The start of the week sees a dramatic temperature divide across the UK as a cold front edges in from the west.

Ahead of this cold front however, eastern portions are clinging on to the heat in what's known as the warm sector, with temperatures widely hitting the mid to high twenties in these areas.

The heat is further exacerbated by the foehn effect in some north-eastern areas, such as east of Inverness across north-east Scotland from south-westerly air flowing over the Cairngorms.

Elgin has seen the mercury rise to around 28°C during Monday afternoon, 11°C above average for the time of year, with 27°C in Lossimouth and 25.4°C in Kinloss too.

The foehn effect occurs when more moist, cooler air on one side of a mountain crosses over and descends on the other side as drier air.

Dry air can warm quicker than moist air, so on the lee side of the mountain, conditions are often sunnier and warmer - in this case the north-east side of the mountains in a south-westerly air flow.

The foehn effect can happen anywhere in the world, as long as there is a wind and some mountains where the larger the mountains, the larger the warming affect can be.