Weather
Thunderstorms are expected to form over the South Island this afternoon. Some of these may be severe with
localised downpours, 25 to 40mm per hour and hail possibly larger than 20mm from the Nelson Lakes and south through the central South Island to inland Otago, Clutha and the east of Southland as indicated on the chart.
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. Large hail can cause significant damage to crops, orchards, vines, glasshouses and vehicles, as well as make driving conditions hazardous.
Note: A Severe Thunderstorm Watch means conditions are favourable for severe thunderstorms in and close to the watch area. People in these areas should be on the lookout for threatening weather conditions and monitor for possible Severe Thunderstorm Warnings.