Summer Policy Colloquium

Do you want to put your science to work? Applications are now open for the 2020 AMS Summer Policy Colloquium in DC!

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The AMS is a global community committed to advancing weather, water, and climate science and service.

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What We Do


We advance understanding through high-impact, peer-reviewed scientific publications—including the Bulletin of the American Meteorological Society (BAMS).


We bring together atmospheric scientists, professionals, students, authors, educators, researchers, and weather enthusiasts from around the world to share and collaborate.


We offer certification programs, online learning, and other professional development opportunities so that our members can learn, grow, and succeed.


We help educators and policy-makers bring the very latest weather, water, and climate science to bear on our nation’s future… and the world’s.

Mary Glackin
AMS President

AMS provides access to the latest science as well as a community to help you advance.

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Glossary Term of the Week


Ice crystals that form in supercooled water that is too turbulent to permit coagulation into sheet ice. This is most common in swiftly flowing streams, but is also found in a turbulent sea (where it is called lolly ice). It may accumulate as anchor ice on submerged objects obstructing the water flow.

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