How does Almanac highlight watersheds on the map?

How does Almanac highlight watersheds on the map?

Almanac ties each tributary to its watershed geography so map and storm tools can show where rain and runoff matter — including per-watershed precipitation observations that feed storm detection — then surfaces current conditions for the rivers inside those drainages on Explorer and river pages. A watershed (drainage basin) is the land area that sheds water into a river. Highlighting watersheds matters because a radar cell over the upper basin can raise a gauge hours before rain reaches the mouth. Each covered tributary is associated with the geography Almanac monitors for precipitation and response. NEXRAD and MRMS-style observations are stored as river precip readings (rate and rolling accumulations) with source priority, so storm detection can say rain is on this basin now, not only that there is a chance of rain in the county. Explorer and related map layers emphasize the active drainage and the rivers inside it when an angler inspects a tributary or a storm pulse. Once a watershed is in focus, anglers still see the same live fishability stack — flow, temperature, clarity, and lifecycle — for the rivers Almanac covers there. Two rivers a few miles apart can sit in different response regimes. Watershed highlighting keeps the map honest about which land got the rain, which is the difference between driving west and waiting until tomorrow.