A COOLER & WET START TO THE NEW WEEK (OVERNIGHT RAIN & COOLER CONDITIONS, WITH A SOUTHERLY CHANGE).
(SUMMARY – SUNDAY EVENING 6:35PM)
Good evening. High cloud and mild conditions have dominated our Sunday, norwest winds have been strong at times about the High Country and upper inland parts of the Canterbury Plains. Christchurch, Akaroa and Rangiora grabbed top honours with 26 degrees, while Arthur’s Pass Village managed just 13 degrees and has scattered rain currently.
This evening keep an eye on strong to gale force NW winds about the Canterbury High Country, Foothills & Plains, winds may ‘touch down’ for coastal areas this evening, before southerlies develop in the early hours of Monday morning. We currently have an ‘Alert’ in place for strong winds, which ends tonight at 11pm. (Take care over our alpine passes before midnight).
YOUR OFFICIAL DAILY ‘HIGHS’ FOR SUNDAY – Christchurch 26, Akaroa 26, Rangiora 26, Rolleston 25, Kaikoura 24, Twizel 24, Geraldine 24, Timaru 24, Darfield 24, Amberley 24, Oxford 23, Culverden 23, Ashburton 23, Darfield 23, Methven 22, Hanmer Springs 22, Castle Hill Village 19, Mt Cook Village 19, Arthur’s Pass 13.
RAINFALL TODAY – We did see brief spill over showers early this morning, but it’s remained dry for most. It’s raining near the Main Divide and we can expect significant totals by midnight for the Canterbury Headwaters. In the early hours of Monday morning rain will gradually move north, with southerlies and become widespread, with most areas recording 5-10mm by 6am Monday morning.
BRIEF SUMMARY (MAIN POINTS)
1. Heavy rain will develop near the Main Divide this evening and then become widespread across Canterbury overnight, with colder southerlies developing. Take care with strong NW winds across most of Canterbury this evening; gusts will be severe about the High Country and may ‘touch down’ across Coastal Canterbury later this evening. As is always the case norwest gales will be hit and miss for coastal areas. A CWU ‘Extreme Weather Alert’ is in place with more details, similar to a Metservice Warning, just with more detail.
2. Early next week is looking slightly unsettled, with a constant shift in computer modelling. We now have an overnight southerly tonight which now looks set to bring a period of rain and showers on Monday. So a cooler unsettled start to the new week.
3.We’ll end the month under high pressure = sunny, settled and traditional weather. No significant weather in the next 10 days currently.
GENERAL SUMMARY FOR CANTERBURY – PLEASE CHECK YOUR TOWN FORECAST FOR MORE SPECIFIC INFORMATION (Town pages will be updated this evening.)
THIS EVENING & TONIGHT: Extensive high cloud, with occasional sunny spells possible out east. Heavy rain near the Main Divide and for areas 15km to the east. Strong to gale force NW winds about the High Country and upper parts of the Canterbury Plains, severe gale at times. Gusty NW winds may touch down for coastal areas, hit & miss in nature. Overnight southerly change, with widespread rain developing and snow above 1500m about the ranges. Overnight Low: 9-11 degrees.
MONDAY: Morning rain for most, easing to showers around midday in the south and further north by early afternoon. Strong cold southerlies about Coastal Canterbury, easing in the afternoon. Cooler conditions. Light snow above 1600m about the ranges before midday. Mostly dry and sunny by evening across the region. H: 14-16 L: 9-11
TUESDAY: Mostly fine, with early low cloud burning off. Chance of a few early morning showers north of Banks Peninsula before midday. Southerlies easing about Coastal Canterbury & turning NE about the coast. Light winds inland. H: 20-22 L: 10-12.
WEDNESDAY: Mostly fine, with early low cloud or fog burning off. Sunny, with light winds inland, NE winds freshening about Coastal areas. Warmer inland. H: 20-23 L: 8-11
THURSDAY: Superb weather under high pressure. Early low cloud burning off. Sunny & settled weather across the region. Warm conditions. H: 22-26 L: 9-12
FRIDAY: Rain developing, with colder southerlies across the region. Chance of heavy falls during the morning. Snow about the ranges above 1400m. Cooler day time temperatures. H: 14-16 L:12-14.
The ‘Situation’ will be reviewed & updated around 7:00am Monday morning.
Weather Analyst: Russell Voice
(C) Copyright NZ Regional Weather Updates Ltd 2018
Z Regional Weather Updates Ltd 2018