Gage

Train correlation

Test correlation

Test RMSE (1000 ac-ft)

Efficiency

Lead time (year)

Combination of indices

Weber River near Oakley

0.49

0.72

33.95

0.02

4

PDO + ENSO

Chalk Creek at Coalville

0.57

0.61

19.01

-

4

PDO + ENSO

Sevier River at Hatch

0.62

0.87

41.68

0.60

2

PDO + NAO

Muddy Creek near Emery

0.90

0.82

7.13

0.61

2

PDO + NAO