The Met Office has issued a warning of potential thunderstorms tonight as bright sun turns to humid heat.
Salford is enjoying its hottest day of the year so far with temperatures peaking at 30°C.
But forecasters predict a hot and increasingly humid airmass moving north bringing the threat of heavy rain which could lead to flash flooding.
A yellow weather alert for rain has now been issued for Greater Manchester.
The Met Office’s Chief Forecaster said: “Isolated heavy thunderstorms are expected to develop during Wednesday across parts of northern England.
“With large amounts of energy in the atmosphere, storms could be severe, with torrential downpours, gusts up to 50mph and hail up to 1cm in diameter.”
As much as 20-30mm could fall inside an hour, putting pressure on transport networks and making roads unsafe.
The Met Office are now advising people to be extra careful on the roads tomorrow morning due the potential floods.
Any thundery showers should ease through the evening to leave a dry night with some clear spells. In Salford it will again be warm and muggy with a minimum temperature of 16°C.
In July 2014 Salford was hit by lightning storms with hundreds of readers sending in pictures and video of this incredible event.
Pictured: Salford Lightning Storms – 10 of the best
Watch: Stunning footage of Salford Lightning Storms
Forecasters had predicted hot and humid air moving up from the continent would cause torrential rain and stormy ‘Spanish plume’ weather.
The long thunderclaps started at around 3.15am on Satuday 18 July, waking locals and causing other to grab their phones and cameras to tweet and email amazing pictures to SalfordOnline.com
The storm lasted only two hours, with rain and dark skies clearing by dawn.
