Convective Sigmet (WST)

Convective Sigmet (WST)

A Convective Sigmet may be issued for any of the following;

  1. Severe thunderstorms due to:
    • surface winds 50 knots or greater.
    • hail at the surface greater than or equal to 3/4 inches in diameter.
    • tornadoes.
  2. Embedded thunderstorms.
  3. A line of thunderstorms.
  4. Thunderstorms greater than or equal to VIP level 4 affecting 40% or more of an area of at least 3,000 square miles.

Convective Sigmets (WST)

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Convective Sigmet (WST)