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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.

$1,598,220.78 Raised


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.

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.

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
$10k - $2.5M
Common Stock
Common Stock

Maximum Number of Shares Offered subject to adjustment for bonus shares

Most Recent Fiscal Year-End

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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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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..



John Moore

5 days ago

When will we see countertop display screen? Will greatly improve the user experience and provide a branding opportunity to all house guests…



Ryan Cabell

4 months ago

Has there been any update on the hoodie / discounts for investors? I haven't seen any email recently.



Darrin Johnson

5 months ago

How to I get the 10% discount on your products after investing this round?



Jeffrey Hobbs

5 months ago

Thank you!



Jeffrey Hobbs

5 months ago

What is the trading symbol for this investment? I own 1,150 shares. My email is for anyone who has an answer. Thanks!



Randy Gebhardt

5 months ago

How do I get the sweatshirt from the Tier 1 investment?



justin shuy

6 months ago

I have a product, but my concern is over what are you doing to make them better? Mine has never measured wind correctly, or at all, and now it goes offline all the time. So, if that happens so quickly how did you make it better? If not you're just going to bleed customers (and past investors) like myself. Updates? Better tech? Where does this money go to keep those people and get more?



Yosef Hertz

6 months ago

As a current investor I wanted to share a company I came across, that seems to be very innovative and growing quickly in your space. I don’t know if they’re a way WeatherFlow-Tempest can work with them, this is FYI. Also, can you update what your YTD revenue is and percent recurring? Any other updates with partnership, and importantly government (Navy) contracts would be helpful as well. Thanks!



Richard Koch

6 months ago

Can you help me understand the scope of your Navy contract? I used to perform some data analysis and "problem child" identification of modifications and replacement programs for Air Force Weather. Are you outfitting vessels and/or will your system(s) replace legacy ground based airfield systems with your sensor suite? (And displays I assume) Will fielding be accomplished via a replacement program or a modification program? I've seen what happens when lyfe cycle extension technical insertions were forced by senior leadership via the, "Field it now, fix it later" theory of operation because mod money was easier to justify than acquisitions money. Most importantly, are you the depot? If do, for how long? Is it a CPFF contract?



Richard Koch

8 months ago

Is your intent to further automate the weather observation and dissemination process via ingest of observed parameters into an AI forecast network? I notice you're not addressing transmissivity or runway visual range, so is aviation weather off the table? I also saw where you're supporting the Navy, but what about Air Force? They provide all weather support for the Air Force, Space Force and the Army--in the field and in-garrison. Do you plan to add weather bouys or ingest NOAA data? What about the ingest of satellite data and it's sourcing?




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