BLOG: Why is it often windier during the day? - | WBTV Charlotte

BLOG: Why is it often windier during the day?

(WBTV) (WBTV)
CHARLOTTE, NC (WBTV) -

I recently received a question about why the winds seem to always die down after the sun sets. And it is true. 

In the absence of an unusual, or overnight weather system, typically the winds are stronger during the day than at night. 

So why is that?

As the sun rises in the morning and begins heating the ground, that process heats the surface air which begins rising up into the atmosphere as bubbles or parcels of air, just like your boiling water on the stove. While those bubbles are rising, other parcels of air are sinking in between and replacing the rising air.

Typically, the winds aloft say around 3, 4 or 5,000 feet are stronger and the sinking air from those levels transports those winds down to the surface.

Once the sun sets, that process ends and the surface winds tend to weaken and calm down.

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