Why are weather balloon soundings done at the same time around the world?

Weather balloon soundings are conducted at the same time around the world to ensure consistency and accuracy in the collection of weather data. The global coordination of weather balloon launches is a crucial component of weather forecasting and climate monitoring.

Here's how it works:

1. Standardized Observations: Meteorological organizations, such as the World Meteorological Organization (WMO), have established international guidelines and protocols for weather balloon soundings. These guidelines specify the precise time and frequency of launches, ensuring that data is collected uniformly across different regions and time zones.

2. Synchronized Reporting: By launching weather balloons simultaneously, meteorological agencies can gather data from various locations at the same point in time. This synchronization allows for comparisons and analysis of atmospheric conditions across different locations, providing a comprehensive understanding of the global weather patterns.

3. Data Assimilation: Weather models used for forecasting incorporate massive amounts of observational data, including information obtained from weather balloons. By conducting soundings simultaneously worldwide, meteorologists enhance the accuracy of these models, leading to more reliable weather predictions.

4. Global Monitoring and Understanding: By coordinating balloon soundings globally, scientists can monitor changes in atmospheric conditions over broader scales. This is particularly important for tracking large-scale weather phenomena like tropical cyclones, fronts, or atmospheric waves, which can often span multiple countries or even continents.

In summary, conducting weather balloon soundings simultaneously around the world ensures consistent data collection, supports accurate weather predictions, and enables a comprehensive understanding of global weather patterns.