One yellow rain warning covers much of southern England and south-east Wales. The warning started from 2am earlier today and lasts to 6am on Friday.
Another yellow snow and ice warnings covers southern and central Scotland from 6pm on Thursday to 3pm on Friday.
Meanwhile in Northern Ireland, the warning starts from 10am on Thursday until 6pm on Friday. Up to 3-4 inches of snow could fall in both Scotland and Northern Ireland
According to the Met Office temperatures fell to below zero in several places last night. The Lairg area of northern Scotland fell to -7c.
The weather alerts have been issued across the UK
There have also been warnings of potential disruption to travel throughout today.
National network manager at National Highways Amy Shaw said: "Freezing conditions bring hazards such as snow and ice, so take every possible step to understand your journey in advance and allow lots of extra time when travelling to prepare for the unexpected.
"It is therefore always important to plan ahead for your journey, check the weather forecasts, and if weather conditions become challenging, adjust your driving behaviour and take extra care."