Hail Reference Chart

Report The Largest Size Observed And Any Hail Covering The Ground. 

MEASUREMENTS:  Measure The Outside Diameter, The Longest End-To-End Axis.

1/4-3/8″   Pea Size
1/2″    Small Marble Size
3/4″Penny Size
7/8″Nickel Size
1″Quarter Size
1 1/4″Half Dollar Size
1 1/2″Walnut/Ping Pong Ball Size
1 3/4″Golf Ball Size
2″Lime/Hen Egg Size
2 1/2″Tennis Ball Size
2 3/4″Baseball Size
3″Large Apple
4″Softball Size
4 1/2″Grapefruit Size
4 3/4″ – 5″Computer CD / DVD Size
8″US Record

The Hail chart applies only to the counties served by the NWS Milwaukee/Sullivan office: 

Milwaukee, Racine, Kenosha, Walworth, Waukesha, Ozaukee, Sheboygan, Washington, Fond Du Lac, 

Rock, Green, Lafayette, Iowa, Dane, Dodge, Columbia, Marquette, Green Lake, , Richland, Sauk

Wind Speed Estimates
Beaufort NumberDescriptionSpeedVisual Clues and Damage Effects
0CalmCalmCalm wind. Smoke rises vertically with little if any drift.
1Light Air1-3 MPHDirection of wind shown by smoke drift, not by wind vanes. Little if any movement with flags. Wind barely moves tree leaves.
2Light Breeze4-7 MPHWind felt on face. Leaves rustle and small twigs move. Ordinary wind vanes move.
3Gentle Breeze8-12 MPHLeaves and small twigs in constant motion. Wind blows up dry leaves from the ground. Flags are extended out.
4Moderate Breeze13-18 MPHWind moves small branches. Wind raises dust and loose paper from the ground and drives them along.
5Fresh Breeze19-24 MPHLarge branches and small trees in leaf begin to sway. Crested wavelets form on inland lakes and large rivers.
6Strong Breeze25-31 MPHLarge branches in continuous motion. Whistling sounds heard in overhead or nearby power and telephone lines. Umbrellas used with difficulty.
7Near Gale32-38 MPHWhole trees in motion. Inconvenience felt when walking against the wind.
8Gale39-46 MPHWind breaks twigs and small branches. Wind generally impedes walking.
9Strong Gale47-54 MPHStructural damage occurs, such as chimney covers, roofing tiles blown off, and television antennas damaged. Ground is littered with many small twigs and broken branches.
10Whole Gale55-63 MPHConsiderable structural damage occurs, especially on roofs. Small trees may be blown over and uprooted.
11Storm Force64-75 MPHWidespread damage occurs. Larger trees blown over and uprooted.
12Hurricane ForceOver 75 MPHSevere and extensive damage. Roofs can be peeled off. Windows broken. Trees uprooted. RVs and small mobile homes overturned. Moving automobiles can be pushed off the roadways.

All references to trees are for trees with foliage. Significantly higher winds may be required to cause similar damage to trees without foliage. Also, very wet soil conditions may allow weaker winds of 30-57 MPH to uproot trees.