more than a few minutes, but here you go.
Thats at 1/10th of a second, flash set to slow speed sync in the Fn menu, everything on the flash left on auto. Slow speed sync really does pretty good. I threw away about 10 shots of this same scene before I remembered to try slow-speed sync, and this one finally came out. Now I'll just have to try to get down there when it's not snowing (gone down twice now and it was snowing both times).