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Hurricane debbie modification experiments, august 1969.

R C Gentry

    Science (New York, N.Y.)
    |April 24, 1970
    PubMed
    Summary

    Project Stormfury experiments successfully reduced maximum winds in Hurricane Debbie using silver iodide cloud seeding. This research demonstrated the potential for hurricane modification through controlled weather interventions.

    Area of Science:

    • Meteorology
    • Atmospheric Science
    • Weather Modification

    Background:

    • Hurricane Debbie in August 1969 was subjected to modification experiments.
    • Previous research explored the feasibility of altering hurricane intensity.

    Purpose of the Study:

    • To assess the impact of cloud seeding on hurricane wind speeds.
    • To determine if Project Stormfury's interventions could modify hurricane intensity.

    Main Methods:

    • Silver iodide particles were used to seed clouds around Hurricane Debbie's center.
    • Seeding occurred five times at approximately 2-hour intervals on August 18 and 20, 1969.

    Main Results:

    • On August 18, maximum winds at 3600 meters decreased from 182 km/h to 126 km/h five hours after the final seeding.

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  • On August 20, maximum winds decreased from 183 km/h to 156 km/h following the seeding procedure.

    • Conclusions:

    • The observed wind speed reductions suggest that Hurricane Debbie was successfully modified.
    • The results indicate that targeted cloud seeding can influence hurricane intensity.