"However, by the weekend the ridge of high pressure
bringing the fine weather to southern parts should extend across most areas of the British Isles, including Wales."
Throughout the week, the weather bureau said the habagat will be temporarily weak, while a ridge of high pressure
area or an anti-cyclone system will be the dominant weather system to affect Luzon.
Two ingredients appear to have conspired to bring this most recent heatwave to fruition: an abnormally strong ridge of high pressure
and a hefty dose of dry, dust-laden Saharan air.
The state weather bureau also said the ridge of high pressure
area affecting the eastern portion of Luzon will continue to bring warm weather all over the country.
"Storm Hannah will move away from the UK during Saturday followed by a transient ridge of high pressure
bringing more settled weather to the UK for Sunday, good news for London Marathon runners."
The easterlies and ridge of high pressure
area are its dominant weather systems.
The National Centre of Meteorology (NCM) said there is currently an extension of a surface trough lies over the Western and southern parts of the country, accompanied with an upper ridge of high pressure
The country will be on the edge of a ridge of high pressure
which will lure the very mild flow towards the UK from south of the Azores, pushing temperatures to unseasonably mild levels.
A surface high pressure extends over the country, with a surface low pressure over most areas of the Arabian Peninsula, accompanied with an upper ridge of high pressure
"Next week temperatures will recover slowly after a chilly start to the week with a ridge of high pressure
before low pressure takes over.
Welsh weather presenter Derek Brockway said: "Sunday is the better day of the weekend thanks to a ridge of high pressure
. Perfect for the Cardiff Half Marathon.