GrayCloud – a modern Dark Sky alternative
I miss Dark Sky, so I built my own weather app. Here's how GrayCloud works: * Raincast: minute-by-minute rain prediction and accumulation tracking for your exact location * Forecasts: 10 day forecasts use multiple high resolution sources and correct for bias at your location. * Alerts: rain starting, stopping, severe weather, daily summary and more * Widgets: home and lock screen widgets * Multi-platform: apple watch and mac apps I use NOAA and ECMWF models for core weather data and a custom model to compute rain accumulation and the next 60 minute radar movements. I also offer Apple…
GrayCloud – a modern Dark Sky alternative launched on June 4, 2026 with 8 votes, #1,599 of 22,647 launches that month and more than 75% of that year's launches.
What it does
GraySky is a hyperlocal weather app for iPhone, iPad, Mac, Apple Watch, Android and Garmin. Minute-by-minute rain alerts, live rainfall totals and NOAA data in your pocket.
The GraySky model reads the best available source for each region. Briefings and forecast discussions from your local NWS office. Track past and upcoming rain for your lawn, farm, or garden. Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Every alert you can think of, from daily summaries to Special Weather Statements. Higher is better. A score of 100 means the stated chance of rain matched reality perfectly. Lower is better. A Brier score of 0 is a perfect forecast; it is the standard measure of probability accuracy. Across more than 300,000 hourly forecast checks per service, GraySky earned an…from graycloud.app
In the maker’s words, at launch
I miss Dark Sky, so I built my own weather app. Here's how GrayCloud works: * Raincast: minute-by-minute rain prediction and accumulation tracking for your exact location * Forecasts: 10 day forecasts use multiple high resolution sources and correct for bias at your location. * Alerts: rain starting, stopping, severe…
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Weather Watching2025 · walzr.com · ▲94I was walking around New York last month during some light rain and noticed about half the people had umbrellas open. When the rain picked up a few minutes later, that number jumped closer to 80%. It got me thinking it'd be cool to track this somehow, so I built a website! I am taking a sidewalk livestream, feeding it into a YOLO model for people tracking, then sending a frame of each detected person to Gemini 2.0 Flash, which returns structured JSON about each person's clothing and if they're holding an umbrella. I also had fun making the site look like a TV weather channel. I showed some…
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