The National Hail Research Experiment Report on the Alberta Hail Project

The Alberta Hail Project conducts airborne silver iodide seeding to test hail suppression in an 1800 square mile target which experiences 55-65 hail days annually. Randomization by days occurs in the northern half of the target, with the exception of some south-moving storms. Full operational seeding is conducted in the southern half. Seeding on top (at about -14C) with droppable flares and at cloud base with fusees is executed by a maximum of seven aircraft, one of which is instrumented for cloud physics. The seed criterion is an echo intensity of 35 dBZ in or approaching the target. Present findings suggest (from radar and photography) a gradual transition between multicell and supercell storms. Tracer results suggest on top seeding may be more effective in silver iodide distribution in the storm.

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Author Simpson, Joanne
Publisher UCAR/NCAR - Library
Publication Date 1976-01-01T00:00:00
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Topic Category geoscientificInformation
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Metadata Date 2023-08-18T18:05:23.971549
Metadata Record Identifier edu.ucar.opensky::technotes:67
Metadata Language eng; USA
Suggested Citation Simpson, Joanne. (1976). The National Hail Research Experiment Report on the Alberta Hail Project. UCAR/NCAR - Library. Accessed 29 September 2023.

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