Over cast sky. Conditions in upper atmosphere exert an influence on weather conditions.
A man fixes a balloon onto a machine. Balloon inflates as hydrogen fills into it. Balloon release to forecast weather conditions and study cloud formation. Man looks through telescope of theodolite and records observations. Airplane and big Army balloon used to study cloud formation.
Clouds in he sky. Explains the process of cloud formation in the atmosphere by evaporation and condensation. Importance of cloud formation on weather as a whole.
Concepts of high and low pressure and moving air masses and their effects on weather conditions. Direction of wind flow in high and low pressure areas. A map shows high and low pressure areas in America during different times in year.
A man at weather bureau explains process of forecasting weather and transmitting it to other stations and to the public. Weather information transmitted to ships and air mail pilots.
Highlights the importance of weather forecast to inform people against the danger of natural hazards like storms and floods. A man rows a boat through a flooded area.
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