Cyclone Pam Updates - Tuesday 17 March 2015

Tuesday 17th March 2015 4pm

HANNAH MOES, METSERVICE METEOROLOGIST

At midday on Tuesday the centre of Cyclone Pam was located about 280km northeast of the Chatham Islands, with a central pressure of 945hPa.

Tropical Cyclone Pam Updates - Sunday 15 March 2015

Sunday 15 March 2015 10pm

RAMON OOSTERKAMP, MANAGER FORECASTING OPERATIONS

At 9pm Tropical Cyclone “Pam”, a Category 3 Cyclone, is lying near 32.8S 178.5E, or about 500km east-northeast of Cape Reinga moving swiftly southeast at 55 km/h. We are expecting “Pam” to recurve a little southward before passing about 150km east of East Cape at midday tomorrow.

Tropical Cyclone Pam Updates - Thursday 12 March 2015

Update Thursday 12th March at 5:30pm

JOHN LAW, METSERVICE METEOROLOGIST

The forecasting team continue to monitor the progression of Tropical Cyclone Pam. By comparing the forecast tracks of several models the team have compiled a best track forecast for the position of the centre of the system as it tracks southwards.

Tropical Cyclone Pam Updates - Wednesday 11 March

Update Wednesday 11th March, afternoon

JOHN LAW, METSERVICE METEOROLOGIST

From the Severe Weather Outlook issued at 2.34pm today, here’s the latest view on Pam’s potential effects on New Zealand:

Tropical Cyclone Pam Updates - Tuesday 10 March 2015

Update for Tuesday afternoon, 10 March 2015

JOHN LAW, METSERVICE METEOROLOGIST

The latest guidance and advice from the Fiji Meteorological Service has upgraded Tropical Cyclone Pam to a category 2. This means that sustained wind speeds close to the centre of the system are in excess of 90km/h. The system is forecast to continue strengthening as it moves slowly to the southeast. At 1pm, New Zealand time, TC Pam was located at 9.7°S 170.4°E, with a central pressure of 985hPa. The latest track and position information can be found on the Fiji Met Service website.

Sea State and Swell

The MetService team produces both coastal and recreational marine forecasts. Part of these forecasts includes the state of the sea and the swell. But what is the difference? Firstly, it is important to understand how a wave is described. Figure one shows the different characteristics of a wave.