Our local news stations are reporting serious delays for security screening at SeaTac airport. The blame is being placed on "several cruise ships unloading thousands of passengers" at the same time on Saturday. Delays of up to an hour and a half are being reported. They are expecting this to continue the rest of the summer on "cruise ship days".
Check your return flight times if you are traveling through SeaTac and be sure you have enough time if you hit the hour and half delay. Especially important if you are coming down from Canada and have already been delayed at the border.
Hope this info saves someone from missing a flight home.