JX105 Thunderstorms and Hazards Flashcards
What does the presence of Roll and Wall Clouds indicate?
Wind Shear and Turbulence
What are the 3 requirements for thunderstorm development?
Moisture
Unstable Air
Lifting Action
A ____ forms on the surface at the leading edge of a storm.
Gust Front
A microburst has highly localized donward atmospheric flow with velocities of _____ to over ______ feet per minute.
2000 to over 6000 feet per minutes
Microbursts produces wind shears of ___ to ____ knots
20 to 200 knots
What are some visual cues of a potential micro burst?
Virga
Localized blowing dust
Shaft of rain which diverges closer to the ground
Thunderstorms
What is the primary purpose of on board radar?
To avoid isolated cells
NOT for thunderstorm penetration
What are 3 methods of avoiding thunderstorms?
Circumnavigate isolated thunderstorms
Over the top (at least 1000 feet higher for every 10 knots of wind speed at cloud top level)
Underneath (Altitude margin - 1/3 distance fromg ground to cloud base
Penetrate _____ to minimize time in a storm
Perpendicular
