The Scottish Environmental Protection Agency (Sepa) has urged people in the North West and Central Highlands to “be prepared, be aware” as flooding is expected.

Those attending Scotland’s biggest Hogmanay celebration in Edinburgh are being advised to dress for all weathers and check social media for updates.

More widespread disruption is expected on New Year’s Day as another area of low pressure moves across the UK.

The strongest winds will be over England and Wales with gusts near 70mph over coasts and hills in the south and west.

About 30mm of heavy rainfall is expected widely across the UK. Rain is forecast to be heavier in Wales on Wednesday, which could bring some flooding.

Possible snowfall may lead to disruption in Northern Ireland, Scotland and northern England.

Forecasters said 10cm of snow was expected in some areas with heavier falls over hills with blizzards and drifting.

The Met Office said there was “potential for the pattern of warnings to shift and possibly escalate in some areas”.

Those travelling and with plans over the New Year are being urged to check the latest forecasts.

Network Rail said trains on some lines will need to be slowed down due to the difficult weather conditions.

The yellow weather warnings come after thick fog caused disruption to hundreds of flights at some of the UK’s major airports over the weekend.

Gatwick Airport reported continued delays on Sunday, and flights at Manchester, Glasgow and Cardiff were also affected on Friday and Saturday due to poor visibility.