Strange Leak
 

I have two '99 Town and Country vans, one of which has a strange leak from behind the glove box. When I first noticed it I was running the AC and I heard a sloshing noise and a quart or so of cold water leaked from somewhere behind the glove box onto the carpet below. My first thought was it was coming from the heater core, but as there was no antifreeze in it I discounted that idea. I then thought it might be coming from the part of the cooling system that holds the evaporator. I seem to remember that at some point I had the drain hose that removes condensation on another car years ago that had gotten stopped up and I fixed by blowing out stoppage with an air hose.
Recently I drove the car and as I was leaving my drive I heard a loud sloshing sound, along with about a gallon of water that poured out from behind the glove box. I hadn't driven the van in a couple of weeks during which time we had a lot of rain. I wondered if somehow rain water had gotten in around the area behind the glove box and was accumalated and then released when I started driving it. When I first noticed the leaking problem, I drove it up on ramps I use to change the oil and tried to find the drain hose from the AC system unsuccessfully. I wear bifocals and lying down looking up is a challenge at times.
If anyone can shed light on this problem I"d sure appreciate it.