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Visibility and low clouds probability

This chart is based on near surface relative humidity, and make a direct correlation in probability of low visibility and or low clouds (cloud base below 100 m/300 ft above the ground) occurrence. Visibility can be affected by fog, mist and precipitation.

Fog and or low clouds are presented in three-hour step.

Fog and low cloud risk. This cart is valid for Saturday 18 march  2017 at 06h00 UTC.