Busan Umbrella Alert
A personal automation that cross-checks Busan rain forecasts against two sources and sends a Telegram reminder to grab an umbrella before you leave.
A personal automation project running on Cloudflare Workers. It pulls rain forecasts for Busan from two sources — Korea's KMA and Norway's Yr.no — compares them, and sends a one-line Telegram message before you head out: bring an umbrella.
The reason for two sources is simple. Forecasts disagree, and the worst failure mode is false reassurance — telling you it won't rain when it will. So the design centers on one thing: when forecasts diverge, the tool must not hand out false comfort.
It runs entirely on the Workers free tier, no server involved. The code is complete and is currently awaiting deployment.
Systems and features
- Cross-validates rain forecasts from two sources: Korea's KMA and Norway's Yr.no
- Designed so that disagreeing forecasts never turn into false reassurance
- Sends an umbrella reminder via Telegram before you leave
- No server — runs on the Cloudflare Workers free tier at zero cost
Current status: Code complete; awaiting deployment.
Ideas and feedback are welcome
If this project makes you want to say something — a direction, a doubt, a feature idea — send it over. Prototype-stage projects change shape based on exactly this kind of input.
Search terms
부산 우산 알림 · weather alert · Cloudflare Workers · Telegram bot · KMA Yr.no · 부산 날씨 알림 · 우산 알림 텔레그램 봇 · 기상청 API 자동화 · weather forecast cross-validation · Cloudflare Workers weather bot · Telegram umbrella alert · serverless personal automation