Horowhenua District Council is closely monitoring a complex weather system expected to bring periods of heavy rain and potential impacts across the district from this evening.

MetService has issued a Heavy Rain Watch for Horowhenua, with forecasts indicating two weather systems will affect the region - one moving up from the south today, followed by a second system from the north overnight.

These systems are expected to be slow-moving, with periods of high-intensity rainfall and the potential for thunderstorms and localised downpours. While Horowhenua currently sits under a lower-level watch, conditions in surrounding areas are more severe, with a Red Warning in place for Wellington and an Orange Warning for the Tararua Range.

What this means for Horowhenua

Council is particularly mindful of the volume of rain forecast for the Tararua Range. Current modelling suggests 200-250mm could fall in some areas. If this rainfall tracks further west, it could increase the risk of river rises, localised flooding, and slips within Horowhenua.

Council preparations underway

Council has activated a duty manager approach and is monitoring conditions around the clock through to Wednesday. Contractors, emergency services, and partner agencies are engaged and ready to respond if required. An Emergency Operations Centre (EOC) is on standby and will be activated if conditions escalate.

As a precaution, Kimberley Reserve has been closed.

There is also the potential for the Moutoa floodgates to be operated tomorrow if required.

When to expect impacts

The first period of heavier rain is expected around midnight, with another potential peak between 6am and 7am tomorrow morning. Forecasts will be updated again by MetService at 9pm this evening.

What residents should do

Residents are encouraged to stay informed and take simple precautions:

• Clear gutters and drains around your property
• Secure loose outdoor items
• Avoid driving through floodwater
• Keep an eye on rising water levels in streams and drains
• Stay up to date with official weather forecasts and Council channels

Stay informed

This is a complex and evolving weather event, and conditions may change quickly. Council will provide updates as more information becomes available.

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