Thisguy1 said:
It's in the same corner of the kitchen, and we were thinking that's where the culprit was. I dug the soft spot up to the bottom of the foundation and once that area somewhat dried up we ran some water for a while and didn't notice anything, but not sure we would.
You're on the right track.
A lot of times the issue doesn't reveal itself in flowing water, standing water, sewer order or some other
overt sign.
If the kitchen drain is losing some percent of water each time you do dishes and run the sink it will keep the ground soggy and saturated. Then we have a rain (or in this case snow!) event and the ground is
super saturated like a sponge and it can't absorb any more... Now you finally become aware of it, but can't replicate the findings to detect it on your own.
You can either test the system under pressure on your own to confirm/deny the presence of a leak or hire it out to locate and then put together steps to get it remedied.
If you determine there is a leak under the slab, I'll point you in the right direction to tunnel underneath so that the plumbers can repair.