Gage

Train correlation

Test correlation

Test RMSE (1000 ac-ft)

Efficiency

Lead time (year)

Combination of indices

Weber River near Oakley

0.41

0.40

36.86

-

4

ENSO

Chalk Creek at Coalville

0.45

0.30

19.72

-

4

ENSO

Sevier River at Hatch

0.49

0.60

58.26

0.218

4

ENSO

Muddy Creek near Emery

0.14

0.35

10.15

0.199

4

AMO

Sevier River at Hatch

0.36

0.84

57.09

0.249

2

PDO^*

Muddy Creek near Emery

0.47

0.84

9.13

0.351

2

PDO^*