New Zealand Weather Warnings: A Guide

New Zealand’s diverse landscape and location make it susceptible to a wide range of weather hazards. MetService, the country’s official weather authority, issues weather warnings to alert the public and emergency services to impending severe weather that could pose a risk to life, property, and infrastructure. Understanding these warnings is crucial for staying safe.

Types of Weather Warnings

MetService utilizes a tiered warning system. The severity of the warning depends on the expected impact of the weather. There are two primary categories:

• Watches: These are issued when conditions are favourable for severe weather to develop. A watch is a heads-up, encouraging people to be aware and prepared. It means severe weather is possible but not yet certain. Think of it as an early warning signal.
• Warnings: These are issued when severe weather is imminent or occurring. A warning signifies that severe weather is expected or is already happening, and immediate action is required to protect yourself and your property.

Within these categories, MetService issues specific warnings for various weather phenomena, including:

• Heavy Rain: Issued when significant rainfall is expected to cause flooding, slips, and disruption to transport. Rainfall amounts and intensity are key factors.
• Strong Wind: Issued when strong winds are likely to cause damage to trees, power lines, and unsecured objects. Wind speeds and gusts are considered.
• Heavy Snow: Issued when substantial snowfall is anticipated, potentially causing travel disruptions and isolation. Accumulation amounts and altitude are important.
• Severe Thunderstorm: Issued when thunderstorms with the potential for damaging winds, large hail, and heavy rain are expected.
• High Waves: Issued for coastal areas when large waves are expected, posing a risk to marine activities and coastal infrastructure. Wave height and period are considered.
• Marine Warnings: Specific warnings are issued for maritime areas, including gales, storm force winds, and hurricane force winds, impacting shipping and other marine activities.

Understanding the Warning Message

Each warning message typically includes the following information:

• The type of warning: (e.g., Heavy Rain Warning, Strong Wind Warning).
• The area affected: Specific regions or locations expected to be impacted.
• The period of validity: The start and end times of the warning.
• The expected intensity: A description of the expected rainfall amounts, wind speeds, snowfall accumulations, or wave heights.
• Potential impacts: A summary of the potential effects of the severe weather, such as flooding, slips, power outages, and travel disruptions.
• Recommended actions: Advice on what people should do to stay safe, such as avoiding unnecessary travel, securing loose objects, and staying informed.

Staying Informed

You can stay informed about weather warnings through the following channels:

• MetService Website: The official MetService website provides the most up-to-date warnings and forecasts.
• MetService App: A convenient way to receive push notifications for warnings in your area.
• Radio and Television: Major media outlets broadcast weather warnings.
• Civil Defence Emergency Management: Local Civil Defence organizations also disseminate warnings and provide emergency information.

Preparation is Key

Being prepared for severe weather is essential. This includes having an emergency kit with essential supplies, knowing your evacuation routes, and staying informed about the latest warnings. By understanding the different types of weather warnings and taking appropriate action, you can significantly reduce your risk during severe weather events in New Zealand.