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White smoke could be as simple as condensation in exhaust from sitting overnight. I'd be more concerned if white smoke continued when warmed up.
The "miss" could be a bunch of things... When was last "healthy" tune up? Plugs, wires, ALL filters including fuel filter? I would start there, makes a good "ground zero" reference point and see if miss is still evident. You might also consider running a good fuel system cleaner w/next tank full of gas. Especially in winter months when temps fluctuate, condensation forms in tank. (water) Spark plugs & water don't get along well.
Does your vehicle sound a little bit louder then it used to when it was newer?
The white smoke is probably coming from the exhaust system, which you may have a gasket or seal gone on, which happens within time to every vehicle.
you're probably burning coolant. headgasket, cracked or warped head, intake manifold or gasket, or cracked block are your sources. Take it to a care car service to have it checked. Whatever it is, it's hard to diagnose just by the exhaust color. I had white smoke coming from the exhaust of the family van, it was a cracked block. That can certainly cause a multi-misfire. So have an ASE certified mechanic look it over, it could get expensive!
Check your oil, does it look like chocolate milk, if so you have blown a head gasket. Or you could just have a bad valve cover gasket, this allows oil to drain down onto the exhaust where it burns and as a result, white smoke. If you get enough of it, when you pull your plugs it will coat them in oil.
White smoke is caused by coolant or water coming out the tail pipe. There is a chance that the white smoke was caused by water splashing up from a puddle onto the exhaust pipe. Keep an eye on the coolant level in the radiator in any event.
Let us know how it goes or if the problem persists. We're looking forward to how things go for you.