How does the MetService Weather Warning system work? Given the weather over New Zealand during the next few day we thought it would be timely to remind you of how our warning system works. The video below was used in 2019 when we changed to a colour coded warning system. Did you know MetService issues two levels of Severe Weather Warnings? An Orange Warning is issued when forecasted wind, snow or rain is predicted to reach certain criteria. An Orange Warning means there could be noticeable impac