Weather: Convective SIGMETS

Question 1

Who are Convective SIGMETS hazardous to?

Answer 1

People on the ground

Question 2

How long do Convective SIGMETS last? How often are they updated?

Answer 2

Valid up to 2 hours

Updated every hour

Question 3

What does a Convective SIGMET entail?

Answer 3

Line of thunderstorms (min 60 miles)
Embedded thunderstorms
Winds > 50 kts
Thunderstorms with heavy or greater precipitaiton
Tornado
Hail diameter >= 3/4 inch