What will the weather be like tomorrow and the next few days? The answer to this question will become a little less precise than it was, because because of the Covid-19 epidemic, a large part of the data used in weather forecast software is no longer available. Typically, many commercial aircraft collect temperature, wind speed and atmospheric pressure at different altitudes. But these measures will soon be completely stopped. Because a large number of planes are nailed to the ground: in addition to the closure of the centenary airport of Orly, south of Paris, other airports in France and in Europe are stopped or accuse massive cancellations.
Impacts on meteorological models
Now for meteorologists, “This information is precious. They represent 7% of the data assimilated in French meteorological models, explains Alain Soulan, Deputy Director General of Météo-France. They account for 15% of the information, because these measurements of planes have a lot