1992 Colt moisture stalling

Hi.
New to this forum.
My problem is my colt 200e 1.5L automatic has a low rough idle and stalls but only during wet weather or snowy conditions when the heat of the engine melts the snow.
The problem disappears after the car has been running for 10 to 15 min. probaby the heat of the engine drys the area affected.
But what area is it?
Has this happened to anyone else?
Any Ideas?

Check your distributor cap. I had an 87 Plymouth Horizon that did the same thing. You might want to think about getting a new cap and wires (maybe even spark plugs, too). All those are not necessary, but certainly won't hurt.

The main thing I would check is to see if the distributor cap has a crack or break in it or if there's a shield around it, check that for cracks and breaks.