After yesterday鈥檚 rain it feels more like summer again today with plenty of sunshine and warmer temperatures.
Yesterday was very cool, only 9掳C in Tredegar which is more typical of November but today Cardiff reached 18掳C.
Tomorrow will be even warmer with a south-easterly breeze; temperatures rising to between 19 and 22掳C.
More cloud is expected tomorrow but it will still be bright at times with some hazy sunshine.
Tomorrow night into Saturday will turn increasingly muggy with warm, humid air over France moving northwards into the UK.
At the same time, fresher air over the Atlantic will move towards us and this will bring a risk of some torrential downpours and thunderstorms as the two different air masses collide.
Lightning strike in north Wales. Courtesy 成人论坛 Wales Nature Flickr group member Kev Lewis
This weather pattern is called a and occurs when very warm air moves north from Spain and reaches the British Isles on a southerly airflow, and low pressure over the Atlantic pushes a cold front eastwards.
The Met Office has issued a covering most of Wales except the far southwest and Pembrokeshire.
Forecasting exactly which places will be hit by thunderstorms can be difficult but at the moment it looks like parts of England, east and northeast Wales are at greatest risk on Saturday.
Large hailstones, gusty winds and flash flooding are possible but some places will escape.
Sunday promises to be a better day; fresher with sunny spells and a few scattered showers.
Top temperatures will range from 16 to 20掳C with a south to south-westerly breeze.