The second yellow weather warning is in effect across much of the UK and advises of some regions which are likely to see further severe thunderstorms, but with significant uncertainty in location and timing.
The warning, which is in force from midnight to 11.59pm on Wednesday, advises of a small chance of homes and businesses could be flooded quickly, with damage to some buildings from floodwater, lightning strikes, hail or strong winds.
For the region covered by the warning, the forecaster warned that many parts will see a good deal of dry weather, but areas of thunderstorms are likely to develop over parts of the UK or nearby continent.
These thunderstorm conditions will generally track north or north-westwards, potentially affecting many parts of the UK at some point.
Eastern Scotland looks most at risk during the early hours of Wednesday, then southern parts of the UK see the risk increasing later in the day. Where the storms occur the will be intense.
Rainfall totals of up to 1.6 inches (40mm) could fall in an hour, with some locations potentially receiving up to 3.1 inches (80mm) in three hours, although these will be fairly isolated.
Large hail, frequent lightning and gusty winds will be additional hazards.