October 10, 2011

A broad trough of low pressure should move across New Zealand during this week, bringing with it several features that are likely to mean unsettled weather for many parts of the country through until the weekend.

The first part of this trough is a small and intense low pressure system which is expected to move onto the southern South Island tonight. The frontal system accompanying this low is likely to bring a period of heavy rain to many places as it passes by tonight and during Tuesday.

“We have issued a heavy rain Warning for Bay of Plenty, Rotorua, and Nelson,” said MetService Weather Ambassador Bob McDavitt. “We have also put in place a heavy rain Watch for all areas from Taranaki to Gisborne northwards, along with Buller and Westland.”

McDavitt added that the front is preceded by a vigorous northerly flow with winds that may reach gale force around exposed northern coasts. “Onshore winds in the Bay of Plenty are expected to peak on Tuesday morning, producing waves with heights of occasionally around three metres, and these waves are not expected to ease until Thursday.”

On Tuesday, there may also be a risk of thunderstorms in the warm and unstable air over central and northern parts of the North Island.

A cooler southerly flow is expected to spread over the South Island by the weekend.

Those making school holiday plans are able to keep up to date with the latest weather forecasts at metservice.com or, on mobile devices, at m.metservice.com.

For further information please contact:
Bob McDavitt Weather Ambassador (09)377 4831

MetService issues Warnings, Watches and Outlooks for severe weather over New Zealand.
Warnings are about taking action:
* When severe weather is imminent or is occurring
* Issued only when required
* Recommendation: ACT
Watches are about being alert:
* When severe weather is possible, but not sufficiently imminent or certain for a Warning to be issued
* Issued only when required
* Recommendation: BE READY
Outlooks are about looking ahead:
* To provide advance information on possible future Watches and/or Warnings
* Issued routinely once or twice a day
* Recommendation: PLAN

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