Approaching Lake Huron from the east we see that the edge of the - TopicsExpress



          

Approaching Lake Huron from the east we see that the edge of the lake is distinctly marked by a line of low cumulus clouds. Convection causes clouds like that with the source of heat being the sun warmed earth below and upwind of the clouds. Today, the lake was too cool to drive convection in the air above but the land in the mid afternoon had warmed enough to drive cloud formation up to one or two kilometres up. Another phenomenon that can enhance convection on a shore like this is convergence. The wind flows more smoothly over the lake and speeds up. When the air encounters the shore it is forced to slow down but more air keeps arriving from upwind. This can force air to rise and form a line of convective cumulus clouds inshore from a large lake or the ocean.
Posted on: Tue, 26 Aug 2014 01:11:31 +0000

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