T-Storm Warning Change

It has been a hot topic for the past few years, that 3/4 inch diameter hail simply doesn't pose a damage threat.  Simply put, the speed in which a hail stone that size falls to the ground, doesn't achieve a high enough speed to cause damage.  However, a hail stone that is 1 inch in diameter will achieve a high enough speed to cause damage.  So, the National Weather Service has bumped up the severe criteria for hail to 1 inch in diameter or larger.  A good move, if you ask me.  Trying to determine the difference between 3/4 inch and 1 inch diameter hail based on radar is pretty tough.  It may cause a few less warnings to be issued, but we'll see.  Below is a VODCAST that the NWS put together talking about why the change was made.  

Discussing the reasoning behind the change, a 5-minute presentation by our Central Region Headquarters is available on this VODCAST.

Chief Meteorologist Brian Bledsoe



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  • by Tim Stoecklein Location: C. Springs on Mar 23, 2009 at 09:29 PM
    I was in northeast KS when the "midwest" WFO's began using the 1" criteria on a trial basis. It really didn't impact us too much from a "spotter" stand point as the NWS still likes to get all hail reports as a means of monitoring a developing storm. However, I completely agree it is a positive move from the aspect of the general public becoming less sensitive to issued warnings. I will say, however, 3/4" inch hail driven by a 40-50mph wind hurts just as bad as 1" hail :)
  • by Ryan Location: Monument on Mar 10, 2009 at 09:55 AM
    hmm I guess this summer is going to be interesting you would see severe thunderstorms on TV Brian I think that you are the best guy to do severe weather during the summer I think that more people would rather watch you during the summer than any other meteologeist I can't wait to watch you this summer
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