Cold this morning at 25 F (-4 C). There was some melting yesterday, but it produced frozen ponds of black ice this morning. No issues other than having to slow down many times. Yesterday, coming in in the rain, I noticed that both my Planet bike superflashers were having problems. One was completey off and the other went spastic on me. Today they are fine. I will have to pay more attention to them when riding in the rain, because I do not remember having this problem before.