Mailing List lml@lancaironline.net Message #48263
From: GT-Phantom <gt_phantom@hotmail.com>
Sender: <marv@lancaironline.net>
Subject: RE: [LML] Re: Garmin 496 XM - NEXRAD False Echoes
Date: Tue, 05 Aug 2008 11:37:59 -0400
To: <lml@lancaironline.net>
Yep.  Everyone should understand what data is actually being presented to them.
 
Wikipedia has a good article on NEXRAD.  While NEXRAD can pick up precipitation, it also picks up wind activity which often precedes cloud formation (particularly vertical movement). 
 
If you are flying IFR and fly through rain not on the NEXRAD (presuming you are in a covered area), chances are it will not be violent - but there is no guarantee.
 
Cheers,
 
Bill Reister


From: MikeEasley@aol.com [mailto:MikeEasley@aol.com]
Sent: Monday, August 04, 2008 13:42
To: lml@lancaironline.net
Subject: Re: [LML] Re: Garmin 496 XM - NEXRAD False Echoes

I've attached an image that I pulled up from AccuWeather.com this morning about 7:00 local.  This is very similar to what I was seeing on the 496 last Friday.  As you can see from the satellite image, not a cloud in the sky.  So it sounds like my 496 is working fine, just a glitch in the NEXRAD technology.  Still looking out the windshield!
 
Mike Easley




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