The Department of Water Resources has updated the predictions for run off.
The maximum runoff dates have been pushed back and later due to cooler temperatures in the Sierra and unsettled weather with small storms moving through and frequent thunderstorm activity that seems to be ongoing.

Kern River at Isabella, May 17 PCT mile approx. 690
Kaweah River May 14 To West of PCT
Kings River May 17 PCT mile approx. 774
San Joaquin at Millerton, May 21 PCT mile approx. 880
Merced River at Happy Isles May 20 On the JMT
Tuolumne River May 31 PCT mile approx. 917
East Walker River June 10 PCT mile approx. 978

If cool weather persists expect these maximum flows to be delayed.