A combination of afternoon heating and wind convergences are expected to develop thunderstorms over the region, and there is a moderate risk of these thunderstorms becoming severe in the afternoon and early evening, producing localised downpours of 25mm to 40mm, and hail of 10mm to 20mm diameter.
Thunderstorm activity should ease tonight. Rainfall of this intensity can cause surface and/or flash flooding, especially about low-lying areas such as streams, rivers or narrow valleys, and may also lead to slips.
People in these areas are being advised to take shelter and be prepared for strong winds and heavy rain.
