Here is a great podcast about winter active arthropods, a walk in the winter woods with Dr. Wayne Gall:

http://www.thefieldguidespodcast.com/new-blog/2021/3/27/ep-50-winter-insects-with-wayne-gall

Thanks to @larry522 for finding this!

I seem to have the best luck finding arthropods on snow on days when there is fresh snow on the ground and temperatures 20 to30F (-5 to 0C). A few snow flurries in the air are OK, but if there's heavy snow falling, the spiders and insects are nowhere to be seen. I also found more creatures in the deep woods than out in the open. How about you? In your experience, what weather conditions make a good day for arthropod hunting on snow?