Pineapple Express...

No, not the stoner movie, this is the weather pattern where an atmospheric river created by the polar jet stream dipping south to the tropics, then curves back north to Alaska. It can transport huge amounts of water vapor, resulting in heavy rainfall and much warmer than normal temps. (Wikipedia)

So now all the snow that's fallen this month is rapidly melting and soon we'll be back to the sloppy mud we had in late Sept.