#WxGeekSpeak: Autumnal Equinox

Every week, the blog introduces you to a technical term from the American Meteorology Society’s “Glossary of Meteorology”. Welcome to #WxGeekSpeak!

What does Autumnal Equinox really mean? Why don’t we have exactly 12 hours of sunlight today? Click the video above for the full details on the first day of Fall.

Full definition of Autumnal Equinox: The equinox (approximately 22 September) at which the sun crosses the celestial equator from the Northern Hemisphere to the Southern Hemisphere.

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