Mistral (wind) of mistral is weaker in the east of Provence and the Côte d'Azur. The mistral is not always synonymous with clear skies. When a low pressure front over the Mediterranean approaches the coast from the southeast, the weather can change quickly for the worse, and the mistral and its clear sky changes rapidly to an east wind bringing humid air and threatening clouds. The position of the low-pressure front creates a flow of air from the northwest or the northeast, channeled through the Rhône Valley. If this low-pressure area moves back toward the southeast, the mistral will quickly clear the
Pioneer Zephyr equipped with matching stainless-steel fluting. Many of the Burlington's long distance named passenger trains began operating under the "Zephyr" banner, including the "Nebraska Zephyr", "Twin Cities Zephyr", and perhaps the most famous of the namesake, the "California Zephyr". On the second anniversary of the train's famous dash, the original "Zephyr" was rechristened the "Pioneer Zephyr" to distinguish it as the first of the Burlington's growing "Zephyr" fleet. In 1938, car 525 was replaced by car number 500, a 40-seat buffet/lounge car, to provide light meals. Car number 505, the baggage-coach combine, was rebuilt at this time into a full baggage