Heavy Rain Watch

• Period: 12hrs from 5pm Mon, 26 May - 5am Tue, 27 May
• Area: Northland
• Forecast: Periods of heavy rain with possible downpours. Amounts may approach warning criteria and possibly exceed them about localised areas, especially in downpours. Note, a Severe Thunderstorms Watch is also in place for Northland. Moderate chance of upgrading to a Warning.

Severe Thunderstorm Watch

• Period: 13hrs from 5pm Mon, 26 May - 6am Tue, 27 May
• Area: Northland, Auckland, Waikato, Waitomo, Taranaki
• Forecast: A front is expected to bring rain and a low risk of thunderstorms to western parts of the North Island from Taranaki northwards from this evening until around dawn Tuesday. Although the risk of thunderstorms is low, the risk of localised downpours occurring in this area is considered moderate. If they occur, downpours would likely produce rainfall rates of 25 to 40 mm/h. 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. Driving conditions will also be hazardous with surface flooding and poor visibility in heavy rain.