The Met Office told Hillingdon is Here that snow showers are expected between about 8am and 9am around the Hillingdon Borough, making road conditions potentially treacherous.
Mark Wilson, meteorologist from the Met Office, told Hillingdon is Here this evening: “Around rush hour tomorrow morning we could see some snow. There's definitely that risk between about 8am and 9am tomorrow morning, lasting for about an hour or so because that is when the last band of snow is coming down from the north, with very strong winds.”
While conditions have been wet today and snow has been melting, there is a chance some may settle, Mr Wilson warned.
Rob Bryan, Temporary Chief Inspector for Hillingdon, warned drivers to wary of the change in conditions.
He said: “Snow always slows traffic and queues will be longer tomorrow morning. It will take you longer to drive to work.
“My advice is to take your time, leave earlier if you have to drive and leave plenty of room to the car in front. Be very mindful of bike riders and make sure all snow is cleared from your car before you start your journey.”
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After 9pm tonight, Mr Wilson said he expected it to be clear for the rest of the night, though it will be very cold with strong winds and significant wind chill, he cautioned, with temperatures of – 1 degrees Celsius or – 2. It will feel significantly below freezing because of the strong northerly winds, he said.
Mr Wilson said any snow tomorrow won't last as long as what was seen today and this evening but it looks like it's going to affect much of the south-east.
The weather tomorrow should improve after 10am, he said, with the rest of the day pretty dry, but it will be “bitterly cold” and the wind chill will make it feel like freezing or below.
He said that from Saturday it will “get less wintery”, mainly dry, though still chilly.
Sunday there will be milder air coming, so temperatures are forecast to rise up to 9 degrees Celsius, he said.