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Snow: 0.0 cm Snow: 0.0 cm Snow: 15.4 cm Snow: 0.2 cm Snow: 0.1 cm Snow: 0.2 cm Snow: 0.4 cm
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Temp: °C
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South Island Detailed Forecast

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The Mountainwatch Detailed Forecast is provided by our resident meteorology sensei "The Grasshopper". The South Island analysis is issued around 7am every morning (maybe later on weekends) and is intended to provide an additional human element to the automated forecast data provided above. Sometimes we won't agree exactly with the model data - but if we ever call something significantly different we'll do our best to explain why.

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7:00am Friday 28 August 2015

Conditions Summary:
Mostly clear with strong to gale force north-westerlies. Temperatures just above freezing in most resorts.

Synoptic Outlook:
Sorry to say it South Islanders but the next couple of days are going to be a bit messy. The same low that's been giving Australia quite a bit of the white stuff over the last few days is crossing the Tasman dragging a lot of mild air onto the South Island on strong northerly winds. But be patient as Sunday looks promising...

Those northerly winds will increase to gale force this afternoon as the low throws a front onto the South Island. Plenty of moisture will get pushed onto the divide. It will rain through the afternoon in most resorts becoming heavy overnight - especially along the divide in resorts such as Temple basin where 40-50mm could fall.

The rain will ease off through tomorrow afternoon as the centre of the low crosses the South Island to sit south of the Banks Peninsula. As it moves east on Sunday a cold front rushes up from the south. This will send snow showers piling in. Resorts exposed to the south and east should pick up 15-25 cm of wet snow through the afternoon. The temperature will plummet getting the snow down to 800-1000m by the evening. It will be mostly fine on Monday under a weak high.

Image of the day:

The weather will be like a rollercoaster over the next few days due to that low out to the north-west.:: Source:::: BOM (vandalised by the Grasshopper)

Friday 28 August:
Strong northerlies make wind hold likely in exposed spots. Increasing cloud with rain developing through the afternoon, heavy rain developing overnight on the divide (40-50mm). Mild.

Saturday 29 August:
Rain through the morning will gradually clear in the afternoon. Wind hold likely due to strong to gale force northerly winds.

Sunday 30 August:
Strong to gale force southerly winds pushing in heavy snow showers in the afternoon. 10-25 cm will fall depending on location. Wind hold likely. Temperature dropping.

Monday 31 August:
Mostly fine. Colder.

Extended Outlook:
The high will stick around for a few days meaning it will be mostly fine. Beyond the 5th of September things are looking a bit more unsettled but it is difficult to put details on any future lows at this point.

That's all from the Grasshopper. Wanna keep your finger on the pulse of all things snow? Join my weekly email list by filling in the box above. If you have a question or feedback for me join in the discussion below, or hit me up on facebook or twitter.

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Last updated - 54 minutes ago