Take the hose off, then from under the hood push a wire back into the hole in the evaporator box. If this frees up a bunch of water you had (or maybe still have) a clog in the box. You need to first take the box out of the car (which requires removing the refrigerant from the A/C system then evacuating and recharging when done) to take the box apart. So hopefully just pushing a wire in will unclog it.

If the evaporator box is dry inside, like ej6 suggested, consider the possibility it may be rain water leaking in the body somehow.

 

This is happening in my car too so ima check it out.