Weather experts have warned that frost and snow could hit British shores in the coming weeks.
Met Office forecasters announced the outlook for the remainder of January, and it has been found that a "sudden stratospheric warming" will change.
That sounds like something that could heat things up, but it will actually lower temperatures.
While it has been relatively mild in Bristol lately, from the middle of the week onwards, the mercury will slide down next week.
Forecasts say they are not sure how fast the weather is headed for the UK, but it is relatively slow compared to last year's "Beast from the East".
They expect the worst weather in late January or early February.
The forecast for Bristol predicts temperatures of 10 ° C by Wednesday – above the average for this season.
Temperatures will then drop to about 6 ° C on Thursday, reaching lows of 1 ° C at night.
What do meteorologists say?
Deputy chief meteorologist Martin Young said: "The latest forecast suggests that the highest risk of winter winters exists from the end of January to February.
"Whether cold spells are caused by Arctic air from the north or by eastern currents from the continent remains uncertain.
"Before this happens, however, we expect a fairly changeable and relatively mild period over the weekend and early next week, with most of us raining a bit.
"From the middle of next week, and especially in the last week of January and early February, the likelihood of cold weather throughout the UK is increasing.
"This would increase the risk of snow and widespread frost across most of the UK, but especially in the north.
"However, the cold weather may not affect the whole of Britain and it is still possible for milder and wetter deposits to push through this generally cold period, especially in the South."
Met Met Office UK Outlook from January 17th to 26th
The stormy, winter showers will continue on Thursday in northeastern areas, but will gradually subside. It is then populated most of the time before clouds and rain eruptions move east on Friday. The wind will initially be very stormy in the northeast, but it will subside for a while.
After that, it seems mostly cold, restless and sometimes windy, with storms in the north. All milder spells tend to be short and are associated with prolonged rains.
The rain could snow almost everywhere, especially in northern and central areas, especially at this time. Some drier, lighter jumps are likely, possibly with snow showers, especially in the east. During such spells, the frost could spread rapidly.
January 27 to February 10
In the last week of January and early February, the likelihood of cold weather throughout the UK increasing. Temperatures continue to descend and become colder or very cold. This would increase the risk of snow, ice and frost, especially in the north of the country.
However, uncertainty remains about the extent of the cold and the duration of the cold, and it is still possible for milder and wetter deposits to assert this generally cold period, especially in the south.