Source: MetService
Covering period of Thu 04 – Mon 08 September – West-northwest breezes and passing cloud for the final two days of Zespri AIMS games in Tauranga
Auckland starts off wet on Saturday but come kick off there’s just a risk of brief rain with chilly southwest winds
Father’s Day is a bit of a mixed bag; some rain spreads up the country with southwesterly winds
A blood moon is due in the western sky around 6am on Monday morning
MetService has issued a number of Severe Weather Forecasts for strong northwest winds and heavy rain as an active frontal system moves up the country while the working week winds down.
The most likely severe weather is about the Canterbury High Country and headwaters with Orange Warnings for northwest winds and heavy rain, but there’s several Watches for Heavy Rain and Strong winds around the country.
The heavy rain has kicked off for the west coast of the South Island today (Thursday) with a few thunderstorms making it on land around Fiordland and southern Westland. Western areas are most at risk of rain today but as we head into Friday the wet weather extends northward with Wellington seeing passing showers through the day and the main frontal rain band arriving at night.
Thunderstorms are forecast to mostly remain around southern and western parts of the South Island, however, some may sneak across the alps into the likes of Queenstown Lakes. The thunderstorms bring risk of hail, blustery winds and potential snow down to around 400m.
MetService meteorologist Lewis Ferris warns, “Much of the North Island will wake up to rain on Saturday but it will be tending drier as the front keeps on trucking away to the northeast. There’s not much reprieve though – a cool southwest change moves onto Southland Saturday evening and zips up the country. It might be breakfast in bed rather than a round of golf for Dad on Sunday.”
Northwest winds make for some warm temperatures in eastern areas today and tomorrow. These highs are short lived as the southwest winds remind us that spring is a time of yoyoing temperatures. Christchurch is going for 18°C on Friday and 11°C on Saturday.
A brief ridge of high pressure is forecast across the country on Monday morning so there’s a good chance for many to spot the blood moon.
Understanding MetService Severe Weather Warning System
Severe Thunderstorm Warnings (Localised Red Warning) – take cover now:
This warning is a red warning for a localised area.
When extremely severe weather is occurring or will do within the hour.
Severe thunderstorms have the ability to have significant impacts for an area indicated in the warning.
In the event of a Severe Thunderstorm Red Warning: Act now!
Red Warnings are about taking immediate action:
When extremely severe weather is imminent or is occurring
Issued when an event is expected to be among the worst that we get – it will have significant impact and it is possible that a lot of people will be affected
In the event of a Red Warning: Act now!
Orange Warnings are about taking action:
When severe weather is imminent or is occurring
Typically issued 1 – 3 days in advance of potential severe weather
In the event of an Orange Warning: Take action.
Thunderstorm Watch means thunderstorms are possible, be alert and consider action
Show the area that thunderstorms are most likely to occur during the validity period.
Although thunderstorms are often localised, the whole area is on watch as it is difficult to know exactly where the severe thunderstorm will occur within the mapped area.
During a thunderstorm Watch: Stay alert and take action if necessary.
Watches are about being alert:
When severe weather is possible, but not sufficiently imminent or certain for a warning to be issued
Typically issued 1 – 3 days in advance of potential severe weather.
During a Watch: Stay alert
Outlooks are about looking ahead:
To provide advanced information on possible future Watches and/or Warnings
Issued routinely once or twice a day
Recommendation: Plan.
