This is a precautionary measure to allow plenty of time ahead of the game with Cardiff on Saturday to announce if there are potential problems.
The snow overnight on Wednesday into Thursday has been to the West of London with areas of Wales and the West Country badly affected.
Hopefully London will remain clear.
More rain / sleet and snow it expected into Friday but the BBC forecast is predicting a cold but clear day in London on Saturday.
It's the overall saefty of travelling fans that has to be considered including travel issues rather than just if the weather is good or bad.
Keep checking on Friday for news from The Valley.