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<p>[QUOTE=&quot;wxcoin, post: 4348950, member: 74624&quot;]The main impact of the big reduction is air travel related to forecasting is in the accuracy of the numerical weather models.&nbsp; Many different types of observations are used as input to numerical weather forecasting models.&nbsp; Weather balloons are launched twice per day around the world and the data gathered are freely shared by all nations.&nbsp; In addition, add in surface, satellite, and data from commercial airlines as they travel worldwide.&nbsp; They fill in the gaps between the 12 hour balloon launches over land and over the oceans.&nbsp; Fewer flights result in fewer observations; especially over the oceans.&nbsp; Unfortunately, there have been news stories about forecasts being less accurate because of the reduction of aircraft observations into the models; the satellite observations have not been impacted.&nbsp; Yes, there has been a negative impact on the accuracy of the weather forecast models; especially at longer time scales.&nbsp; However, the perception that the forecasts produced by these models are no good is wrong.&nbsp; In forecasts out to 5 days, I doubt the impact is significant.[/QUOTE]</p><p><br /></p>

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