You definitely are no math wizard. The graph looks crappy because of the lower drainage areas (BELOW THE GORGE) have no snow. The upper areas are plum full of the white stuff. My suggestion would be for you to leave "paradise" for a day and drive north to the Freemont Pass area...your view may change.
MATH 101: A+B+C+D+E= X : divide X by 5 = average.
A graph is an average that is calculated on all of the drainages. If 2 drainages have very low numbers, then that will GREATLY affect the "average." If you look at each individual drainage you will see that the drainages that start from Salida up to the source ---Freemont 112%, Brumley(Independence) 107%, Apishapa 100%, Porphyry Creek 85% --- are doing very well. The drainages below the Royal Gorge are really low. Remember last year? It was the dead opposite. Low numbers at the upper drainages, and high numbers at the lower drainages. What was the peak flow from that? It was bigger than Beaner's "PESSIMISTIC" 1850CFS guess.
The peak flow will depend on May's weather. Wet and rainy it will go BIG...dry, windy, and hot it will be much lower.
Just my opinion...