What this shows
The Upper Missouri River Basin is divided into ACE grid cells, each sized to hold one Mesonet station. A cell is shaded by how far along its station is: operational, scheduled for a given install year, under construction, or still available. Dots — white on the dark themes, near-black on the light one — mark the actual station locations. Cell assignments are provisional and change as siting work proceeds.
Data
Station status is read live from the Montana Climate Office station registry on every load. Grid geometry is packaged with this page; county, watershed, and tribal-land overlays stream from the MCO data service when you turn them on.