Advarsler, Mount Valiant

Heavy Rain Warning - Orange Area: Headwaters of the Canterbury lakes and rivers south of the Hurunui River Forecast: Expect 160 to 220 mm of rain about the main divide, and 100 to 130 mm within 15 km farther east. Peak rates of 15 to 25 mm/h expected Saturday afternoon about the divide, especially in possible thunderstorms. Freezing level about 2600 metres. Impact: Streams and rivers may rise rapidly. Surface flooding, slips, and difficult driving conditions possible. Chance of upgrading to a Red Warning: Minimal. Impact: Action: Clear your drains and gutters to prepare for heavy rain. Avoid low-lying areas and drive cautiously.