The situation

The situation

Issued at 5:18 pm on the 18th of July by Russell Voice

ANOTHER STUNNING DAY ON THE WAY – MORE SUNNY & SETTLED WEATHER FOR OUR THURSDAY.

(Updated 5:20pm Wednesday evening) 

Good evening. It’s been another superb day across Canterbury, with sunny skies and light winds for all. Christchurch took top honours for the second day running reaching a pleasant 15.4 degrees while Ashburton wasn’t far behind on 15.2. Our coolest spot was Mt Cook Village reaching just 7.4 degrees.

Tonight under clear skies and settled conditions we expect widespread frosts, with some inland areas & basins dropping to -3,-4 degrees overnight.

Your official daily ‘highs’ for Wednesday – Christchurch 15.4 Ashburtin 15, Culverden 14, Rolleston 14, Darfield 14, Rangiora 14, Timaru 14, Oxford 14, Methven 13, Waiau 14, Kaikoura 14, Geraldine 14,  Twizel 9, Arthur’s Pass Village 9, Castle Hill Village 9, Mt Cook Village 7.

Rainfall forecast until midnight 6:00am Thursday: Dry across the region.


BRIEF SUMMARY (MAIN POINTS)

The rest of the week is looking mostly fine, with milder than average temperatures out East across the Canterbury Plains Coast. While it will be superb out east, the weekend will be windy and wet about the High Country & Main Divide. Please source your town forecast for specific information.

We currently have a ‘Extreme Lookout’ in place for strong to gale force nor-west winds and heavy rain about the Main Divide & Canterbury High Country on Saturday. There is a chance gales may ‘touch’ down across the Canterbury Plains & Coast at various stages.  Our Lookout is similar to a MetService Lookout, just more detail for Canterbury.

Local ski fields will most likely close on Saturday, with severe gales; Sunday will be slightly calmer. Snow is likely about our local ski fields on Saturday & Sunday, especially our more Western fields; with lighter falls possible out east.

There is now the possibility of a colder southerly on Monday, with showers and light snow above 900m. We may cover this on town pages if we see more consistency overnight.

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SITUATION/OVERVIEW –   This week has a mostly spring feel, with a milder northerly airflow set to persist and dominate almost the entire working week. Temperatures will be around 2-3 degrees above average.  Winds switch more to the nor-west late Friday and continue through Saturday as an active system brings heavy rain for the Main Divide and strong to gale force nor-west winds for the Canterbury High Country & Main Divide; this system will then weaken on Sunday.

Early and middle stages of next week look fine and settled under high pressure.


GENERAL SUMMARY FOR CANTERBURY – PLEASE CHECK YOUR TOWN FORECAST FOR MORE SPECIFIC INFORMATION.

THIS EVENING & TONIGHT: Clear across the region, with light winds. Frosts developing for most inland areas.

THURSDAY: Sunny skies, with light morning frosts. Light northerlies.  Gusty NW winds and showers near the Main Divide, falling as snow above 1400m. H: 12-14 L: 1-5

FRIDAY: Sunny skies, with light winds through the day. High cloud developing by evening in the west. Showers at night about the Main Divide. H: 14-16 L: 2-5

SATURDAY: Sunny skies early on, but high cloud will become extensive through the afternoon. Spill over showers may reach the Canterbury Foothills at times. Gusty NW winds in exposed areas, turning gale at times from mid-morning; severe gale about higher exposed areas. Mild conditions out east. Heavy rain and snow above 1400m near the Main Divide. Extreme Lookout in place with extra details on rainfall totals and wind strengths. H: 14-16 L: 2-4

SUNDAY: Mostly fine, slightly cooler with a westerly airflow; a SW change may bring a few cloudy periods and the risk of a shower in the afternoon. H: 11-13 L: 1-4


Source our town pages for 1-7 day forecast for 23 towns across Canterbury – no computer-generated content and specific information for each town.

The ‘Situation’ will be reviewed & updated around or before 7:30pm Wednesday morning.

Weather Analyst: Russell Voice

Copyright NZ REGIONAL WEATHER UPDATES 2018

 

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