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Hail and Ice Precipitation Quiz

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Questions and Answers

What is hail?

Tiny grains of ice known as graupel

Translucent ice pellets falling in cold weather

Solid precipitation consisting of balls or irregular lumps of ice (correct)

Delicately crystalline flakes or needles made of rime ice

How do ice pellets differ from hail?

Hailstones usually measure between 5 mm (0.2 in) and 15 cm (6 in) in diameter, unlike ice pellets

Ice pellets generally fall in cold weather, while hail growth is greatly inhibited during low surface temperatures (correct)

Hail forms near the interiors of continents, while ice pellets are confined to high elevations in the tropics

Ice pellets are coded GS, whereas hail 5 mm or greater is coded GR in METAR reporting

What is the METAR reporting code for hail 5 mm or greater?

GR (correct)

Under what conditions is hail formation possible?

Hail formation requires environments of strong, upward motion of air within the parent thunderstorm and lowered heights of the freezing level Signup and view all the answers

How can hail-producing thunderstorms be detected?

Using weather satellites and weather radar imagery Signup and view all the answers

What distinguishes hail from ice pellets?

Hail measures between 5 mm and 15 cm in diameter, while ice pellets are smaller and measure about 1-5 mm Signup and view all the answers

In what type of weather do ice pellets generally fall?

Cold weather Signup and view all the answers

What is the METAR reporting code for hail 5 mm or greater?

GR Signup and view all the answers

How does hail formation differ in mid-latitudes and the tropics?

Hail forms near the interiors of continents in mid-latitudes, while it tends to be confined to high elevations in the tropics Signup and view all the answers