Weather and tyres

Hi im just wondering if some one could explain a few things please?

It says that the weather is taken from live weather data but it doesnt seem to match and weather reports that iv googled, what weather system does it use? Im trying to workout which tyres will be best for the race as the weather report said chance of rain so I used intermediates and I was 10 sec down in qualifying so had to pit first lap to swap to full wets.

How do you know when to use ints, soft or full wet prior to the race? ( couldnt find a brief guide on this)

We race at 19:00 and the weather says day and night report so which report would be best to look at?

Thanks for your help

http://igpmanager.com/play/?url=forum-thread/3798

The inters will cope with changing conditions. If the track is completely wet you need the wets

Hi Andrew,
            Thanks for your quick reply. I have had a look on www.wunderground.com for the weather on hungary tomoz and it says sunny all day with cloudy at night and 10% chance of rain yet igp manager says cloudy with 70% chance of rain in the evening. I presume were looking at night as were racing at 19:00?

Thanks