On February 13, 2019, a Delta Airlines flight had to be diverted to Reno, Nevada, after severe turbulence caused injuries to five passengers. Three of the passengers were injured so badly that they required hospitalization. The plane, en route from Santa Ana, California to Seattle, flew through a strong winter storm, expected to last all week. The National Weather Service in Reno said the storm will "downright dangerous flying conditions with extreme turbulence". The Service went on the say "this is a particularly dangerous situation for aviation in the lee of the Sierra over the next few days." Considering the warnings made by the National Weather Service, one wonders why the airplane's pilots chose to fly directly through the storm, rather than altering their course.