Early Closure on Fourth of July - NSF NCAR Road, Parking Lot and Trails

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  1. Hurricane Felix satellite image

    Hurricane study to tackle long-standing mystery

    Researchers and aircraft will search for secrets of hurricane formation above the tropical Atlantic Ocean.

    • Weather

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  2. Tornado researchers catch a squall line during VORTEX2

    In the spring of 2009, researchers on the Second Verification of the Origins of Rotation in Tornadoes Experiment (VORTEX2) field project set out across the Great Plains to study tornadoes, but that’s not the only phenomenon they observed.

    • Weather

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  3. hole-punch cloud

    Mysterious clouds produced when aircraft inadvertently cause rain or snow

    Turboprop and jet aircraft can create hole-punch clouds, which have long fascinated the public.

    • Weather

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  4. Andy Heymsfield

    The hole story

    They’ve been called “crop circles in the sky.” Across the world, sightings of oddly circular holes within cloud layers—dubbed hole-punch clouds by scientists—have triggered bemusement and speculation.

    • Weather

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