Severe Weather Criteria - KLFY News 10

Severe Weather Criteria

The National Weather Service defines a severe weather event according to the following criteria:

1. Damaging winds, defined as follows:

  • Measured or estimated convective wind gust of 50 knots (58 mph) or greater.
  • Trees, large limbs, power lines, large antennas or permanent signs blown down.
  • Roof or structural damage.
  • Windows broken by the wind.

2. Hail 3/4 inch (dime size) or greater in diameter.

3. Tornado or waterspout on the ground or water.

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