2008 HAIL & WIND REFERENCE CHART
Milwaukee Area Skywarn Association

HAIL SIZE

DESCRIPTION

Measurements: Always measure the outside diameter or the longest axis.

Report the largest size observed and depth covering the ground.

1/4"  PEA size

 

1/2"

 "SMALL MARBLE"  (There is no Large Marble size.
  Small marble it is assumed 1/2")

 

3/4"  PENNY size     

Picture

7/8"  NICKEL size

Picture

1"  QUARTER size Picture
1 1/4"  HALF DOLLAR size Picture
1 1/2"  PING PONG BALL size Picture
1 3/4"  GOLF BALL size Picture
2"  LIME size Picture
2 1/2"  TENNIS BALL size Picture
2 3/4"  BASEBALL size Picture
3"  LARGE APPLE Picture
4"  SOFTBALL size Picture
4 1/2"

 GRAPEFRUIT size

Picture
4 3/4 - 5"

 Computer CD-DVD size

 
 

 RECORD SIZE

Picture

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.

  WWW.MKE-SKYWARN.ORG
   
WIND SPEED STRAIGHT-LINE WIND GUST ESTIMATES
45-57 MPH
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.

58-74 MPH
Severe

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.

75-89 MPH
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.

90+ MPH
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.

New January 20, 2006. Updated May 14, 21, Sept 23, Oct 29, 2007, Copyright © 1996-2008.

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