11 degrees this morning (0 windchill) and my quadruple glove system wasn't cutting it. Tingling and numbness were setting in within the first mile.
I think I've read that the perfect elbow angle for running form is 90 degrees. I've tried to do that but find it annoying and prefer a more acute angle. I think that contributes to my hand coldness problems since the higher hands impact blood flow.
So, today, as the coldness was becoming unbearable, I switched to running with straight elbows and hands all the way down my side. Wala (as Gianmarco says), after about 100 yards, blood settled in the fingers and the tingling and numbness stopped. I repeated that for another 100 yards every mile or so and was able to make it through the run.
I don't know why it always takes me so long to think of simple solutions.