Trouble in River City

Each year the high water mark for the Colorado River, at least here, is right around 1 June. Over the last four or five days sand bars are developing in the middle of the river. There is still some snow in the La Sals and I don't know what the Rockies look like but it's generally been pretty warm the last couple weeks so just wondering how the river can go down during the snow melt unless there just isn't much snow up there.