08 Aug 2023 | 02:26 AM UTC
New Zealand: Heavy snowfall forecast across most of South Island through at least Aug. 10
Heavy snowfall forecast in most of South Island, New Zealand, through Aug. 10. Transport disruptions possible.
Event
Heavy snowfall is forecast across most of South Island through at least Aug. 10. The New Zealand National Meteorological Service (MetService) has warned of a cold front tracking northwards across the South Island Aug. 9 through early Aug. 10, bringing snow to low levels, especially in the south and east. Heavy snow may disrupt travel and could damage trees and powerlines, while cold conditions may cause stress for livestock. As of Aug. 8, the MetService has issued the following weather warnings:
Orange (middle level on a three-tier scale) Heavy Snow Warning: inland Canterbury about and north of Arthur's Pass, Marlborough south of Ward, and Nelson Lakes National Park. 20-30 cm (8-12 inches) of snow is likely above 300 meters (984 feet), with lesser amounts to 100 meters (328 feet).
Yellow Heavy Snow Watch: Buller, inland Canterbury south of Arthurs Pass, Fiordland, Otago south of a line Queenstown to Mosgiel, Southland, and western Tasman
Road Snowfall Warning: Dunedin to Waitati Highway (SH1), Haast Pass (SH6), Lewis Pass (SH7), Lindis Pass (SH8), Arthur's Pass (SH73), Porters Pass (SH73), Milford Road (SH94), and Crown Range Road.
Authorities will likely issue new alerts or update/rescind existing advisories as weather conditions change over the coming days.
Hazardous Conditions
In addition to the heavy snow, strong wind gusts will likely lead to periods of blowing and drifting snow; decreased visibility is likely in mountainous areas. Blizzard conditions are possible. Sporadic power outages are possible throughout the affected area.
Transport
Heavy snow could make driving hazardous in some areas; authorities may implement temporary road closures or detours in such locations. Mountain passes and tunnels could close as a precautionary measure during periods of intense snowfall. Flight delays and cancellations are possible at airports across the affected region, especially in areas where strong winds are likely. Authorities may temporarily suspend port operations if strong winds trigger hazardous sea conditions, impacting freight and passenger maritime traffic.
Advice
Monitor local media for weather-related updates and advisories. Seek updated information on road conditions before driving or routing shipments through areas where severe weather is forecast; plan for possible delivery delays throughout the affected area. Allow extra time to reach destinations and carry an emergency kit and warm clothes if driving is necessary, especially on secondary or rural routes that could become impassable. Charge battery-powered devices in the case of prolonged electricity outages.
