Jet streams, thunderstorms, and Project Skyfire

  • Vincent J. Schaefer


More than 70% of forest fires in the northwestern United States are caused by lightening. The Project Skyfire is an attempt to learn more about the atmospheric conditions leading to thunderstorms in this area and to investigate the possibilities of an artificial influence on their development by cloud seeding. The experiences gained with the training of amateur observers as well as the first scientific results of the project are briefly discussed. During the first year of observations, for instance, there was found to exist an intimate relationship between a certain type of fast moving thunderstorms and the intensity and position of the jet stream. Finally, the great economical value of researches in the field of applied meteorology is stressed.


Climate Change Waste Water United States Water Management Water Pollution 
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Über 70% der Waldbrände im Nordwesten der Vereinigten Staaten werden durch Blitze entzündet. Das “Project Skyfire” hat es sich zum Ziel gesetzt, die atmosphärischen Bedingungen, welche zur Bildung von Gewittern in diesem Gebiet führen, zu untersuchen und die Möglichkeiten einer künstlichen Beeinflussung durch “seeding” zu erforschen. Die gesammelten Erfahrungen mit der Schulung von Amateur-Beobachtern, sowie die bisherigen wissenschaftlichen Ergebnisse werden kurz diskutiert. Schon im ersten Jahr der Beobachtungen ergaben sich interessante Zusammenhänge zwischen einer bestimmten Art von rasch ziehenden Gewittern und dem Jet-Stream. Schließlich wird auf den weitreichenden wirtschaftlichen Nutzen großzügiger Forschungen auf dem Gebiet der angewandten Meteorologie hingewiesen.


Plus de 70% des incendies de forêts dans le Nord-Ouest des Etats-Unis sont dûs à la foudre. Le «Project Skyfire» a pour but d'étudier les conditions atmosphériques conduisant dans ces régions à la formation d'orages ainsi que les possibilités d'agir sur cette formation au moyen d'inséminations artificielles. On discute brièvement les expériences faites en instruisant des observateurs amateurs ainsi que les résultats scientifiques. Dès la première année de recherches, on a constaté d'intéressantes relations entre un certain type d'orages rapides et le jet stream. Enfin on attire l'attention sur le grand intérêt économique d'études étendues dans le domaine de la métérologie appliquée.


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© Springer-Verlag 1955

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  • Vincent J. Schaefer

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