Environment Canada has updated its rainfall warning criteria. Previously, a warning was issued if 50 millimeters of rain was expected within 24 hours. Now, they may issue alerts for less rain, especially if it could lead to significant impacts.
John Wagar, a meteorologist, explains that alerts will be tiered. If rain is expected to severely affect an area, it could be escalated to a higher warning level. For example, a serious event like the atmospheric river in 2021 that caused major flooding in Nanaimo would be a “red alert.” These alerts indicate widespread impacts and longer recovery times.
Wagar added that even though atmospheric rivers are common in British Columbia, the impact determines the alert level. The goal is to give people quick and clear information, so they understand what to expect from the weather.
In addition to rainfall alerts, weather watches will also be categorized. These are issued ahead of a storm when specific details are still unclear. They provide early warnings so communities can prepare.
Recent studies show that extreme weather events are becoming more frequent. According to a report from the Intergovernmental Panel on Climate Change (IPCC), climate change is increasing the intensity of storms globally. This trend highlights the importance of updated warning systems that can effectively communicate risks to the public.
For more details about these alerts, you can check Environment Canada’s official page here.
Keeping communities informed about weather changes is vital. As we face more unpredictable climate conditions, understanding these alerts can help us prepare and respond effectively.
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