Plenty of potential for some rather juicy thunderstorms today. As always, just because they are forecast, it doesn't mean that everyone in an area will get one - its quite possible for one town to be hit badly and the other stay dry.
So we have a low pressure interacting with a trough, to destabilise the atmosphere. High values of CAPE (convective available potential energy) However, the risk is still fairly marginal at present.
I think the strongest risk is to the west of the IOW this afternoon, evening, then developing further north in the west as we go through the night, where storms could become severe. Potential for large hail, frequent lightning and flash flooding. A low potential at present for funnel clouds.