Looking at Flightradar24, I noticed several AS flights from the Pacific Northwest adding an unscheduled stop in the Bay Area (SMF/OAK/SJC) on the way to Hawaii. This is due to stiff headwinds I imagine. For example, AS 843 from SEA-KOA is doing SEA-OAK-KOA, as shown below. The scheduled time of arrival (STA) of this flight into KOA is 2:25pm local time (Alaska's website cheated and displayed the STA into KOA in Pacific time), but the new estimate time of arrival is 4:41pm, more than 2 hours late!
The AS reroutes to Hawaii that I've found are:
Heck, even a DL 757 going from SEA-HNL turned back to SFO an hour over the Pacific!
Interestingly, AC and WS flights from YVR to Hawaii seem unaffected, instead taking a rather northerly route to Hawaii.