Severe Thunderstorm Watch Get File

Severe Thunderstorm Watch

Issued :
Probability/Confidance Map
Valid Till

Severe Thunderstorm Criteria

MetService 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 who are the providers of this data