Forecasters today issued an alert that thundery rainstorms are expected in the Portsmouth area.
The Met Office said areas of rain, locally thundery, will develop across the south east during this afternoon, evening and overnight.
A spokesman said: ‘This will be heavy at times and may lead to some localised disruption.
‘Lightning will be an additional hazard, especially across areas south of Birmingham.
‘Heavy rain may lead to localised rainfall accumulations of 20-30 mm in 1-2 hours, with some places perhaps seeing 40-60 mm in 3-6 hours. This may cause some travel disruption during rush hour this evening. The threat of heavy rain ‘will clear eastwards later in the night, clearing western parts of the warning area by around midnight.’