Precipitation is a nasty variable to deal with because it is eposodic and it can fall as rain or snow. Spring discharge at high elevations minimizes this problem because it is driven by air temperature - a well-behaved variable.

Although a constant parameter model of spring air temperature-driven discharge estimates discharges that are too high at first (when nights are cold) and too low later (when snow melt occurs around-the-clock), at least the wiggles appear in the right places. We can do better with a variable parameter model that accounts for seasonality, a focus of future work.