Alert opened: 30 May 2026
Heavy Rain Watch
Period: 12hrs from 6am - 6pm Sun, 31 May
Area: Headwaters of the Otago lakes and rivers
Forecast: Periods of heavy rain, and amounts may approach warning criteria within 15 km east of the Divide. Thunderstorms possible. Moderate chance of upgrading to a Warning.
Heavy Rain Warning - Orange
Period: 37hrs from 6am Sun, 31 May - 7pm Mon, 1 Jun
Area: Headwaters of the Canterbury Lakes and Rivers
Forecast: Expect 400 to 500 mm of rain about the Divide, and 150 to 250 mm of rain within 15 km east of the Divide. Peak rates 20 to 25 mm/h. Thunderstorms possible. Minimal chance of upgrading to a Red Warning.
Impacts: Streams and rivers may rise rapidly. Surface flooding, slips, and difficult driving conditions possible.
Action: Clear your drains and gutters to prepare for heavy rain. Avoid low-lying areas and drive cautiously.
Issued: 9:53am Sat 30 May
Next update: 9:00pm Sat 30 May
Affected districts