Controlling the Cost of Weather

We are a technology company reshaping the private sector weather industry, helping the world better understand and manage the enormous impact of weather. We deliver more accurate weather information, leveraging a growing proprietary dataset and industry-leading AI-driven modeling. The result is better decision-making and significant cost savings for our customers. As the climate changes and the impact of weather increases, the value of our service - and its importance to the planet - is growing larger.

This Reg CF offering is made available through StartEngine Capital, LLC. This investment is speculative, illiquid, and involves a high degree of risk, including the possible loss of your entire investment.
WeatherFlow-Tempest, Inc.

$1,155,693.34 Raised


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We have solid traction and are on a clear path toward greater success. With more than 60,000 paying customers and millions of users, we’ve generated more than $25 million in revenue since launching in 2019.

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We’re disrupting the existing, fragmented market for weather data and decision support, which already exceeds $10 billion. And climate change makes the addressable market much larger - and growing.

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Our strategy combines our patented, AI-driven Nearcast Technology™ and data from a growing network of 45,000+ Tempest stations, which along with recent partnerships, give a large advantage over would-be competitors.

*Market information provided by Grandview Research (source

the pitch

Our mission is to help the world better understand and control the enormous impact of weather. Our exclusive data and AI-driven modeling deliver more accurate weather information, resulting in better decision-making and significant cost savings for our customers. As the climate changes and the impact of weather increases, we believe the value of our service - and its importance to the planet - will only grow larger.

Since Our Last Raise 

Weather Technology Built on Better Data

As the global economy contends with the effects of climate change, Tempest meets the increasing demands for better weather data. Our patented Nearcast™ Technology provides all our customers with point-specific weather information exactly where and when they need it, providing cost-saving, essential information to individuals, businesses, and governments. 


Backed by a team of Ph.D. atmospheric and data scientists, seasoned business executives, and highly skilled engineers, we achieved YOY customer growth of 25% and exceeded $9 million in annual revenue after we completed our previous raise of $2.5 million. Now, we are ready to accelerate growth. 


The Problem & Our Solution

A Comprehensive Answer to Weather's Costly Impact

Each year, severe weather kills over 60,000 people, with the cost to the global economy reaching over $1 trillion. Severe events are only a small fraction of the impact on the $94+ trillion global economy. 


(Source) *Projected global cost increase due to climate change around energy, water supply, and hurricane damage.

Nearcast™ Technology, our point-specific weather information solution, uses best-of-breed zero-maintenance hardware, comprehensive observational data, AI-based weather modeling, and innovative mobile applications to deliver improved decision support so our customers can know what is happening now, what happened yesterday, and what will happen tomorrow. Our revenue comes from three synergistic sources:

  1. Revenue from our Tempest Hardware system through direct sales to consumers (B2C) and businesses (B2B) as well as our partner programs (B2B2C)
  2. Recurring annual subscription revenue from our family of Lifestyle Apps which are powered by our Tempest Network and Nearcast Technology™
  3. Recurring revenue from TempestOne - our business platform that supplies powerful weather data and decision support through our SaaS tools and via API

Using our technology, businesses and consumers can make informed decisions that save costs, aid preparation, and optimize performance across various uses.  

The Market & Our Traction

Meeting the Growing Demand for Weather Data and Decision Support

Weather impacts sectors across the global economy, including agriculture, energy, insurance, transportation, and tourism. As a result, there is already over $10 billion in annual revenue generated by private firms helping to manage this impact (source). 

(source, source, source, source, source, source)

We are disrupting and expanding the weather decision support market with our patent-protected, proprietary technology. We are also expanding our market to include gardeners, smart home mavens, parents concerned about family and education, and anyone looking to save energy in the home, as Tempest also enables local operators and utility grid managers to predict demand more accurately so they can allocate energy efficiently. 

Partner Case Studies

Tempest is guaranteed to save water and keep landscapes healthy.  An integrated Rachio & Tempest System puts those benefits on steroids!  More than $1 million in Tempest Systems were sold and paired with Rachio controllers in just six months. 

Tempest now gives WeatherBug more local data and makes their app more compelling.  And 15 million WeatherBug users are being encouraged to buy Tempest Systems.  Now that’s a partnership!

Our Disney partnership covers everything from weather safety at their parks & hotels to weather and climate education across the globe in a complementary relationship that helps save lives and benefits both businesses.

Other Partners and Clients

*This testimonial may not be representative of the experience of other customers and is not a guarantee of future performance or success.

*These testimonials may not be representative of the experience of other customers and is not a guarantee of future performance or success.

