Some Observations on Foreign Material in Hailstones

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  • 1 National Center for Atmospheric Research , Boulder, Colo. 80307
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Several observations illustrate the ease with which particles can contaminate hailstones collected from the ground. There are two modes of penetration: in large hailstones, particles enter through the lobe boundaries, and in smaller ones, they enter directly into porous portions of the stones. Washing or melting the exterior layer of a hailstone will not assure that the remainder is uncontaminated.

1 NCAR is sponsored by the National Science Foundation.

Several observations illustrate the ease with which particles can contaminate hailstones collected from the ground. There are two modes of penetration: in large hailstones, particles enter through the lobe boundaries, and in smaller ones, they enter directly into porous portions of the stones. Washing or melting the exterior layer of a hailstone will not assure that the remainder is uncontaminated.

1 NCAR is sponsored by the National Science Foundation.

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