[WIham] Fwd: SKYWARN: 1" Hail Standard Goes Nationwide

[Mark Thompson]

----- Forwarded Message ----
From: Milw Area Skywarn Assc. <svoros at execpc.com>
To: Undisclosed-Recipient:;@extsmtp2.localnet.sys
Sent: Thu, December 31, 2009 10:15:28 AM
Subject: SKYWARN: 1" Hail Standard Goes Nationwide

 
Since April of 2009 much of the upper Midwest 
used 1 inch (quarter-size) hail stones as the
minimum size to trigger a severe thunderstorm 
warning. Beginning January 5, 2010, that value 
becomes nationwide. The wind gust criteria (58 MPH) remains the same.
 
The change is based on research data indicating significant damage does not occur until hail 
size reaches 1 inch diameter and by requests from the media and emergency 
management. 
This size also allows storms spotters to concentrate on the more 
significant storms.  
 
There are short PDF, Powerpoint, and Flash versions 
w/audio at: http://www.weather.gov/oneinchhail

 
Happy New Year!
 
Skip Voros (WD9HAS)
Executive Director
 
 
 
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