New Canadian radar software was brought on line in May 2002 to complement the now nearly completed network of 30 Doppler radars across Southern Canada. The software allows a more complete analysis of convective storm structure. A description of the functionalities of this software is given in a companion paper in this conference. These functionalities have been designed for the Canadian weather-warning environment.

As a proof of concept, we will examine the July 4 2001 severe weather outbreak in Southern Ontario. Severe weather was observed across the area of three radars under the warning responsibility of a single forecaster. This storm produced a wide variety of severe weather including several reports of golf ball to baseball size hail, two F1 tornadoes and some wind damage reports. There were numerous storms with long-lived mesocyclones that produced little or no wind damage and a couple of short-lived mesos with rather shallow BWER's that did produce tornadoes. It was a hectic day with many storms to monitor.

The radar software allows cell views and provides SCIT and storm classification algorithm data not available to the forecaster at the time of the storm last summer. The paper will demonstrate the improvements that the new software provides.