An Attempt to Modify Hurricanes
Project Stormfury was an attempt to weaken tropical cyclones by flying aircraft into them and seeding with silver iodide.
The project was run by the United States Government from 1962 to 1983.The hypothesis was that the silver iodide would cause supercooled water in the storm to freeze, disrupting the inner structure of the hurricane. This led to the seeding of several Atlantic hurricanes. However, it was later shown that this hypothesis was incorrect. In reality, it was determined most hurricanes do not contain enough supercooled water for cloud seeding to be effective. |
The personnel of Project Stormfury of the U.S. National Oceanic and Atmospheric Administration in front of one of their Douglas DC-6 in 1966. Image by NOAA on Wikimedia Commons
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Additionally, researchers found that unseeded hurricanes often undergo the same structural changes that were expected from seeded hurricanes. This finding called Stormfury’s successes into question, as the changes reported now had a natural explanation.
The last experimental flight was flown in 1971, due to a lack of candidate storms and a changeover in NOAA’s fleet. More than a decade after the last modification experiment, Project Stormfury was officially canceled. Although a failure in its goal of reducing the destructiveness of hurricanes, Project Stormfury was not without merit. The observational data and storm lifecycle research generated by Stormfury helped improve meteorologists’ ability to forecast the movement and intensity of future hurricanes.
The last experimental flight was flown in 1971, due to a lack of candidate storms and a changeover in NOAA’s fleet. More than a decade after the last modification experiment, Project Stormfury was officially canceled. Although a failure in its goal of reducing the destructiveness of hurricanes, Project Stormfury was not without merit. The observational data and storm lifecycle research generated by Stormfury helped improve meteorologists’ ability to forecast the movement and intensity of future hurricanes.
References
Project Stormfury – Operation Order No. 1-70 [165 Pages, 5.25MB] http://documents.theblackvault.com/documents/weather/AD0722670.pdf
Project Stormfury – Operation Order No. 1-70 [150 Pages, 1.59MB] http://documents.theblackvault.com/documents/weather/AD0722671.pdf
Project Stormfury ANNUAL REPORT, 1969 – Published May 1970 [116 Pages, 6.41MB] http://documents.theblackvault.com/documents/weather/AD0717498.pdf
Project Stormfury ANNUAL REPORT, 1970 – Published May 1971 [169 Pages, 8.96MB] http://documents.theblackvault.com/documents/weather/AD0730016.pdf
Project Stormfury – Operation Order No. 1-70 [150 Pages, 1.59MB] http://documents.theblackvault.com/documents/weather/AD0722671.pdf
Project Stormfury ANNUAL REPORT, 1969 – Published May 1970 [116 Pages, 6.41MB] http://documents.theblackvault.com/documents/weather/AD0717498.pdf
Project Stormfury ANNUAL REPORT, 1970 – Published May 1971 [169 Pages, 8.96MB] http://documents.theblackvault.com/documents/weather/AD0730016.pdf
