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HAIL SIZES
Measurements: Always measure the outside diameter or the longest axis.
Report the largest size observed and depth covering the ground.
SMALLMARBLE
Small marble is assumed 1/2")
Picture
GRAPEFRUIT size
Computer CD-DVD size
Previous record
(7/23/10, Vivian, South Dakota)
NWS Link Press Release
The Hail chart applies only to these S-E
Wisconsin counties: Milwaukee, Racine,
Kenosha, Walworth, Waukesha, Ozaukee, Sheboygan,
Washington, Fond Du Lac, Rock, Green, Lafayette, Iowa, Dane, Dodge,
Columbia, Marquette, Green Lake, , Richland, Sauk.
STRAIGHT-LINE WIND GUST ESTIMATES
Non severe
Large trees bend; twigs, small limbs break, and a few larger dead or weak branches may break. Old/weak structures (e.g., sheds, barns) may sustain minor damage (roof, doors). A few loose shingles removed from houses.
Severe = 58
Large limbs break; shallow rooted trees pushed over. Semi-trucks overturned. More significant damage to old / weak structures. Shingles, awnings removed from houses; damage to chimneys and antennas; mobile homes, carports incur minor structural damage; large billboard signs may be toppled.
Hurricane Force
Widespread tree damage (trees either broken or uprooted). Mobile homes may incur more significant structural damage; be pushed off foundations or overturned. Roofs may be partially peeled off industrial/commercial/warehouse buildings. Some minor roof damage to homes. Weak or open structures (e.g. farm buildings, airplane hangars) may be severely damaged.
Significant Severe
Groves of trees flattened. Mobile homes severely damaged; moderate roof damage to homes. Roofs partially peeled off homes and buildings. Barns and sheds completely demolished.
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.