4:36 PM: The mapped outage started shortly after 4 pm and is affecting 3,639 customers. Some traffic signals are out on Roxbury – remember that a dark signal = 4-way stop. No official cause yet from SCL but multiple commenters on our West Seattle site report hearing booms just before losing power.
6:58 PM: The outage is over. Here’s what SCL tells us caused it: “It was caused by a compromised stem cable leading down into an underground feeder. Crews were able to isolate it and restore power.”