# 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](https://docs.jua.ai/python-sdk/weather/forecast) or [REST API](https://docs.jua.ai/api-v2/getting-started)

## Technical Specifications

### Available Weather Parameters

| Parameter Code | API Name                                       | Description                       | Units        |
| -------------- | ---------------------------------------------- | --------------------------------- | ------------ |
| 2t             | air\_temperature\_at\_height\_level\_2m        | Air temperature at 2m             | Kelvin       |
| 10si           | wind\_speed\_at\_height\_level\_10m            | Wind speed at 10m                 | m s⁻¹        |
| 10wdir         | wind\_direction\_at\_height\_level\_10m        | Wind direction at 10m             | Degrees true |
| 100si          | wind\_speed\_at\_height\_level\_100m           | Wind speed at 100m                | m s⁻¹        |
| 100wdir        | wind\_direction\_at\_height\_level\_100m       | Wind direction at 100m            | Degrees true |
| msl            | air\_pressure\_at\_mean\_sea\_level            | Mean sea-level pressure           | Pa           |
| ssrd           | surface\_downwelling\_shortwave\_flux\_sum\_1h | Surface solar downward irradiance | J m⁻²        |
| z\_500         | geopotential\_at\_pressure\_level\_50000Pa     | Geopotential at 500hPa            | m² s⁻²       |

{% hint style="info" %}
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.
{% endhint %}

The legacy parameter naming convention used in EPT-1.5 is deprecated. All new integrations should use the standardized naming shown above. See [Weather Variable Naming](https://docs.jua.ai/python-sdk/weather/naming) for full details.

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](https://docs.jua.ai/python-sdk/getting-started) and [API](https://docs.jua.ai/api-v2/getting-started). For bulk, grid-based access, please contact <support@jua.ai>.

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

### Extended Hindcast Data (Special Request Only)

{% hint style="warning" %}
**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 <support@jua.ai> to request access.
{% endhint %}

| **Model**     | **Spatial Extent**           | **Extended Temporal Coverage**           | **Forecast Horizon and Resolution**                                               |
| ------------- | ---------------------------- | ---------------------------------------- | --------------------------------------------------------------------------------- |
| EPT-1.5       | Global                       | 2024-10-16 - today at 00, 06, 12, 18 UTC | <p>480h</p><p>- From 1h to 240h: hourly</p><p>- From 240h to 480h: six-hourly</p> |
| 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 | <p>480h</p><p>- From 1h to 240h: hourly</p><p>- From 240h to 480h: six-hourly</p> |
| EPT-1.5 Early | Global                       | 2025-01-01 - today at 00, 06, 12, 18 UTC | <p>480h</p><p>- From 1h to 240h: hourly</p><p>- From 240h to 480h: six-hourly</p> |
| 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](https://docs.jua.ai/models-and-products/dissemination-times) page.