Abstract: Small but well-organized steam devils were observed forming and propagating over a swimming pool fed by hot springs. The steam devils are described and compared to similar vortices observed in various environs.

Abstract: Snow crystals sampled from winter storms of the Sierra Nevada have been examined to determine their riming characteristics in terms of their dimensions and habits of growth. The field data show that accretion can begin on ...

Abstract: Measurements were made of the sizes and concentrations of graupel and snow crystals occurring in seeded and untreated winter storms of the Sierra Nevada. The amounts of rime on individual snow crystals were also determined. ...

Abstract: It is generally believed that synoptically driven storms, with Offing induced or enhanced by upslope flow over the high plains, produce most of the winter precipitation in eastern Colorado. Two extremely different circulations, ...

Abstract: Questions of delivery, transport, and dispersion of cloud seeding aerosol in a convective feeder cloud are addressed by using radar chaff as a surrogate for aerosol and tracking it with circular-polarization radar. In a ...

Abstract: The variations of ice nucleus and ozone concentrations were monitored at a high mountain observatory in the Colorado Rockies. Because the observatory is at an altitude of nearly 4 km MSL, increases in ozone at this station ...

Abstract: This study illustrates opportunities for much improved orographic quantitative precipitation forecasting, determination of orographic cloud seedability, and flash flood prediction through state-of-the-art remote sensing ...

Abstract: Single pristine planar ice crystals exhibit some flutter around their preferential horizontal orientation as they fall. This study presents estimates of flutter and analyzes predominant fall attitudes of pristine dendritic ...

Abstract: Model calculations and measurements of the specific propagation and backscatter differential phase shifts (KDP and δo, respectively) in rain are discussed for X- (? ? 3 cm) and Ka-band (? ? 0.8 cm) radar wavelengths. The ...

Abstract: An approach is suggested to relate measurements of radar depolarization ratios and aspect ratios of predominant hydrometeors in nonprecipitating and weakly precipitating layers of winter clouds. The trends of elevation ...