FAR/AIM

Question 0

What is a convective sigmet bulletin?

Answer 0

Bulletins are issued hourly at H+55, if no convective sigmet are observed then “convective sigmet…none” will be reported

Question 1

What is a convective sigmet?

Answer 1

A convective sigmet is issued for severe thunderstorms due to

• surface winds greater than 50 knots
• tornadoes
• hail at surface greater than or more than 3/4 inch in diameter
• embedded thunderstorms
• line of thunderstorms
• thunderstorm producing precipitation greater than or equal to heavy precipitation affecting 40 percent or more of an area at least 3,000 square miles

Question 2

What does a convective sigmet imply?

Answer 2

Hazardous to all aircraft,
Severe or greater turbulence
Severe icing
Low level wind shear

Question 3

What is an airmet and different types?

Answer 3

Airmet is issued for lower intensities than sigmet
For general aviation smaller aircraft
- airmet Sierra for IFR and mountain obscurations
- airmet tango for moderate turbulence surface winds greater than 30 knots
- airmet Zulu for moderate icing

Question 4

What is the time requirements for a hold

Answer 4

1 minute - below 14,000

1 1/2 minutes - above 14,000

Question 5

What are the holding speeds?

Answer 5

0-6,000 - 200 knots
6,001- 14,000 - 230 knots
14,001 - + is 265 knots