A westbound transcon is already close to the fuel range of an A320, and with the strong headwind from the storm pushing into the west coast, delay due to deicing, and possible delays in to SFO, I'm not surprised that a fuel stop was made. The flight crew and dispatch simply made a safe and prudent decision.
A few years ago I was watching an upcoming US A320 BOS-PHX route I had coming up on Flightaware. The flight probably made one fuel stop a week in MCI.
edit to add: SFO-HNL is actually ~200nm shorter straight line than JFK-SFO
Last edited by Lost; Jan 8, 2017 at 1:13 pm