Today vs. the historical norm
Each card shows today's reading against the min–median–max band recorded on this calendar day across every year on record — so you can see at a glance whether the river is running high or low for the season.
One station, year by year
Each line is a year's daily deviation from the long-run median for that calendar day — above the zero line ran higher than usual, below it ran lower. The grey band is the full historical min–max range. Toggle years below.
Compare stations
Overlay the daily curve for several stations. Pick a year, or the long-run median (climatology) for each station.