WhichPhase combines multiple trusted public data systems into one streamlined planning utility. Rather than forcing users to check separate weather apps, moon charts, sunrise calculators, and mapping tools, WhichPhase brings essential planning information together in one faster experience.
WhichPhase uses Open-Meteo weather systems to help provide:
Open-Meteo may incorporate multiple forecast models and globally respected weather systems, including major international forecasting sources such as European forecasting models, to help improve planning reliability.
Weather forecasting is highly useful, but weather can still change quickly due to storms, terrain, elevation, wildfire smoke, coastlines, and local microclimates. Forecasts are estimates, not promises.
WhichPhase uses SunCalc calculations to estimate:
Sun, moon, and light timing calculations are generally reliable for planning, but visible real-world conditions may still be affected by cloud cover, smoke, mountains, haze, or atmospheric conditions.
WhichPhase uses Nominatim and OpenStreetMap geographic systems to help identify:
These systems help tailor weather, moon, and light calculations to specific locations. Search precision may vary depending on rural areas, mapping conventions, and regional naming systems.
WhichPhase may use Open-Meteo elevation estimates to support:
Elevation can vary dramatically within broader areas, especially in mountainous or uneven terrain. Local conditions may differ significantly from generalized area estimates.
For supported U.S. regions, WhichPhase may surface severe weather alerts using NOAA public alert systems.
Users should always rely on official emergency management, NOAA, local authorities, aviation systems, marine alerts, wildfire systems, avalanche centers, and ranger guidance for safety-critical decisions.
WhichPhase includes Light Mode, Dark Mode, and Ultra Dark Mode to support different real-world visibility conditions.
These display modes do not change the underlying data, but they improve practical usability depending on environment, time of day, and planning conditions.
Snow likelihood tools are intended for convenience and planning context only. They are not avalanche forecasts, road safety guarantees, or backcountry safety certifications.
Even trusted systems cannot perfectly predict:
WhichPhase is best used to reduce guesswork and improve timing, not replace official safety judgment.
WhichPhase is designed to simplify real-world decision-making by combining weather forecasting, sun, moon, and light timing, geographic search, elevation awareness, alerts, and planning tools into one practical utility.
The value of WhichPhase is not just raw data. It is practical integration:
WhichPhase uses trusted public systems including Open-Meteo, SunCalc, Nominatim, OpenStreetMap, and NOAA to support smarter planning.
WhichPhase is designed to help users make better-informed timing decisions while recognizing that weather, forecasts, destinations, and real-world conditions can always change.