Since our last raise of $2.5 million, we have achieved the following milestones: 

  • New strategic partnerships with WeatherBug, Rachio, Disney, and more
  • Grew the network of Tempest sensors from 25,000 to over 45,000 -  the fastest-growing weather station network in history 
  • Managed thru global supply chain issues and saw YOY growth of more than 25% in the last six months alone
  • Expanded and refined our efforts with business customers with well-targeted TempestOne products 
  • Formed an exclusive strategic partnership to create The Tempest Lightning Network
  • Exceeded 3 million unique users utilizing our consumer weather services
  • Grew the number of Lifestyle app subscribers by more than 20% since April

In the Media

Why Invest

Growing Value by Delivering a Meaningful Impact to the World

We help the world prepare for and control the effects of severe weather by serving businesses and consumers - and the planet - in a synergistic manner. With growing revenue traction backed by a passionate team, we have created unique and defensible proprietary advantages with valuable weather data. 

We intend to create tremendous value for our customers, our employees, and all of our investors - and we will make sure to do our part for the planet Join us, and invest in Tempest!

Code View


108 Whispering Pines Dr #245
Scotts Valley , CA 95066

We are a technology company reshaping the private sector weather industry, helping the world better understand and manage the enormous impact of weather. We deliver more accurate weather information, leveraging a growing proprietary dataset and industry-leading AI-driven modeling. The result is better decision-making and significant cost savings for our customers. As the climate changes and the impact of weather increases, the value of our service - and its importance to the planet - is growing larger.


Daniel "Buck" Lyons
Daniel "Buck" Lyons
CEO, Director and Chairman of the Board

After early career years in finance, Buck has many years experience building and selling start-ups in a variety of industries. He has been involved in the weather and environmental space since 2000, when he co-founded WFn Holdings. He also co-founded environmental data aggregator Synoptic Data PBC in 2012. Buck holds a BA in Mathematics from Middlebury College and MBA from Stanford University. Against his will, he is occasionally featured in our marketing videos, since hiring someone who can act is too expensive. 

Dr. Martin Bell

Dr. Martin Bell

Chief Science Officer

A New Zealand native, career Atmospheric Scientist and avid outdoorsman, Marty leads an energetic team of Ph.D. atmospheric scientists and engineers (the “Drs Office”) developing WeatherFlow-Tempest’s Nearcast Technology™. He has spent most of his career in the US, leading numerical weather research and executing weather modeling operationally, including a stint running his own firm. He counts NASA, the US DoD, and many other research and commercial programs across the globe as former employers and clients. Marty earned his bachelor and doctorate degrees in Chemical Engineering from the University of Canterbury, and constantly touts the superiority of New Zealand in “very important” sports like sailing and rugby.

David St. John

David St. John

Chief Technology Officer

Starting his career at General Dynamics, David has since been involved with several successful start-ups. His entrepreneurial streak began with a venture formed during graduate school. David has strong expertise in both hardware and software, with a BS in Engineering from the University of Florida and an MS in Engineering from the University of California. An avid wind & water sportsman, his passion around creating better weather data was born of a selfish desire to get more time on the water (saving the world is just icing on the cake). David is affectionately known here as Pooh Bear for his relentless optimism and likeability while driving his team hard.

Phillip Atkinson

Phillip Atkinson

Founder, Director and Design Guru

Phil co-founded WeatherFlow-Tempest and is currently a valuable member of our Board of Directors. He designed the patented Tempest sonic anemometer and has actively contributed to the design of coming products. Phil has a full-time role serving as President/COO of WFn Holdings, an affiliate company that provides us key industrial grade weather data. He has 30 years of experience designing and maintaining weather station networks, after starting his career designing missile systems at Lockheed. He completed coursework at MIT and holds a BS from Harvard.

Michael Samols

Michael Samols

Consultant and Director

A trusted strategic advisor and member of the Board of Directors, Michael has more than 20 years of experience leading and consulting successful start-ups. From early years as an investment banker to successful start-up executive to venture capitalist, and now a private investor, Michael is an invaluable asset with a wealth of knowledge and expertise. (Which he provides when ocean conditions don't quite support his passion for riding waves.) Michael holds a BS from Harvard and an MBA from Stanford University.

Corrine Butcher

Corrine Butcher

Director of Software Development

After starting her career at United Parcel Service and the US Social Security Administration, Corrine quickly became a star programmer at WFn Holdings. She was an obvious choice for her current role as we founded WeatherFlow-Tempest. With a Masters degree in Computer Science and a flair for design, Corrine oversees the development & maintenance of our apps, SaaS tools and API with grace and genius (not to mention gratitude for no longer working for the SSA!).

