White smoke from A/C vents in dashboard

[Pakblogger2012]

Yesterday when I was travelling within Lahore driving Corrola Xli 09 model ,I observed gusts of white smoke coming from vents in dashboard esp central two vents . Heater was off ,fan speed was also at zero and in recirculation mode.I feared some problem and checked water temp gauge which was normal .Further I would mention that I was on rushy road and most of time I was in first gear .Anyway after getting out of rushy patch I stopped the car and checked under the hood there was so sign of any problem .radiator fan was also working normal.I got the car to nearby electrician .He said all is okay . I started journey again and after travelling about 50 km I stopped again and got checked from 2nd electrician he also said all normal.
Please guide why it was there white smoke and how can I get rid of that.

[mr.arslan1]

Did you experience any burning smell from smoke ? Usually a clogged cabin filter causes smoke from air vents when running a.c

[capsat]

cabin humidity & temprature from ac vents difference cause the MIST which you believe is smoke. relax nothing to worry at all.

[VCheng]

Hypercooled water vapor can look like milky smoke. Normal, specially in airplanes.

[Pakblogger2012]

A.c was also off and there was no burning smell.The smell was like it comes from hot air when heater works.

[Pakblogger2012]

May be MiST is the right word which I should use .It was visible and it was not continuos .

[mr.arslan1]

The heater core gets moist due to cold, when it got heated up as you drove, it released steam.

[Pakblogger2012]

So it is weather based phenomenon and need not to worry .I was thinking why it does not happen with all cars then ??

[TM]

Was there fog outside? If yes, fikar not. @capsat has explained it in very easy words.
No doubt a couple of years ago when I experienced it for the first time and was in similar situation as you are in... aur time kay saath aadat hoo gayi

[Pakblogger2012]

Yes there was fog outside .