The best alternatives to Weather Up are Cusp, Cloudnerd, and NWS Alerts. If these 3 options don't work for you, we've listed a few more alternatives below.
What do you think of Weather Up?
AssemblyAI— Speech-to-Text API with superhuman accuracy
Host a temporary group text, powered by SMS, that's anonymous and shareable anywhere. No app downloads. Optionally charge people to join, and earn. Groups are deactivated after the chosen duration - up to an hour. Host for free, or charge up to $50 to join.
A Widget like WPF Desktop Application with Windows 10 Toast Notifications alerting of dangerous weather. Alerts are fetched every 10 minutes from https://alerts.weather.gov. The Desktop Weather App parses weather updates once every 30 minutes.
Weather forecasts in your terminal that just works. No API keys or configuration required. Just download and run. Useful for writing scripts to run multiple weather forecasts in parallel.