Solar power

What it shows

Shortwave solar radiation reaching the ground now, which is what a photovoltaic panel converts. The night side reads zero and clouds cut into the day side. The readout also gives direct normal irradiance.

Where the data comes from

NOAA GFS downward shortwave radiation (public domain), 3-hour means turned into instantaneous values by sun angle; direct normal irradiance by the Erbs split; 2° grid, 24 h ago to 48 h ahead.

Reading the map

Dark navy at 0 W/m² (night), violet and tan through the low values, gold around 650 and pale yellow at 1,050 W/m² and above.

Units Watts per square metre (W/m²).

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Other layers in weather

• Wind
• Temperature
• Rain radar
• Pressure
• Humidity
• Air quality
• Ultraviolet
• Sea state
• River flow