What do you make of the fact that for an "average" season, the tail towards the end of the season extends out in time, while this isn't the case in the min, max, or current year shown (all featuring a sharp drop at the end)?Do you think this is a reflection of a few anomalous years with large/lingering SWE?
Yeah, that's weird. I think there may be a couple of issues there. One is the "statistics of small numbers." The other is the fact that the SNOTEL measurements are a bit questionable at low values. Some stations zero out sometimes at something a bit above zero. One certainly shouldn't interpret that as a realistic end of snow cover trend.