I took care of a 5yo Malamute bitch for two and half weeks beginning just before Christmas last year. Her name was Zoe, and she was very gentle, inquisitive and playful. She had a very interesting habit however. Whenever a police or ambulance siren could be heard in the distance, which is not very often here, she would howl up at the sky in a haunting, long tone. I could just imagine her on the ice in the Arctic circle somewhere howling at the moon in another incarnation. She would howl way before the noise was audible as well, very sensitive and smart creature that she is.
That was beautiful. I could picture her from the way you wrote that. Harm howls like that, too, sometimes.