Michele Redmon

Michele Redmon

Director of Marketing

Michele simply makes all our marketing communications go. As she has done for several previous entities, she expertly injects highly technical products and technology with life and personality to make them relatable for a variety of audiences. Her average week at WeatherFlow-Tempest includes a variety of PR planning, content strategy and creation, copyediting, ad execution and analysis, project management, and herding C-suite executives. She ruined the curve while getting her BA from the University of North Carolina, and she has continued demanding a lot from herself and others ever since.


WeatherFlow-Tempest, Inc.
Apr 7, 2023
Common Stock

Maximum Number of Shares Offered subject to adjustment for bonus shares

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WeatherFlow- Tempest, Inc.

Corporate Address


108 Whispering Pines Dr #245, Scotts Valley , CA 95066

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Common Stock

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Voting Rights of Securities Sold in this Offering

Each Subscriber shall appoint the Chief Executive Officer of the Company (the “CEO”), or his or her successor, as the Subscriber’s true and lawful proxy and attorney, with the power to act alone and with full power of substitution, to, consistent with this instrument and on behalf of the Subscriber, (i) vote all Securities, (ii) give and receive notices and communications, (iii) execute any instrument or document that the CEO determines is necessary or appropriate in the exercise of its authority under this instrument, and (iv) take all actions necessary or appropriate in the judgment of the CEO for the accomplishment of the foregoing. The proxy and power granted by the Subscriber pursuant to this Section are coupled with an interest. Such proxy and power will be irrevocable. The proxy and power, so long as the Subscriber is an individual, will survive the death, incompetency and disability of the Subscriber and, so long as the Subscriber is an entity, will survive the merger or reorganization of the Subscriber or any other entity holding the Securities. However, the Proxy will terminate upon the closing of a firm-commitment underwritten public offering pursuant to an effective registration statement under the Securities Act of 1933 covering the offer and sale of Common Stock or the effectiveness of a registration statement under the Securities Exchange Act of 1934 covering the Common Stock.

*Maximum number of shares offered subject to adjustment for bonus shares. See Bonus info below.

Investment Incentives*

Time-Based Bonus

Super Early Bird Bonus

Invest within the first 72 hours and receive an additional 15% bonus shares.

Early Bird Bonus

Invest within the first ten days and receive an additional 10% bonus shares.

Amount-Based Bonus

$385+ | Tier 1

Invest $385+ and receive a 10% discount on our products for one year + Tempest Hoodie.

$1,000+ | Tier 2

Invest $1,000+ and receive a 15% discount on our products for one year + Tempest Hoodie.

$2,500+ | Tier 3

Invest $2,500+ and receive a 15% discount on our products for two years + Tempest Hoodie + 5% bonus shares.

$5,000+ | Tier 4

Invest $5,000+ and receive a 15% discount on our products for five years + Tempest Hoodie + 10% bonus shares. 

$10,000+ | Tier 5

Invest $10,000+ and receive a 20% discount on our products for five years + Tempest Hoodie + 15% bonus shares.

$20,000+ | Tier 6

Invest $20,000+ and receive a 20% discount on our products for five years + Tempest Hoodie + 25% bonus shares.

Note: Investors will only receive a single time-based or amount-based bonus, which will be the highest applicable bonus.

* In order to receive perks from an investment, one must submit a single investment in the same offering that meets the minimum perk requirement. Bonus shares from perks will not be granted if an investor submits multiple investments that, when combined, meet the perk requirement. All perks occur when the offering is completed.

Additional Bonuses

WeatherFlow-Tempest Loyalty Bonus

All investors who purchased shares in WeatherFlow-Tempest during our previous StartEngine Offering will receive an additional 15% bonus shares. This bonus is in addition to any time-based or amount-based bonus. For example, if you are an existing WeatherFlow-Tempest owner and buy an additional 100 shares in the first ten days of this campaign, you will receive a 10% time-based bonus PLUS a 15% owners’ bonus, for a total of 25%, meaning you will own 125 shares for $275.

StartEngine OWNers' Bonus

WeatherFlow-Tempest, Inc. will offer 10% additional bonus shares for all investments that are committed by investors that are eligible for the StartEngine Crowdfunding Inc. OWNer's bonus.

This means eligible StartEngine shareholders will receive a 10% bonus for any shares they purchase in this offering. For example, if you buy 100 shares of Common Stock at $2.75 / share, you will receive 10 additional shares of Common Stock, meaning you'll own 110 shares for $275. Fractional shares will not be distributed and share bonuses will be determined by rounding down to the nearest whole share.

