Cloud Movements and Wind Patterns Above a Home Balcony: A Fourteen-Day Observation and a Wind-Scoop Idea Inspired by Nature

Wind cannot be seen, but clouds show where it is going. A seven-year-old child researcher in Hyderabad used this to study the sky above his family's balcony, which looks out on two tall buildings about thirty metres apart. Every afternoon at 4:30 pm for fourteen days in August 2026, near the end of the monsoon, he watched the sky for ten minutes. He pushed a stick into a planter as a fixed marker and counted every cloud that crossed it. He also noted which way and how fast the clouds were moving, what shape they were and how much of the sky they covered. A loose string tied to the stick showed whether the wind at balcony level was blowing the same way as the clouds. The number of clouds crossing the marker swung widely, from one to fifty-nine, but a typical afternoon brought only about three. The paper explains the unusual afternoon of fifty-nine as a broken sheet of thin, wispy cloud whose many small pieces were counted one by one. Clouds drifted mostly westward in the first week and eastward in the second, which the paper links to the different winds that blow at low and high levels during the Indian monsoon. Tall tower clouds were the commonest shape, and most of the sky was usually covered. The wind at the balcony never followed the clouds: it blew across their path on most days and could not be felt at all on the rest. That fits the idea that buildings bend and channel the wind near the ground, though the wind's compass direction was not recorded. The steady breeze between the buildings, described in the paper as a river of air that most flats never use, led to a design for cooling a room without electricity. Drawing on prairie-dog burrows, termite mounds and the traditional wind towers of Iran, he designed a passive window wind-scoop. It is a curved intake that catches the breeze and funnels it into a room, while a smaller, higher vent on the opposite wall lets warm air out. A cardboard model with two towers, a cereal-box scoop and a desk fan is planned, along with a fair test of how quickly smoke clears with and without the scoop, carried out under adult supervision.

Authors

Publication Details

Journal
Zenodo (CERN European Organization for Nuclear Research)
Published
2026-11-06
DOI
https://doi.org/10.5281/zenodo.24004123
Primary Topic
Wind and Air Flow Studies
Type
preprint
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preprint

Cloud Movements and Wind Patterns Above a Home Balcony: A Fourteen-Day Observation and a Wind-Scoop Idea Inspired by Nature

Tejas Prajapati, Darsh Prajapati, Khushbu Prajapati
1 links
Zenodo (CERN European Organization for Nuclear Research)
Wind and Air Flow Studies
preprint

Cloud Movements and Wind Patterns Above a Home Balcony: A Fourteen-Day Observation and a Wind-Scoop Idea Inspired by Nature

Tejas Prajapati, Darsh Prajapati, Khushbu Prajapati
preprint en

Abstract

Wind cannot be seen, but clouds show where it is going. A seven-year-old child researcher in Hyderabad used this to study the sky above his family's balcony, which looks out on two tall buildings about thirty metres apart. Every afternoon at 4:30 pm for fourteen days in August 2026, near the end of the monsoon, he watched the sky for ten minutes. He pushed a stick into a planter as a fixed marker and counted every cloud that crossed it. He also noted which way and how fast the clouds were moving, what shape they were and how much of the sky they covered. A loose string tied to the stick showed whether the wind at balcony level was blowing the same way as the clouds. The number of clouds crossing the marker swung widely, from one to fifty-nine, but a typical afternoon brought only about three. The paper explains the unusual afternoon of fifty-nine as a broken sheet of thin, wispy cloud whose many small pieces were counted one by one. Clouds drifted mostly westward in the first week and eastward in the second, which the paper links to the different winds that blow at low and high levels during the Indian monsoon. Tall tower clouds were the commonest shape, and most of the sky was usually covered. The wind at the balcony never followed the clouds: it blew across their path on most days and could not be felt at all on the rest. That fits the idea that buildings bend and channel the wind near the ground, though the wind's compass direction was not recorded. The steady breeze between the buildings, described in the paper as a river of air that most flats never use, led to a design for cooling a room without electricity. Drawing on prairie-dog burrows, termite mounds and the traditional wind towers of Iran, he designed a passive window wind-scoop. It is a curved intake that catches the breeze and funnels it into a room, while a smaller, higher vent on the opposite wall lets warm air out. A cardboard model with two towers, a cereal-box scoop and a desk fan is planned, along with a fair test of how quickly smoke clears with and without the scoop, carried out under adult supervision.

Zenodo (CERN European Organization for Nuclear Research)
Wind and Air Flow Studies
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