The RED arrow shows the highest wind gust today. This graph shows the windspeed outside over the last 24 minutes. Scientists use this barometer chart to help predict the weather. The faster the line rises or falls, the faster the weather is changing. All these charts and readings help scientsist track weather and learn more about how the weather works.
Many people track weather as a hobby.
The more we learn about weather, the better we can help crops grow, warn people of dangerous weather, or even just plan a picnic.