ESRI Living Atlas (real time live sync with esri)
https://transparentgov.net/json2tree/esri/vendor/atlas/atlas.live.html
static
https://transparentgov.net/json2tree/esri/vendor/atlas/atlas.static.html
Atlas - arcgis online (real time live sync with esri)
https://transparentgov.net/json2tree/esri/atlas.live2.html
https://transparentgov.net/json2tree/esri/vendor/atlas/atlas.static2.html
ESRI official website
https://livingatlas.arcgis.com/en/browse/#d=1
Most used map, US weather status
https://livingatlas.arcgis.com/livefeeds-status/