Abstract: The shape factor of hailstones, defined as the ratio of their long and short axes (m?/m), has been measured for hailstones from three geographical areas: northeastern Colorado, central Oklahoma and central Alberta. The ...

Abstract: Data on hailstone embryo types, using a broad classification as graupel or frozen drops, are presented from several geographical areas representing distinctly different storm ?climatologies.? The relative frequency of the ...

Abstract: This is the first of a two part series describing storms termed "hybrid? because their characteristics are intermediate between those classically defined as multicellular and supercellular. They are important because they ...

Abstract: The Aurora, Nebraska, hailstorm of 22 June 2003 produced some exceptionally large hailstones, and was widely publicized. Nineteen hailstones obtained from local people have been sectioned and photographed and eight are ...

Abstract: This paper illustrates the Planning and conduct of a Research Experience for Undegraduates (REU) project associated with the 1989 North Dakota Thunderstorm Project held in June/July of that year near Bismarck, North Dakota. ...

Abstract: The freezing of a spongy ice deposit produces a variety of distinctive internal structures caused by the expansion of the trapped water upon freezing. Cracks, certain arrangements of sub-boundaries, and some particular air ...

Abstract: The procedures required in measuring and representing hailstone orientation fabrics, and the reason for the development of one particular fabric, are discussed. Spongy growth has been found to give rise to a fabric with ...

Abstract: The mass, density, fall velocity and internal structure have been determined for low-density hailstones from an truly spring storm in Boulder, Colorado, and drag coefficients were calculated. The density of the permeable ...

Abstract: Spongy hailstones have been collected by the quenching method, and their structures examined. The most common type of spongy hail in Colorado is small hail that formed as loose rime (graupel) and became soaked with liquid ...

Abstract: Study of frozen drops preserved as hailstone embryos shows that breaking during freezing is fairly common. Drops in clouds tumble and grow by accretion as they freeze. Both effects are expected to favor shattering, but ...