Quote:

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139
URNT12 KNHC 181212
VORTEX DATA MESSAGE AL042007
A. 18/11:51:20Z

P. AF304 0604A DEAN OB 03
MAX FL WIND 145 KT NE QUAD 11:48:40 Z
SMALL HAIL INBOUND NE QUAD
RADAR PRESENTATION EXCELLENT

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Small hail is usually indicative of a storm trying to gain More intensity. Also unnerves the flight crew to some degree.
Imagine hail hitting your car while traveling at 300 mph instead of 60mph.