ASCE 39-15 PDF Download

The ASCE 39-15 standard provides a comprehensive guide to designing, implementing, and evaluating operations aimed at reducing the formation of hail. Hail is formed through intense convection in the atmosphere, and this standard focuses on the use of seeding techniques to suppress its formation.

The standard highlights five commonly employed concepts in successful hail suppression projects, including beneficial competition, early rainout, trajectory lowering, promotion of coalescence, and dynamic effects. It covers various aspects of hail suppression program design, such as defining project scope, selecting seeding agents, delivery methods, meteorological data collection and forecasting, equipment selection and siting, legal considerations, and environmental concerns.

Furthermore, the standard addresses essential factors in conducting a hail suppression program, such as developing an operations manual, personnel requirements, operational decision-making, communications, safety, and public relations. It also provides guidance on evaluating the project area and assessing effectiveness using direct and secondary evidence.