sorry, but you are indeed stuck with the ticket as purchased ... short of a weather waiver or day-of-departure IROPS, no changes, no refunds, no credits, nada
two words: travel insurance
not sure if your calendar is compatible, but Alaska has a 930pm LAX-SEA on Mon 4 Feb ($101 saver, $131 Main Cabin, $279 F) and Mon 11 Feb ($79 saver, $109 Main, $254 F) ...