Data sources & update details
Each layer has its own coverage and update frequency. Observation time, retrieval time, and scheduled dates mean different things.
| Layer | Primary source | Updates & coverage |
|---|---|---|
| Weather | NOAA / National Weather Service | Fetched when the page opens. Hourly forecast values are forecasts, not current weather-station observations. |
| River flows | USGS / NOAA water data | Fetched on page open or Refresh data. Saved readings provide a fallback; observation times and older readings are labeled. |
| Snow observations | USDA NRCS AWDB | Daily snow depth and snow water equivalent fetched on page open or refresh. Charts show the available last seven days. |
| Fish stocking | California Department of Fish and Wildlife | Dated schedule copy, checked October 8, 2026. Open CDFW for the newest changes. Scheduled week does not confirm completion. |
| Campground amenities | Recreation.gov | Primary campground listings checked October 8, 2026. Availability, season openings, and closures are checked on the official site. |
| California snow surveys | California Department of Water Resources | Official resource link; measurements are not imported into this site. |
| Roads & public land | Caltrans / US Forest Service | Official resource links; live road status is not monitored here. |