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Hail Size as Related to Objects (Storm Prediction Center)

CONVERTING TRADITIONAL HAIL SIZE DESCRIPTIONS

Traditional object-to-size conversion for assessment and translation of severe hail reports. We encourage measurement, not estimation, of hail size.

HAIL SIZE (in.)

OBJECT ANALOG REPORTED

.50

Marble, moth ball

.75

Penny

.88

Nickel

1.00

Quarter

1.25

Half dollar

1.50

Walnut, ping pong

1.75

Golf ball

2.00

Hen egg

2.50

Tennis ball

2.75

Baseball

3.00

Tea cup

4.00

Softball

4.50

Grapefruit

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