Severe Thunderstorm Watch
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Severe Thunderstorm CriteriaMetService uses the following criteria for severe thunderstoms in New Zealand: Heavy rain (from thunderstoms): Rainfall of 25 millimetres per hour, or more.Large hail: Hailstones 20 millimetres in diameter, or larger. Strong wind gusts (from thunderstorms): Gusts of 110 kilometres per hour (60 knots) or stronger. Damaging tornadoes: Fujita F1 (wind speeds greater than 116 kilometres per hour (63 knots)) or stronger. Note: some tornadic systems such as funnel clouds, waterspouts and small land-based tornadoes are possible with thunderstorms that may not be classified as severe. | |
| Be Advised: Before making decisions based on this data please see the information at metservice.com who are the providers of this data | |