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Clouds Clouds - convection xxx
Clouds - convection best
Convection base roughly at the same level as the base of low cloud, with convection depth up to 2 km = a nice thermal day.
low cloud layer
convection: height and thickness
The convection base is at the same level as the cloud base.
The convection base is close to the cloud base height and often corresponds to the base of low cumulus cloud.
Depth: The convection layer is typically 1–3 km deep, which usually means fair-weather cumulus without significant storm development.
What it means for flying: A typical thermal day with cumulus clouds, good readability of thermals, and often some of the best conditions for cross-country flying.
(The values are approximate and depend on the season, humidity, temperature, and other factors.)
