Product1 publisherNot yet confirmed elsewhere3 min readPublished
Homer residents discovered Rainmaker's cloud-seeding experiment only after it ran
Rainmaker says its drones made 19 million gallons of water in three hours over Homer, Alaska, in a run residents learned about afterwards. The criticism that followed concerns two things an operator controls: notice and ground monitoring.
The Product Desk · Product desk
Drafted by a language model from the sources cited here and checked against its claim ledger before publication. How we use AISend a correction
What happened
- Rainmaker's drones carry silver iodide flares that, once lit, put particles into freezing cloud that grow into ice crystals and fall as rain.
- Chief executive Augustus Doricko says each flight releases 20 grams of silver iodide, spread across thousands of square kilometres.
- Outside Alaska, Rainmaker operates in Idaho, Utah, Colorado and Jordan.
- More than 50 countries are developing weather-modification programmes, and a wave of start-ups is building rain-making systems.
Compiled by The Product DeskSomething wrong?How this is made
Why it matters
- exposure Residents who discover a seeding run afterwards hear its safety case from critics first. When the vendor's dose figures come, they read as a rebuttal.
- contradiction Doricko cites a calculated ground concentration while Freeman wants downstream measurements. Neither side's evidence answers the other's question.
- constraint Gains of 5 to 10% in good conditions give residents little visible benefit to weigh against a flight they were not told about.
On 23 August, Cooper Freeman had no idea the clouds above him were being filled with a silver compound to make rain, according to the BBC [2]. Thousands of other people in Homer also found out later [3]. Freeman is the Alaska director of the Center for Biological Diversity [6].
He has two objections. "It doesn't appear that there was any downstream monitoring to verify that this silver iodide didn't impact the environment," he said [5]. The second is about whether seeding fits the town's problem: "Having a company come in to do this seeding isn't going to solve our water woes, and it feels like a distraction from solving the urgent issues related to water conservation," he said [8].
The pitch is the volume figure [15]. By the BBC's conversion, it comes to about 0.01 inch of rain across 100 square miles [4]. Augustus Doricko, Rainmaker's founder and chief executive, is open about needing weather that is already there: without clouds, "we can't do anything," he said [10]. Jon Meyer, an assistant state climatologist at the Utah Climate Center, described the limit: "With the right conditions, cloud seeding squeeze out about an extra five to 10% of precipitation" [1].
The people living under the cloud learned about the product after it had run, and the first public account of its safety came from a critic [3][5].
Doricko has fielded the chemistry question often enough that the BBC remarked on it [13]. He said the resulting increase in concentration on the ground is in the parts per quadrillion, well below the threshold the Food and Drug Administration sets for what is allowable [14]. His figure is calculated from how little silver each flight releases and how widely it spreads [12]. Freeman is asking for a measurement taken downstream in Homer [5]. The reporting does not say whether Rainmaker sampled there, who commissioned the run or what notice local rules required, so it does not show that any rule was broken.
I'd write two conditions into any seeding contract: public notice before the season starts, and ground sampling after flights. The trade-off is money and flexibility. Flights have to wait for clouds to form, so notice has to cover a window of possible dates, and sampling is an extra cost on a modest yield [10][1].
The test has two axes: whether the people under the cloud were told before the flight, and whether anyone has ground data from the site afterwards. With both, a buyer can defend the run on Friday. Notice without data leaves the buyer facing requests for measurements nobody took. Data without notice means the answer exists, but critics told the story first. Homer, as Freeman describes it, had neither [5][6].
What to watch
- Whether Rainmaker or Alaska authorities publish ground sampling results from Homer after the 23 August run.
- Whether Homer or Alaska officials set advance-notice requirements for future seeding flights.
- Whether buyers in Rainmaker's other markets, including Utah and Colorado, write public notice and sampling into seeding contracts.