This has been submitted to the NTP community as bug 3721.
https://bugs.ntp.org/show_bug.cgi?id=3721

--- ntpd/ntp_proto.c.orig
+++ ntpd/ntp_proto.c
@@ -2973,7 +2973,9 @@
 	 * Clock exceeds panic threshold. Life as we know it ends.
 	 */
 	case -1:
-		msyslog(LOG_ERR, "Clock offset exceeds panic threshold.");
+		msyslog(LOG_ERR,
+		    "Clock offset %d seconds exceeds panic threshold.", 
+		    (int) sys_offset);
 #ifdef HAVE_LIBSCF_H
 		/*
 		 * For Solaris enter the maintenance mode.