Nelson 7 day weather forecast, rain maps, rain radar and current conditions. See a list of all of the Official Weather Advisories, Warnings, and Severe Weather Alerts for Nelson, British Columbia, Canada. MetService is New Zealand’s national weather authority, providing accurate town, city and rural forecasts across the country. U.S. Gulf states prepare for dangerous impacts from Tropical Storm Cristobal See a list of all of the Official Weather Advisories, Warnings, and Severe Weather Alerts for Nelson, WI. See a list of all of the Official Weather Advisories, Warnings, and Severe Weather Alerts for Nelson, GA. See active alerts in Canada. Weather warnings issued. Nelson - Weather warnings issued 14-day forecast. for Nelson, BC, CA. ... BBC Weather in association with MeteoGroup. Forecast - Nelson.