This 10% Bonus is only valid during the investors' eligibility period. Investors eligible for this bonus will also have priority if they are on a waitlist to invest and the company surpasses its maximum funding goal. They will have the first opportunity to invest should room in the offering become available if prior investments are canceled or fail.

Investors will receive the highest single bonus they are eligible for among the bonuses based on the amount invested and time of offering elapsed (if any). Eligible investors will also receive the Owner’s Bonus and the WeatherFlow-Tempest Loyalty Bonus in addition to the aforementioned bonus.


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Tempest Ambassador Program sets new sales record

Meteorologist and influencer Ryan Hall recently began promoting Tempest to his audience of weather watchers and generated nearly $100,000 in sales in his first three days as an official Tempest Ambassador!  Our Ambassador Program enables brand supporters with an audience and platform to benefit from their passion for Tempest, earning a commission from each Tempest sold through their efforts. Ryan’s start set a new record for the fastest to $100k, but he is just one of many in this evolving program.  As the Tempest Network has grown, so has the buzz around it!  We are thrilled to see passionate customers become ambassadors, and it’s clear the program is escalating into a huge revenue driver.  

We believe raising capital on the StartEngine platform furthers our mission and creates brand equity by treating brand ambassadors, customers, and investors as one. This new sales record serves as great confirmation. We hope you agree!  

Keep in mind that time is running out to invest. With just 16 days left in our campaign, please join us now!


20 Days Left to Invest!

Join over 2,000 investors who have helped raise more than $3M on the StartEngine platform ($1M raised in the last seven weeks of this current campaign) to help our company scale. With several new strategic partnerships finalized in the last few weeks alone, 2023 is on pace with our strong growth targets. We believe it will be a breakthrough year in many respects! Don't miss out on this opportunity. Please invest soon!


Tempest Partners with Clemson University

WeatherFlow-Tempest and Clemson University are spearheading an innovative effort to establish a mesonet in South Carolina, deploying Tempest Weather Stations across the state. The Clemson Weather Network consists of Tempests sited at rural locations with minimal weather monitoring technology to help fill gaps in weather coverage. The hyperlocal weather measurements Tempest provides are critical to fruit growers and farmers in the region and help inform the South Carolina state climate office that sets drought declarations. Learn more >>>

This is not the first time Tempests have been leveraged to create a statewide weather network. The Baron Critical Weather Institute has also installed a statewide, high-density WeatherNet in Alabama, with at least one Tempest Weather Station and camera in every county in the state. 

Thirty-eight states in the U.S. are currently operating or building networks of weather monitoring stations to provide more granular data than that received from the National Weather Service. They’re using that neighborhood-level information to help improve weather forecasting and severe storm warnings and inform farming practices. Learn More >>>


Campaign Closes in 30 Days

We have an important and exciting update!  In order to accommodate additional investors, we are extending our StartEngine campaign by one month. Join us now and invest in a growing company with proven traction and limitless potential!  

Thanks largely to our passionate community of Tempest System owners and other customers eager to share our success, we have raised over $3mm in our two StartEngine campaigns to date. With this second raise, we have been able to reach a wider audience of investors that have embraced our mission, and it’s clear the interest from this broader group is just starting to build. To support this momentum, we are following guidance to extend our campaign beyond its unusually short two-month time frame. Our new closing date of April 6, 2023, gives us more time to close and share news on several exciting projects currently underway. Stay tuned! 


Campaign Tops $1 Million!

We are thrilled to see our campaign surpass the $1M mark ($3.5M combined raised on StartEngine). Thank you to the many investors who share our vision. We look forward to expanding our market with you as shareholders!  

Our growth as a company has been community-driven, which is why we refer to our journey as a shared one. It’s evident in everything we do, from customer feedback and feature improvements to this crowdfunding campaign. We believe raising capital on the StartEngine platform furthers our mission and creates brand equity as we treat brand ambassadors, customers, and investors as one. We hope you’ll join us. 


Tempest Featured in Better Homes and Gardens

We are delighted by recent media coverage of the Tempest Weather System, including Gadget Flow’s roundup of the Best Smart Home Gadgets Under $500 and Better Homes and Gardens' article, The 7 Best Rain Gauges of 2023 to Keep Your Garden Thriving. We believe Tempest is fast becoming an indispensable part of the smart home ecosystem, informing automation triggers and saving users time, energy, water, and money. 

We encourage our campaign followers to invest soon and become part of our success story! Have questions about this opportunity? Reach our team by commenting in the Discussion section of our campaign.


WeatherBug-Tempest Network Experiencing an Explosive Start!

