WarnWeather is a weather watchface for Pebble, inspired by ForecasWatch2. It packs a
whole day of temperature, precipitation probability+amount, UV-index and wind into a single graph, and keeps a
3-week calendar and a live rain radar one wrist-flick away.

TIME
- Current time
- Next sunrise or sunset time

FORECAST
- 24-hour weather forecast with configurable update frequency
- Current temperature
- Temperature forecast line
- Optional main metric (solid line) and optional second metric (drawn as bar-aligned square dots) — each
  independently shows precipitation %, wind speed, wind gusts, or UV index; the main-metric line can
  have a configurable fill
- Optional hourly rain bars — multicolor or white on color watches
- Optional day/night hatch shading on the graph
- Fahrenheit and Celsius temperatures
- Multiple weather providers: Weather Underground, OpenWeatherMap, Open-Meteo, and
  Deutscher Wetterdienst via Bright Sky (Germany only)
- GPS or manual location entry
- City where the forecast was fetched

RAIN RADAR (for now only available for Deutscher Wetterdienst)
- 2-hour precipitation nowcast in 5-minute frames — rain at your exact location plus
  the strongest rain approaching from within 2 km
- Switch between calendar and radar view with a flick or tap

CALENDAR
- 3-week calendar
- Highlight public holidays for your country — 150+ countries worldwide, with
  region/state granularity where holidays vary (Germany, Austria, Switzerland, Spain, UK,
  United States)
- Customize colors for Sundays, Saturdays, and holidays

WATCH STATUS
- Battery indicator
- Bluetooth connection indicator
- Vibrate on disconnect
- Quiet time indicator
- Sleep mode (battery-saving night pause)

CUSTOMIZATION
- Customize time font and color

UPDATES
- Update notifications: get a one-time heads-up when a newer version is available in the appstore.

PLATFORMS
- Pebble Classic, Pebble Steel, Pebble Time, Pebble Time Steel, Pebble 2, and
  Pebble Time 2