Meteonorm Forecast
Meteonorm's Forecasting Services provide high-precision forecasts of solar radiation, energy yield, and various meteorological parameters to support solar energy applications and environmental assessments.
Two forecast products are available:
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Forecast Basic: A standard 8-day forecast based on Global Forecast System (GFS), offering reliable solar irradiance predictions and auxiliary weather data.
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Forecast Precision: An enhanced 8-day forecast that combines advanced weather models with post-processing algorithms and nowcasting techniques based on satellite data to deliver superior short-term and intraday accuracy.
| Feature | Forecast Basic | Forecast Precision |
|---|---|---|
| Forecast Horizon | Up to 8 days | Up to 8 days |
| Update Frequency | 4 times per day | Hourly updates (MOS) + 15-minute updates (CMV) |
| Data Sources | GFS | GFS + IFS + CMV + MOS |
| Spatial Coverage | Global, 0.25° | Global (CMV 60°S - 60°N), interpolated |
| Temporal Resolution | 1-hour steps | 15-minute steps |
| Short-Term Accuracy | Standard NWP accuracy | High accuracy using nowcasting and statistical optimization |
| Auxiliary Parameters | Yes | Yes |
| Best Suited For | Long-range planning and standard applications | Intraday planning and applications requiring high short-term precision |
Coverage
The Meteonorm Forecast products are available globally. However, for Forecast Precision, the highest quality is achieved within the latitudinal range of 60°S to 60°N, where satellite-based nowcasting enhancements are applied to improve short-term accuracy. Outside this range, the forecasts are based solely on numerical weather model output, as satellite-based nowcasting is not available or less effective at higher latitudes. This limitation only impacts the very short-term forecast horizon, typically the first few hours, while the overall 8-day forecast remains fully operational and reliable across all regions.
Parameters
| Parameter | Description | Units |
|---|---|---|
| GHI | Global horizontal irradiance | W/m2 |
| GTI | Global tilted irradiance | W/m2 |
| DHI | Diffuse horizontal irradiance | W/m2 |
| DTI | Diffuse tilted irradiance | W/m2 |
| DNI | Direct normal irradiance | W/m2 |
| DIR | Direct horizontal irradiance | W/m2 |
| BTI | Direct tilted irradiance | W/m2 |
| PV | PV production | W/kWP |
| RR | Precipitation | mm |
| RH | Relative humidity | % |
| FF | Wind speed | m/s |
| DD | Wind direction | ° |
| FX | Wind gusts | m/s |
| Ta | Air temperature | °C |
| Td | Dew point temperature | °C |
| N | Cloud cover | octas |
| p | Atmospheric pressure | hPa |
| sy | Weather symbol | - |
| snow | Snow depth | m |