Horizontal convective rolls (Cloud streets)

Although horizontal convective rolls, also known as cloud streets, have been clearly seen in satellite photographs for the last 30 years, their development is poorly understood due to a lack of observational data.

Horizontal convective rolls, also known as horizontal roll vortices or cloud streets, are long rolls of counter-rotating air that are oriented approximately parallel to the ground in the planetary boundary layer.

These cloud streets cover vast areas and may be broken or continuous.

In windy conditions, the clouds can form lines (cloud streets) parallel with the wind.

Thermals can also be formed in a line usually because of the wind or the terrain, creating cloud streets.

Most of us prefer our winter roads free of ice, but cloud streets depends on it.

A pilot can use a cloud street to fly long straight-line distances by remaining in the row of rising air.

Cumulus radiatus clouds form in radial bands called cloud streets.

They form when wind shear causes horizontal circulation in the atmosphere, producing the long, tubular cloud streets.

Marching the clouded streets, trying still to articulate the miseries that had constricted their previous phase of existence.

The house in Cloud Street has been poisoned by a crime against black children, and its ghosts are in a tormented limbo.

In the case of a cloud street, thermals can line up with the wind, creating rows of thermals and sinking air.

Cloud streets off Nova Scotia, Canada (false color)

Attendance for Salina high schools is determined by residence relative to Cloud Street, within various elementary school residential districts.

Horizontal convective rolls (Cloud streets)

Days with steady, moderate winds can be good for this, as the thermals often will line up into cloud streets, enabling the pilot to race without having to turn.

The propellers moaned, and the Friendship passed through cloud streets, lines of puffy Rift clouds, and began to bounce and sway.

Cloud streets are usually more or less straight, but rarely cloud streets assume paisley patterns when the wind driving the clouds encounters an obstacle.

Glider pilots often use the updrafts produced by cloud streets enabling them to fly straight for long distances, hence the name "cloud streets".

He saw a house very like No. 1 Cloud Street: "A Victorian mess with lots of absolutely chaotic additions, cream and red and gray and green."

They can also be caused by the surface wind blowing over an escarpment or plateau, or even by upper winds deflected over a thermal updraft or cloud street.

Although horizontal convective rolls, also known as cloud streets, have been clearly seen in satellite photographs for the last 30 years, their development is poorly understood due to a lack of observational data.

When a steady wind is present, thermals and their respective cumulus clouds can align in rows oriented with wind direction, sometimes referred to as "cloud streets" by soaring and glider pilots.

Horizontal convective rolls, also known as horizontal roll vortices or cloud streets, are long rolls of counter-rotating air that are oriented approximately parallel to the ground in the planetary boundary layer.

It will be seen that, if the maintenance of such longitudinal vortices is possible, the presence of cloud streets (long lines of shallow cumulus clouds), which have also been clearly shown by satellite photographs, and seif dunes could be explained by one single hypothesis.

Amid increasingly ponderous language that touts the unbreakable bonds of family and the creation of a unified Australian clan and flavors its patriotic soup with a carefully measured dollop of politically correct shame, the house at 1 Cloud Street emerges in the shape of Australia.

Mr. Armfield sees the house at No. 1 Cloud Street, Perth, as a metaphor for the nation itself, occupied as it is by the wild, shiftless Pickles family, the industrious, God-fearing Lambs and the ghosts of an Aboriginal girl and the cruel missionary who drove her to suicide.