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Cloud Streets Above Bering Sea

March 30th, 2009 Category: Snapshots

Clouds below Bering Strait - March 24th, 2009

Clouds below Bering Strait - March 24th, 2009

Cloud streets are rows of cumulus or cumulus-type clouds aligned parallel to the low-level wind. Here, many are visible above the Bering Sea, between Russia and Alaska.

The most favorable conditions for their formation occur when the lowermost layer of air is unstable, but is capped by an inversion-by a stable layer of air.

This often occurs when upper air is subsiding, such as under anticyclonic conditions, and is also frequently found when radiation fog has formed overnight.

Convection occurs below the inversion, with air rising in thermals below the clouds and sinking in the air between the streets.

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