Inspired by Develop your own weather maps and alerts with Perl and GD, I have put together a script which downloads the base radar image from a specific site at a specified interval. 
use strict;
use LWP::Simple;
use POSIX;


my $refresh = 1800;

do {



    my $base="http://radar.weather.gov/ridge/RadarImg/N0R/MTX_N0R_0.gi
+f";
    
    my $timestring = strftime( "%Y%m%d_%H%M%S", gmtime() );

    

    my $savefilename = "SLCRadar_".$timestring.".gif";
    my $status = getstore($base,$savefilename);
        print $status."\n" ;


sleep $refresh;

} while ($refresh);

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In reply to Automated downloading of NOAA radar images by Scott7477

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