Tempest recently teamed up with the popular app WeatherBug to provide hyper-local weather data through the WeatherBug-Tempest Network, and the early results are fantastic! Tempest owners can use their weather station as the data source for WeatherBug’s Observations feature and can also share their station’s weather data with other users. WeatherBug’s 15 million unique monthly users are also encouraged to buy a Tempest, an element of the app integration that has generated well over 500 Tempest sales since it started rolling out in late December 2022. 

The integration with WeatherBug provides both their app users and our Tempest owners with even greater utility and value and provides a new platform to promote Tempest. While already proving to be a success, we believe it’s just the beginning of a powerful partnership! 


Tempest + Rachio Named Best New Smart Devices of CES 2023

Some of the biggest technology companies in the world converged in Las Vegas last month for CES, the biggest tech trade show of the year. CES sets the tone for the rest of the year in tech, highlighting trends, announcing new products, and showcasing promising new startups with the potential to disrupt the existing market.

WeatherFlow-Tempest CEO Buck Lyons attended CES with the team from Rachio to present their smart watering integration. The products work in sync with the Tempest Weather System used as the weather source for the Rachio Smart Sprinkler Controller, informing features like Rain Skip, Wind Skip, Freeze Skip, and more. Users see at least 20% more efficient watering with a sprinkler system that responds to the weather in their backyard.

“Rachio, a leader and pioneer in smart outdoor water systems, introduced their new Outdoor Smart Water Technology, which included a smart hose timer, a smart sprinkler controller, and a smart weather station (Tempest). This was the first complete smart outdoor watering system we have seen paired with a smart weather station. We have found this to be a missing element of good smart water systems, especially if it rains a lot around your area but not at your home.” Read more at GearBrain >>> 


Inspiration and Ideas at the AMS Annual Meeting

A delegation from team WeatherFlow-Tempest attended the American Meteorological Society's Annual Meeting last week. The theme for this year was: "Data: Driving Science. Informing Decisions. Enriching Humanity." Very fitting, given our company’s mission of helping the world understand and manage the enormous impact of weather. The event provides a valuable opportunity to share ideas and dialogue with other industry experts about the weather, water, and climate. 

The team also used the gathering to meet with several key strategic partners and workshop priority projects, including updates to the Tempest App, the remote cellular version of the Tempest Weather System currently being field tested, and much more. 

From right: WeatherFlow-Tempest CEO Buck Lyons, CTO David St. John, Chief Scientist Dr. Jeff Copeland,  Senior Atmospheric Scientist Dr. Feng Gao, Atmospheric Scientist Dr. Stacey Kawecki, Meteorologist Brad Wells, Director of Software Development Corrine Butcher, Weather Data Scientist Dr. Brody Fuchs, and Chief Science Officer Dr. Martin Bell.


WeatherFlow-Tempest hits the ground running!

Thank you for helping create a tremendous start to our journey on StartEngine!  We’ve raised more than $400,000 in our first few days. The momentum feels incredible, and we are just getting started. 

Since our first successful campaign on StartEngine, we have grown our team, expanded into new markets, and launched several exciting new partnerships. Thanks to our progress, we’ve noted many investors from our first raise have purchased additional shares. We are thrilled to see a growing community of supporters who share our vision now able to play a part in our success. Welcome!

We have several exciting developments underway that we will announce here soon. In the meantime, keep up with all things WeatherFlow-Tempest on Twitter, Facebook, and LinkedIn, and subscribe to our monthly Tempest Newsletter.

Owners bonus
Stack Owner's Bonus & Rewards!

Members get an extra 10% shares in addition to rewards below!


Multiple investments in an offering cannot be combined to qualify for a larger campaign perk. Get rewarded for investing more into WeatherFlow-Tempest, Inc..


Earn 10% Bonus Shares

Earn 10% bonus shares in this investment and all eligible investments for an entire year. If you are not already an Owners bonus holder, you can join now, for $275, billed annually.


Tier 1

Invest $385+ and receive a 10% discount on our products for one year + TempestHoodie.


Tier 2

Invest $1,000+ and receive a 15% discount on our products for one year + Tempest Hoodie.


Tier 3

Invest $2,500+ and receive a 15% discount on our products for two years + Tempest Hoodie + 5% bonus shares.


Tier 4

Invest $5,000+ and receive a 15% discount on our products for five years + Tempest Hoodie + 10% bonus shares.


Tier 5

Invest $10,000+ and receive a 20% discount on our products for five years + Tempest Hoodie + 15% bonus shares.


Tier 6

Invest $20,000+ and receive a 20% discount on our products for five years + Tempest Hoodie + 25% bonus shares.




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