would have a 10wdir value of 135.0.

For information on legacy parameter naming conventions in EPT-1.5, please refer to the Legacy Naming documentation.

For most forecast parameters (non-accumulated), the value at a given timestamp (e.g., 13:00) represents the weather conditions exactly at that time. The only exception is SSRD, which reflects the total solar radiation from 12:01 to 13:00 rather than just the conditions at 13:00 — making it an accumulated parameter.

Hindcast Data

Spatial Extent: Global, on a grid of 2220x4440 (9 km resolution).

Data Access: Hindcasts are accessible via our Python SDK and API. For bulk, grid-based access, please contact [email protected].

Model	Temporal Extent	Forecast Horizon and Resolution
EPT-1.5	2025-01-06 - today at 00, 06, 12, 18 UTC	480h - From 1h to 240h: hourly - From 240h to 480h: six-hourly
EPT-1.5 Early	2025-08-11 - today at 00, 06, 12, 18 UTC	480h - From 1h to 240h: hourly - From 240h to 480h: six-hourly

Extended Hindcast Data (Special Request Only)

Special Request Required: The following extended hindcast data is available but requires special access permissions and is not accessible through standard API/SDK access. Please contact [email protected] to request access.

Model	Spatial Extent	Extended Temporal Coverage	Forecast Horizon and Resolution
EPT-1.5	Global	2024-10-16 - today at 00, 06, 12, 18 UTC	480h - From 1h to 240h: hourly - From 240h to 480h: six-hourly
EPT-1.5	Europe (36°-72°N, -15°-35°E)	2022-01-01 - 2024-07-31 at 00 UTC	360h, hourly
EPT-1.5	North America (Various)	2022-01-01 - 2024-07-31 at 00 UTC	360h, hourly
EPT-1.5 Early	Global	2025-01-01 - today at 00, 06, 12, 18 UTC	480h - From 1h to 240h: hourly - From 240h to 480h: six-hourly
EPT-1.5 Early	Global	2025-01-01 - today at 00, 06, 12, 18 UTC	480h - From 1h to 240h: hourly - From 240h to 480h: six-hourly
EPT-1.5 Early	Europe (36°-72°N, -15°-35°E)	2024-01-01 - 2024-12-31 at 00 UTC	360h, hourly

Dissemination Times

For detailed dissemination times of EPT-1.5 and EPT-1.5 Early, please refer to the Dissemination Times page.