Nonetheless, a typical day of April airmass convection is anticipated, with numerous showers developing during the day. Instability is sufficient for a few thunderstorms, although a lack of any significant shear will result in pulse-type modes with relatively short lifespans per individual thunderstorm. As a result, it is hard to justify upgrading any particular area to a SLGT at this stage - although current thinking would favour a zone from Devon across southern counties of England/south Midlands to southern portions of East Anglia (including London) as the area most favoured for lightning activity. Hence a low-end SLGT has been added to highlight this zone better.

Some small hail is likely in the most intense cells, and given slack flow there will be scope for a weak funnel cloud / tornado etc, especially near convergence zones. Some cause for concern in eastern Scotland given low-level convergence / slack flow, which may result in prolonged heavy showers bringing the risk of some localised flooding.