An unprecedented decline in global air traffic is limiting the data that meteorologists use to predict the weather. "We have seen a precipitous decline in [air] traffic from mid-March until now and it continues to decline," said Petchenik. "One of the most fundamental parts of weather forecasting is getting the initial state of the atmosphere right," said Tyler Hamilton, a meteorologist with The Weather Network. "That wind observation is particularly vital to weather forecasting," he said. Aircraft like this KLM jet transmit data used for weather forecasting.

Source: CBC News April 06, 2020 13:52 UTC